C/N值对SBBR反应器深度脱氮除磷效能的影响  

Effect of C/N Ratio on Advanced Phosphorus and Nitrogen Removal of SBBR Reactor

作　　者：范晓玮 刘石虎[1] 孟红[1] 林子源 周健[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《中国给水排水》2017年第19期37-41,共5页China Water & Wastewater

摘　　要：研究基于地表水环境质量标准的城镇污水SBBR反应器深度脱氮除磷技术,重点考察了BOD_5/TN对脱氮除磷效能的影响。结果表明,进水BOD_5/TN对系统脱氮除磷效能影响显著。当BOD_5/TN≥5时,反应器中异养硝化菌得到优势富集,促进了系统对氨氮的去除;并且系统具有较高的硝化、同步脱氮及除磷速率。在温度为25℃、BOD_5/TN为5、DO为4 mg/L,有机物、氮、磷负荷分别为0.8、0.09、0.01 kg/(m^3·d),运行工况为进水6 min、厌氧2 h、好氧9 h、沉淀0.8 h、排水6 min,以及排除厌氧富磷水的条件下,系统出水COD、NH_4^+-N、TN和PO_4^(3-)-P分别为18.5、0.52、1.76、0.35 mg/L,平均去除率分别为95.8%、98.8%、96.2%和93.1%。出水COD、NH_4^+-N达到地表水环境质量Ⅲ类水体标准,PO_4^(3-)-P、TN达到地表水环境质量Ⅴ类水体标准。To achieve the surface water environmental quality standard, the advanced nitrogen and phosphorus removal technology of municipal wastewater was studied. This research investigated the effect of BOD5/TN on nitrogen and phosphorus removal efficiency in sequencing biofilm batch reactor（SBBR）. The results showed that the nitrogen and phosphorus removal efficiency were significantly influenced by the BOD5/TN ratio. Under the condition of BOD5/TN≥5, the heterotrophic nitrifying bacteria were successfully enriched and promoted ammonia nitrogen removal, getting a high nitrification, denitrification and phosphorus removal rate. At 25 ℃,when the BOD5/TN was 5, DO was 4 mg/L, the organics, nitrogen and phosphorus loading rate were 0.8 kgCOD/（m3 · d）, 0.09 kgTN/（m3 · d） and 0.01 kgP/（m3 · d） respectively, and the operating condition was as follows： 6 min filling, 2 h anaerobic reaction, 9 h aerobic reaction,0.8 h precipitation and 6 min drawing, the effluent COD, NH4＋ - N, PO4^3- - P were stable at 18.5 mg/L, 0.52 rag/L, 1.76 mg/L and 0.35 mg/L,with the average removal rates being 95.8%, 98.8%, 96.2% and 93.1%, respectively. The effluent COD, NH4＋ -N reached class Ⅲ water standard and the effluent PO4^3- -P, TN could reach class V water standard.

关 键 词：城镇污水 SBBR 深度脱氮除磷 C/N 

分 类 号：X703[环境科学与工程—环境工程]