What is the treatment process of leachate in the domestic waste landfill?
What is the treatment process of leachate in the domestic waste landfill? Author: landfill leachate treatment is part of wastewater treatment, composition and complexity, can be as low biodegradability. As a result, the treatment of landfill leachate is difficult and the process is complicated. The following is the environmental protection·environment editor to introduce you to the leachate treatment steps of the domestic waste landfill. (1) The landfill leachate enters the grid/grid through the leachate inlet, and enters the collection tank after pretreatment to obtain the pretreated landfill leachate. (2) The pre-treated landfill leachate is sequentially subjected to pre-denitrification in the first-level anoxic tank, aerobic treatment in the aerobic tank, and endogenous denitrification in the second-level anoxic tank to obtain internal Source denitrification effluent, part of the internal denitrification effluent passes through the return outlet and the mixed liquid return pump, and returns to perform pre-denitrification, and part passes through the outlet, enters the first MBR system, undergoes the first MBR treatment, and obtains the first MBR The effluent and the first MBR sludge, the first MBR sludge part is returned through the sludge return port and the sludge return pump for aerobic treatment, and the remaining sludge enters the sludge after passing through the sludge outlet and the first remaining sludge pump The dewatering system performs sludge dewatering. (3) The obtained first MBR effluent enters the intermediate tank and then enters the screening system for membrane screening to obtain high-concentration wastewater containing macromolecular organics and low-concentration wastewater containing small molecular organics. (4) The obtained high-concentration wastewater containing macromolecular organics enters the macromolecule electrocatalytic oxidation device to perform macromolecule electrocatalytic oxidation to obtain macromolecule electrocatalytic oxidation wastewater. The preoxidized wastewater of the macromolecule electrocatalytic oxidation wastewater is processed The pre-oxidation outlet is refluxed for pre-denitrification, and the thoroughly oxidized wastewater of the macromolecular electrocatalytic oxidation wastewater enters the second MBR system through the thorough oxidation outlet for the second MBR treatment to obtain the second MBR effluent and the second MBR sludge. The second MBR sludge enters the sludge dewatering system for sludge dewatering after passing through the second remaining sludge pump (17), and the second MBR effluent enters the disinfection tank through the water outlet for disinfection and is discharged through the discharge port. (5) The obtained low-concentration wastewater containing small-molecule organics enters the small-molecule electro-catalytic oxidation device to perform small-molecule electro-catalytic oxidation to obtain small-molecule electro-catalytic oxidation wastewater, and the small-molecule electro-catalytic oxidation wastewater enters the disinfection tank for disinfection Then discharge through the discharge port.
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