Ca~（2+）在SBBR生物膜团聚体培养中的影响研究
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摘要
当前,我国水环境的氮污染日益加剧,危害不断显现,因此受到了人们越来越多的关注,对水体实施有效的脱氮处理已是刻不容缓。生物处理工艺作为一种高效低耗的污水脱氮处理手段,在水处理领域具有极其重要的地位。微生物团聚体作为污水生物处理系统中的反应核心,是水体中多种微生物由于互利共生等关系共同吸附栖息于某一微核而形成的微生态结构,是水体中最为活跃的组成部分之一,它在水体的净化中发挥非常重要的作用。
本论文简单介绍了国内外生物脱氮技术的研究过程和研究成果以及该技术的最新研究进展,主要对Ca2+浓度在净水微生物团聚体培养的影响进行了相关的研究与分析。
通过在5组相同型号的SBBR反应器(ABCDE)内调节进水中的Ca2+含量(分别为0、10mg/L、20mg/L、25mg/L、40mg/L),研究Ca2+在净水生物膜团聚体培养过程的作用影响。结果表明,进水Ca2+投加浓度为25mg/L时驯化培养的生物膜团聚体具有较好的抗挤压能力,抗压强度达到了22N/cm2,密度为1.059g/cm3,活性微生物的百分含量达到了86.90%，远远高于一般污泥团聚体中的微生物含量,去除含氮有机物的效率也较高,COD、BOD5的去除效率达到了85%以上。分析运行效果,反应器C和D的生物膜团聚体通过29d的驯化培养就达到了一个比较好的净水效果,并能维持稳定状态,相比于一般生物膜反应器的驯化时间有所缩短。不同进水负荷条件下氨氮的去除率变化表明,反应器C和D针对不同进水负荷表现出来的适应效果明显优于其他反应器。
Now people pay more and more attention to the nitrogen pollution in the water due to its severity. As a result, it is important to carry out effective denitrification methods. Biological treatment is efficient and low consumption as a wastewater denitrification method, which has an extremely important position in wastewater treatment field. Microbial aggregates in biological wastewater treatment systems as a response to the core, is a micro-ecological structure which is formed because the co-adsorption of micro-habitats in the nucleus of a variety of microorganisms in water due to mutually beneficial relationship, is one of the most active integral part of the water. It plays a very important role in the purification of water.
This thesis briefly introduces the research process and research findings of biological nitrogen removal technologies at home and abroad and recent advances in the technology, mainly carried out related research and analysis on the influence of the Ca2+ concentration on culture of microbial aggregates in the water.
Cultivating efficient biomembrane aggregate in the international water treatment has been a hotspot of research in recent years. Different amounts of Ca2+ were added in five SBBR reactors (A、B、C、D、E) to search a effective way to cultivate the efficient biomembrane aggregate. The biomembrane aggregate which were cultured under the conditions of 25mg/L Ca2+had a better extrusion ability. The average compressive strength of the biomembrane aggregate reached 22 N/cm2, the density was 1.059g/cm3, and the percentage of activity microorganism in the biomembrane aggregate reached 86.9% which was far higher than the general granular sludge. Analysis the circulated effect, after 29d the biomembrane aggregate in the SBBR C and D had the better effect in wastewater disposal, and the effect could maintain a stable state. Compared to the general biofilm reactor, the domestication time of these reactors was shorter. By changing the hydraulic load and examining the changes of removal rates of ammonia nitrogen, the effect of adaptation by the biomembrane aggregate in the SBBR reactor C and D were better than the other two reactors.
本论文简单介绍了国内外生物脱氮技术的研究过程和研究成果以及该技术的最新研究进展,主要对Ca2+浓度在净水微生物团聚体培养的影响进行了相关的研究与分析。
通过在5组相同型号的SBBR反应器(ABCDE)内调节进水中的Ca2+含量(分别为0、10mg/L、20mg/L、25mg/L、40mg/L),研究Ca2+在净水生物膜团聚体培养过程的作用影响。结果表明,进水Ca2+投加浓度为25mg/L时驯化培养的生物膜团聚体具有较好的抗挤压能力,抗压强度达到了22N/cm2,密度为1.059g/cm3,活性微生物的百分含量达到了86.90%，远远高于一般污泥团聚体中的微生物含量,去除含氮有机物的效率也较高,COD、BOD5的去除效率达到了85%以上。分析运行效果,反应器C和D的生物膜团聚体通过29d的驯化培养就达到了一个比较好的净水效果,并能维持稳定状态,相比于一般生物膜反应器的驯化时间有所缩短。不同进水负荷条件下氨氮的去除率变化表明,反应器C和D针对不同进水负荷表现出来的适应效果明显优于其他反应器。
Now people pay more and more attention to the nitrogen pollution in the water due to its severity. As a result, it is important to carry out effective denitrification methods. Biological treatment is efficient and low consumption as a wastewater denitrification method, which has an extremely important position in wastewater treatment field. Microbial aggregates in biological wastewater treatment systems as a response to the core, is a micro-ecological structure which is formed because the co-adsorption of micro-habitats in the nucleus of a variety of microorganisms in water due to mutually beneficial relationship, is one of the most active integral part of the water. It plays a very important role in the purification of water.
This thesis briefly introduces the research process and research findings of biological nitrogen removal technologies at home and abroad and recent advances in the technology, mainly carried out related research and analysis on the influence of the Ca2+ concentration on culture of microbial aggregates in the water.
Cultivating efficient biomembrane aggregate in the international water treatment has been a hotspot of research in recent years. Different amounts of Ca2+ were added in five SBBR reactors (A、B、C、D、E) to search a effective way to cultivate the efficient biomembrane aggregate. The biomembrane aggregate which were cultured under the conditions of 25mg/L Ca2+had a better extrusion ability. The average compressive strength of the biomembrane aggregate reached 22 N/cm2, the density was 1.059g/cm3, and the percentage of activity microorganism in the biomembrane aggregate reached 86.9% which was far higher than the general granular sludge. Analysis the circulated effect, after 29d the biomembrane aggregate in the SBBR C and D had the better effect in wastewater disposal, and the effect could maintain a stable state. Compared to the general biofilm reactor, the domestication time of these reactors was shorter. By changing the hydraulic load and examining the changes of removal rates of ammonia nitrogen, the effect of adaptation by the biomembrane aggregate in the SBBR reactor C and D were better than the other two reactors.
引文
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