Due to its high-water use, the dairy business is one of the most environmentally damaging of all food industries. One of the main industries contributing to water contamination is dairy. Given the rising demand for milk, the dairy industry in India is predicted to expand quickly, and waste generation and associated environmental issues, are also given more weight.
The dairy business may perform a number of activities, such as pasteurisation, cream, cheese, milk powder, etc. When released to the surface of the land or water, poorly treated wastewater with high levels of contaminants produced by treatment systems, causes significant environmental issues.
Effluent treatment plant for dairy industry
For every litre of milk produced, approximately 2.5 litres of effluent are produced. A by-product mostly produced in the cheese industry, is the principal pollutant in wastewater from milk processing.
Due to its high organic and nutrient loading, dairy processing has a significant negative influence on the environment. Extreme pH variations and large volumes of dairy effluent cause a variety of pollution issues, such as rapid dissolved oxygen depletion because of the high organic loading, which causes anaerobic conditions, the release of volatile toxic substances, the extinction of aquatic life, and ensuing environmental harm.
Characteristics of dairy effluent
While, the industry produces milk, butter, or cheese, it also produces large quantities of BOD (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand), which need to be treated before being released into the environment. Other typical effluents include milk fat, suspended particles, and dairy-related smells that must be controlled.
Such a dairy effluent treatment plant is necessary for every dairy production facility, in order to effectively address the uneven levels of BOD, COD, suspended, and dissolved solids, and enable the safe disposal of industrial waste.
ETP Treatment Units for dairy industry
- Skimmer Tank
- Tank for Equalization
- Aeration Tank
- Settling Tank
- Oxidation Tank
Treatment Steps in dairy effluent treatment plants
The effluent from the numerous point sources is gathered in a combined subterranean sewer, transported to the effluent tank, where it is equalised before being fed into the following units. The effluent goes via the skimming tank, which is an oil and grease separator, and then is split in two and goes through the aeration tank. The combined aeration tank effluent travels into the oxidation ditch. The oxidation ditch’s cleaned effluent is either released into the sewer system or used for gardening purposes.
Steps in dairy effluent treatment plant are as follows:
- Using pH controllers like caustic or acid, the pH level is initially raised to 8.5. Any emulsions are later broken down, and solids are made to precipitate with the aid of a de-emulsifier.
- Dissolved air flotation and flocculation are two additional crucial phases in the treatment of dairy effluent. The wastewater is cleaned further using the air flotation process, by being flocculated into a slow mix zone, where the smaller particles are aggregated into larger ones.
- The Air Dissolving system blows the treated effluent, pressurises it, and dissolves it using air. This is how the Dissolved Air Flotation process operates.
- The batch of sludge is then discharged in accordance with environmental laws, after being pumped through the filter press or by passing it through membrane processes.
As a result of the Effluent Treatment System created especially for the dairy industry, less money is spent on operations, the dairy operations run smoothly, while environmental standards are met.
Here are some noteworthy aspects of our dairy wastewater treatment facility:
- Water use can be reduced and cooling water can be managed for reuse, with careful chemical application.
- Nozzles can be installed that are high pressure, which restrict water usage and ensure saving every drop of water.
- Effluent can be made into treated water with processes like membrane separation and absorption, after which water is safe to reuse.
- Our effluent treatment plants for dairies can also collect effluents from processing systems, sanitary installations, and even from condensation systems, resulting in proper wastewater treatment for better reuse.
About Netsol Water Solutions
With clients from all around the country, Netsol Water Solutions have more than a decade of experience. Our environmental services encompass the idea of commissioning effluent treatment plants for dairy industries. Contracts for sewage/wastewater treatment plant operation and maintenance, installation of the entire plant under construction, environmental impact assessment studies, environmental audits, water supply and sewage system designs for the townships, environmental management planning, and disposal structure designs, are all included.
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