Department of civil Engineering, Vel Tech, chennai
Online published on 22 April, 2015.
Biogas is a renewable energy, which can be produced by sludge coming from different industrial waste water treatment plant. Particularly, dairy industry sludge does not contain any heavy metal. So biogas production is easier and it can be produced by anaerobic biodegradability assay method. Because of long retention time the sludge should be pretreated. One of the easiest, simplest and cost reduction methods is thermal pretreatment. The aim of this study is to explore the effect of thermal pretreatment of dairy sludge for the production of biogas by anaerobic biodegradability assay method. In this study first, the physical, chemical parameters of sludge were analyzed. After that sludge is pretreated at different temperature (100–220°C) at different time interval (0–30 min) with the key parameters of TSS, SCOD the optimum temperature can be determined. The optimum temperature can be taken for anaerobic biodegradation depends based on the thermophilic range. In the optimum temperature range final physical, chemical parameters of sludge were analyzed. Finally anaerobic degradation of Dairy sludge will be conducted by active inoculums (cow dung). After by anaerobic decomposition, the generation of biogas can be measured. In the same way biogas production in the untreated sludge will be measured. The optimum temperature range for the TSS and SCOD are 180°C. The biogas production from the untreated, thermally pretreated sludge is 78mg/l, 123 mg/l. The maximum biogas production obtained in the optimum temperature range i.e., 180°C and also I hope that the thermal pretreatment of dairy sludge will enhance the biogas production. This gas can be used for any purpose
Thermal pretreatment, Biodegradation, Biogas
