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Treatment system and method for realizing zero emission of landfill leachate and fermented biogas slurry

A technology of landfill leachate and treatment system, which is applied in the field of treatment system to realize zero discharge of landfill leachate and fermentation biogas slurry, can solve the problems of underutilization of valuable resources, complicated and lengthy process, poor biodegradability, etc. The effect of solving the problem of wastewater pollution, low energy consumption and suitable carbon-nitrogen ratio

Pending Publication Date: 2020-12-29
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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Problems solved by technology

[0004] The purpose of the present invention is to provide a treatment system and method for realizing zero discharge of landfill leachate and fermented biogas liquor, so as to solve the problems existing in the prior art, such as complex and lengthy process, easy clogging of membrane, high energy consumption, poor biodegradability, waste water Valuable resources have not been fully utilized and other issues, starting from how to improve the biodegradability of landfill leachate and fermented biogas liquor to effectively remove ammonia nitrogen and COD in wastewater, seek low energy consumption for treatment, and realize the recycling and utilization of wastewater. Zero-emission process method

Method used

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  • Treatment system and method for realizing zero emission of landfill leachate and fermented biogas slurry

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Embodiment 1

[0035] A method for treating landfill leachate and fermented biogas slurry using a treatment system for realizing zero discharge of landfill leachate and fermented biogas slurry according to the present invention comprises the following steps:

[0036] (1) The fresh wastewater composed of landfill leachate and fermented biogas slurry is sent from outside to the buffer tank 1, and then sent to the feed water preheater (plate-and-frame heat exchanger) 3 by the feed pump 2, where Perform heat exchange with the condensate of the MVR steam generated by the MVR evaporator 9, and further cool the MVR condensate while initially preheating the waste water to obtain preheated waste water;

[0037] (2) The preheated waste water is sent into the tower from the waste water inlet on the upper part of the analysis tower 4, and the stripping distillation process is adopted in the analysis tower 4 to strip part of the ammonia nitrogen in the waste water to obtain the stripped waste water; The ...

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Abstract

According to the treatment system and method for realizing zero emission of the landfill leachate and the fermented biogas slurry. The landfill leachate and the fermented biogas slurry are subjected to thermal extraction twice, most ammonia nitrogen in the wastewater is removed, and ammonia water is obtained after condensation; residual ammonia nitrogen and volatilizable small molecular COD in thewastewater are removed by adopting a mechanical vapor recompression technology (MVR for short) and a forced circulation flash evaporation technology, and the wastewater is fed into a biochemical reactor for biochemical treatment to obtain regenerated return water; and innocent treatment is performed on the residual high-concentration waste liquid. Therefore, zero emission of landfill leachate andfermented biogas slurry is realized. By adopting the system and the method disclosed by the invention, the wastewater can be completely recycled, the zero-emission treatment of high-ammonia-nitrogenand high-COD landfill leachate and fermented biogas slurry is realized, the biodegradability of the wastewater is improved, the produced ammonia water can bring certain economic benefits, the operation and investment cost of the system is reduced, the heat energy in the system is repeatedly recycled, and the system has the characteristics of low energy consumption, and high efficiency.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment and resource utilization, in particular to a treatment system and method for realizing zero discharge of landfill leachate and fermented biogas slurry. Background technique [0002] Landfill leachate and fermented biogas slurry is a kind of high-concentration organic wastewater, which has high salt content, high chloride ion height, high COD concentration, high ammonia nitrogen content, complex composition, serious imbalance of microbial nutrient elements, difficult to degrade, and poor biodegradability , which is difficult to treat wastewater. In view of the characteristics of high COD, ammonia nitrogen and salt content in landfill leachate and fermented biogas slurry, the current domestic treatment methods for this type of wastewater mainly include: coagulation sedimentation, membrane desalination, stripping deamination, evaporation crystallization, biochemical treatment Wait. [...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/16C02F103/06
CPCC02F9/00C02F1/041C02F1/10C02F1/20C02F1/06C02F3/00C02F2101/16C02F2103/06C02F2301/08
Inventor 熊建英程雪婷李武东
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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