摘要
针对日益严格的污水排放标准,对可调节式AAO工艺进行调整,研究多点进水和增设预缺氧段对脱氮除磷效果的影响。结果表明,多点进水工艺调整能够提高整个生物系统对碳源的利用能力,缓解了聚磷菌和反硝化细菌对碳源的矛盾和竞争,促进了缺氧段的反硝化作用,反硝化速率(以NO3--N计)可达6.78 mg/(gVSS·h),提高了TN去除率,达83%左右;增设预缺氧段能够有效提高聚磷菌在厌氧段的释磷作用,释磷速率(以PO_(4)^(3-)-P计)可达5.04 mg/(gVSS·h),释磷倍数高达9.57倍。可调节式AAO的优化运行能够有效地脱氮除磷,保障污水处理厂出水水质稳定达到“苏州特别排放限值”的要求。
This paper modified the operation of an adjustable AAO process to investigate the influence of step feed and setting of pre-anoxic section on nitrogen and phosphorus removal performance in response to increasingly stringent sewage discharge standards.The adjustment of the step-feed process improved the utilization capacity of carbon sources of the entire biological system,alleviated the contradiction and competition between phosphorus-accumulating bacteria and denitrifying bacteria for carbon sources,and promoted the denitrification efficiency in the anoxic section.The denitrification rate(measured by NO3--N)reached 6.78 mg/(gVSS·h),and the TN removal rate increased to approximately 83%.The setting of pre-anoxic section effectively improved the phosphorus release of phosphorusaccumulating bacteria in the anaerobic section.The phosphorus release rate(measured by PO_(4)^(3-)-P)reached 5.04 mg/(gVSS·h),and the phosphorus release multiple was as high as 9.57 times.The optimized operation of the adjustable AAO effectively removed nitrogen and phosphorus,and ensured that the effluent quality of the sewage treatment plant stably reached the requirement specified in the“Suzhou Special Discharge Limit”.
作者
马九利
王伟
黄继会
许益鸿
马骏
张俊
MA Jiu-li;WANG Wei;HUANG Ji-hui;XU Yi-hong;MA Jun;ZHANG Jun(Suzhou Drainage Co.Ltd.,Suzhou 215006,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2023年第17期70-73,共4页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2017ZX07205001)。
关键词
可调节式AAO工艺
污水处理厂
多点进水
预缺氧段
脱氮除磷
adjustable AAO process
sewage treatment plant
step-feed process
pre-anoxic section
nitrogen and phosphorus removal
