低温下ABR酸化反应器的运行效果及微生物活性研究

The performance of anaerobic baffled reactor and microorganism activity at low temperatures

考察了低温对四格室ABR酸化反应器性能的影响。在水力停留时间3h，进水COD浓度230～300mg／L，TP浓度1．59～1．93mg／L，NH4-N浓度23～28mg／L，进水温度8-15℃，酸化出水温度3～9℃条件下，溶解性COD最高去除率达56％。沿流程方向反应器前面2个格室的COD净去除量占总去除量的64％，明显高于后面2个格室，去除率也有相似特征。反应器不同格室的挥发性悬浮固体（VSS）浓度也明显不同，前面格室的VSS高于后面格室。造成不同格室COD降解差异的主要原因为生物量不同所致，高生物量对应着高COD去除量和去除率。沿水流方向不同格室中微生物INT脱氢酶活性（DHA）呈递减趋势，前面2个格室的微生物活性明显高于后2个格室。营养物水平不同，微生物活性不同，高营养对应着高活性，高活性对应着高COD去除率。

The effect of low temperature on the performance of anaerobic baffled reactor （ABR） running at acidogenic phase with four compartments was inspected. Under the conditions of hydraulic retention time （HRT） 3 hours,influent chemical oxygen demand （COD） 230 -300 mg/L,total phosphorous （TP） 1.59 - 1.93 mg/L, ammonia nitrogen （NH4-N） 23 - 28 mg/L,influent temperature 8 - 15 ℃ , effluent temperature 3 - 9 ℃ , soluble COD removal was up to 56%. Net COD removal amount in the first two compartments made up 64% of total COD removal, which was higher than that of the other two compartments. COD removals had the same feature. The volatile suspended solid （VSS） concentrations were different in different compartments, the first two compartments had higher VSS concentration. COD removal difference was caused by different biomass in the compartments, higher biomass corresponded to higher COD removal. Acidification INT dehydrogenase activity （DHA） had the trend of decreasing with the compartments along flow direction. Different nutrients corresponded to different INT-DHA, higher the nutrients concentration corresponded to higher microorganism INT-DHA and higher COD removal.