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Refuse leachate treatment technology

A technology of landfill leachate and a treatment method, which is applied in the field of sewage treatment, can solve the problems of short service life, high operation cost and high power consumption, and achieves the effect of good effect, complete removal of ammonia nitrogen and reduction of treatment cost.

Inactive Publication Date: 2009-12-30
昆明市环境科学研究所
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  • Description
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Problems solved by technology

However, since the main principle of the electrolysis process is to use electrocatalytic oxidation to degrade organic matter, the greater the current density, the greater the amount of pollutants removed, but the higher the power consumption
Since the operating cost and construction investment of electrolytic removal of the same amount of pollutants are higher than those of biochemical processes, placing the electrolytic process at the initial stage of the treatment process will inevitably lead to higher operating costs
In this patented technology, the aerobic section reuses the principle of membrane filtration for final treatment. Since the membrane technology is a relatively new technology in China, and because the pore size of the membrane can intercept small molecular substances larger than 0.1 microns, not only the cost of the membrane itself is high, but also Short service life, construction investment and operating costs will still be factors restricting technology promotion

Method used

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  • Refuse leachate treatment technology

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Embodiment Construction

[0018] Example

[0019] Landfill leachate is first introduced into the water collection adjustment tank before blowing off, and alkali is added to the tank for stirring, and then sent to the closed tower. Adjust the pH value of the leachate according to Table 1, and then use the blower to send air to take out the ammonia nitrogen in the landfill leachate. The denitrification time is determined according to the ratio of COD:TN:TP=100:5:1, and the air-water ratio is 3000.

[0020] Blow off test removal effect table:

[0021] Table 1 24hr stripping effect under different pH conditions (mg / l)

[0022] pH

raw water

9

10

11

12

TN

1842

823.3

279.6

137.6

271.7

Removal rate (%)

0

55.3

84.8

92.5

85.2

[0023] It can be seen that the pH value is between 10 and 12, and the effect is better.

[0024] After denitrification, use a metering pump to pump water to the upflow ...

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Abstract

This invention relates to a process technology for rubbish seep filtrates including 1, blowing and stripping off, 2, internal circulation anaerobic sludge fluidized bed process, 3, active biofilm process, 4, electric catalysation and oxidation.

Description

technical field [0001] The invention belongs to the technology of sewage treatment, in particular to the technology of treating leachate of urban garbage. Background technique [0002] Landfill leachate is sewage seeping from landfills. Because it dissolves many substances in the garbage composition, the composition of landfill leachate is extremely complex. The main pollutants include a large number of organic substances such as organic hydrocarbons and their derivatives, Acids, lipids, heavy metals, nitrogen salts, etc. Among them, the organic pollutant index COD is several thousand to tens of thousands of milligrams per liter, and the total nitrogen is several hundred to several thousand milligrams per liter. If it is not harmless, it will seriously pollute the surroundings soil and water systems. [0003] So far, domestic relatively mature and under-research methods for treating landfill leachate mainly include biological treatment and chemical methods. Oxidation pond,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/20C02F1/66C02F3/30C02F1/46
Inventor 郑一新丁宏伟张琨玲李跃勋郝玉昆
Owner 昆明市环境科学研究所