摘要
为满足大豆深加工行业废水处理的需要,结合好氧-厌氧耦合(AAC)工艺和移动床生物膜反应器(MBBR),研发了连续化好氧-厌氧耦合(CAAC)工艺.该工艺通过水流方向上交替改变的环境条件,实现大豆深加工废水厌氧出水污染物的去除和剩余污泥减量化.试验采用模拟大豆深加工废水厌氧出水进行处理,水力停留时间(HRT)≥1.3d时,出水ρ(CODCr)保持在50mg/L以下,CODCr去除率为95%,出水ρ(MLSS)保持在0～15mg/L.经过301d的试验,仅排放污泥1次,表观污泥产率为0.1571,为活性污泥法的31.4%,具备良好的污泥减量化特性.
To meet the demands of the treatment of wastewater from the soybean further processing industry, a continuous aerobic- anaerobic coupled （CAAC） process composed of moving bed biofilm reactor （MBBR） and AAC reactor was designed. The CAAC process achieved contamination removal and excess sludge reduction of anaerobic effluents from synthetic soybean deep processing wastewater through changing environmental conditions in different reactors along the flow of the stream. When the hydraulic retention time （HRT） was longer than or equal to 1.3 d, p（CODCr） was below 50 mg/L in the effluent and the removal rate of CODCr reached 95%. p（MLSS） in the effluent was controlled between 0-15 mg/L stably. During 301 days of continuous operation,a discharging sludge was completed and the observed yield of sludge was 0. 1571, which was only 31.4% that of the activated sludge process. The CAAC process showed excellent excess sludge reduction.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2010年第7期964-969,共6页
Research of Environmental Sciences
基金
国家水体污染控制与治理科技重大项目(2008ZX07207-003-3)
关键词
废水处理
剩余污泥减量化
连续化好氧-厌氧耦合
wastewater treatment
excess sludge reduction
continuous aerobic-anaerobic coupled （CAAC）
