Antea Group and HPC, Inogen Associates, co-presented at the EHS&S Workshop at the Brightlands Chemelot facility in the Netherlands. Topics covered include a look at the types of wastewater discharge, the scope of consulting for industrial clients, and case studies.

1. Wastewater
Management
Peter Metzen, HPC
Eize Drenth, Antea Group

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Content:
• Introduction
• Standard types of discharge
• Scope of consulting for industrial clients
• Recycling of discharge type 1 – Example Food industry
• Recycling of discharge type 2 – Example Textile industry
• Recycling of discharge type 3 – Example Industrial park
• Conclusion

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Introduction
• Closed loop for water is a common wish for most industrial
wastewater producers
• What means „closed loop“?
- Installation of maximum possible rate for reuse or
recycling of treated wastewater
- Reduction of water footprint
- Reduction of environmental impact
- Zero emission of wastewater is under normal
commercial conditions not possible

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Industrial clients
Scope of consulting/engineering in industrial wastewater projects
• Preparation of a wastewater cadastre
• Evaluation of actual costs for wastewaterdisposal
• Definition of quality requirements for reuse of water in production
• Evaluation of actual or expected legislation
• Identification of future cost and possible savings
• New developments and new process technologies
• Concept for watermanagement in production
• Technical/commercial report as base for a decision
After Decision of client:
• Detail Design and all engineering services needed for the treatmentplant and
waterrecycling
• Start of plant operation and training of staff
• Engineering and Installation

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Industrial clients
Scope of works for wastewater cadastre
• Integrated Status analysis (Fresh water, wastewater, wastes)
• Preparation of a wastewater cadastre
• Wastewater flows and wastewater sources and waterquality (analytic)
• Are different wastewater types collected together or separately?
• What Quality requirements for reuse of water are relevant?
Example:

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Standard types of discharge
Industrial plant
Municipal
Wastewater Treatment Plant
River
direct discharger
wastewater
Industrial
wastewater
treatment plant

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Standard types of discharge
directdischarger
indirectdischarger
CN =
5 m-1
CN =
25 m-1
CN =
85 m-1
rawwastewater
example:
different effluent qualities
after treatment

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Recycling of discharge type 1
Industrial plant
wastewater
Recycling XX %
Industrial
wastewater
treatment plant
Municipal
Wastewater Treatment Plant
River
indirect

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Situation
The malthouse formerly had the status of a direct discharger and was forced by
the local authority to become a indirect discharger.
Consequences for malthouse
• Price for the wastewater discharge into sewer system: 2,88 €/m³
• Yearly fee for wastewater discharge: appr. 1.500.000,- € per year
Example: Food Industry

10. Without recycling
fresh water demand: 70 m³/h
wastewater: 56 m³/h
With recycling 80%
fresh water demand: 26 m³/h
wastewater: 12 m³/h
Example: Food Industry

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Solution designed
Reduce the wastewater quantity from 100% to 20% by designing a complex water
recycling.
• 80 % of the water is recycled to drinking water quality (appr. 420.000 m³/a) and
used in production
• 20 % of the water is discharged (appr. 105.000 m³/a)
• Invest of recycling plant: 1.250.000,- €
• Spec. price of recycling: appr. 1,20 €/m³ versus 2,88 €/m³ for disposal
Benefits for malthouse
• Saving on wastewater fee: appr. 705.000,- € per year
• Saving on rainwater fee: appr. 280.000 € per year
Example: Food Industry

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Recycling of discharge type 2
Industrial plant
Municipal
WWTP
Industrial
wastewater
treatment plant
Treatment
effluent

13. Example: Textile Industry
recycling water stream
anaerobic
treatment
biomass
aerobic
treatment
biomass-
separation
wastewater stream
anaerobic
treatment
aerobic
treatment
biomass-
separation
biomass
well water
conditioning
municipal
wastewater
treatment plantproduction
pre-treatment
dyeing
printing
tightening
washing
aerobic treatment
with
membrane filtration
filtrate
biomass
process water
storage
tank
oxidative treatment
for decolorisation
ozone
flow chart

14. Specification and
Requirements:
Crude water
DOC: 209 - 367 [mg/l]
colour number CN
49 - 115 [1/m]
Pre-treatment of
wastewater for further
treatment in urban
waste treatment plant
(wastewater stream)
Treatment of wastewater
for reuse in textile factory
(recycling water stream)
Example: Textile Industry

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Recycling of discharge type 3
Industrial Park
Industrial plant
River
wastewater
recycling XX %
Industrial
wastewater
treatment plant
Treatment

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Example: Industrial Park
Turn-Key
- wastewater treatment
- complexe cyanide
- infl. 190 mg/l effl. 0,9 mg/l
- CE-declaration
- NRB-directives
- BRL-directives
- construction/engineering
- Mechanical en Electrical
- delivery: December 2016
Manufacturer
- herbicide (dichlobenil)
- synth. oil voor windturbines
- worldwide approx. 900 MEuro
Roadmap
- 2 year research with client
- tech-partner
Van Remmen UV Techniek B.V.

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Example: Industrial Park
EU-wastewater derectives:
- prohibited to discharge waste water to the surface water
- change in content waste water
Question:
• Ammonium 50 mg/l
• Cyanide totaal 160 mg/l
• Indamp rest 41 g/l
• Chloride 3200 mg/l
• Carbonaat 13.700 mg/l
• Bicarbonaat 17.000 mg/l
• Natrium 13.000 mg/l
• pH 11

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Example: Industrial Park

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Standard solution in the past for industrial plants
Discharge of the wastewater without recycling
Reasons for water recycling
• reduction of costs
• in some regions: unsufficient water supply
• reduction of water footprint
• environmental foot print
• new developments
Technical view
• the higher the recycling quote the bigger the costs
• recycling quote up to 60 – 80 % save costs
• 100% closed loop is almost not possible
• residuals (salts, screenings, concentrates etc) have to be disposed
Conclusion

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