混凝-UASB-SBR组合工艺处理化学浆糊清洗废水的试验研究
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摘要
本文为了解决实际化学浆糊清洗废水的处理问题,使用上海市某企业工艺原料(化学浆糊)配水模拟清洗废水进行可生化性及其处理工艺研究。化学浆糊清洗废水及纺织印染退浆水是含有较高有机污染物的水质,主要成分是改性淀粉及PVA。PVA的生化降解性能比较低,在自然环境中,可降解PVA的微生物非常少,通常只出现在被PVA污染的环境中,因而该废水属于比较难处理的废水。针对这一特性,笔者考虑参考国内外成熟废水处理工艺,即选择混凝-UASB-SBR组合工艺对废水进行实验室小试,通过进行混凝沉淀预处理,以提高废水的可生化性,进行后续生化处理,达到《污水综合排放标准》(GB8978-1996)的二级排放标准。本试验处理效果好坏以测定的CODCr为主要指标。
试验结果表明,混凝条件最佳pH为2,最好的药剂选择、投加顺序及投放量是硫酸钠2g,硼酸0.3g,氢氧化钙3g。物化的去除率较低(70%以下),出水上限无法做到达标排放,但混凝处理后B/C由处理前的0.26提高到0.34,提高了对清洗废水的可生化性,可以作为生化方法的预处理。文章研究重点放在生化方法上,并着重利用厌氧颗粒污泥优化UASB来提高
对废水的处理能力及效率。分别通过采用颗粒污泥和普通厌氧消化污泥作为接种污泥来考察反应器的去除效果,说明颗粒污泥化对于UASB稳定处理清洗废水的效率显著提高,最大容积负荷VLR达到9.11kgCOD/m~3·d,COD去除率维持在90%以上,出水pH值为7.5,出水SS为135 mg/L,容积产气量为3.37m~3/m~3·d,出水水质有利于后续好氧生物处理。经过SBR处理,容积负荷最大达到9.6kgCOD/m~3·d,出水保持在100mg/L以下,出水水质达到二级排放标准。在UASB反应器污泥颗粒化处理化学浆糊清洗废水的试验中,考察了种污泥、水力负荷Vup、pH、温度、水力停留时间、反应器负荷对出水水质的影响。结果表明,运用混凝-UASB-SBR组合工艺处理化学浆糊清洗废水是实用、可行的方案。论文的研究结果对于厌氧工艺中采用颗粒污泥来提高处理效率,具有理论和实践意义。
The performances of laboratory simulation the chemistry adhesive cleaning wastewater which came from a factory in shanghai in biochemical treatment and treatment methodology of this wastewater were studied for solving the question of engineering project in fact.
The chemistry adhesive cleaning wastewater and the desizing wastewater are difficult to solve because their removal of organic substance. There are two main kinds of ingredients in the sample. They are modified starch and PVA.PVA has poor biodegradability. There are less microorganisms in nature are useful in removal of PVA. They are found in the polluted water of PVA. Solving is so difficult. Basing on the characteristic of cleaning wastewater, a three-step method to treat cleaning wastewater was proposed, that is coagulate-UASB-SBR. The results from experiments indicated that CODcr containted in the cleaning wastewater can be eliminated with the help of deposit, the waste water in biochemical treatment had changed for the better. The treatment effect can reach the secondary standards of GB8978-1996.The CODcr is a good chemistry index to analysis the effects.
The result of coagulate treatment showed that the best pH was 2.0,the best coagulant were sodium sulfate 2g、boracic acid 0.3g and potassium hydroxide 3g.As a result, the removal rate of CODcr reached 70.0%,the treatment effect can not reach the secondary standards of GB8978-1996. Through the result of coagulate treatment, B/C rose from 0.28 to 0.34. The waste water in biochemical treatment had changed for the better.
The key place of this article is the biochemistry method, and uses the anaerobic granular sludge to optimize UASB emphatically to enhance to the waste water handling ability and the efficiency. Using the granular sludge through the 1st reactor to take the vaccination sludge separately,and the 2nd reactor vaccination sludge inspects reactor's elimination effect for the ordinary anaerobic digestion sludge, explained that granulation of anaerobic granular sludge obviously enhances regarding the UASB stabilizing treatment cleaning wastewater's efficiency.The greatest capacity carries VLR up to 9.11kgCOD/m~3·d, the removal rate of CODcr above 90%, pH is 7.5, water leakage SS is 135 mg/L, the volume of producing gases is 3.37m~3/m~3·d, the water leakage water quality belongs may the biochemistry good waste water. Research on the processing effect of the next treatment methodology-SBR reactor is conducted, the greatest capacity carries up to 9.6kgCOD/m3·d, the effluent CODcr concentration stabilized under 100mg/L,the effluent water quality had lowered the National Standard Level of China.
In the experiment of using the anaerobic granular sludge to optimize UASB reactor, this paper studies inoculate sludge, V_(up), pH, the temperature reactor, HRT and VLR load to the water leakage water quality influence. In conclusion ,the three-step method used to deal with the chemistry adhesive cleaning wastewater, show it to be feasible in technique.The paper findings use the anaerobic granular sludge in UASB reactor to raise the processing efficiency, has the theory and the practice significance.
试验结果表明,混凝条件最佳pH为2,最好的药剂选择、投加顺序及投放量是硫酸钠2g,硼酸0.3g,氢氧化钙3g。物化的去除率较低(70%以下),出水上限无法做到达标排放,但混凝处理后B/C由处理前的0.26提高到0.34,提高了对清洗废水的可生化性,可以作为生化方法的预处理。文章研究重点放在生化方法上,并着重利用厌氧颗粒污泥优化UASB来提高
对废水的处理能力及效率。分别通过采用颗粒污泥和普通厌氧消化污泥作为接种污泥来考察反应器的去除效果,说明颗粒污泥化对于UASB稳定处理清洗废水的效率显著提高,最大容积负荷VLR达到9.11kgCOD/m~3·d,COD去除率维持在90%以上,出水pH值为7.5,出水SS为135 mg/L,容积产气量为3.37m~3/m~3·d,出水水质有利于后续好氧生物处理。经过SBR处理,容积负荷最大达到9.6kgCOD/m~3·d,出水保持在100mg/L以下,出水水质达到二级排放标准。在UASB反应器污泥颗粒化处理化学浆糊清洗废水的试验中,考察了种污泥、水力负荷Vup、pH、温度、水力停留时间、反应器负荷对出水水质的影响。结果表明,运用混凝-UASB-SBR组合工艺处理化学浆糊清洗废水是实用、可行的方案。论文的研究结果对于厌氧工艺中采用颗粒污泥来提高处理效率,具有理论和实践意义。
The performances of laboratory simulation the chemistry adhesive cleaning wastewater which came from a factory in shanghai in biochemical treatment and treatment methodology of this wastewater were studied for solving the question of engineering project in fact.
The chemistry adhesive cleaning wastewater and the desizing wastewater are difficult to solve because their removal of organic substance. There are two main kinds of ingredients in the sample. They are modified starch and PVA.PVA has poor biodegradability. There are less microorganisms in nature are useful in removal of PVA. They are found in the polluted water of PVA. Solving is so difficult. Basing on the characteristic of cleaning wastewater, a three-step method to treat cleaning wastewater was proposed, that is coagulate-UASB-SBR. The results from experiments indicated that CODcr containted in the cleaning wastewater can be eliminated with the help of deposit, the waste water in biochemical treatment had changed for the better. The treatment effect can reach the secondary standards of GB8978-1996.The CODcr is a good chemistry index to analysis the effects.
The result of coagulate treatment showed that the best pH was 2.0,the best coagulant were sodium sulfate 2g、boracic acid 0.3g and potassium hydroxide 3g.As a result, the removal rate of CODcr reached 70.0%,the treatment effect can not reach the secondary standards of GB8978-1996. Through the result of coagulate treatment, B/C rose from 0.28 to 0.34. The waste water in biochemical treatment had changed for the better.
The key place of this article is the biochemistry method, and uses the anaerobic granular sludge to optimize UASB emphatically to enhance to the waste water handling ability and the efficiency. Using the granular sludge through the 1st reactor to take the vaccination sludge separately,and the 2nd reactor vaccination sludge inspects reactor's elimination effect for the ordinary anaerobic digestion sludge, explained that granulation of anaerobic granular sludge obviously enhances regarding the UASB stabilizing treatment cleaning wastewater's efficiency.The greatest capacity carries VLR up to 9.11kgCOD/m~3·d, the removal rate of CODcr above 90%, pH is 7.5, water leakage SS is 135 mg/L, the volume of producing gases is 3.37m~3/m~3·d, the water leakage water quality belongs may the biochemistry good waste water. Research on the processing effect of the next treatment methodology-SBR reactor is conducted, the greatest capacity carries up to 9.6kgCOD/m3·d, the effluent CODcr concentration stabilized under 100mg/L,the effluent water quality had lowered the National Standard Level of China.
In the experiment of using the anaerobic granular sludge to optimize UASB reactor, this paper studies inoculate sludge, V_(up), pH, the temperature reactor, HRT and VLR load to the water leakage water quality influence. In conclusion ,the three-step method used to deal with the chemistry adhesive cleaning wastewater, show it to be feasible in technique.The paper findings use the anaerobic granular sludge in UASB reactor to raise the processing efficiency, has the theory and the practice significance.
引文
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