高效低能耗污水处理装置中生物脱氮技术的研究

STUDY ON THE TECHNOLOGY OF BIOLOGICAL NITROGEN REMOVAL IN HIGH EFICIENCY AND LOW ENERGY-COST WASTEWATER TREATMENT EQUIPMENT

采用高效低能耗污水处理装置，针对 Ｂ Ｏ Ｄ 容积负荷在０ ．０５ ～０ ．４６ ｋｇ／ｍ３ ｄ － １ 左右的常规浓度和低浓度的城市生活污水，设置进水流量不同的工况，最终使这两种城市生活污水 Ｃ Ｏ Ｄ Ｃｒ 的去除率均达到８０ ％ 以上， Ｂ Ｏ Ｄ５ 的去除率均达到９０ ％ 以上，出水 Ｎ Ｈ３ Ｎ 达标．此外，在低浓度城市生活污水处理的工况上加上一个回流装置，可使总 Ｎ 的去除率从１０ ％ 提高至５０ ％

Treating urban domestic wastewater at normal and low concentration with volumetric loading of about 0.05～0.46 kg m -3 d -1 under different conditions of influent flow, this high effifiency and low energy cost wastewater treatment equipment proved very effective, such as more than 80% COD cr removal, over 90% BOD 5 removal and qualified effluent NH 3 N concentration. Furthermore, the removal of TN could be improved from 10% to about 50% by adding a back flow apparatus in treating urban domestic wastewater at low concentration.