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饥饿对两级SBR反应器内活性污泥的影响

李波茵 周北海 马方曙 施春红

李波茵, 周北海, 马方曙, 施春红. 饥饿对两级SBR反应器内活性污泥的影响[J]. 环境科学研究, 2016, 29(3): 419-426.
引用本文: 李波茵, 周北海, 马方曙, 施春红. 饥饿对两级SBR反应器内活性污泥的影响[J]. 环境科学研究, 2016, 29(3): 419-426.
LI Boyin, ZHOU Beihai, MA Fangshu, SHI Chunhong. Impact of Starvation Conditions on Activated Sludge in Two-Stage SBR Reactor[J]. Research of Environmental Sciences, 2016, 29(3): 419-426.
Citation: LI Boyin, ZHOU Beihai, MA Fangshu, SHI Chunhong. Impact of Starvation Conditions on Activated Sludge in Two-Stage SBR Reactor[J]. Research of Environmental Sciences, 2016, 29(3): 419-426.

饥饿对两级SBR反应器内活性污泥的影响

基金项目: 2014年海洋公益性行业科研专项(201405035)

Impact of Starvation Conditions on Activated Sludge in Two-Stage SBR Reactor

  • 摘要: 为探究饥饿期内活性污泥中微生物活性的衰减速率、物理性质的变化及恢复情况,研究了好氧〔ρ(DO)=5.50 mg/L〕/缺氧〔ρ(DO)≤0.03 mg/L〕饥饿期对稳定运行的两级SBR反应器内污泥活性的影响,同时考察了污泥的恢复能力及理化性质的变化. 结果表明:30 d的饥饿使CODCr去除率下降了20.8%,rCOD(异养菌活性)由111.8 mg/(L·h)降至59.2 mg/(L·h);NH4+-N去除率下降了59.2%;CODCr去除率、rCOD、NH4+-N去除率分别在94、97、95 d时恢复. 饥饿期内AOB(氨氧化细菌)的衰减速率(kAOB)为0.029 d-1,NOB(亚硝酸盐氧化细菌)的衰减速率(kNOB)为0.021 d-1. 恢复初期AOB的恢复速率(kAOB′=0.125 d-1)大于NOB的恢复速率(kNOB′=0.069 d-1),导致NO2--N的累积. 此外,饥饿期ρ(MLSS)下降了42.6%;SVI(污泥指数)由71.2 mL/g升至135.1 mL/g;w(EPS)(EPS为胞外聚合物)由37.9 mg/g(以VSS计)降至18.5 mg/g,其中主要由w(PN)(PN为蛋白质)的减少所致;各物理指标的变化均可在恢复期内恢复.

     

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出版历程
  • 收稿日期:  2015-08-08
  • 修回日期:  2015-10-25
  • 刊出日期:  2016-03-25

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