Industrial water treatment - Royal Haskoning

Industrial water treatmentPartner in industrial water

For many years Royal HaskoningDHV has been closely involved in all water aspects of industries and businesses. Covering all aspects from the improvement, extension and/or complete replacement of existing water and wastewater treatment plants, we also handle the realization of new water plants. The Royal HaskoningDHV experts always seek to provide reliable and cost-effective solutions. We specialize in process water and cooling water systems, water optimization studies related to core processes, sewer systems, water recycling, wastewater treatment and zero liquid discharge.

Industrial water treatment

Royal HaskoningDHV renders a full range of services in various partnership or contract forms: from consultancy and pilot trials, to turn-key delivery of the water plant, including its operation and maintenance.

Our process experts are well known as pioneers and leading professionals in sustainability, capable of integrating sustainable solutions to maintain the quality objectives and success of your company.

2Royal HaskoningDHV Industrial water treatment


Design & EngineeringRoyal HaskoningDHV has a substantial pool of experienced designers, engineers and draftsmen, who can deal with all relevant design tools. We are structured to execute all your civil, mechanical and electrical engineering tasks. Furthermore we can supply specialized knowledge concerning process automation and advanced control of your installations.

ProcurementRealizing or supplying a new installation or technology contains specialized professions. We have a vast network of reputable, recommended suppliers and contractors to draw from for these tasks. Royal HaskoningDHV is perfectly equipped to execute the complete purchasing tasks of defined parts or the complete installation. And we are able to evaluate and optimize your procurement activities.

RealizationRoyal HaskoningDHV can assist you with the realization or refurbishment of an installation; from construction supervision to commissioning and start-up. For this several contract models are available, from traditional consultancy to turn-key and design & build. We can also offer innovative, risk bearing contract models such as Design and Construct or Alliance models.

Feasibility & system selection studiesGood advice starts with good research. We can assist in all types of studies. In feasibility studies we evaluate the technical, technological and financial feasibility of a new installation or product. Besides this, we have vast experience in system comparisons to identify the most appropriate and cost effective solution for your specific water issue.

Pilot researchIf you are interested in specific technologies, we can supply the relevant pilot units (various sizes available). Our process engineers execute the trials, preferably on site, and determine together with you which tests are required to efficiently select or optimize the target process. The results from these trials become the design parameters for the feasibility study or full scale design, to reflect the actual process efficiencies and process stability.

Customer-related service at all stages of projects

Operations & MaintenanceOur specific knowledge and experience not only yields an added value in the design and execution of projects, but also in the areas of operation and maintenance. The input from our specialists translates to a reliable process operation at the lowest possible cost. This expertise can be brought into several contractual forms; depending on your preference we can train your operators and maintenance engineers, or we can supply the personnel ourselves in the form of operational lease.

Asset ManagementWhen you are considering outsourcing the operation of several installations or even the total industrial site, we can be at your service. We are very experienced in the management of your assets. Royal HaskoningDHV offers, apart from huge expertise regarding water infrastructure and water installations, multidisciplinary know-how on all aspects of industrial operation and maintenance.

Evaluations & BenchmarksA useful tool associated with company takeovers and/or re-organization is the evaluation of the water infrastructure. Not only the technical issues are addressed, but also the permits and company liabilities are reviewed. An important management tool for improving objectiveness is the use of benchmarks across various branches. We are uniquely positioned to evaluate performance indicators related to your water usage, treatment costs and water infrastructure, and to make comparisons with other performance evaluations from the market.



Training & educationOur extensive experience of industrial (waste)water treatment processes, allows us to offer tailor made operator trainings and courses. These venues take often place at the client’s site, for groups of various sizes and education backgrounds. Our ‘Industrial (waste)water treatment’ courses cover both biological and physical/chemical treatment aspects. General treatment principles are integrated into specific queries concerning the clients’ own treatment plant and practical experiences.

Secondment & interim managementThe experience of our specialists or project managers can also temporarily and effectively be brought into your organization by secondment or interim management. Our specialists are characterized by up-to-date skills, flexibility, vast experience and a practical approach.

At your service when operating your (waste)water

Permitting & LicensesEnvironment and licenses are important core competencies of Royal HaskoningDHV. All know-how and experience are within one company. This expertise guarantees an efficient support of our principals in environmental aspects and license application. Examples of our services are: environmental annual reports, environmental planning, waste control, emission reduction, noise and odor reports, soil investigation and remediation, ABMcompliance, IPPC, BREF-compliance, labor conditions, EIA’s environmental and discharge permits.

SafetyManaging industrial safety, risk assessment and emission control is an essential component in the industrial environment. We have extensive knowledge in this field and can assist you regarding: process and operator safety, health (HSE), emission control and risk analysis of the process, alsothe design and operation of the system can be reviewed (HAZID, HAZAN, HAZOP, RIE etc).

Sustainable developmentThe concept of sustainable development is now widely recognized as important strategy and vehicle to improve companies’ success and continuity. Being a pioneer in this field, we have distinguished know-how and expertise. From developing your sustainable strategy, providing practical assistance in fulfilling your strategy, producing annual sustainability reports up to corporate communication, we are your partner. Apart from this we assist corporations with take over’s, reorganizations and improvement of their efficiency. Royal HaskoningDHV targets solutions where waste is transformed into valuable products.

SubsidiesIn many cases it is possible to lower the investment costs by applying for subsidies, especially when the investment aims innovation and environment. We have great experience and track record in subsidy applications and many times we have been successful in acquiring subsidies for our principals.

Project managementProject Management is often vital to ensure successful execution of projects and construction. Our project managers are experienced, driven by results and have proven to be a master in guiding project teams, partners and contractors to cost-effective solutions.

Trouble shooting, optimization & de-bottle-necking: Operational ExcellenceWhen operating your (waste)water treatment installation, all sorts of thing can go wrong. Royal HaskoningDHV is available to support you with in-depth process knowledge at your site. We will analyze the problem, advise you concerning the solutions and assist you with the implementation thereof. Irrespective of dealing with water, wastewater, cooling water or process water, the process can always be optimized. Our process engineers are experts in improving your treatment processes. We assist with water and energy reductions and improvement of your water quality.



Closing the industrial watercycle

Raw Water TreatmentFrom intake to treatment of process and cooling water

Water FootprintHow much fresh water is used directly and indirectly to run andsupport the business?

Integrated industrial water managementSustainable use of natural resources related to water, energy & environment

Optimisation of water managementFrom optimisation studies to practical solutions to save water, energy and costs

Water quality monitoringAquaCCP®: safe use and reuse of water within the HACCP-system

Environmental permitsAssistance to becomecompliant with governmental legislation

Ground WaterFrom resource monitoring to production of process water

Waste water treatmentFeasibility studies, design, tendering, construction & optimisation, contracting, Nereda®, ABR)

Private investment strategiesFeasibility studies for private investment strategies (PPP, BOOT, PBC, etc) and assistance with regard to financing

WaterEmissions managementFrom go/no go studies tomodelling and permits forintake & discharge

Storm water managementClimate Check: can the sewer system & waste water treatment on your site cope with excessive storm water

Water recycling & advanced treatmentSmart cascading, from waste water to ultrapure, resulting in savings on water, chemicals, energy and costs

Cooling WaterCool Toolbox: from legionella risk analysisto a compreheansiverange of solutions

Oil & Gas Chemical Metal & Mining Food Petro-chemical Pharmaceutical Paper & Pulp



Carrousel®The advantage of the Carrousel is its continuous biological process of BOD/COD removal and simultaneous nitrification and denitrification in one reactor, with only a limited amount of equipment required. The oxidation ditch is a looped channel system, featured by a central dividing wall and a surface aerator, the Oxyrator®, positioned at one or both ends of the wall. The Oxyrator® is a low-speed vertical shaft surface aerator. Its function is three-fold: It adds oxygen to the treatment process, it thoroughly mixes the wastewater and the purifying biomass (‘activated sludge’) and it creates and maintains the flow circulation through the channels.

Over the past 40 years, the Carrousel® has proven itself as a cost-effective, reliable and highly efficient method for the biological treatment of wastewater from both municipalities and industries.Over 1,200 systems have already been successfully implemented world-wide, with treatment capacities ranging from as little as one thousand population equivalents (p.e.) to as high as ten million p.e.

Products & technologies

BABE™The ‘Bio-Augmentation Batch Enhanced’ technology, is a compact and simple technology for the treatment of wastewater, containing (very) high concentrations of specific chemicals. Many industries, as well as numerous municipal wastewater treatment plants produce wastewater with high concentrations of specific chemicals. In the BABE-process, this wastewater together with a specific quantity of sludge from the main process pre-treated (in parallel) in a sequential batch type reactor.

The (pre)treated water and part of the BABE biomass is returned to the main process after the reaction and settlement. In the main process the BABE biomass continues with the removal of the specific chemicals, whilst improving the performance of th emain process sludge, this augmentation effect is possible as specific micro-organism in the normal flock forming biomass of the main process are enmeshed with the BABE sludge.

The BABE-process can be applied for the treatment of any slowly biodegradable components. B.A.B.E. technology is particularly appropriate for existing wastewater treatment systems that require a greater nitrogen removal capacity.

MBRCompared to the conventional activated sludge process, Membrane Bio Reactor (MBR) wastewater treatment technology guarantees superb effluent quality and requires significantly less space. The biological process of a MBR is comparable to that of a conventional activated sludge plant.

The MBR combines the activated sludge process with membrane filtration in one compact reactor.Separation of sludge and final effluent (permeate)takes place by means of membranes, by which all suspended solids are filtered out. The result is reduced sludge production, and excellent effluent quality which enables possibilities for water re-use and hence, cost saving.

MBR technology is appropriate for small and large scale industrial wastewater treatment applications.Existing active sludge systems can be converted to a MBR system. Royal HaskoningDHV offers MBR systems with the new generation of membranes with significantly lower energy consumption.

MBTFCost-effective treatment of air, water and air/water mixtures is possible with the Moving Bed Trickling Filter (MBTF).The MBTF is a biological filter which can be used for the combined treatment of wastewater and foul air. The MBTF offers attractive advantages and good economics when considering treatment of air or wastewater independently. The major benefit is realized with the possibility of treating waste water and air simultaneously as separate investment for air treatment equipment is unnecessary.

The MBTF costs can be largely offset against the reduced waste water charges. The main advantages of the MBTF are high separation efficiency and high capacity. Furthermore, the MBTF is ‘continuously self-cleaning’ and has proven to be relatively insensitive to suspended solids and fats in the wastewater stream. This often makes the use of coagulants or flocculants in the pre-treatment unnecessary. It is a non-clogging, robust and universally applicable system. The MBTF has a small footprint, is easy to operate and has low energy consumption. Considerable operation and investment savings can be achieved.



Nautilus™Optimal flexibility and control of the MBR wastewater treatment plant with the independent Nautilus™ MBR concept. Royal HaskoningDHV has world-class know-how with most commercially available membranes. We have also gained hands-on experience with the design, engineering, constructing and operation of MBR installations. This experience, combined with in-depth knowledge of MBR processes, resulted in the Nautilus™ concept.

The Nautilus™ concept is an optimized design and control system. This concept’s most valued feature however, is that membranes of various suppliers can be interchanged, offering end-users maximum flexibility. Not only can the design be tailored to the chosen membranes during realization, but the end-user has the possibility of replacing the membranes with other suppliers’ membranes in the future.


SBRThe Sequential Batch Reactor (SBR) technology for aerobic biological wastewater treatment has good sludge settling characteristics, resulting in a reliable and excellent effluent quality. The SBR is a batch operated activated sludge process where one or more reactors are operated in parallel. The typical cycle for each reactor consists of four phases, the fill phase, the reaction phase, the settling phase and the decant phase. By changing the process settings, aerobic, anaerobic or anoxic conditions can be created.

The treatment steps are all done in a single tank, where conventional treatment processes use several Process zones and recirculation steps, followed by final settling in separate tanks. SBR technology is characterized by its relatively low investment and operational costs, coupled with its small spatial requirements. The high reliability enables optimal temperature control, without virtually any odor issues. The advantage of a SBR is the process flexibility to achieve the specific design and discharge requirements.

Nereda®Our innovative water purification technology Nereda® results in lower investment and operational costs and scores higher in sustainability whilst reducing the plant’s footprint. Nereda® is a hybrid SBR process with biological purification capability for industrial and municipal waste water treatment. This technology uses granular biomass, with a granule settling speed 10times faster than that of conventional flocks. The improved settle ability allows the process to be operated at mixed liquor concentrations comparable to that of MBR (3-4x that of conventional processes), while maintaining the high settling velocities. The aerobic granular sludge removes organic compounds as well as nutrients like nitrogen and phosphor to a high extent. Furthermore, given the high biomass concentration, Nereda® only requires a compact installation with accordingly low capital investments.

Due to the extremely short settling time it is beneficial to operate Nereda® as a Sequencing Batch process in a single reactor, which eliminates the need for separate clarifiers. By using either a buffer tank or several, parallel Nereda®-reactors, the wastewater treatment system can be operated as a continuous process.

ABR®The Anti Bulking Reactor (ABR)® is a robust solution to prevent bulking sludge problems within wastewater treatment plants, whilst effectively reducing oxygen demand and bio sludge production.In industrial wastewater treatment plants problems with bulking sludge are often caused by easily biodegradable components. Poor settling results in reduced performance and loss of active biomass.The ABR® biodegrades the components in a kind of chemostate with a hydraulic residence time of 4 to 20 hours. Additionally, the ABR® decreases overall oxygen demand and biosludge production by approximately25%, whilst providing an effective oxidation of reduced sulphur compounds.

The ABR® process performs well at high and low temperatures. Given the compact and simple design, ABR® is a very cost-effective upgrade for improving the performance of existing, overloaded, treatment plants or even as alternative to anaerobic pretreatment.

The ABR® can be applied in industrial wastewater treatment processes with high C/N ratios and a COD concentration of more than 1000 mg/l. Also, the combination of the ABR® with Carrousel® has proven to be a winning solution.



Anaerobic treatmentAnaerobic pre-treatment aims to reduce the energy needs of a treatment process. Because of the formation of Biogas, anaerobic treatment has specific appeal as pre-treatment of COD-rich wastewater flows. Biogas is an energy source which can be used for several applications, like heat, electricity or green gas (transport fuel). Royal HaskoningDHV has great in-house expertise regarding anaerobic treatment, further post treatment and possibilities for the usage and sales of Biogas. Our independent knowledge is of great value, particularly during system selection studies, based on technical and economical aspects. We also have extensive experience in the startup and operation of anaerobic treatment plants, enabling us to design your anaerobic treatment process with the lowest capital and operational expenditures.


Physical / chemical water treatmentIn several industries, physical/chemical treatment processes are used to remove or in some cases recycle specific components from the wastewater. Chemical precipitation is an old process at which inorganic components are separated from the wastewater by superseding the specific solubility as sludge flocks. This superseding is usually realized by the addition of specific chemicals. This type of process is still often used because of its robustness and its ability to remove multiple components simultaneously.

For example in the DND process (Detox-Neutralisation-Dewatering),several metals are removed whilst cyanide and nitrite are oxidized and chromium (VI) reduced to harmless components. It is also possible to recycle sulphate and Magnesiumammoniumphosphate (MAP).The so-called struvite.

DAF‘Dissolved Air Flotation’ enables the extensive removal of suspended solids and free and emulgated fats and oils from the wastewater. A DAF is often used as one of the first steps in the treatment process, making the wastewater suitable for discharge or further biological treatment. In a DAF-installation very small, fine dispersed air bubbles are released. These bubbles attach to the fine particles in the water which floats them to the surface. With the addition of coagulation and/or flocculation aids this effect can be enhanced. The floating sludge is then removed by means of a scraper device and discharged to a container to be further thickened or dewatered.

The DAF is ideal to remove free and emulgated fats and oil as well as high and fluctuating concentrations of suspended solids. This process is also often used to protect or relieve overloaded downstream processes.

Crystalactor®The Crystalactor® not only efficiently treats water without residual waste and is applicable for softening of(process) water, but also offers the recovery of heavy metals, phosphates and fluoride from wastewater to a quality with high market value. The Crystalactor® is a fluidized-bed type crystallizer for the treatment of water and wastewater. The heart of the treatment plant is a pellet reactor, partially filled with a suitable seed material like sand or minerals. The wastewater is pumped in an upward direction maintaining the pellet bed in a fluidized state. In order to crystallize the target component on the pellet bed, a driving force is created by a reagent dosage and pH-adjustment.

With the appropriate process conditions, co-crystallization of impurities is minimized and high-purity crystals are obtained. The pellets grow and move towards the reactor bottom. After drying, readily handled and virtually water-free pellets are obtained. No sludge dewatering is needed. The pellets can then be recycled or reused, resulting in no residual waste for disposal. Another advantage is that the four steps of conventional physical-chemical treatment processes are combined into one, resulting in a very compact treatment process. Filtration techniques

Filtration is often used as final polishing step to reach the required effluent quality. Filtration is a commonly applied process in a (waste)water treatment plant. The principles and executions are numerous and are dependent on the particle size and concentration of the components to be removed. For example for larger particles, bag filters or sand filters are used and for dissolved ions membrane filtration.



BioWatchThe microbiological composition of the activated sludge is essential for the performance of a biological wastewater treatment plant. This composition can be influenced by carefully adjusting the right parameters. The BioWatch assesses the quality (and composition) of the sludge periodically, in order to stabilize and optimize process conditions. It is also possible to anticipate on process disturbances.With microscopic techniques various characteristics of the sludge (flocs, bacteria, higher organisms) are monitored and combined with analysis of the operational data, practical measures for improvements are recommended or implemented. Incase of acute problems, our experts can offer immediate support on location.

Services, studies & scans

Water Footprint AssessmentWith the Water Footprint Sustainability Assessment we aim to support industries, governments and project developers in their endeavor to more sustainable and socially responsible production and development. This tool portrays the water footprint and the impact of water consumption on the environment. Furthermore this tool identifies key indicators in the production chain, leading to more effectives and efficiency and hence to a better sustainability score in the water compartment. The WaterFootprint doesn’t stand alone. Footprinting became an essential element in the measurement of sustainability achievements. Apart from the Water Footprint, the carbon -,the social – and the ecological footprint are also vitally important indicators.

AquaCCP®To guarantee safe use and reuse of water within the food industry Royal HaskoningDHV developed AquaCCP®: a water quality control tool to support. The core of AquaCCP® is formed by an efficient tailor-made water quality monitoring system. The monitoring network becomes the key water component in the companies’ obliged HACCP system. A successful introduction of AquaCCP® within the companies’ HACCP system obviously requires chemical and microbiological water expertise and experience in the field of food production and HACCP systems. We connect all these requirements. After the embedding of AquaCCP® in the HACCP system, information for the companies’

operations and utilities managers will be produced. Directly based on the produced information interventions in day to day production becomes possible to ensure safe and reliable food production.

Energy Potential ScanIndustrial processes are often energy intensive processes, where water is most of the time also an energy carrier. Royal HaskoningDHV has up-to-date knowledge of all possibilities of heat- and energy recovery related to the water housekeeping and CHP (Combined Heat Power) links, including associated engineering. The Energy Potential Scan (EPS) structures the current energy consumption and the various possibilities in energy savings. The goal of the inventory is not only a list of measurements. The ultimate goal is a permanent energy and cost reduction. During the execution of the EPS, the employees of the participating company are actually doing the inventory activities themselves. For this purpose they are working in an Energy Action Team with assistance of a Royal HaskoningDHV consultant.

SludgeScanThe costs for sludge treatment and sludge disposal are generally about 30 till 50 % of the total operational costs of a wastewater treatment plant. Royal HaskoningDHV’s SludgeScan is aimed at reducing these costs. During a SludgeScan an inventory is made of sludge production, sludge composition, treatment process, operational management, options for alternative and cost reducing disposal and overall costs. Several efficiency and innovation measures are simulated and the best are selected for implementation. Experienced technology experts carry out the SludgeScan in close cooperation with the client.

CODECo-digesters plants produce digestate as residual. At this time digestate is classified as an expensive waste stream. Without governmental subsidy co-digesters are not profitable. Royal HaskoningDHV developed a new process called CODE (Central Processing Sustainable Deliverables). In this process the digestate is reprocessed. The raw materials are extracted in order to convert it to useful products like fertilizers and biopolymers. This means that CODE converts waste to raw materials. Instead of processing and waste disposal costs a profitable product is generated. CODE technology is sustainable and makes biobased economy initiatives without governmental subsidy profitable. It provides a solution for the manure problem in the agricultural sector as well.



WaterScan and Water recycling towards Zero dischargeThe WaterScan optimizes water management processes to achieve water and cost savings. It is the first step to gain insight in the possibilities for water reclamation and reuse or even more to close the water cycle completely. To a total water loop closure the WaterScan is an approach whereby a scan is made of the current water consumption, identifying optimal ways to save water and the organizational measures necessary to achieve a consistent reduction in water consumption (and costs). Also relevant innovative measures for water reclamation, reuse and recycling are explored. The WaterScan results are presented in a clear and prioritized overview of practically feasible cost reductions and optimizations fully tailored to the client’s specific situation and has proven itself in various industries. When applicable also a complete ‘pinch study’ can be done.

Services, studies & scans

Cooling Water Systems / Cool ToolboxWe are expert in the field of cooling water systems. Our services for all cooling water issues - like cooling water designs, make-up water, IPPC BREF Cooling, legionella - are combined as Cool Toolbox. Our activities can be divided in design activities and the application of tools and services. Regarding the design this includes cooling water piping and cooling water intake and outlet constructions. Apart from specific hydraulic expertise regarding water hammer analyses and flow conditions Regarding the tools Royal HaskoningDHV has extensive experience with the permit requirements, application of permits and all relevant procedures, thermal heat calculations, fish guiding systems, chemical dosing, filters, pumps and material selections. We offer all the required expertise in-house and are able to do the complete design, engineering and realization of your cooling water system. When doing so we take care of all power is land interfaces, as well as all possible connections with the authorities.

From design of inlet works up to design/construction of megawatt cooling towers, our specialists are at the head of the industry.

Industrial sewerage infrastructureThe underground infrastructure of a company is of vital importance. It is of the utmost importance to inspect and control your sewers periodically, including the data processing, to avoid yourselves being confronted with unexpected production interruptions.. The available information from the periodical sewer management enables you to communicate sound and clear with the applicable authorities. Royal HaskoningDHV is the asset manager of the complete sewer system of the Chemelot site in Geleen, the Netherlands, one of Dutch largest industrial sites. We have extensive experience with the technical and hydraulically design, the optimization, installation, manage and maintenance of industrial sewerage systems. We work with several (own) management programs using GIS application to take care of the sewer management and inspection schemes for many clients. Furthermore we developed the Climate Check to predict – on the basis of different climate scenarios - when the limit of a company’s sewer system, waste water treatment plant our surface water is reached.

Process AutomationRoyal HaskoningDHV supplies a full range of services regarding process automation and advanced process control. Next to writing your treatment plant’s specifications for optimal controls, Royal HaskoningDHV also supplies solutions for remote assistance for your plant operations. We are able to dial in to your control system, make modifications or support your operators. We also provide services and products to take over your reporting obligations. We manage your process data and supply you periodically with the requested reports of operational management and authorities. In the process automation, we supply the most advanced solutions, resulting in lower energy consumption for e.g. your aeration processes.

Process waterRoyal HaskoningDHV has considerable experience in the design, engineering and operation of water utility installations. Our designs consider the availability of sufficient water and the required quality at the most competitive price. Our expertise ranges from process water, cooling water make-up, softened and demineralized water and boiler feed water, up to production of ultrapure water for use in pharmacy and micro-electronics. We provide the services in the whole project cycle, from system selection (according the new IPPC Regulations), ecological impact studies, design and engineering up to construction, start-up and optimization.



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Royal HaskoningDHV is an independent, international engineering and project management consultancy with 135 years of experience. Our professionals deliver services in the fields of aviation, buildings, energy, industry, infrastructure, maritime, mining, transport, urban and rural development and water. Backed by expertise and experience of more than 6000 colleagues across the world, we work for public and private clients in more than 150 countries. We understand the local context and deliver appropriate local solutions.

We focus on delivering added value for our clients while at the same time addressing the challenges that societies are facing. These include the growing world population and the consequences for towns and cities; the demand for clean drinking water, water security and water safety; pressures on traffic and transport; resource availability and demand for energy and waste issues facing industry. We aim to minimise our impact on the environment by leading by example in our projects, our own business operations and by the role we see in “giving back” to society.

By showing leadership in sustainable development and innovation, together with our clients, we are working to become part of the solution to a more sustainable society now and into the future.Our head office is in the Netherlands, other principal offices are in the United Kingdom and South Africa. We also have established offices in Indonesia, Thailand, India and the Americas; and we have a long standing presence in Africa and the Middle East.

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Royal HaskoningDHVGerben van OmmerenE [email protected] +31 88 348 2424

Industrial water treatment - Royal Haskoning

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