Studies on the Rational Operation of Rural Wastewater Treatment Plant

农村污水处理厂合理运行研究

• 批准号: 02454085
• 负责人: TAKAHASHI Tsuyoshi
• 金额: $ 0.9万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02454085/
• 关键词: Wastewater treatment; Contact aeration process; Nitrogen removal; Nitrification; Large Metazoa; 後生動物; マキガイ; ミミズ; ミズムシ

The contact aeration process with anaerobic filter tanks is frequently used in small-scale wastewater treatment plant in rural areas. In this study, the experiments were carried out in the actual and the model plants, and the Quantification analysis was also used in order to find the appropriate operating method for the nitrogen removal of this process. The results are as follows:1)When large Metazoa such as asellus and physa have bred in large quantities on the contactors of aeration tanks, they have an unfavorable influence on the progress of nitrification.2)Since the mass breeding of large Metazoa used to occur periodically from autumn to winter, it is important to prevent their mass breeding in autumn.3)The back washing of the contactors can restrain their mass breeding to some extent, but the stopping of aeration of two days is needed to control them perfectly.4)To advance the nitrification in the aeration tanks, operating attention should be paid to many factors, such as water temperature, DO concentration of aeration tank, BOD loading of aeration tank, returned water ratio, specific surface area of the contactors.5)Discontinuation of aeration less than four hours in midnight of no inflow can save energy without deterioration of the treatment.

厌氧滤池接触曝气工艺是农村小型污水处理厂常用的曝气工艺。在本研究中，分别在实际工厂和模式工厂进行了实验，并采用了量化分析的方法，以寻找适合该工艺脱氮的操作方法。结果表明：1)在曝气池的接触器上大量繁殖大型后生动物（asellus、physa），对硝化过程的进行有不利影响。2)由于大型后生动物的大规模繁殖通常在秋季至冬季周期性发生，因此防止秋季大规模繁殖是重要的。3)对接触器进行反冲洗可在一定程度上抑制其大量繁殖，但需停止曝气2天才能完全控制。4)为推进曝气池的硝化，操作中应注意水温、曝气池DO浓度、曝气池BOD负荷、回水比、接触器比表面积等因素。5)在无入流的半夜停止曝气少于4小时，既节约能源又不影响处理效果。

项目成果

Haruta,S.: "Studies on the nitrogen removal by the contact aeration process with anaerobic filter tanks in small scale domestic wastwater treatment plants." Water Science and Technology.

Haruta,S.：“小型生活污水处理厂中厌氧过滤池接触曝气工艺脱氮的研究。”

Haruta,S.: "Studies on the nitrogen removal by the contact aeration process with anaerobic filter tanks in small scale domestic wastewater treatment plants." Water Science and Technology.

Haruta,S.：“小型生活污水处理厂中厌氧过滤池接触曝气工艺脱氮的研究。”

高橋 強: "接触曝気法の硝化反応に及ぼす影響因子の解析" 農業土木学会誌. 60. 452- (1992)

Tsuyoshi Takahashi：“接触曝气法硝化反应的影响因素分析”日本农业土木工程学会杂志60。452-（1992）。

高橋 強: "接触曝気法の硝化反応に及ぼす影響因子の解析" 農業土木学会誌. 60. 452 (1992)

高桥刚：“接触曝气法硝化反应的影响因素分析”日本农业土木工程学会杂志60。452（1992）。

Takahashi,T.: "Analysis on the factors affecting on the nitrification in contact aeration process." J. of Japanese Soc. Irri. Drain. and Recram. Eng.Vol.60. 452 (1992)

Takahashi,T.：“接触曝气过程中硝化作用的影响因素分析”。