PILOT TEST OF TREATING SEWAGE FROM PUMPING STATION WITH A BIO-DIATOMITE REACTOR

CHEN Yong-kang; LU Bin; CHAI Xiao-li; CHANG Fei

doi:10.13205/j.hjgc.202012002

Volume 38 Issue 12

Apr. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(12): 6-12

CHEN Yong-kang, LU Bin, CHAI Xiao-li, CHANG Fei. PILOT TEST OF TREATING SEWAGE FROM PUMPING STATION WITH A BIO-DIATOMITE REACTOR[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(12): 6-12. doi: 10.13205/j.hjgc.202012002

Citation:

CHEN Yong-kang, LU Bin, CHAI Xiao-li, CHANG Fei. PILOT TEST OF TREATING SEWAGE FROM PUMPING STATION WITH A BIO-DIATOMITE REACTOR[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(12): 6-12. doi: 10.13205/j.hjgc.202012002

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PILOT TEST OF TREATING SEWAGE FROM PUMPING STATION WITH A BIO-DIATOMITE REACTOR

doi: 10.13205/j.hjgc.202012002

1. University of Shanghai for Science and Technology, Shanghai 200093, China;
2. Tongji University, Shanghai 200092, China

Received Date: 2019-12-09
Available Online: 2021-04-23

Abstract

Abstract

One of the main reasons for the blackness and odors of the river is the discharge pollution caused by the serious mixing of the diversion drainage system. An integrative bio-diatomite bioreactor was developed based on A₁/O₁/A₂/O₂ process and powdery microorganism technology. The removal efficiency of pollutants in the water was studied under different operation conditions, taking the intercepted sewage of pumping station with great fluctuation of water quality as raw water. Furthermore, we also compared the difference in microbial community structure for dry-weather sewage and wet-weather sewage treatment, respectively. When the concentration of diatomite was 3 g/L, the results indicted that the optimal operation conditions for dry-weather sewage treatment when the inlet sewage flow was 1.5 m³/h were as follows: the DO in the O₁ tank between 1.5~2.5 mg/L, internal reflux of 50% and external reflux of 100%, the treated water reached the surface V standard of GB 3838—2002. However, for wet-weather sewage treatment when the inlet sewage was 1.5 m³/h, the optimal operation conditions were as follows: the DO in the O₁ tank between 2.5~3.5 mg/L, internal reflux 200% and external reflux 100%, PAC addition amount 23 mg/L and carbon source addition amount equal to 60 mg/L COD, the treated effluent was up to discharge standards Table 2 of main water pollutants for urban sewage treatment plants (DB 33/2169—2018) of Zhejiang province. The results of high-throughput sequencing showed that the dominant phylum, class and species in dry-weather sewage treatment system were Proteobacteria (59.25%), Gammaproteobacteria (31.57%) and Dechloromona (7.76%), respectively. While, for wet-weather sewage treatment system, Proteobacteria (46.02%), Bacteroidia (32.71%), and norank-Saprospiracea (20.65%) were the dominant phylum, class and species. Diatomite played the role of microbial carrier and sink aid, increased the biological viscosity, improved the sludge concentration in the biochemical system, and expanded the treatment scope of the reactor. Bio-diatomite reactor had a good application prospect.
- bio-diatomite,
- A/O/A/O,
- diverted wastewater by pump station,
- microbial population

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