Treatment of intermittently flowing wastewaters
作者:
MenmetAli Yükselen,
期刊:
Journal of Environmental Science and Health, Part A
(Taylor Available online 1998)
卷期:
Volume 33,
issue 1
页码: 97-110
ISSN:1093-4529
年代: 1998
DOI:10.1080/10934529809376720
出版商: Taylor & Francis Group
关键词: Intermittently flowing wastewaters;sedimentation;packed column
数据来源: Taylor
摘要:
Conventional biological treatment of intermittently flowing wastewaters is one of the significant problems of regions having seasonal activities. A system consisting of an downflow aerated packed reactor (DAPR) followed by inclined tube settler (ITS) was tried to overcome the difficulties for the above mentioned wastes. The DAPR‐ITS system can be regarded as a combination of activated sludge and trickling filter process followed by a high rate sedimentation unit (ITS). Three different no‐feed periods ranging from 3 to 26 weeks were used to characterize the off‐season activities. After this no‐feed period the system was started using different flow rates. The performance of the system was evaluated using chemical oxygen demand (COD), biochemical oxygen demand (BOD), nitrogen (N), phosphate (P) and total suspended solids (TSS) parameters. The results showed that DAPR‐ITS achieved about 80 % COD removal efficiency from the time of starting the system and reached steady state conditions within a few days. The removal efficiencies of other parameters had similar trends as COD. Thus, DAPR‐ITS system has been proven to be a satisfactory method for intermittently flowing wastewaters.
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