ACTIVATED-SLUDGE PROCESS RESPONSE TO VARIABLE INPUTS OF VOLATILE ORGANIC CONTAMINANTS

被引:8
作者
MELCER, H
NUTT, SG
MONTEITH, H
机构
[1] CH2M HILL ENGN LTD,WATERLOO N2H 5M5,ONTARIO,CANADA
[2] ONTARIO MINIST ENVIRONM,TORONTO M4C 1P5,ONTARIO,CANADA
关键词
NONSTEADY STATE; DYNAMIC; REMOVAL; VOLATILE ORGANIC CONTAMINANTS; ACTIVATED SLUDGE; BIODEGRADATION; STRIPPING; MECHANISMS;
D O I
10.2166/wst.1991.0434
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Laboratory-scale activated sludge treatment systems were operated under dynamic loading conditions to investigate the non-steady state behaviour of volatile organic contaminants (VOCs) under controlled conditions. Four step tests were conducted in which an incremental increase in the concentrations of selected contaminants was applied to the reactor feed from background levels of about 15 mu-g/L to levels of about 100 mu-g/L for a duration of approximately three hydraulic retention times. Although it was not possible to define the relative contributions of stripping and biodegradation to the removal of the test VOCs, different mechanisms are responsible for the removal of short-term, non-steady state inputs of chlorinated and non-chlorinated VOCs. No apparent effect of SRT or HRT on VOC removal was observed at the conditions tested.
引用
收藏
页码:357 / 365
页数:9
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