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.
北方城镇污水处理厂提标扩容HPB技术中试研究
- Title:
- Piolt Test of HPB Technology Applied in Upgrading and Expansion of a Municipal Wastewater Treatment Plant in North China
- 关键词:
- 高浓度复合粉末载体生物流化床; 提标扩容; 脱氮除磷; 微生物群落结构
- Keywords:
- high-concentration composite powder carrier biological fluidized bed (HPB); upgrading and expansion; nitrogen and phosphorus removal; microbial community composition
- 摘要:
- 针对北方城镇污水处理厂冬季气温低、出水水质难以达标的难题，依托山西省太原市某污水处理厂开展了高浓度复合粉末载体生物流化床（HPB）技术在低温环境下（<10 ℃）的提标扩容中试研究。通过向生化单元投加复合粉末载体，混合液悬浮固体（MLSS）为10~15 g/L，污水处理量由5.76 m3/d（模拟量为12.8×104 m3/d）逐步提升至9.60 m3/d（模拟量为21.3×104 m3/d），HRT由11.83 h缩短为7.11 h，同时出水水质指标均可稳定达到山西省地方标准《污水综合排放标准》（DB 14/1928—2019），出水COD、NH3-N、TN和TP的平均浓度分别为22.8、0.39、6.85和0.28 mg/L。当中试运行至第30 天和第100 天时，分析各生化单元的微生物情况发现，微生物群落结构发生了明显变化，拟杆菌门的相对丰度由37.76%降低至15.99%，变形菌门的相对丰度则基本维持在22.75%，而放线菌门的相对丰度由14.77%提升至37.88%，成为了相对丰度较高的菌群，强化了生物脱氮除磷。中试结果表明，在低温环境下HPB技术对于城镇污水处理厂的提标扩容具有重要的推广应用价值。
- 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.
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