YANG Ping,ZHOU Jia-zhong,GUAN Yong-jie,et al.Comparison of AAO and Bardenpho Processes Transformation Effect Based on MBBR[J].China Water & Wastewater,2021,37(7):11-19.
基于MBBR的AAO和Bardenpho工藝改造效果對比
- Title:
- Comparison of AAO and Bardenpho Processes Transformation Effect Based on MBBR
- 關(guān)鍵詞:
- 移動床生物膜反應(yīng)器; AAO工藝; Bardenpho工藝; 脫氮; 懸浮載體; 持續(xù)升級
- Keywords:
- MBBR; AAO process; Bardenpho process; nitrogen removal; suspended carrier; continuous upgrading
摘要:- 移動床生物膜反應(yīng)器（MBBR）是一種高效的生物脫氮工藝，是污水廠提標(biāo)改造的主流工藝之一。通過北方某污水廠的持續(xù)升級改造工程，分析了基于MBBR的AAO和Bardenpho工藝（分別記作MBBR-AAO工藝、MBBR-Bardenpho工藝）的實際運行效果。MBBR-AAO工藝和MBBR-Bardenpho工藝的實際硝化能力分別為0.158、0.208 kg/(m3·d)，遠(yuǎn)高于活性污泥法，而且MBBR-Bardenpho工藝的抗沖擊能力更強、出水水質(zhì)更穩(wěn)定；兩種工藝的出水TN濃度分別為（20.9±3.8）、（7.4±2.3） mg/L，對TN的去除率分別為71.4%和88.8%。MBBR-Bardenpho工藝可使出水TN低于12 mg/L，達(dá)到地表準(zhǔn)Ⅳ類水質(zhì)標(biāo)準(zhǔn)，在TN去除方面優(yōu)勢突出。沿程測定結(jié)果顯示，MBBR-Bardenpho工藝通過增加后置缺氧區(qū)，可使好氧區(qū)出水TN進一步降低，大大提高了生化池對TN的去除效果。懸浮載體和活性污泥的高通量測序結(jié)果顯示，懸浮載體對硝化菌的富集能力較強，相對豐度超過10%，主要起硝化作用；而活性污泥中反硝化菌的相對豐度較高，主要起反硝化作用。兩種工藝的生化池占地分別為0.162、0.136 m2/(m3·d-1)，基于MBBR的優(yōu)勢，均可再次提標(biāo)提量，噸水占地將進一步降低。兩種工藝均有良好的除污效果，其中，MBBR-AAO工藝主要適用于常規(guī)濃度進水的一級A達(dá)標(biāo)污水廠，而MBBR-Bardenpho工藝適用于出水水質(zhì)要求達(dá)到地表準(zhǔn)Ⅳ類及以上標(biāo)準(zhǔn)的污水廠。
Abstract:- Moving bed biofilm reactor (MBBR) is an efficient biological nitrogen removal process, which is one of the most popular processes in the upgrading of wastewater treatment plant (WWTP). Based on the continuous upgrading of a WWTP in North China, actual operational performance of AAO and Bardenpho processes coupled with MBBR (named as MBBR-AAO process and MBBR-Bardenpho process, respectively) were analyzed. The nitrification capacities of MBBR-AAO and MBBR-Bardenpho processes were 0.158 kg/(m3·d) and 0.208 kg/(m3·d), respectively, which were much higher than that of the activated sludge process. Moreover, the MBBRBardenpho process had a stronger impact resistance and more stable effluent. TN concentrations in the effluent of the two processes were (20.9±3.8) mg/L and (7.4±2.3) mg/L, respectively, and their removal rates were 71.4% and 88.8%, respectively. The TN concentration in the effluent of the MBBR-Bardenpho process could be lower than 12 mg/L, which met the quasi class Ⅳ surface water standard and had an outstanding advantage in TN removal. The water quality analysis results along the process showed that, MBBR-Bardenpho process could further reduce the TN concentration in the effluent of the aerobic zone by adding an anoxic zone, which greatly improved the TN removal efficiency of the biochemical tank. Microbial communities of suspended carriers and activated sludge were detected by high-throughput sequencing. The suspended carriers had stronger enrichment ability for nitrifying bacteria, in which nitrifying bacteria was mainly responsible for nitrification and their relative abundance was more than 10%. However, relative abundance of denitrifying bacteria in activated sludge was higher than that in suspended carriers, and they were mainly responsible for denitrification. Footprints of the MBBR-AAO and MBBR-Bardenpho processes were 0.162 m2/(m3·d-1) and 0.136 m2/(m3·d-1), respectively. Based on the advantages of MBBR, the effluent standard can be further improved and the footprint per ton of water will be further reduced. Both processes can achieve good pollutants removal efficiency, in which MBBR-AAO is mainly applicable to WWTPs with conventional low substrate influent which meets the first level A standard, while Bardenpho process is suitable for WWTPs with effluent requirements of quasi class Ⅳ surface water standard and stricter standards.
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