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Technological Research on Recovery and Treatment of Waste Water and Sludge in Water Supply Plant

Author: PanYanQiu
Tutor: HuoMingZuo
School: Northeast Normal University
Course: Environmental Science
Keywords: Waterworks Sludge Membrane separation technology Submerged hollow fiber membrane
CLC: X703
Type: Master's thesis
Year: 2009
Downloads: 202
Quote: 3
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Abstract


China's annual water discharge to wastewater sludge up to 15 billion cubic meters of waste water treatment plant in Jilin Province to the annual emissions of 35 million cubic meters of sludge . First, this part of the disposal of sewage sludge or sewage directly discharged into the sewage treatment plant mixed after discharge , the second is reused. The former method is not only a waste of a lot of water , but also causes environmental pollution ; latter in turn cause some pollutants (microbiological and chemical substances ) accumulation , and these contaminated substances may exceed the capacity of water that can be processed , deterioration of water quality, thus affecting people's health . Thus waterworks sludge water recycling issues , has become an important field of water treatment research . In this thesis, Changchun City, the third row of muddy water purification plant as the research object , its use of membrane separation technology for recycling technology research . Examine the treatment effect of membrane modules , operating characteristics and other aspects of the similarities and differences in order to determine the appropriate type of membrane work ; investigate membrane clogging law ; study to determine the best treatment system operating parameters ; study to determine the membrane cleaning methods. Experimental results show that immersion hollow fiber membrane suspended particles and colloids have the desired retention effect , suspended particles and colloidal membrane retention rate greater than 99% ; film on iron removal effect is obvious, the treated effluent iron content of basic lt; 0.05 mg / l, the maximum I iron content of 0.08mg / l, far less than the drinking water quality standards ; membrane removal of organic molecules is not obvious, and because aeration and nitrification short time, so that filtered water effluent ammonia levels increased ; submerged hollow fiber membrane treatment apparatus normal sludge sedimentation tank , the effluent bacteria more stable, and basically meet drinking water quality standards ; submerged hollow fiber membrane treatment apparatus requires the use of chemical agents to take counter-current membrane surface cleaning, chemical cleaning can be the membrane flux recovered to test at the beginning of membrane flux , recovery rate of 99% . The process has a better treatment effect . Process optimization parameters - Water Treatment Flow :1.4-2m ~ 3 / h; membrane flux :28-40 L / m ~ 3h; fan frequency :26.68-30Hz; intermittent operation : suction pump run for 30 minutes , stop for 30 seconds ; filtration cycle : 30 minutes ; chemical cleaning cycle :2- March .

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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