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A kind of landfill leachate treatment method

A landfill leachate and treatment method technology, which is applied in the field of landfill leachate treatment, can solve problems such as C/N ratio imbalance, phosphorus element deficiency, and impact on biological treatment effects, and achieve high economic benefits and reduce organic matter content.

Inactive Publication Date: 2016-04-13
XIAN HAOHAIJIA ENVIRONMENTAL PROTECTION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (5) With the increase of the age of the landfill site, the content of ammonia nitrogen increases, the ratio of C / N is out of balance, and the lack of phosphorus element brings certain difficulties to biological treatment
The disadvantage is that it is difficult to solve the problem of high ammonia nitrogen, which affects the effect of biological treatment. Under the new emission standards, it is difficult to operate stably, and the treatment facilities occupy a large area

Method used

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  • A kind of landfill leachate treatment method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1, one of landfill leachate treatment method, carry out according to following steps:

[0030] Step 1: Inject the collected landfill leachate into the wastewater regulating tank and stay in the regulating tank for 8 hours;

[0031] Step 2: After the landfill leachate is homogenized in the regulating tank, it enters the coagulation sedimentation tank 1, and 25 mg of polyaluminium chloride and 1 mg of polyacrylamide are put into every liter of sewage;

[0032] The third step: the supernatant of the sedimentation tank enters the upflow anaerobic sludge bed reactor 2;

[0033] Step 4: The supernatant of the anaerobic sludge bed reactor 2 passes through the mechanical filter 3 to reduce the turbidity to less than 20 mg per liter, and adjust the pH to 10.5 after filtering;

[0034] Step 5: The above-mentioned sewage is filtered through a 10-micron A precision filter 4 to remove 10-micron suspended solids, and then enters the ammonia nitrogen absorption membrane sy...

Embodiment 2

[0043] Embodiment 2, the second of landfill leachate treatment method, carry out according to following steps:

[0044] Step 1: Inject the collected landfill leachate into the wastewater regulating tank and stay in the regulating tank for 12 hours;

[0045] Step 2: After the landfill leachate is homogenized in the regulating tank, it enters the coagulation sedimentation tank 1, and 15 mg of polyaluminium chloride and 3 mg of polyacrylamide are put into every liter of sewage;

[0046] The third step: the supernatant of the sedimentation tank enters the upflow anaerobic sludge bed reactor 2;

[0047] Step 4: The supernatant of the anaerobic sludge bed reactor 2 passes through the mechanical filter 3 to reduce the turbidity to less than 20 mg per liter, and adjust the pH to 10 after filtering;

[0048] Step 5: The above-mentioned sewage is filtered through a 10-micron A precision filter 4 to remove 10-micron suspended solids, and then enters the ammonia nitrogen absorption membr...

Embodiment 3

[0057] Embodiment 3, the third of landfill leachate treatment method, carry out according to following steps:

[0058] The first step: inject the collected landfill leachate into the wastewater regulating tank, and stay in the regulating tank for 15 hours;

[0059] Second step: after the landfill leachate is homogenized by the above-mentioned regulating tank, it enters the coagulation sedimentation tank 1, and 20 mg of polyaluminum chloride and 2 mg of polyacrylamide are dropped into every liter of sewage;

[0060] The third step: the above-mentioned sedimentation tank supernatant enters the upflow anaerobic sludge bed reactor 2 for reaction;

[0061] The fourth step: the supernatant produced by the upflow anaerobic sludge bed reactor is passed through the mechanical filter 3, and the turbidity is reduced to less than 20 mg / liter, and the pH is adjusted to 10.2 after filtering;

[0062] Step 5: The sewage is filtered through the 10 micron A precision filter 4, and the suspend...

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Abstract

The invention relates to a treatment method of garbage leachate. The garbage leachate is hydrolyzed and acidified through a regulating pond and then added with a flocculating agent and a coagulant agent and enters a flocculating settling pond for settling, and a supernatant enters an anaerobic sludge bed reactor for anaerobic decomposition, then is filtered and passes through an ammonia nitrogen absorbing membrane, then enters a membrane bioreactor after ammonia nitrogen is removed and is finally discharged on standard through a nanofiltration system. According to the treatment method disclosed by the invention, the ammonia nitrogen content is reduced and the biodegradability of sewage is enhanced by carrying out pretreatment by applying an ammonia nitrogen absorbing membrane technology, and the organic content of the sewage is effectively reduced and the quality of treated water reaches the standard by combining an MBR (Membrane Biological Reactor) with a nanofiltration technology; and the treatment method has the advantages of high adaptability, good quality of the treated water, lower treatment cost, utilizable generated methane and ammonium salt and good economic benefit and environmental benefit.

Description

technical field [0001] The invention relates to sewage treatment technology, in particular to a treatment method for landfill leachate. Background technique [0002] In recent years, with the increase of the number of cities in our country and the increase of urban population, urban waste has increased dramatically. According to statistics, the garbage produced in my country reaches 240 million tons every year, and it is increasing at a rate of more than 9% every year, of which 7 billion tons of garbage have not been processed. It is estimated that in the next 20 years, the discharge of solid waste will occupy 85% of the land, and there are serious garbage pollution problems in most parts of the country. [0003] There are three main ways to deal with waste: composting, landfilling and incineration, among which landfilling is the main treatment way in my country at present. [0004] Landfill leachate refers to the formation of a variety of metabolites and water in the proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 李军李建新许增团刘少锋范小青侯燕卿李涛刘战虎许亚红刘建辉
Owner XIAN HAOHAIJIA ENVIRONMENTAL PROTECTION ENG CO LTD
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