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A device and method for treating landfill leachate of middle and late domestic waste

A technology for landfill leachate and domestic waste, which is applied in the field of landfill leachate treatment devices in middle and late domestic waste landfills, can solve problems such as failure to make full use of coagulation, failure to ensure that effluent discharge meets standards, and failure to effectively remove ammonia nitrogen. , to achieve the effect of small footprint, strong impact load resistance and energy saving

Active Publication Date: 2020-06-19
桂润环境科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing leachate coagulation + acid precipitation + Fenton oxidation treatment technology is only suitable for the treatment of early landfill leachate and its RO membrane concentrate with relatively low concentrations of refractory organic matter and ammonia nitrogen, while for ammonia nitrogen and refractory organic matter content The high-end landfill leachate, this technology cannot make it reach the standard treatment, and this technology does not make full use of the coagulation effect of the remaining iron salt after the Fenton reaction, the consumption of coagulant is high, and the ammonia nitrogen cannot be effectively removed, so it cannot guarantee Effluent up to standard discharge

Method used

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  • A device and method for treating landfill leachate of middle and late domestic waste
  • A device and method for treating landfill leachate of middle and late domestic waste
  • A device and method for treating landfill leachate of middle and late domestic waste

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Effect test

Embodiment 1

[0065] Leachate from a landfill (16 tons / day)

[0066] Processing devices such as figure 1 Shown:

[0067] Water intake: 16 tons / day

[0068] The water quality of landfill leachate influent is shown in Table 1. In Example 1, the influent water quality BOD / COD of landfill leachate is only 0.10, the concentration of ammonia nitrogen>2000mg / L, the concentration of ammonia nitrogen is high, and the biodegradability is poor, which meets the "technical specification for leachate treatment engineering of domestic waste landfill" (HJ564-2010 ) Typical water quality characteristics of domestic waste leachate in the middle and late stages of domestic waste landfills and closed landfills in my country, which is a typical middle and late stage of domestic waste leachate water quality.

[0069] Table 1 Landfill leachate influent water quality

[0070]

[0071] The processing steps are as follows:

[0072] (1) The landfill leachate enters the grid / grid (1) through the leachate inlet ...

Embodiment 2

[0086] Leachate from a landfill (16 tons / day)

[0087] The processing device is also figure 1 Shown:

[0088] Water intake: 16 tons / day

[0089] The water quality of landfill leachate influent is shown in Table 2. BOD / COD is only 0.28, the concentration of ammonia nitrogen is >2500mg / L, the concentration of ammonia nitrogen is high, and the biodegradability is poor. It is also a typical mid-late stage domestic waste leachate water quality.

[0090] Table 2 Landfill leachate influent water quality

[0091]

[0092] The processing steps are as follows:

[0093] (1) The landfill leachate enters the grid / grid (1) through the leachate inlet and enters the collection pool (2) after pretreatment to obtain the pretreated landfill leachate;

[0094] (2) Add acid to the pretreated landfill leachate obtained in step (1) to adjust the pH in the acid analysis device (3) successively, leave it to settle in 1# sedimentation tank (4), separate out humic acid and obtain the above Clea...

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Abstract

The invention provides a treating device and method for middle-and-late-period domestic-garbage-landfill garbage leachate, and belongs to the field of garbage leachate treatment. According to the treating device and method, an ammonia nitrogen removing device and an electrocatalytic oxidation device are arranged behind a Fenton oxidization device, it can be guaranteed that discharged water of themiddle-and-late-period leachate reaches the standard and is discharged, Fenton oxidization serves as pretreatment before electrocatalytic oxidation, most degradation-resistant organic pollutants are oxidized, chain rings of parts of complex organic pollutants are opened, retention time of electrocatalytic oxidation is shortened, the working current density is reduced, and electric energy is saved;through the ammonia nitrogen removing device, pollutants such as ammonia nitrogen extremely consuming electric energy are reduced, and power consumption of electrocatalytic oxidation treatment is further reduced.

Description

technical field [0001] The invention relates to the technical field of landfill leachate treatment, in particular to a treatment device and method for leachate of middle and late domestic waste landfills. Background technique [0002] Due to the limitation of economic development and technical level, domestic waste in most areas of the country is mainly disposed of through landfill. During the landfill process of domestic waste, a large amount of landfill leachate containing organic matter, ammonia nitrogen and heavy metals will be produced. Especially in the middle and late stage leachate, the composition is complex, the biodegradability is poor, the concentration of ammonia nitrogen and salt is high, and the color is deep, which makes its treatment difficult and complicated. [0003] At present, for the middle and late stage landfill leachate, the widely used treatment process is: biochemical + membrane filtration treatment combination process, the hydraulic retention time...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F101/30
CPCC02F1/001C02F1/20C02F1/4672C02F1/56C02F1/66C02F1/722C02F9/00C02F2001/007C02F2101/30C02F2303/04C02F2305/026
Inventor 张小平梁剑成李航覃理嘉郭安剑张志娟黄光苠杨芳显奚益翔蒋衡
Owner 桂润环境科技股份有限公司
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