SWACHH BHARAT ABHIYAN
Environment and Energy Efficiency Research Wing (E & EE RW), headed by Prof. Dr. N. S. Varandani, of Gujarat Energy Research and Management Institute (GERMI), Gandhinagar has conceptualized the Total Waste Management (TWM) System for individual rural house (s) as a step towards satisfying Nation’s desire to improve the Quality of Life of rural people through effective waste management at domestic and community level.
The developed system not only treats liquid and solid waste at the domestic level but also generates biogas to partially satisfy the cooking needs of the family. It is believed that the designed system, when operated effectively, will help solve the waste disposal problem which otherwise is not tackled effectively. The proposed system is directly related to this.
BRIEF PROCESS DESCRIPTION:
The entire treatment plant essentially comprises of four tanks, made up of prefabricated LLDPE/HDPE, namely - biogas chamber, settler, sand filter and treated water storage tank as shown in fig. No.1. The purpose of each component is briefly described hereunder:
The biogas chamber:
The sewage from the toilet is brought by gravity to the anaerobic digester. i.e. biogas plant . The food waste from the kitchen is shredded and mixed with water in the ratio of 1:1 to form the slurry, which is also added to the biogas plant. The organic content of the feed undergo anaerobic digestion which results in generation of biogas.
The over flow from the biogas plant enters the settling tank, where the settleable solids are removed. The discharge from bathrooms and wash area can be directly led to the settling tank for the purpose. It is optional in case of no water from bathrooms and wash area.
The over flow from the settling tank is loaded to sand filter at the top to remove carry over suspended solids. The filtered water is collected at the bottom and taken to treated water storage tank.
Depending on the final utilization of treated water, volume sufficient to hold it for specified time is provided.
^ Schematic Line diagram for Total Waste Management at Domestic Level
ARRANGEMENT OF THE TANKS:
The four component tanks can either be placed independently or can be incorporated in one single tank as per the site conditions and requirement.
For the explanatory drawing indicating plant components and related hydraulic flow
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