通过对武汉市经开区一处雨污合流排水明渠污染治理工程的实践，重点展示了一种改良 AO 技术应用于污水处理工程，该技术理念基于"生物倍增"原理，具有:①大流量低能耗循环回流，气提混合液回流，回流比达到(1∶10)～(1∶100);②超高氧传质效率，6 m清水测试氧传质效率高达 50%;③高污泥浓度，运行工况达到 6～8 g/L;④低溶氧环境运行，实现 0。3～0。5 mg/L，使硝化速率与反硝化速率同时达到一个极高水平。对比其他工艺，优点突出表现在:工艺流程短、布局紧凑、处理效率高、能耗低、管理和维护方便等。
AnImproved AO Technology Applied to Sewage Treatment Engineering
Based on the"biological multiplication"technology,an improved AO technology was introduced in the sewage treatment project in Wuhan Economic and Technological Development Zone.The process has the follow-ing characteristics:①It has circulation reflux with large flow and low energy consumption,and the reflux ratio of air lift mixed liquid reaches(1∶10)～(1∶100);②It has ultra-high oxygen mass transfer efficiency.6m water test oxygen mass transfer efficiency is up to 50%;③ It has high sludge concentration with 6～8 g/L operating conditions;④Operation in low-dissolved oxygen environment can achieve 0.3～0.5 mg/L,so that the nitrification rate and denitrification rate reach a very high level at the same time.Compared with other processes,the advanta-ges are:short process flow,compact layout,high processing efficiency,low energy consumption,easy management and maintenance.
improved AO technologiesbiological doublinglarge flow and low energy consumption circulation refluxultra-high mass transfer aeration efficiencylow dissolved oxygen operation
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