256results about How to "Reduce dilution" patented technology

The invention provides a dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and a method thereof. The method adopts processes of hydrolysis acidification, multilevel series contact aeration and dephosphorization and denitrification A<2>/O of continuous flow, and comprises the following steps that: a hydrolysis acidification unit is used to treat raw sewage and a little anaerobic phosphorus releasing sludge to realize conversion of VFA; clear solution rich in the VFA after hydrolyzed supplies rich carbon sources for a subsequent dephosphorization and denitrification A<2>/O unit to reinforce synchronous dephosphorization and denitrification; and low concentration phosphorus in the sewage is enriched in the anaerobic phosphorus releasing sewage by the excessive phosphorus absorption capability of a phosphate accumulating organism, and the minor part of phosphorus enriched sewage is drained to carry out chemical phosphorus solidification. The dephosphorization mode can significantly reduce sewage quantity of chemical dephosphorization, improve the utility ratio of a dephosphorizing medicament, reduce dosage of the medicament, has high phosphorous amount in the obtained chemical sludge, and realizes recycle of the middle and low concentration phosphorus in urban sewage by the mode of non residue sludge under a condition of low cost. Sludge decrement can be realized through biofacies separation of a multilevel series contact aeration tank and the function of microorganism predation grade by grade.