Impact of AnMBR operating conditions on anaerobic digestion of waste activated sludge
Impact of AnMBR operating conditions on anaerobic digestion of waste activated sludge
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AnMBR运行条件对废弃活性污泥厌氧消化的影响
DOI：
10.1002/wer.1361
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发表时间：
2020
影响因子：
3.1
通讯作者：
W. Parker
中科院分区：
文献类型：
--
作者：
M. Dagnew;W. Parker
在中试厌氧膜生物反应器（AnMBR）和常规厌氧消化器（CD）中，比较了固体停留时间（SRT）和水力停留时间（HRT）对浓缩废活性污泥（TWAS）厌氧消化的影响。AnMBR能够成功地消化市政TWAS在HRT范围从7到15天，SRT范围从15到30天。在AnMBR中增加SRT导致在COD和VS去除效率显着改善相比，在相同的水力停留时间对CD操作。在相同的SRT，但更长的HRT下，在AnMBR中观察到的VS和COD的破坏（35%-50%）类似于在CD中观察到的那些。在升高的SRT/HRT比率下操作导致产生增稠的生物固体（2%-3%TS）。在15-30、7-30和7-15的HRT-SRT比率下操作的AnMBR的比甲烷生产值分别为0.19、0.19和0.14 m3 CH 4/kg进料的COD，显示出随着SRT的甲烷生产增加25%。基于使用一级动力学描述生物可降解固体水解的模型能够描述VS破坏作为SRT的函数。
The impact of solids retention time (SRT) and hydraulic retention time (HRT) on anaerobic digestion of thickened waste activated sludge (TWAS) in a pilot‐scale anaerobic membrane bioreactor (AnMBR) was compared with that achieved in conventional anaerobic digestions (CD). The AnMBR was able to successfully digest municipal TWAS at HRTs ranging from 7 to 15 days and SRTs ranging from 15 to 30 days. Increasing SRT in the AnMBR resulted in a significant improvement in COD and VS removal efficiency when compared against CD operating at the same HRT. The VS and COD destructions (35%–50%) observed in the AnMBR were similar to those observed in CD operating at the same SRT but longer HRTs. Operation at elevated ratios of SRT/HRT resulted in the production of a thickened biosolid (2%–3% TS). Specific methane production values for AnMBR operating at HRT‐SRT ratios of 15–30, 7–30, and 7–15 were 0.19, 0.19, and 0.14 m3 CH4/kg of COD fed, respectively, showing a 25% increase in methane production with SRT. A model based upon describing hydrolysis of biodegradable solids using first‐order kinetics was able to describe VS destruction as a function of SRT.