Volume No. 7 Issue No.: 4A Page No.: 1489-1495 April-June 2013

 

AEROBIC-THERMOPHILIC COMPOSTING OF MUNICIPAL SOLID WASTES USING SOLAR ENERGY

 

Wadkar D. V.*, Modak P. R. 1 and Kote A. S.2

1. Department of Civil Engineering, AISSMS College of Engineering, Pune (INDIA)
2. Department of Civil Engineering, D Y Patil College of Engineering, Pune (INDIA)

 

Received on : December 10, 2012

 

ABSTRACT

 

Aerobic composting is the creation of compost that depends on bacteria that thrive in an oxygen rich environment. Thermophilic composting is breaking down biological waste with thermophilic bacteria. In this study a cylindrical Aerobic-Thermophilic Bio-reactor (ATB) was made where aeration was continuously provided with the help of a fan attached to pipe arrangement in such a way that air reached all corners of the reactor. A solar panel was connected to the fan for its working. Organic waste included dry vegetable waste collected from Municipal Solid Waste (MSW) ramp, Koregaon Park, Pune, India. Bacillus megatherium and Pseudomonas fleurescens bacteria cultures were used as they accelerate the composting process. The characteristics of compost like pH, moisture content, temperature, C/N ratio and volume reduction were studied for the period of composting 35 days (5 weeks) which was low as compared to conventional composting period (40 to 90 days). The results showed that the mature organic compost having pH near to neutral, moisture content (22.36%), volume reduction (45.43%), C/N ratio (16.520%) and phosphorous (2.2 to 2.5%). It can be concluded that these values are within the desired limits and compost is suitable for ornamental plants. The setup of ATB reactor is eco-friendly, effective and economical.

 

Keywords : Aerobic, Thermophilic, Organic waste, Bio-reactor, Composting, Solar energy, Koregaon Park, Pune

 

 

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