Comprehensive performance evaluation of sludge plate frame pressure filtration dehydration conditioner based on fuzzy analytic hierarchy process
Sludge conditioner is a key factor in improving the efficiency of sludge mechanical dehydration and solidification disposal.There is a lack of comprehensive evaluation methods for screening sludge conditioner.The application effects of 6 conditioners,polyacrylamide(PAM),poly-dimethyl diallyl ammonium chloride(PDDA),polyaluminum chloride(PAC),pulverized fuel ash,commercial consolidation agent and quicklime,in the sludge plate and frame filter pressure dewatering process were compared and studied.The water quality difference of sludge dewatering tailwater under different conditioners was further analyzed.Considering the sludge dewatering effect,sludge dewatering tailwater quality and operation and maintenance investment,the fuzzy analytic hierarchy process was used to evaluate the effect of the conditioner comprehensively.The results showed that quicklime had the best effect on sludge dewatering efficiency,followed by PAC,PDDA and PAM.In terms of sludge dewatering tailwater quality,PAM,PDDA and PAC could significantly reduce the turbidity,COD,total nitrogen and total phosphorus.But quicklime could cause an increase in pH,COD and total nitrogen,causing the deterioration of the sludge dewatering tailwater quality.The evaluation result of the fuzzy analytic hierarchy process showed that PDDA was the best sludge conditioner.This method avoided the one-sided evaluation of conditioners,and provided a basis for the scientific selection of conditioners in the mechanical dehydration process of river and lake sludge.
sludgeconditionerplate and frame filter pressurefuzzy analytic hierarchy processsludge dewatering tailwater
万方数据
维普
