Ammonia Removal of Chicken Manure by Vacuum Stripping Technique for Sustainable Biogas Production in Chicken Farm
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Abstract
The objective of the research was to examine how the temperature, agitation rate, and duration of pretreatment process of chicken manure (CM) affect the efficacy of ammonia removal and biogas production. The CM was pretreated through vacuum thermal stripping in various conditions and subsequently anaerobic digested using biochemical methane potential (BMP) test. The findings indicated that vacuum thermal stripping technique was successful in removing ammonia from the CM. However, the potential for ammonia removal was also influenced by the conditions used in the pretreatment process. Pretreatment at 120°C with agitation at 50 rpm for 4 hr showed the highest ammonia removal (68.69%), which was significantly greater than pretreatment at 50°C and 85°C (23-44%). However, pretreatment at high temperature could lower biogas yield of pretreated CM samples. The biogas yield of CM sample pretreated at 120°C (272-277 NmL/gVSadded) was lower than that of pretreatment at 50°C and 85°C (484-517 NmL/gVSadded). When using the vacuum thermal stripping technique for application in biogas system, it is important to ensure that the conditions are appropriate for both removing ammonia and producing biogas.
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References
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