文章基本信息

标题：Wastewater Treatment at a “Sozai” Processing Plant (II)
本地全文：下载
作者：Kazuhiro TAKAMIZAWA ; Zensuke INOUE
期刊名称：生活衛生
印刷版ISSN：0582-4176
电子版ISSN：1883-6631
出版年度：1986
卷号：30
期号：4
页码：201-204
DOI：10.11468/seikatsueisei1957.30.201
出版社：Osaka Urban Living and Health Association
摘要：Filtration, chemical coagulation and activated sludge process are applied to wastewater from a “Sozai” processing plant. Filtration was performed through the rotating sieve to which 250-mesh nylon cloth was firmly attached. The removal rates of SS, COD and BOD were 95.4%, 62.9% and 63.4%, respectively, and the specific filtration area was 0.5m²/l. The BOD removal was represented well in terms of the first-order reaction kinetics and the calculated value of the BOD removal coefficient was 6.3×10^-5 (1/mgSShr). After the activated sludge treatment, the chemical coagulation was tested. In the chemical coagulation, 500mg/l of FeCl₃ was added and pH was adjusted at 6.5 by the addition of a NaOH solution. Then, the mixture was stirred for 3min. at 150rpm and for 10min. at 30rpm in a jar tester. The coagulation efficiency was marked more than 90% if the subject was pretreated for 12hr or more by activated sludge. The final COD and BOD were below 28mg/l and 5.1mg/l, respectively.