EFFECT OF TOTAL SOLIDS CONTENT ON BIOGAS PRODUCTION IN A FAMILY SCALE BIOGAS DIGESTER

Document Type : Original Article

Authors

1 Assist. Prof., Agric. and Biosystems Eng. Dept., Fac. of Agric. (El-Shatby), Alexandria University, Egypt.

2 Researcher, Ag. Eng. Res. Inst., Ag. Res. Center, Dokki, Giza, Egypt.

Abstract

Anaerobic digestion is a biological degradation process used to convert organic wastes from Animals and plants into biogas. Produce biogas from these wastes gives a new and clean energy and good organic fertilizer as a method to protect environment from pollution by wastes.  In this paper, a continuous flow family scale biogas digester was designed and constructed in Abiss, Alexandria governorate at the year of 2011. The study was conducted to develop biogas digester for farmer family scale. It was designed with installed capacity of cattle dung from 5 to 6 heads or about 100.0 kg/dung/day.   The digester was operated in mesophilic conditions of 22 to 27 °C temperature range at three levels of average total solid content (TS) 6 %, 10 % and 17 % under one month hydraulic retention time (HRT) for each treatment.  The experiments were conducted to investigate the production of biogas (BP) rate from Cattle wastes by using anaerobic digestion process.  The results indicated that, the biogas production rate was about 3 m3/day at average total solids of 10 % with methane content (MC) of 77 % and it was about 1.85, and 2.33 m3/day at average total solids of 6 % and 17 % with methane content of 58 and 71 % respectively.   The digester showed stable performance with highest biogas production (3 m3/day) and yield (0.43 Liter gas/Liter of volume/day) with volatile solids (VS) reduction of around 90% during loading rate (LR) of 21 kg VS/day.

Main Subjects

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