Sunday, 17 May 2015

Inspiration : Soil Biotechnology plant at Govardhan Eco Village



Having discussed the drawbacks of modern day sewage systems, in the last article we saw how water based sewage systems offer the advantage of easier sewage transportation, while soil based treatment systems offer effective sewage processing. Blending the advantages of both, the sewage at Govardhan Eco Village is effectively taken care of by the Soil BioTechnology plant (SBT).
SBT system consists of an impervious containment and incorporates soil, formulated granular filter media, select culture of macro organisms such as earthworms and plants. It involves a combination of physical and biological process for processing of wastewater and it derives its fundamental principle from the functioning of a terrestrial ecosystem. The process by design integrates with the natural bio-geochemical cycles of nature and hence proves to be most effective.
The combined grey and black water from all the residential facilities are collected and transported via a water based underground sewerage network to a central collection point. In the first stage the physical separation of waste is accomplished in a primary treatment unit consisting of an perforated screen and gravity-settling tank and an equalization tank. The perforated screen helps in separating the undissolved solid wastes from the waste water and allows it to pass through a settling chamber that has a sloped bottom opposite to the direction of the water flow, thus facilitating the settling of solid particulates with higher specific gravity than the waste stream. Then the water enters the open top equalization tank that allows the dissolved pollutants to be exposed to natural sterilization by sunlight and ambient air.
In this second stage the wastewater is sprayed, by means of a pump, onto a plant bed which is part of an engineered ecosystem that constitutes two bio-reactors, one for a coarse purification and the other for further refining through recycling. This ecosystem consisting of soil, bacterial culture and earthworms, mineral additives and select plants, treats the water is a combination of physio-chemical and biological processes. Purification takes place by adsorption, filtration and biological reaction. The entire waste is processed and converted into bio-fertilizer which is rich in organic content, and is being used in the plant nursery at GEV. The other useful by-product is the Biomass in the form of flower, fodder, fruit and fiber which are also completely utilized in house. Since the entire waste is converted, there are no issues like handling the wastes after treating the water, as is common in conventional chemical based sewage treatment plants. The entire process operates in aerobic mode thus eliminating the possibility of foul odor near the plant, creating a safe and serene ambiance for the people dwelling near the plant. The processed water can be reused in gardening, agriculture and also support marine life.
The SBT plant at GEV can handle up to 30,000 litres of sewage per day and operates in an 8 hour cycle daily. It can potentially produce up to 20,00,000 Tons of bio-fertilizer per year and most importantly offers an eco-friendly option to the growing menace of waste handling. If you would like to implement this technology in your village, locality, home or would like to know more about this system feel free to mail us at contactus@ecovillage.org.in

2 comments:

  1. There are different points of interest related with the bundled Packaged type sewage Treatment plant those preferences incorporate, the productivity of the plant to meet the emanating release cutoff of the predefined area, the plants are commonly very much manufactured with the high-quality, strengthened carbon steel, for realizing additionally in regards to the favorable circumstances related with the bundled type sewage treatment plants it is ideal to connect with the group specialists. The specialists can be associated for help through the site whenever from anyplace.

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