给水排水专业论文
摘要：选用一体化膜—序批式生物反应器(Submerged Membrane Sequencing Batch Reactor，简称SMSBR)处理焦化废水，考察了能否通过膜分离的给水排水专业论文强化作用提高生物处理系统对焦化废水的给水排水专业论文处理效果，使出水COD达到新的排放标准(＜100 mg/L)，并提高脱氮效率。研究结果表明：在HRT为32.7 h，平均COD容积负荷为0.45kg/(m3·d)的条件下，出水COD可以稳定在100 mg/L以下(平均为86.4 mg/L)；要使COD达到新的排放标准，进水COD容积负荷应低于0.67kg/(m3·d)(该负荷下出水COD在100 mg/L上下波动，平均为106.3 mg/L)；好氧段存在明显的反硝化现象，使COD的去除得到强化；在保证系统温度、碱度、溶解氧和不受进水COD负荷冲击的情况下，出水NH3-N可低于1 mg/L，但泥龄太长所产生的微生物代谢产物抑制了硝化反应过程中的硝酸盐细菌，使好氧段出水NO2-N/NOx-N平均为91.1%，因此系统获得极其稳定高效的短程硝化作用，有利于进一步脱氮；按“缺氧1—好氧—缺氧2”方式运行时，若“缺氧2”的HRT＞8.44 h，可实现81.34%的反硝化率(外加碳源：COD/N为2.1 g/g)，平均TN去除率为87.2%，最高达90.2%。
关键词：SMSBR 焦化废水 有机物 脱氮
中图分类号：X703.1
文献标识码：A
文章编号：1000-4602(2001)05-0006-06
Characteristics of Submerged SMSBR in Removal of
Organic Matters and Nitrogen from Coke Plant Wastewater
LI Chun-jie1，GENG Yan2，ZHOU Qi2，GU
Guo-wei2
(1.School of Environ.Sci.and Eng.,Shanghai Jiaotong
Univ.,Shanghai 200240,China; 2.State Key Lab.of Pollution Control
and Resource Reuse,Tongji Univ.,Shanghai 200092,China)
Abstract：A SMSBR was used for treating coke
plant wastewater and enhanced effects of membrane separation on the
treatment efficiencies were investigated.The purpose of the study
was to make effluent COD meet the new discharge
standard(＜100mg/L),and increase the removal efficiency of
nitrogen.The result shows that effluent COD is steadily below 100
mg/L (86.4 mg/L on the average) at the HRT of 32.7 h and the COD
volume loading rate of 0.45kg/(m3·d).To reach the new
effluent discharge standard,COD volume loading rate should be lower
than 0.67kg/(m3·d).In this condition effluent COD
fluctuates around 100 mg/L (106.3 mg/L on the average).The COD
removal is enhanced by denitrification appearing in the aerobic
stage.The effluentNH3-N is lower than 1 mg/L when
temperature, alkalinity,and dissolved oxygen in the system are under
control and there is no COD
shock-load.NO2-N/NO3-N in the effluent from
the aerobic stage is 91.1% on the average because nitrifers in
nitrification process are inhibited by the metabolic products of
microorganisms due to long sludge age. This shows that short-cut
nitrification/denitrification is obtained with high efficiency and
stability in the system, and is benefit for further removal of
nitrogen.SMSBR system operates in anoxic-aerobic-anoxic mode,HRT of
the second anoxic stage is longer than 8.44 h and carbon source is
added (COD/N=2.1),the average removal efficiency of total nitrogen
can reach 87.2% (90.2% as the maximum) and efficiency of
denitrification can reach 81.34%。
Keywords:SMSBR;coke
plant wastewater;organic matter;nitrogen removal
膜生物反应器(Membrane
Bioreactor，简称MBR)是通过膜分离来强化生物处理系统的一种组合工艺，而传统的生物处理工艺则对有毒或难降解有机废水的处理存在一定的局限性，因此能否通过膜分离的强化作用提高生物处理系统对这些废水的处理效果是一个值得研究的课题。之所以选用一体化膜—序批式生物反应器(简称SMSBR)来处理焦化废水，是因为：①焦化废水是一种典型的有毒难降解有机废水，虽适于用生物处理系统，但传统的A/O或A2/O工艺的处理效果还不理想，出水COD难以达到新的排放标准(＜100
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