单级好氧生物除磷工艺处理生活污水

采用SBR单级好氧生物除磷工艺处理生活污水,检验该工艺处理实际污水的可行性和稳定性,并与传统厌氧/好氧工艺进行比较.结果表明,当进水磷浓度为2~10mg/L时,SBR单级好氧生物除磷工艺能高效去除污水中的磷,经过长期运行去除效果稳定,去除率保持在90%以上,最高可达98.6%.该工艺对污水中的氨氮、TN、COD等污染物也具有良好的去除效果,平均去除率分别在92%、87%、90%以上,并可实现同步脱氮除磷.SBR单级好氧生物除磷工艺无厌氧段实现强化生物除磷,与传统厌氧/好氧工艺相比,除磷能力相当,但运行成本较低,经济性优势明显.

Biological phosphorus removal of domestic wastewater by single-stage oxic process

A sequencing batch reactor operated in single-stage oxic process was conducted to examine its feasibility and stability for the treatment of real domestic wastewater. And meanwhile, the system performance was compared with the traditional anaerobic/aerobic process. The laboratory results showed that 98.6% of the highest efficiency of phosphorus removal could be achieved in the single-stage oxic process when the TP concentration of the influent ranged from 2 to 10 mg/L, and simultaneous removal of nitrogen and phosphorus could be well realized during long-term operation, the average removal rates of NH4+-N, TN and COD were found to be higher than 92%, 87% and 90%, respectively. Although the two processes had the approximate phosphorus removal rate, the single-stage oxic process, in which without anaerobic phase, had an obvious economic advantage over anaerobic/aerobic process due to its lower running cost.