ZHANGXiao-ya,CHENJun,DONGYang,et al.A Pilot-scale Test of Gravel Contact Oxidation for River Water Treatment and Characteristics of Bacterial Genera[J].China Water & Wastewater,2022,38(21):93-100.
A Pilot-scale Test of Gravel Contact Oxidation for River Water Treatment and Characteristics of Bacterial Genera
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第21期
Page:
93-100
Column:
Date of publication:
2022-11-01
- Keywords:
- gravel contact oxidation reactor (GCOR); river water purification; bacterial genera characteristics; start-up and biofilm culturing; step feed
- Abstract:
- A gravel contact oxidation reactor (GCOR) was made to purify the water from a river, and the influencing factors of its start-up and operation were investigated. The reactor successfully realized biofilm culturing within approximately 30 days by gradually increasing the hydraulic load. In the stable operational stage, the effects of hydraulic retention time (HRT), aeration conditions and step feed mode on the operation of the reactor were investigated. The operation of the reactor was the best when HRT was 5 h, aeration was provided in contact oxidation zone 1, and the distribution ratio of water distribution zones 1 and 3 was 6 to 4. The high-throughput sequencing results showed that the biofilm on the packing media surface of the system had complex microecological environment and high microbial diversity. The diversity of bacteria and the enrichment of dominant bacteria in the front of the biofilm system were better than those in the back end. Different functional microbial communities were enriched on biofilm in different areas, so as to achieve efficient organic matter degradation and nitrogen and phosphorus removal.
Last Update:
2022-11-01