Some aspects of the microbiology of activated carbon columns treating domestic wastewater
Some aspects of the microbiology of activated carbon columns treating domestic wastewater
复制标题
活性炭柱处理生活废水的微生物学的一些方面
DOI：
10.1021/es60158a014
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发表时间：
1979
影响因子：
11.4
通讯作者：
A. Benedek
中科院分区：
文献类型：
--
作者：
Alina Latoszek;A. Benedek
通过显微镜观察和文化调查，分析了在25和5 ℃下处理混凝、沉降和砂滤生活污水的两组试验工厂柱的活性炭样品。检测到细菌的广泛生长，每克湿排碳高达109个活细胞。大多数分离物被分类为属于假单胞菌属和黄杆菌噬纤维菌组。有较高比例的细菌具有分解能力。在25 C柱组的铅柱中发现线虫，而在5 C柱组的铅柱中发现鞭毛虫和阿米巴。活性炭吸附器中的微生物在性质和数量上与活性污泥厂混合液中的微生物相似。近年来，污水的“物理-化学处理”（PCT）作为传统生物处理的替代方法越来越受到重视。在PCT中，活性炭柱用于去除可溶性有机物。最初，去除仅归因于物理吸附，并努力使微生物生长最小化。然而，这些努力通常都失败了，关于试验工厂运行的报告指出，在这些柱中有相当多的生物活性。随着中试工厂研究的继续，观察到碳柱负载比仅通过非生物吸附可获得的最大值高许多倍（1-3），因此，生物方法现在被认为在使碳吸附具有成本效益方面起着极其重要的作用。此外，有人声称，AC为细菌生长提供了一种极好的支持介质，因为碳表面可以浓缩底物，用于随后的微生物分解。Kalinske（4）以及后来的Pirotti和Rodman（5）声称，生物体显示出增加的底物
Activated carbon samples from two sets of pilot plant columns treating coagulated, settled, and sand-filtered do-mestic wastewater at 25 and 5 C were analyzed by micro-scopic observations and cultural investigations. Extensive growth of bacteria up to 109 viable cells per g of wet drained carbon was detected. The majority of isolates were classified as belonging to the genus Pseudomonas and to theFlavo-bacterium-Cytophaga group. A high percentage of the bac-teria exhibited denitrifying ability. Nematoda were found in the lead column of the 25 C set of columns, while Mastigophora and Amoeba were present in the lead column of the 5 C set of columns. The nature of microbial life in activated carbon adsorbers appears to be similar in nature and number to that of the mixed liquor in activated sludge plants.In recent years, the “physical-chemical treatment”(PCT) of sewage has been gaining increasing prominence as an al-ternative to conventional biological treatment. In PCT, activated carbon columns are used to remove soluble organics. Initially, removal was attributed to physical adsorption alone, and efforts were made to minimize microbial growth. These efforts, however, usually failed, and reports on pilot plant operations noted considerable biological activity in such col-umns. As pilot plant investigations continued, carbon column loadings were observed to be many times higher than the maximum obtainable by nonbiological adsorption alone (1-3), and, as a result, biological processes are now considered to play an extremely important part in making carbon adsorption cost effective. Furthermore, there havebeen claims that AC presents an excellent support medium for bacterial growth, as the carbon surface can concentrate substratesfor subsequent microbial decomposition. Kalinske (4) and later Pirotti and Rodman (5) claimed that organisms show increased substrate