CHEN Ru-yong,ZHANG Xiao-xia,ZHOU Jia-zhong,et al.Practical Application Effect of Retrofitted MSBR into Three-stage A/O-MBBR Continuous Flow Process[J].China Water & Wastewater,2021,37(14):108-114.
MSBR改为三级A/O-MBBR连续流工艺的应用效果
- Title:
- Practical Application Effect of Retrofitted MSBR into Three-stage A/O-MBBR Continuous Flow Process
- Keywords:
- MBBR; MSBR; three-stage A/O process; suspended carrier; biofilm; nitrifying bacteria
- 摘要:
- 浙江某污水处理厂原采用MSBR工艺，为强化处理效果，拟将其改造为三级A/O-MBBR连续流工艺。改造后出水COD、BOD5、氨氮、TN和TP的均值分别为27.8、5.4、0.41、7.16和0.04 mg/L，稳定达到一级A标准；TN在一级缺氧区、二级缺氧区、三级缺氧区的去除率分别为43.9%、29.2%、10.5%；在温度为25 ℃、填充率为25%的情况下，悬浮载体的容积负荷达到0.114 kgN/(m3·d)，生物量达到15.75 g/m2；悬浮载体上硝化菌相对丰度23.02%，是活性污泥中硝化菌相对丰度的16倍；Hyphomicrobium属在悬浮载体生物膜和污泥中的相对丰度分别为4.90%和6.61%，与进水中工业废水组分相关。改造工程总投资为8 497.93万元，改造后电耗为0.610 kW·h/m3、药剂费约0.9 元/m3。
- Abstract:
- In order to enhance the effect of a wastewater treatment plant in Zhejiang Province, the original process of modified sequencing batch reactor (MSBR)is retrofitted into continuous flow process including three-stage A/O and moving-bed biofilm reactor (MBBR). After retrofitting, the average effluent COD, BOD5, NH4+-N, TN and TP were 27.8, 5.4, 0.41, 7.16 and 0.04 mg/L, respectively and reached the first level A standard steadily.TN removal efficiencies were 43.9%, 29.2% and 10.5%, respectively in the three stage anoxic zones. The volumetric load rate of suspended carrier was 0.114 kgN/(m3·d) with the filling rate of 25% at 25 ℃ and the biomass was 15.75 g/m2. The relative abundance of nitrifying bacteria on suspended carrier was 23.02%, 16 times of that in activated sludge. The relative abundances of Hyphomicrobium in suspended carrier and activated sludge were 4.90% and 6.61%, respectively, which was related to the components of industrial wastewater in the influent. The total investment of the project is 84.979 3 million yuan with power consumption of 0.610 kW·h/m3 and chemical cost of about 0.9 yuan/m3.
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