摘要
七里店污水净化厂采用微孔曝气Carrousel氧化沟工艺,单座氧化沟日处理量达到改造工程设计规模的2倍,氧化沟水力停留时间约为5 h。进水BOD5/TP平均为19.86,碳源基本满足聚磷菌释磷的要求;氧化沟分为缺氧区和好氧区,没有严格的厌氧区,但TP去除率高;温度对生物除磷无明显影响。系统BOD5/TN偏低、氧化沟水力停留时间短是影响系统脱氮效果的重要因素;温度对生物脱氮有显著的影响,生物脱氮效率随着温度的下降而降低。二沉池出水氨氮、TP浓度比进水高,二沉池明显的磷释放现象和氨化现象对系统脱氮除磷的效果影响大。
The microporous aeration carrousel oxidation ditch process is used in Qilidian wastewater treatment plant. The daily capacity of single oxidation ditch reached twice that of the designed reconstructed project at the hydraulic retention time （HRT） of 5 h. The average of BOD,ITP is 19.86 which shows that carbon source for the phosphorus release would satisfy the requirements of phosphate accumulating bacteria. The oxidation ditch can be divided intoanoxic zone and aerobic zone. There is no strict anaerobic zone in the oxidation ditch, but the efficiency of removal phosphorusis is higher. The temperature has no apparent influence on biological phosphorus removal of the oxidation ditch. The low BOD,ITN values and short HRT would lead to low nitrogen removal efficiency. The temperature has great impact on biological nitrogen removal of the Qilidian WWTP. The treatment efficiency of biological nitrogen decreases with temperature decreasing. The average concentration of ammonia nitrogen and phosphorus in effluent clarifier is higher than that in influent clarifier.The clarifier has the phenomenon of phosphorus release and amination reaction, which have a relative large influence on biological nutrient removal of the Qilidian WWTP.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第4期103-106,共4页
Technology of Water Treatment
基金
国家自然科学基金项目(41161075)
广西科学研究与技术攻关项目(桂科攻10124002-2)
关键词
CARROUSEL氧化沟
脱氮除磷
微孔曝气
温度
溶解氧
二沉池
carrousel oxidation ditch
nitrogen and phosphorus removal
microporous aeration
temperature
DO
final clarifier
