科研之友
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摘要
The activated sludge process is one of the most used procedures for removing organic materials and nutrients from wastewater. In this article, microbiological monitoring was applied to supervise the functioning of an activated sludge plant. Samples were taken weekly at three points: aeration tank, returned sludge and effluent. Identification of four functional groups of microorganisms, Gram-positive and Gram-negative bacteria, protozoa, metazoa and algae in fresh specimen investigation were used to assess the performance of the plant. The results revealed that initially there were undesirable microorganisms in the aeration tank and in the returned sludge. The density of these organisms was reduced and replaced by Gram-negative bacteria, ciliates, rotifers and nematodes, which was an indication of stabilization. The microbiological analysis using groups of microorganisms for assessment of the functioning of the activated sludge plant proved to be a reliable, simple and inexpensive method for monitoring the start-up and operation of plants.
- 出版日期2016-12
