Nitrogen removal influence factors in A/O process and decision trees for nitrification/denitrification system

作     者：MAYong PENGYong-zhen WANGShu-ying WANGXiao-lian 

作者机构：SchoolofMunicipalandEnvironmentalEngineeringHarbinInstituteofTechnologyHarbin150090China DepartmentofEnvironmentalEngineeringBeijingUniversityofTechnologyBeijing100022China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2004年第16卷第6期

页      面：901-907页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：TheNationalNaturalScienceFoundationofChina(No .5 0 1 380 1 0 ) theKeyTechnologyProjectofBeijingMunicipalEducationCommission(No .KZ2 0 0 31 0 0 0 5 0 0 3)andtheProjectofBeijingScienceandTechnologyCommittee(No .H0 2 0 62 0 0 1 0 1 2 0 ) 

主　　题：A/O process nitrification denitrification nitrogen removal decision trees 

摘      要：In order to improve nitrogen removal in anoxic/oxic(A/O) process effectively for treating domestic wastewaters, the influence factors, DO(dissolved oxygen), nitrate recirculation, sludge recycle, SRT(solids residence time), influent COD/TN and HRT(hydraulic retention time) were studied. Results indicated that it was possible to increase nitrogen removal by using corresponding control strategies, such as, adjusting the DO set point according to effluent ammonia concentration; manipulating nitrate recirculation flow according to nitrate concentration at the end of anoxic zone. Based on the experiments results, a knowledge-based approach for supervision of the nitrogen removal problems was considered, and decision trees for diagnosing nitrification and denitrification problems were built and successfully applied to A/O process.