Wu Peng, Xu Lezhong, Wang Jianfang, Huang Zhenxing, Zhang Jiachao, Shen Yaoliang
School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
School of Environmental and Civil Engineering, Jiangnan University, Wuxi, 214122, China.
Appl Biochem Biotechnol. 2015 Nov;177(5):1003-12. doi: 10.1007/s12010-015-1855-0. Epub 2015 Sep 28.
A pilot-scale combined process consisting of an anaerobic baffled reactor (ABR) and an aerobic membrane bioreactor (MBR) for the purpose of achieving easy management, low energy demands, and high efficiencies on nutrient removal from municipal wastewater was investigated. The process operated at room temperature with hydraulic retention time (HRT) of 7.5 h, recycle ratio 1 of 200%, recycle ratio 2 of 100%, and dissolved oxygen (DO) of 1 mg/L and achieved good effluent quality with chemical oxygen demand (COD) of 25 mg/L, NH4 (+)-N of 4 mg/L, total nitrogen (TN) of 11 mg/L, and total phosphorus (TP) of 0.7 mg/L. The MBR achieved partial nitrification, and NO2 (-)-N has been accumulated (4 mg/L). Efficient short-cut denitrification was occurred in the ABR with a TN removal efficiency of 51%, while the role of denitrification and phosphorus removal removed partial TN (14%). Furthermore, nitrogen was further removed (11%) by simultaneous nitrification and denitrification in the MBR. In addition, phosphorus accumulating organisms in the MBR sufficiently uptake phosphorus; thus, effluent TP further reduced with a TP removal efficiency of 84%. Analysis of fluorescence in situ hybridization (FISH) showed that ammonia oxidizing bacteria (AOB) and phosphorus accumulating organisms (PAOs) were enriched in the process. In addition, the accumulation of NO2 (-)-N was contributed to the inhibition on the activities of the NOB rather than its elimination.
研究了一种中试规模的组合工艺，该工艺由厌氧折流板反应器（ABR）和好氧膜生物反应器（MBR）组成，旨在实现易于管理、低能源需求以及高效去除城市污水中的营养物质。该工艺在室温下运行，水力停留时间（HRT）为7.5小时，回流比1为200%，回流比2为100%，溶解氧（DO）为1mg/L，出水水质良好，化学需氧量（COD）为25mg/L，氨氮（NH4(+)-N）为4mg/L，总氮（TN）为11mg/L，总磷（TP）为0.7mg/L。MBR实现了部分硝化，亚硝酸盐氮（NO2(-)-N）得以积累（4mg/L）。ABR中发生了高效的短程反硝化，TN去除效率为51%，而反硝化和除磷作用去除了部分TN（14%）。此外，MBR中通过同步硝化反硝化进一步去除了氮（11%）。另外，MBR中的聚磷菌充分吸收磷，因此出水TP进一步降低，TP去除效率为84%。荧光原位杂交（FISH）分析表明，该工艺中氨氧化细菌（AOB）和聚磷菌（PAO）得到了富集。此外，NO2(-)-N的积累是由于对亚硝酸盐氧化菌（NOB）活性的抑制而非其消除。
