Biomethanation of poultry litter leachate in UASB reactor coupled with ammonia stripper for enhancement of overall performance

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• 作者：A. Gangagni Rao ; T. Sasi Kanth Reddy ; S. Surya Prakash ; J. Vanajakshi ; Johny Joseph ; Annapurna Jetty ; A. Rajashekhara Reddy ; P.N. Sarma
• 关键词：Poultry leachate ; Ammonia stripper ; UASB reactor ; TAN ; FAN
• 刊名：Bioresource Technology
• 出版年：2008
• 出版时间：December 2008
• 年：2008
• 卷：99
• 期：18
• 页码：8679-8684
• 全文大小：308 K

文摘

In the present study possibility of coupling stripper to remove ammonia to the UASB reactor treating poultry litter leachate was studied to enhance the overall performance of the reactor. UASB reactor with stripper as ammonia inhibition control mechanism exhibited better performance in terms of COD reduction (96 % ), methane yield (0.26 m³ CH₄/kg COD reduced), organic loading rate (OLR) (18.5 kg COD m⁻³ day⁻¹) and Hydraulic residence time (HRT) (12 h) compared to the UASB reactor without stripper (COD reduction: 92 % ; methane yield: 0.21 m³ CH₄/kg COD reduced; OLR: 13.6 kg COD m⁻³ day⁻¹; HRT: 16 h). The improved performance was due to the reduction of total ammonia nitrogen (TAN) and free ammonia nitrogen (FAN) in the range of 75–95 % and 80–95 % , respectively by the use of stripper. G/L (air flow rate/poultry leachate flow rate) in the range of 60–70 and HRT in the range of 7–9 min are found to be optimum parameters for the operation of the stripper.