Removal of organic matter and nitrogen in anaerobic/anoxic and aerobic compartimented reactor treating domestic sewage
The removal of organic matter and nitrogen in domestic sewage was evaluated through a treatment system consisting of two parallel vertical compartmented reactors.Each reactor had two compartments,an anaerobic/anoxic with flocculent sludge,aiming for the removal of organic matter and denitrification,followed by an aerobic filled with plastic-ring carriers aiming for nitrification and removal of the remaining organic matter.Both reactors were operated with hydraulic retention time (HRT) of 8 to 12 h,the first with recirculation ratio of 1.5 and the second with 3.0.The nitrified effluent of the aerobic compartment was recirculated to the anaerobic compartment without the addition of extra electron donor.The most satisfactory operating results were found for HRT of 12 h for both reactors.The average removal efficiencies for reactor 1 were 52 ± 15%,81 ± 7% and 60% for total chemical oxygen demand (COD),filtered COD and N-TKN,respectively;the average effluent concentrations were 119 ± 47 mg CODtot.L-1,50 ± 23 mg CODfil.L-1 and 15 ± 5 mg N-TKN.L-1,respectively.The removal results for reactor 2 were 51 ± 15%,83 ± 6% and 57%,respectively;and the effluent concentrations were 132 ± 58 mg CODtot.L-1,46 ± 24 mg CODfil.L-1 and 16 ± 3 mg N-TKN.L-1,respectively.
flocculent and attached heterotrophic and autotrophic competition hydraulic retention time MBBR reactor recirculation rate sludge nitrification and denitrification
Juliana C.Morais Savia Gavazza Lourdinha Florencio Mario T.Kato
Federal Institute of Pernambuco, Department of Infrastructure and Civil Construction, Av.Prof.Luiz F Federal University of Pernambuco, Department of Civil Engineering, Laboratory of Environmental Sanit
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
529-532
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）