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Garbage percolate treatment technology

A technology for landfill leachate and treatment process, applied in the field of high-concentration organic wastewater treatment, can solve problems such as failure to meet national sewage discharge standards, membrane easily polluted, system instability, etc., to improve biochemical efficiency and membrane anti-pollution performance, water quality. Stable, low inflow requirements

Active Publication Date: 2011-08-31
JIANGSU JIUWU HITECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical purpose of the present invention is to provide a new landfill leachate treatment process for the disadvantages that the membrane of the MBR process is easy to pollute and the system is unstable, and the general treatment process cannot meet the requirements of the national sewage discharge standard. Advanced treatment of landfill leachate to meet national discharge requirements

Method used

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  • Garbage percolate treatment technology
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Examples

Experimental program
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Effect test

Embodiment 1

[0032] Take the treatment method of landfill leachate in Jiangning area of ​​Nanjing as an example:

[0033] (1) Pretreatment: transport the collected landfill leachate to the adjustment tank for sedimentation or sedimentation treatment;

[0034] Wherein, the total residence time of the landfill leachate in the regulating tank is 12 days.

[0035] (2) Anaerobic treatment: The supernatant of the landfill leachate is pumped and transported to the upflow anaerobic sludge bed (UASB) for anaerobic reaction to generate biogas, sewage and sludge.

[0036] (3) Gas-enhanced ceramic membrane bioreactor treatment: The sewage obtained after anaerobic treatment is sent to the ceramic membrane MBR system for treatment. The sewage is first transported to the A / O tank, where denitrification reaction is carried out in the denitrification tank, and the denitrified sewage overflows into the nitrification tank for nitrification reaction, and the sludge concentration in the A / O tank is controlled...

Embodiment 2

[0044] The concrete method of the present embodiment and detection are identical with embodiment 1, only change operating parameter as follows:

[0045]The total residence time of the landfill leachate in the regulating tank is 10 days; the filtration precision of the inorganic ceramic membrane ultrafiltration membrane is 20 nm; The aeration rate is 30%; the flow rate of the ultrafiltration membrane in the tubular membrane equipment for solid-liquid separation of sewage is 1 m / s, and the operating pressure is 0.5MPa.

Embodiment 3

[0047] The concrete method of the present embodiment and detection are identical with embodiment 1, only change operating parameter as follows:

[0048] The total residence time of the landfill leachate in the regulating tank is 15 days; the filtration accuracy of the inorganic ceramic membrane ultrafiltration membrane is 500 nm; The aeration rate is 10%; the flow rate of the ultrafiltration membrane in the tubular membrane equipment for solid-liquid separation of sewage is 7 m / s, and the operating pressure is 0.1MPa.

[0049] The purified water detection data of Examples 2 and 3 are also better than the discharge standard (GB16889-2008).

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Abstract

The invention relates to a garbage percolate treatment technology belonging to the technical field of the treatment of high-concentration organic wastewater. The treatment technology comprises six steps of pretreating, anaerobically treating, treating by a tubular membrane bioreactor, performing nano-filtration / reverse osmosis deep treatment, treating concentrated liquor, treating sludge and thelike. The technology can be used for degrading COD (chemical oxygen demand), total nitrogen and total phosphorus in the high-concentration wastewater, removing heavy metal ions from the high-concentration wastewater, and the like. After the technology is used, the defect in the prior art is overcome, wherein the defect mainly refers to the problems of unstable system or high maintenance cost and the like, and a core unit of the technology is a gas-reinforced ceramic membrane bioreactor. High-concentration garbage percolate treated by the technology is better than the emission requirement of the household garbage landfill and pollution control standard (GB16889-2008), and the quality of purified water meets the recycle requirement, so that the near-zero emission of the garbage percolate can be realized.

Description

technical field [0001] The invention relates to a landfill leachate treatment process, which belongs to the technical field of high-concentration organic wastewater treatment. Background technique [0002] In the past 10 years, my country's industrialization and urbanization process has accelerated. The total amount of urban waste is increasing at a rate of more than 10% per year. In 2010, my country's urban domestic waste reached more than 200 million tons. Landfill leachate is a high-concentration, multi-component, and variable sewage produced in the process of waste treatment. One ton of leachate is equivalent to the concentration of pollutants contained in 100 tons of urban sewage. [0003] The leachate of urban waste landfill has complex components and is recognized as one of the most difficult to treat high-concentration organic wastewater in the world, mainly manifested as BOD 5 , CODcr concentration is high, ammonia nitrogen content is high, the range of water qual...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F11/12C02F11/00C02F3/28
CPCY02E50/30
Inventor 张宏仲兆祥彭文博刘飞邢卫红
Owner JIANGSU JIUWU HITECH
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