Introduction to Zero Liquid Discharge (ZLD) System
Purewater Expert’s Zero Liquid Discharge (ZLD) system is an advanced wastewater treatment solution designed to treat and recycle nearly all of the wastewater produced by industrial and municipal applications. This sustainable process ensures no effluent or discharge is released into the environment, saving both water and costs. The water recovered from wastewater is reused, while the residual solids, salts, and impurities are safely disposed of in landfills.
Product Description
Zero Liquid Discharge is a comprehensive wastewater treatment approach combining various technologies, including ultrafiltration, reverse osmosis, and evaporation/crystallization. This method allows industries to comply with stringent discharge regulations while promoting water reuse. ZLD systems involve the full recovery of water from wastewater that would otherwise be discarded. The end result is purified water that can be reused within the industrial process, reducing the need for fresh water intake
Functionality
ZLD systems utilize membrane technology, such as ultrafiltration and reverse osmosis, to treat wastewater. Pre-concentration through membrane systems reduces the requirement for subsequent evaporation units, optimizing the system’s capital and operating costs. Pre-treatment methods like softening and pH adjustment are often necessary for high recovery rates in membrane systems. A combination of sedimentation, dissolved air flotation, biological treatment, media filtration, activated carbon filtration, and ultrafiltration ensures that the coarse particles, colloidal materials, and organic matter are effectively removed. In the final stage, reverse osmosis further purifies the water, ensuring that all dissolved solids and metals are extracted.
Feature
- Compact, easy-to-install design
- High steam economy and energy efficiency
- Minimal maintenance requirements
- Robust, durable construction
Advantages
Purewater Expert’s ZLD systems are ideal for industries that generate significant wastewater, including:
- Distilleries
- Chemical manufacturing
- Textile and pharmaceutical industries
- Sugar mills
- Oil and gas production
- Pulp and paper industries
PLANTS WE OFFER
Frequently Asked Question
ZLD is an advanced water treatment method aimed at recycling wastewater so that no liquid discharge is released into the environment. It is commonly used in sectors such as power generation, chemical manufacturing, and oil and gas
The system employs a combination of filtration, evaporation, and crystallization to remove contaminants from wastewater. The clean water is recycled, and the solids are disposed of according to environmental standards
The ZLD system helps industries reduce water usage, ensure regulatory compliance, and eliminate wastewater disposal costs. It also prevents pollutants from being discharged into the environment
Industries that produce large volumes of wastewater, including power plants, chemical manufacturers, oil and gas producers, and semiconductor industries, find ZLD systems particularly beneficial.
The process includes pretreatment to remove larger contaminants, followed by membrane filtration (ultrafiltration and reverse osmosis), evaporation, and crystallization.