CAJ | 학술논문

AAO-曝气生物滤池（BAF）是污泥龄差距较大的双污泥系统，可在低C/N条件下实现氮、磷的同步去除。本试验以低碳氮比的城市污水为处理对象，研究了处理量为40～100 m3·d?1的大型中试级别的AAO-BAF脱氮除磷工艺的启动运行。通过先使AAO和BAF独立运行以分别培养驯化聚磷菌活性污泥和硝化细菌生物膜，待分别观察到AAO出水TP及BAF 出水NH4+-N浓度稳定后，再将两部分连通运行的策略，使得在第58天时系统出水COD、4NH+-N、TN、TP、浊度、SS分别小于50 mg·L?1、5 mg·L?1、15 mg·L?1、0.5 mg·L?1、5NTU、10 mg·L?1，表明该中试系统已成功启动。与小试研究比较发现，分开运行更有利于聚磷菌的培养驯化；BAF中采用自然挂膜法较接种污泥法更方便，但增加了填料挂膜的时间。根据微生物群落多样性分析，发现 AAO 中的硝化细菌丰度少于3%，而BAF生物膜上的硝化细菌的丰度占到12%以上。本试验可为该工艺的实际工程应用提供一定参考。
AAO-폭기생물려지（BAF）시오니령차거교대적쌍오니계통，가재저C/N조건하실현담、린적동보거제。본시험이저탄담비적성시오수위처리대상，연구료처리량위40～100 m3·d?1적대형중시급별적AAO-BAF탈담제린공예적계동운행。통과선사AAO화BAF독립운행이분별배양순화취린균활성오니화초화세균생물막，대분별관찰도AAO출수TP급BAF 출수NH4+-N농도은정후，재장량부분련통운행적책략，사득재제58천시계통출수COD、4NH+-N、TN、TP、탁도、SS분별소우50 mg·L?1、5 mg·L?1、15 mg·L?1、0.5 mg·L?1、5NTU、10 mg·L?1，표명해중시계통이성공계동。여소시연구비교발현，분개운행경유리우취린균적배양순화；BAF중채용자연괘막법교접충오니법경방편，단증가료전료괘막적시간。근거미생물군락다양성분석，발현 AAO 중적초화세균봉도소우3%，이BAF생물막상적초화세균적봉도점도12%이상。본시험가위해공예적실제공정응용제공일정삼고。
Anaerobic/anoxic/oxic (AAO)-biological aerated filter (BAF) is a two-sludge system with different SRT, which can remove nitrogen and phosphorus simultaneously in the low C/N condition. The startup of a pilot-scaled AAO-BAF system with capacity of 40—100 m3·d?1 used for treating real domestic sewage was studied in this experiment. The AAO and BAF run independently in order to cultivate and acclimate the phosphorus accumulating organisms (PAOs) and nitrifying bacterial biofilms, respectively. When the TP concentration of AAO effluent and4NH+-N concentration of BAF effluent were found keeping stable, the two parts were combined. With this operation strategy, the effluent concentration of COD,4NH+-N, TN, TP, NTU and SS was lower than 50 mg·L?1, 5 mg·L?1, 15 mg·L?1, 0.5 mg·L?1, 5 NTU and 10 mg·L?1 in the 58th day, respectively, indicating the successful setup of the pilot-scaled process. Comparing with the lab-scale study, the separate running had more advantage in cultivating PAOs. The formation of natural biofilm in BAF was more convenient than the method of inoculated sludge, but needed longer time. According to the analysis of microbial community diversity, the abundance of nitrobacteria was less than 3% in the AAO system, however, it was higher than 12% on the biofilm in BAF. This experiment can provide a reference for practical engineering application of the process.