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Rubbish leachate biological nitrogen removal process and device

A technology for landfill leachate and biological denitrification, which is applied in the field of high-concentration organic sewage treatment processes and devices, can solve the problems of many experimental studies and few practical applications, and achieves simplified treatment process, avoidance of secondary pollution, and removal of strong ammonia nitrogen. effect of function

Inactive Publication Date: 2010-08-25
BEIJING JIELV ENVIRONMENTAL TECH CO LTD
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  • Description
  • Claims
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Problems solved by technology

In recent years, the application of biological denitrification method in urban domestic sewage treatment has become a research hotspot, but there are many experimental studies and few practical applications

Method used

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  • Rubbish leachate biological nitrogen removal process and device
  • Rubbish leachate biological nitrogen removal process and device
  • Rubbish leachate biological nitrogen removal process and device

Examples

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Embodiment Construction

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] Such as figure 1As shown, in the GB16889-1997 "Standards for Pollution Control of Domestic Waste Landfill", the biological denitrification process of landfill leachate generally adopts the first-level denitrification to meet the standard requirements. The basic process is: anaerobic biochemical → anoxic reaction Nitrification→aerobic nitrification→MBR treatment→subsequent (nanofiltration membrane) treatment, namely:

[0045] 1) Use a pump to send the landfill leachate into the anaerobic tank for anaerobic biochemical treatment;

[0046] 2) Deodorize the biogas generated during the anaerobic biochemical treatment, recycle it or ignite it, and discharge the sludge generated during the anaerobic biochemical treatment;

[0047] 3) Perform anoxic denitrification treatment → aerobic nitrification treatment → MBR membrane treatment on the effluent a...

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Abstract

The invention relates to a rubbish leachate biological nitrogen removal process and a rubbish leachate biological nitrogen removal device. The process comprises the steps of water feeding, anaerobic biochemical treatment, primary anoxic denitrification, primary aerobic nitrification, secondary anoxic denitrification, secondary aerobic nitrification, MBR treatment and subsequent treatment. The device comprises an anaerobic tank, a primary anoxic denitrification tank, a primary aerobic nitrification tank, a secondary anoxic denitrification tank, a secondary aerobic nitrification tank and an MBR treatment device which are connected in turn through a water through pipeline, wherein a reflux pipe is led out from the primary aerobic nitrification tank to the primary anoxic denitrification tank; two reflux pipes led out from the MBR treatment device are connected to the primary and secondary anoxic denitrification tanks respectively; the anaerobic tank, the primary and secondary aerobic nitrification tanks and the MBR treatment device are connected with a sludge pipe respectively; the anaerobic tank is connected with a waste gas treatment device; the secondary anoxic denitrification tank is connected with a carbon supply device; and an aerating device is arranged in the primary and secondary aerobic nitrification tanks and the MBR treatment device respectively. The process can meet the requirement of GB16889-2008 'Domestic Rubbish Percolate (Leachate) Emission Limit' on nitrogen.

Description

technical field [0001] The invention relates to a process and a device for treating high-concentration organic sewage, in particular to a process and a device for biological denitrification of landfill leachate in urban waste landfills. Background technique [0002] The control of nitrogen and phosphorus in water bodies is because they can cause eutrophic pollution of water bodies, especially red algae tide pollution in many domestic and foreign sea areas; algae pollution in rivers and lakes, such as the famous Taihu Lake in China. The pollution of drinking water has caused a sensation all over the country, and these water pollution incidents have attracted the attention of all parties. [0003] Landfill leachate is high-concentration sewage with complex components, and its treatment is a difficult problem in domestic and foreign water treatment circles. Landfill leachate not only contains a large amount of biodegradable organic pollutants, but also contains a large amount ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/44C02F101/16C02F101/38
Inventor 赵凤秋
Owner BEIJING JIELV ENVIRONMENTAL TECH CO LTD
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