Abstract
The study was investigated to enhance biogas production from rumen digesta by anaerobic co-digestion process. The experiment was carried out in 3300 mL digester. The mixing ratio of rumen digesta and water used was 1:1 in 40 days Hydraulic Retention Time (HRT). Produced gas was measured by volumetric water replacement method. In phase-1, the maximum biogas generation from digesta of chicken and goat, cow and chicken, cow and goat, and co-digestion of four substrates (C:CH:G:V) were 65, 1230, 37 and 375 mL/d at 17th, 14th, 26th and 13th day respectively. The average biogas production was found from these samples were 20, 340, 16 and 113 mL. In phase-2, the maximum biogas generation from cow, goat and chicken, cow, chicken and vegetable waste and cow, goat and vegetable waste were respectively 66, 80 and 64 ml/d at 19th, 23rd and 27th day. The average biogas generation were found from these samples 22, 32 and 19 mL. The comparative data shows, biogas production is higher with cow and chicken wastes in both the phases mixed with vegetable waste. Thus, it is suggested that the study which gave maximum yield of biogas production from co-digestion process might be met the future energy demand. Â
Highlights
On the last decades, anaerobic digestion is used as a process to treat organic solid wastes became more and more frequent
The reason of this new tendency for the treatment of solid wastes can be explained considering mainly three factors [1,2,3]: i) the need to apply a process to the disposal of organic solid wastes more environmental friendly than landfills as requested by the latest rules concerning the environmental protection in many countries in the world; ii) the opportunity to obtain a renewable fuel called biogas from this process is an alternative to fossil ones; iii) the advantage of this process is relatively low costs in starting up and management
This study shows that the production of biogas from cow and chicken digesta was more than chicken and goat digesta
Summary
Anaerobic digestion is used as a process to treat organic solid wastes became more and more frequent. Disposal system of rumen waste may create environmental pollution, result in health hazard to human due to the presence of millions of microorganisms and causes water pollution by entering into rivers, streams and other local sources It is responsible for greenhouse effect because of conversion into methane and carbon dioxide. There are few remarkable studies on enhancement of bio-methane production from rumen digesta by co-digestion process. Sunarso et al studied on the effect of rumen fluid of animal ruminant to increase biogas production from cattle manure at mesophilic condition [21]. This study focusses on enhancement of bio-methane production as a renewable energy source by co-digestion process of rumen waste with kitchen waste to control environmental pollution
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