DETERMINATION OF ORGANIC LOADING RATE OF ACTIVATED-SLUDGE PLANTS BASED ON PROTOZOAN ANALYSIS

被引:45
作者
SALVADO, H
GRACIA, MP
机构
[1] Department of Animal Biology, Biology Faculty, University of Barcelona, 08028 Barcelona
关键词
ACTIVATED SLUDGE; ORGANIC LOADING RATE; PROTOZOA; CILIATES; DIVERSITY;
D O I
10.1016/0043-1354(93)90154-A
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Variations in the structure of the protozoan community living in activated sludge were studied in relation with the organic loading rate. 84 samples were taken over a 14 month period. Sludge and wastewaters were subjected to microscopic and physico-chemical analyses. The organic loading rate corresponding to each microscopic count was determined as the average of the values calculated for the 2 days previous to the count. Ciliate species abundance and specific diversity of ciliates were strongly related to the organic loading rate. Data were compared to three other facilities. Ciliate diversity decreased as the organic loading rate increased. This relationship could be modified if solids in suspension surpassed 4000 MLVSS mg/l or if volumetric loading rates were higher than 800 g BOD5/m3 day. An easy, fast diagnostic test to estimate the organic loading rate in less than 5 days and to obtain information on plant performance is proposed.
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页码:891 / 895
页数:5
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