Study on the Immobilization of the Effective Microorganisms Using Biological Activated Carbon

生物活性炭固定化有效微生物的研究

基本信息

批准号：
05680478
负责人：
SUDO Ryuichi
金额：
$ 1.22万
依托单位：
TOHOKU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05680478/
关键词：
Biological activated carbon Raw water Attached bacteria Protozoa Rotatoria Nematoda Philodina 二者培養消毒

项目摘要

In order to investigate the relation ship between treatment efficiency and operation conditions, characteristics of attachment and desorption of biofilm, and the immobilization of microorganisms on the biological activated carbon. A series of pilot plants called the biological activated carbon fluidized bed process were installed, and the real polluted lake waters (SS=15mg/l, COD=8mg/l) were used in these pilot plant experiments. The result obtained through this experimental study may be summarized as follows.The treatment efficiency for organic matter such as TOC and DOC was found to be increased if the hydraulic retention time (HRT) increased, while the HRT was increased from 0.5 to 2 hours. It was recognized that HRT=1 hour was more reasonable in this process, and the removal of TOC and DOC was more than 40%. In the meantime the removals of SS,ammonium nitrogen and algae were found to be 50%, 55% and 50%, respectively. Although the treatment efficiency decreased after some periods of operation, it can be recovered through the proper backwash by the combination of water and air every two weeks.10 species of Flagellate, 17 Ciliata, 17 Sarcodina, ( Metazoa (including Rotatoria, Nematoda, Oligochaeta) were investigated in the fluidized bed process. The dominant species were found to be Monas, Vorticella, Epistylis, Stentor and Philodina, and the maximum population was 500/ml. Nematoda was found to be an obstruct organism, its control is still being studied. Pseudomonas, Alcaligenes, Acinetobacter etc. were lso recognized, the population reached to 10^7-10^8/ml.It was verified that the treated water by this process could be used as a source of raw water for water supply.

目的探讨处理效率与运行条件的关系、生物膜的附着与解吸特性以及微生物在生物活性炭上的固定化情况。安装了一系列称为生物活性炭流化床工艺的中试装置，并在这些中试装置实验中使用了真实的污染湖水（SS=15mg/l，COD=8mg/l）。通过本实验研究获得的结果可概括如下。发现如果水力停留时间（HRT）增加，则有机物（例如TOC和DOC）的处理效率增加，而HRT从0.5小时增加到2小时。认为该过程中HRT=1小时更为合理，TOC和DOC的去除率均在40%以上。同时，SS、铵态氮和藻类的去除率分别为50%、55%和50%。虽然运行一段时间后处理效率有所下降，但通过每两周水与空气结合进行适当的反冲洗即可恢复。鞭毛虫10种，纤毛虫17种，肉虫17种，后生动物（包括轮虫纲，线虫纲，少毛纲） )在流化床过程中进行了调查，发现优势物种为 Monas、Vorticella、Epistylis、Stentor 和 Philodina，最大种群为500/ml。线虫被发现是一种阻碍生物，其控制仍在研究中，假单胞菌、产碱杆菌、不动杆菌等也已被确认，数量达到10^7-10^8/ml。经验证，经该工艺处理后的水可作为供水原水源。