HANHong-bo,WANGCheng-xian,MOUYue,et al.Piolt Test of HPB Technology Applied in Upgrading and Expansion of a Municipal Wastewater Treatment Plant in North China[J].China Water & Wastewater,2023,39(13):81-87.
Piolt Test of HPB Technology Applied in Upgrading and Expansion of a Municipal Wastewater Treatment Plant in North China
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第13期
Page:
81-87
Column:
Date of publication:
2023-07-01
- Keywords:
- high-concentration composite powder carrier biological fluidized bed (HPB); upgrading and expansion; nitrogen and phosphorus removal; microbial community composition
- Abstract:
- This paper carried out a pilot study on high-concentration composite powder carrier biological fluidized bed (HPB) technology for upgrading and expansion of a wastewater treatment plant at low temperature (less than 10 ℃) in Taiyuan, Shanxi Province, so as to solve the problem of low temperature and poor effluent quality of municipal wastewater treatment plants in North China in winter. By adding composite powder to the biochemical unit, the mixed liquor suspended solids (MLSS) was 10-15 g/L, the sewage treatment capacity was gradually increased from 5.76 m3/d to 9.60 m3/d (the corresponding actual sewage treatment capacity was 12.8×104 m3/d and 21.3×104 m3/d respectively), and the hydraulic retention time (HRT) was shortened from 11.83 h to 7.11 h. In addition, the effluent quality indexes stably met the requirements specified in Comprehensive Sewage Discharge Standard (DB 14/1928-2019) of Shanxi Province, and the average values of effluent COD, NH3-N, TN and TP were 22.8 mg/L, 0.39 mg/L, 6.85 mg/L and 0.28 mg/L, respectively. The microbial community of each biochemical unit was analyzed on days 30 and 100, and it was found that the microbial community composition changed significantly. At phylum level, the relative abundance of Bacteroidota decreased from 37.76% (day 30) to 15.99% (day 100), and the relative abundance of Proteobacteria was basically remained at 22.75%. However, the relative abundance of Actinobacteriota increased from 14.77% (day 30) to 37.88% (day 100) and became a dominant phylum, which enhanced the biological nitrogen and phosphorus removal. The pilot test results showed that HPB technology had important application value for upgrading and expansion of municipal wastewater treatment plants at low temperature.
Last Update:
2023-07-01