Decentralized Wastewater Treatment System

DEWATS or decentralized wastewater treatment plants are used not only for treating municipal wastes but are also used for treating effluents in various small scale enterprises. The plant is well capable for treating waste water with high organic concentration. Due to this capability of decentralized waster water system, in different parts of the wold these systems are effectively used. Operation and maintenance cost is very low.

Industries in which these DEWATS are popularly used are

• Soybean industry
• Cow farm
• Pig farm
• Slaughter houses

Advantages

• Decentralized wastewater treatment system reduces organic loading and increase oxygen supply.
• The cost of operation and maintenance of whole decentralize wastewater treatment system is low.
• Contaminants are removed easily and efficiently.
• The system can treat water up to 1000 m³/day.

Decentralized Wastewater Treatment System uses following technology to treat wastewater.

Bio-Digester Bio-Digester are important components of the system for they not only treat wastewater with high organic content but also help in producing biogas for lighting and cooking.

Septic Tank
Septic tanks are used for treating domestic wastewater. The system generally consist of two simple compartments. Sludge is stabilize through small microorganism

Anaerobic Baffle Reactor
Here wastewater are brought in contact with activated sludge. The action of microorganism result in the removal of contaminants whereas the integrated sedimentation avoid solid particles to get into baffles.

Anaerobic Filter
There are layer of filters through which when wastewater flows removal of contaminants take place.

Horizontal Sand Filter
Horizontal sand filters employ aerobic treatment for pre-treated wastewater. They are capable of removing elements like phosphate, pathogen bacteria etc.