低溶解氧下NaCl和Na<sub>2</sub>SO<sub>4</sub>盐度对SBR脱氮效果和污泥沉降性的影响

张兰河; 王山山; 郭静波

低溶解氧下NaCl和Na₂SO₄盐度对SBR脱氮效果和污泥沉降性的影响

1. 东北电力大学化学工程学院, 吉林吉林 132012;
2. 哈尔滨工业大学城市水资源与水环境国家重点实验室, 哈尔滨 150090;
3. 东北电力大学建筑工程学院, 吉林吉林 132012

基金项目:

城市水资源与水环境国家重点实验室开放基金资助项目(QA201013)

吉林省科技发展计划项目-社会发展重点项目(20110405)

吉林省教育厅“十二五”科学技术研究资助项目(吉教科合字[2012]第95号)

详细信息

作者简介:
张兰河(1971—),男,副教授,主要从事废水与废气生物治理技术方面的研究,E-mail:zhanglanhe@163.com

中图分类号: x703.1
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出版历程
- 收稿日期: 2012-05-01
- 网络出版日期: 2023-01-10

Effect of NaCl and Na₂SO₄ Salinity on Denitrification Efficiency and Sludge Settleability of SBR at Low Dissolved Oxygen

1. School of Chemical Engineering, Northeast Dianli University, Jilin 132012, Jilin, China;
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;
3. School of Civil Engineering, Northeast Dianli University, Jilin 132012, China

摘要

摘要: 采用序批式生物反应器(SBR)处理含盐废水,在醋酸钠作为碳源的条件下,考察Na₂SO₄和NaCl盐度((ρ(Na₂SO₄))和ρ(NaCl))对脱氮效果和污泥沉降性能的影响.结果表明:低溶解氧(0.3 mg/L)下通过逐渐提高盐度,当ρ(Na₂SO₄)和ρ(NaCl)分别低于18和14 g/L时,氨氮去除率(η(NH₄⁺-N))均高于80%,总氮去除率(η(TN-N))均高于70%.为了进一步探讨盐度冲击对脱氮效果的影响,一次性投加14 g/L的Na₂SO₄和NaCl废水,SBR反应器运行初期,η(NH₄⁺-N)和η(TN-N)均低于55%,随着运行时间的增加,η(NH₄⁺-N)和η(TN-N)分别提高至80%和70%.同时,盐度能影响活性污泥的沉降性,当盐度为0 g/L时,ρ(EPS)为680 mg/L,SVI为100 mL/g;当ρ(Na₂SO₄)为14 g/L时,活性污泥ρ(EPS)达到950 mg/L,SVI为75 mL/g;当ρ(NaCl)为14 g/L时,活性污泥ρ(EPS)达到1 200 mg/L,SVI为65 mL/g.NaCl和Na₂SO₄能提高SBR活性污泥的沉降性能.
- 盐度 /
- 脱氮 /
- 沉降性 /
- 胞外聚合物
Abstract: A continuous experiment was carried out using SBR process to treat wastewater containing saline and effects of NaCl and Na₂SO₄salinity(ρ(Na₂SO₄) and ρ(NaCl)) on the denitrification and activated sludge settleability were investigated at 0.3 mg/L of low dissolved oxygen when sodium acetate was used as carbon source.The results showed that the salinity increased gradually and η(NH₄⁺-N) and η(TN-N) were higher than 80% and 70% when ρ(Na₂SO₄) and ρ(NaCl) were lower than 14 g/L and 18 g/L,respectively.14 g/L of ρ(Na₂SO₄) and ρ(NaCl) wastewater was added one-time to investigate the effect of salinity shock on the denitrification effciency.η(NH₄⁺-N) and η(TN-N) were lower than 55% at initial operation,and η(NH₄⁺-N) and η(TN-N) were increased to 80% and 70%,respectively,with the operation time increasing.Furthermore,the sludge settleability was influenced bythe salinity.The total ρ(EPS) and SVI were 680 mg/L and 100 mL/g,respectively,when the salinity was 0 g/L.ρ(EPS) and SVI were 950 mg/L and 75 mL/g,respectively,when ρ(Na₂SO₄) was 14 g/L.ρ(EPS) and SVI were 1 200 mg /L and 65 mL /g,respectively,when ρ(NaCl) was 14 g /L.NaCl and Na₂SO₄could increase the settleability of sludge.
- salinity /
- denitrification /
- settleability /
- extracellular polymeric substances