Garbage leachate treatment process

A technology of landfill leachate and treatment process, which is applied in the field of advanced treatment process of landfill leachate, which can solve the problems of inability to biochemically treat and achieve the effects of low operating costs, low investment, and high treatment efficiency

Active Publication Date: 2011-01-19
UNIVERSTAR SCI & TECH SHENZHEN
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Problems solved by technology

However, since the COD contained in the ultrafiltrate cannot be treated biochemically, effective biochemical modification must be carried out before secondary biochemical treatment is possible.

Method used

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0020] A treatment process for landfill leachate, the following process steps are taken:

[0021] (1) The landfill leachate is filtered through a fine grid, the solids in it are transported out for backfilling, and the liquid part enters the coagulation sedimentation tank;

[0022] (2), add polyaluminum chloride and calcium hydroxide in the coagulation sedimentation tank, and separate precipitation under the effect of mixer, the supernatant of gained enters the regulating tank;

[0023] (3), the supernatant of step (2) gained adjusts pH to neutrality through regulating tank;

[0024] (4), the neutral supernatant obtained in step (3) is pumped into the upward flow anaerobic sludge bed by the anaerobic circulation pump for treatment, wherein the biogas recovery is used to increase the temperature of the waste water, and af...

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Abstract

The invention discloses garbage leachate treatment process, which comprises the following process steps of: (1) filtering garbage leachate with a fine grid and allowing obtained liquid part to enter a coagulating sedimentation tank; (2) adding a coagulant into the coagulating sedimentation tank, separating precipitate with stirring, and allowing obtained supernate to enter an adjusting tank; (3) adjusting the supernate obtained by step (2) in the adjusting tank until the pH value is neutral; (4) pumping the obtained neutral supernate obtained by step (3) into an upflow anaerobic sludge blanket for treatment by using an anaerobic recycle pump, and allowing effluent obtained after the anaerobic treatment to enter a denitrification tank and a nitrification tank for denitrification and nitrification treatment and then enter an ultrafiltration device for ultrafiltration; (5) bio-chemically modifying the ultrafiltrated effluent by ozone; and (6) performing secondary biochemical treatment on the modified water and then directly draining the processed water after the secondary biochemical treatment. The garbage leachate treatment process has the advantages of high efficiency, low energy consumption and easy operation and management.

Description

technical field [0001] The invention relates to a sewage treatment process, in particular to an advanced treatment process for landfill leachate. Background technique [0002] In the current urban waste treatment, sanitary landfill and waste incineration are widely used in waste treatment due to their advantages of low cost and convenient management. The leachate produced by waste is a kind of high pollution concentration and multi-component organic wastewater. With the rapid growth of the amount of waste, and people's increasing attention to environmental issues, coupled with the government's stricter regulatory standards for leachate treatment, there will be a large number of leachate treatment projects to start construction in the next few years . [0003] MBR is the more mature landfill leachate treatment technology currently in use, as can be seen from the "2009 National Advanced Pollution Prevention and Control Demonstration Technology Directory". However, the COD of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/52
Inventor 石教猛杜娟曹玉梅
Owner UNIVERSTAR SCI & TECH SHENZHEN
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