Garbage transfer station leachate treatment integrated device and method

Abstract

The invention discloses a garbage transfer station leachate treatment integrated device, which comprises a pretreatment unit, a biochemical treatment unit and a sludge treatment unit, the pretreatment unit comprises an adjusting tank, a reaction tank and an air floatation tank, the outlet of the adjusting tank is connected with the inlet of the reaction tank, and the outlet of the reaction tank is connected with the inlet of the air floatation tank; the biochemical treatment unit comprises an MABR tank, an MBBR tank and an MBR tank, an outlet of the floatation tank is connected with an inlet of the MABR tank, an outlet of the MABR tank is connected with an inlet of the MBBR tank, an outlet of the MBBR tank is connected with the MBR tank, and a first outlet of the MBR tank is connected with an inlet of the MABR tank; the sludge treatment unit comprises a sludge thickening tank and a sludge dewatering machine. The invention further discloses a garbage transfer station leachate treatment method. According to the method, the MABR, MBBR and MBR combined process is adopted as the method for removing the organic matters, ammonia nitrogen and total nitrogen in the leachate of the waste transfer station, so that the method is safe and efficient; the integrated treatment device disclosed by the invention is high in integration degree, small in occupied area and convenient to mount.

Description

technical field [0001] The invention relates to the field of leachate treatment, in particular to an integrated device and method for leachate treatment in a garbage transfer station. Background technique [0002] The garbage transfer station is an indispensable link in the collection, transportation and disposal system of urban domestic waste. It is an important hub for garbage collection and treatment. After the garbage is mechanically compressed in the transfer station, it is transferred to the terminal processing system by garbage trucks. A certain amount of landfill leachate will be produced in the process of garbage filling, compression and transfer in the garbage transfer station. According to statistics, the waste water generated in the garbage transfer station is about 10% of the garbage transfer volume. The leachate pollutant composition of the garbage transfer station is complex and changeable, and the concentration of organic matter, ammonia nitrogen, grease and ...

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Problems solved by technology

[0006] In view of the above-mentioned leachate treatment methods and systems in the garbage transfer station, the current treatment of the leachate in the garbage transfer station has the following problems: anaerobic treatment units are often used for high COD, and the biogas generated is flammable and explosive gas. Whether it is directly Combustion or collection for reuse, there are certain safety hazards and secondary pollution, and the volume of the anaerobic device is large; A / O process is often used for high total nitrogen and ammonia nitrogen, the wastewater stays for a long time and occupies a large area , the nitrogen removal effect is unstable, and there is a risk that the total nitrogen and ammonia nitrogen will not meet the standards; when the existing advanced treatment processes such as nanofiltration, reverse osmosis, etc. are used, the operation management is complicated, the operation cost is high, the water production rate is not high, and the produced membrane The concentrated solution is difficult to handle and the cost is high; the processing process is complex, and the device occupies a large area, which is not suitable for the built waste transfer station that occupies a tight area

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