摘要
采用前置反硝化曝气生物滤池和聚氨酯填料进行高质量浓度生活污水的试验,控制进水在水力负荷0.64m3/(m2.h)、回流比1∶1的条件下,研究了不同气水比下的处理效果.结果表明,该装置处理效果好且稳定,当好氧段的气水比为20∶1时,去除效果最佳,具有明显的同步硝化反硝化特征,脱氮效果明显,去除率82.96%,出水质量浓度在10 mg/L以下.对好氧段沿层取样,结果表明总氮的去除主要发生在反应器底部0～0.6 m,表明此期间也就是溶解氧在1.5～2 mg/L下同步硝化反硝化作用明显,总氮去除率保持在80%以上.通过同时监测沿层氧化还原电位(oxidation-reduction potential,ORP)的变化,确定出ORP在同步硝化反硝化过程可给出控制信号且反应灵敏稳定.可根据ORP的变化情况,优化调节曝气量,以达到高效节能的效果.
The experiment of high concentration domestic sewage treatment was carried out by using predenitrifieation biological aerated filter （BAF） and polyurethane filler. Under the conditions of the hydraulic loading is 0.64 m3/（ m2 .h） and reflux ratio is 1：1 , the treatment effect of different ratios of air to water was studied. Results show that the treatment effect of the device is good and stable. When the aerobic section of the gas-water ratio is 20： 1, the effect of pollutants removal is the best, with obvious features of simultaneous nitrification and denitrification, significant nitrogen removal ratio of 82.96% , and effluent concentration less than 10 mg/L. Sampling along the layer on the aerobic, results show that the total nitrogen removal mainly occurs at the bottom of the reactor between 0 and 0.6 m, demonstrating when p（DO） is between 1.5 and 2 mg/L, the simultaneous nitrification and denitrification is obvious, and the TN removal rate is remained more than 80%. By simultaneously monitoring changes in ORP values along the layer, the ORP during the simultaneous nitrification and denitrification process can send control signal and respond stably and sensitively. According to the change of ORP, the aeration can be adjusted to save energy efficiently.
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2012年第8期1253-1257,共5页
Journal of Beijing University of Technology
基金
国家水体污染控制与治理科技重大专项(2009ZX07209-004)
北京市科委重大专项(D07060601980802)
关键词
曝气生物滤池
同步硝化反硝化
聚氨酯填料
氧化还原电位
biological aerated filter （BAF）
simultaneous nitrification and denitrification
polyurethane filler
ORP
