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Rural sewage has been treated by using the use of artificial soil rapid infiltration system, after 12 days the CRI complete to start. The impact of soil column height and soil-sand ratio was studied to removal ratio of sewage, the results showed that the best soil column height was 500mm, total nitrogen removal rate can reached 64%. When the soil-sand ratio was 1:1, removal rate of COD and TN were...
The pollution of the Yangtze river is becoming more and more serious, but there is much uncertain inkling in the evaluation of the Yangtze river which makes it difficult to get the integrated evaluation. The fuzzy recognition sets out its objectivity and practicability during treating with multi-inklings. This paper sets up the fuzzy attenuation model by using the fuzzy recognition and considering...
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