Design Of Process Systems For Leachate Treatment Plant Of Waste Treatment Plant In DongGuan City

Landfill leachate is a kind of organic wastewater with imbalance microbial nutrientelements, huge changes of water quality and quantity and high organic concentration, whichis hard to treat. Owing to the complex composition, huge toxic and high pollutants concentration, landfill leachate can exist in the environment for quite a long time. If onlyconsider its natural degradation, at least needs15years for the concentration reducing to thenational emission standards. In order to eliminate the risks and effects of leachate on humanand ecological environment, urban garbage treatment plant in Dongguan to be build a leachatetreatment station, which treatment capacity of300m3/d in the factory. Landfill leachategenerated by the waste treatment station to achieve the water quality standard of open-cyclecooling water system what "The reuse of urban recycling water--water quality standard forindustrial uses"(GB/T19923-2005) requirements, to supplement, pay, as a cooling tower ofthe factory ground Rinse, green plant, flushing with that reuse water.According to the scale of the project processing and the water quality characteristics oflandfill leachate from Dongguan city, based on reference to several domestic wasteincineration plants using landfill leachate treatment process, to compare the effect of thetreatment process, choose a treatment effect of a process close to the works deal with the goalto make appropriate improvements, and process and process equipment, more in line with theactual engineering of the treatment process, the treatment effect can meet the engineeringrequirements for the water quality standards. Comparison and selection with the technologyand the treatment effect, and selects the treatment process of "the engineering and flotation+regulation the pool+UASB reactor+MBR system+NF/RO system " ultimately. In thispaper,it is be presentation and display of the design process and design of the landfill leachatestation main process systems and auxiliary systems results detailed.During design the Leachate treatment station of the waste treatment plant processsystems and auxiliary systems, in order to make this project landfill leachate treated effluentquality to meet the requirements, Dongguan garbage characteristics, designer improvementsthe following traditional infiltration of the filtrate treatment process and equipment:1, the plant industrial garbage more suspended particulate matter in the landfill leachate,especially if using conventional coagulation and sedimentation processes running unstable,often difficult to precipitate a large number of suspended solids, the opposite of thesesubstances was easy to go up. This project uses the flotation process. 2, Regulation pool generally regulate the water quantity and quality in the the traditionallandfill leachate processing, generally relatively large volume. This project makes full use ofthe advantage regulation pool large volume set acidified hydrolysis in the regulation of thepool, in the case of regulation pool features of landfill leachate hydrolysis, to lighten the loadof the follow-up treatment facilities.3, UASB anaerobic reactor biogas produced by the biogas collection system to collecthigh-energy ignition device after combustion altitude emissions, unlike traditional as allowbiogas in a UASB reactor natural distribution only pollute the surrounding environment affecthuman health.4, Nitrifying pool blowing pressurized the jet aerator aeration (pool to install jet aerationand enhanced nozzle), oxygen utilization increased to30%from the traditional15%.The leachate treatment process system has been applied in the transformation of theleachate treatment plant in Dongguan Hengli incineration plant, after the field measurement,the leachate generated in the incineration plant after processing through the process to achievethe water quality standards of open loop cooling water system what "The reuse of urbanrecycling water--water quality standard for industrial uses "(GB/T19923-2005) requirements,back for the greening of the plant’s water. That Prove the process is feasible and can be usedfor the treatment of landfill leachate.