Zero Liquid Discharge (ZLD)
Process :
Zero Liquid Discharge (ZLD) describes a process that completely eliminates liquid discharge from a system. The goal of any well-designed ZLD system is to minimize the volume of waste water that requires treatment, process waste water in an economically feasible manner, while also producing a clean stream suitable for reuse elsewhere in the facility.
![zld-vapco-engineers-belapur-mumbai-india](https://vapcoengineers.com/wp-content/uploads/2021/03/zld-vapco-engineers-belapur-mumbai-india1.jpg)
Zero Liquid Discharge (ZLD) Need
Interest in ZLD technology has grown in the industrial manufacturing sector
over the past decade. Companies are exploring to ZLD because
- Stringent waste water disposal regulations
- Company mandated green initiatives
- Public perception of industrial impact on the environment
- Concern over the quality & quantity of the water supply.
Typical Waste Streams
Waste water treatment reject typically from Reverse Osmosis (RO) or Ion Exchange
Cooling Tower & Boiler Blow Down
Spent Coolants
DI Regenerant
Metal Finishing Waste waters
Tank or Equipment Washing Waste Waters
Spent Work & Effluents From Distilleries
![vapco-engineers-belapur-mumbai-india-zld-img](https://vapcoengineers.com/wp-content/uploads/2021/05/vapco-engineers-belapur-mumbai-india-zld-img.png)
Vapco’s Approach
- Cost effective, time-tested equipment that makes it economically feasible for even moderately sized waste streams.
- Core of ZLD revolves around evaporation as it has always been “hands off” than other waste water treatment methods.
- Capabilities of handling wider range of waste streams compared to membranes and traditional physical / chemical treatment methodologies.
- Better efficiency in concentrating waste streams compared to other methods, thereby yielding a lower cost for disposal.
![zero-liquid-discharge-plants-vapco-engineers-belapur-mumbai-india](https://vapcoengineers.com/wp-content/uploads/2021/05/zero-liquid-discharge-plants-vapco-engineers-belapur-mumbai-india1.png)
- Outlet streams from evaporation i.e. concentrated syrups & process condensate can further be treated in order to achieve complete ZLD system.
- Condensate obtained can be reused in process or in cooling tower as make up water thereby reducing fresh water requirements.
- Drying of syrups or rejects generated, through multiple options to reduce final effluent volumes or gain valuable by products.