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 14):108-114.
Practical Application Effect of Retrofitted MSBR into Three-stage A/O-MBBR Continuous Flow Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
14 14
Page:
108-114
Column:
Date of publication:
2021-07-17
- Keywords:
- MBBR; MSBR; three-stage A/O process; suspended carrier; biofilm; nitrifying bacteria
- 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.
Last Update:
2021-07-19