Dairy Company: Discharge of Untreated or Ineffectively Treated Wastewater
Provided by the International Finance Corporation
A Dairy Company,
A medium-sized multinational company operating from northern
Contamination of surface water/downstream river
- Investigate all sources of wastewater and minimize wastewater generation by reducing non-consumptive water usage
- Develop water balance and identify opportunities for reduction in wastewater generation by modifying/replacing water-intensive or wet processes with zero-water or water-efficient technologies (e.g. sweeping with brooms vs. sweeping with water)
- Replace or minimize the use of potentially toxic or hazardous substances that may contaminate wastewater
- Collect nontoxic and uncontaminated concentrated liquid wastes for sale to pig farmers or cattle farmers (if possible), thereby reducing the overall load on the effluent treatment plant (ETP)
- Optimize effective wastewater treatment by:
- Evaluating the efficiency of the ETP by analyzing the ETP “inlet” and “outlet” characteristics and other operating parameters.
- Evaluating treatment works for hydraulic and or organic slug flows such as bottle and equipment washing; adjust to an integrated flow rate that matches the design flow
- Minimizing fluctuating loads on the ETP by having a collection and “equalization” sump before treatment or temporary holding facility
- Scheduling and staggering bottle washing and other water-intensive operations (if possible) to distribute the load on the ETP over a 24-hour period
- Installing interlocking system to ensure ETP shutdown during any malfunction; convey untreated wastewater to a temporary holding facility to prevent discharge of untreated effluent
- Providing adequate training to the effluent treatment plant (ETP) operator and ensure the ETP is operated and maintained as per the recommended operating criteria (such as design flow) and standards
- Stop sludge bulking and overflow through adequate desludging and other management techniques
- Analyse treated wastewater for its compliance before its final discharge
- Consider having separate treatment facilities for toxic/chemically contaminated wastewater streams (e.g. wastewater from bottle washers contaminated with detergents or other chemicals)
- Engage in active consultation/engagement with local communities, regulators and NGOs to address water concerns in the region
- Adequately treat the industrial wastewater and find alternative applications for the treated wastewater, e.g. irrigation, horticulture or as a raw water resource for other local industry
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