Key Laboratory of Yangtze Water Environment of Ministry of Education, State Key Laboratory of Pollution and Resource Reuse, Tongji University, Shanghai 200092, China.
Waste Manag. 2012 Jan;32(1):137-43. doi: 10.1016/j.wasman.2011.09.015. Epub 2011 Oct 5.
The effect of ammonia inhibition was evaluated during the enhanced anaerobic treatment of digested effluent from a 700m(3) chicken-manure continuous stirred tank reactor (CSTR). A 12.3L internal circulation (IC) reactor inoculated with an anaerobic granular sludge and operated at 35±1°C was employed for the investigation. With a corresponding organic loading rate of 1.5-3.5kg-COD/m(3)d over a hydraulic retention time of 1.5d, a maximum volumetric biogas production rate of 1.2m(3)/m(3)d and TCOD (total COD) removal efficiency ranging from 70% to 80% was achieved. However, the continual increase in the influent TAN content led to ammonia inhibition in the methanogenesis system. The SCOD/TAN (soluble COD/total ammonia nitrogen) ratio was presented to be the key controlling factor for the anaerobic treatment of semi-digested chicken manure, and further validation through shock loading and ammonia inhibition experiments was conducted. The threshold value of the SCOD/TAN ratio was determined to be 2.4 (corresponding to a TAN of 1250mg/L) at an influent pH of 8.5-9.
采用接种厌氧颗粒污泥的 12.3L 内循环（IC）反应器，在 35±1°C 下进行试验，考察了增强型厌氧处理 700m(3)鸡粪连续搅拌槽式反应器（CSTR）消化液过程中氨抑制的效果。在水力停留时间为 1.5d 时，相应的有机负荷率为 1.5-3.5kg-COD/m(3)d，最大体积产沼气率为 1.2m(3)/m(3)d，总 COD（TCOD）去除效率在 70%-80%之间。然而，进水 TAN 含量的持续增加导致了产甲烷系统中的氨抑制。SCOD/TAN（溶解性 COD/总氨氮）比被提出是半消化鸡粪厌氧处理的关键控制因素，并通过冲击负荷和氨抑制实验进行了进一步验证。当进水 pH 值为 8.5-9 时，SCOD/TAN 比的阈值确定为 2.4（对应 TAN 为 1250mg/L）。
