Application of the Combination Process of"Flocculation Dehydration+High-Pressure Belt Conveyor+Aerobic Fermentation"in the Treatment of Fecal Sludge
A fecal treatment station in Hebei Province collects and treats fecal wastewater generated by nearby schools,and originally uses the"flocculation dehydration+aerobic fermentation"process to treat fecal sludge to a moisture content of about 84%,and then carries out aerobic fermentation composting.However,direct aerobic fermentation of feces with a moisture content of 84%requires the addition of a large amount of auxiliary materials,which poses problems such as easy solidification of compost materials,low oxygen mass transfer efficiency,and high operating costs,affecting the quality of compost products.In order to improve the aerobic fermentation efficiency of fecal sludge and reduce operating costs,a high-pressure belt deep dehydration process is added to the back end of the original dehydration process and the front end of the aerobic fermentation process,while fully utilizing the existing equipment and site.The continuous operation results of this project show that after being treated with high-pressure belt deep dehydration technology,the average moisture content of feces has decreased from 84%to 59%,the fecal reduction rate has reached 61%,and 90%of auxiliary materials have been saved,after the transformation,the fecal reduction effect and economic benefits are significant.
flocculation dehydrationhigh pressure belt conveyoraerobic fermentationdeep dehydrationfecal sludgedecrement
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