What is a zero discharge system?

What is a zero discharge system?

Zero liquid discharge (ZLD) is an ambitious wastewater management strategy that eliminates any liquid waste leaving the plant or facility boundary, with the majority of water being recovered for reuse.

What is the meaning of zero liquid discharge?

Zero liquid discharge (ZLD) is a strategic wastewater management system that ensures that there will be no discharge of industrial wastewater into the environment. It is achieved by treating wastewater through recycling and then recovery and reuse for industrial purpose.

When was the zero liquid discharge invented?

When Namon Nassef had to buy a new engine for his boat, he saw an opportunity. He could finally install the invention he had been working on, a machine he calls the Zero Liquid Discharge Sewage Elimination System (ZLD).

How do ETP plants work?

An ETP is therefore designed to remove the physical, chemical and biological materials present in the effluent. Depending on the level of treatment the wastewater requires, an ETP is divided into four different levels each designed to remove a certain type of material in the effluent.

What is MEE plant?

Multi Effect Evaporator [MEE] Multi Effect Evaporator is defined as a apparatus for efficiently using the heat from steam to evaporate water. In a multiple-effect evaporator, water is heated in a sequence of vessels, each held at a lower pressure than the last. Falling Film Evaporator. Forced Circulation Evaporator.

Does your facility have zero liquid discharge?

Certain facilities send their liquid waste off-site for treatment, deep well disposal, or incineration and they consider this to qualify as zero liquid discharge. This approach to zero liquid discharge eliminates continuous discharge of liquids to surface waters or sewers, but can significantly increase cost.

What does ETP mean?

TREATMENT. EFFLUENT. SLUDGE. • ETP (Effluent Treatment Plant) is a process design for treating the. industrial waste water for its reuse or safe disposal to the environment.

Who invented zero liquid discharge?

Although the history of tighter regulations on wastewater discharge can be traced back to the US Government’s Clean Water Act of 1972, India and China have been leading the drive for zero liquid discharge regulations in the last decade.

What is difference between ETP and STP?

Difference between Effluent treatment plant (ETP) and Sewage treatment plant (STP) STP unit removes contaminants from municipal wastewater or household sewage. 2- ETP is employed in industrial areas whereas STP cleanses household water.

What is BOD ETP plant?

BOD is a measure of the amount of oxygen required to remove waste organic matter from water in the process of decomposition by aerobic bacteria (those bacteria that live only in an environment containing oxygen). BOD is used, often in wastewater-treatment plants, as an index of the degree of organic pollution in water.

What is mee condensate?

The condensate water. generated from the MEE shall be used in process. Neutral effluent from Primary Treatment Plant is passed through 3 stages Evaporator System and the evaporated water is collected in an Evaporated Water Collection Tank and then recycled to plant after filtering through sand filter and carbon filter.

What is MEE salt?

SALT DRYER & ATFD UNIT It Is used to evaporate the residue water from MEE concentrated liquid and generate dry salt for dispose. MEE concentrated liquid have large amount of water content which is not possible to dispose so salt dryer is used after MEE to reduce water content from MEE concentrated liquid.

What is the goal of Zero Liquid Discharge?

Zero Liquid Discharge (ZLD) is a treatment process that its goal is to remove all the liquid waste from a system.

Where are zero discharge technologies currently in use?

Zero Discharge Technologies’ systems are currently in use internationally with systems operating in China, Taiwan, England, India, and the United States. Electrodialysis is electrically driven ion-exchange utilizing u0003alternating sequences of cation membranes and anion u0003membranes.

How does Aquatech Zero Liquid Discharge system work?

Zero liquid discharge is an advanced wastewater treatment method that includes ultrafiltration, reverse osmosis, evaporation/crystallization, and fractional electrodeionization. Aquatech Solutions for Zero Liquid Discharge

Are there any Zero Liquid Discharge plants in India?

Zero Liquid Discharge Plants in India In 2011 the government of Tamil Nadu has made ZLD to be mandate on Textile Industries and has directed the textile industry to strictly follow Zero Liquid Discharge (ZLD) norms according to which a factory should recycle all its effluents and not release even a drop into any water body.