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Recirculation unit and method for waste leachate or concentrate thereof

A technology of landfill leachate and concentrate, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of difficult formation of aerobic conditions, poor vertical permeability, unfavorable removal of ammonia nitrogen, etc. problems, achieve good ventilation, solve poor permeability, and facilitate removal

Active Publication Date: 2011-05-18
BEIJING TDR ENVIRON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still deficiencies in horizontal recharge. Landfills usually have poor vertical permeability due to collection system compaction and plastic bag blocking, and horizontal recharge is not effective in the case of poor vertical permeability. Low hydraulic load for recharge, resulting in huge recharge area and high investment
At the same time, because the above-mentioned recharge method is anaerobic recharge, the ammonia nitrogen cannot contact the air, it is difficult to form an aerobic condition, which is not conducive to the removal of ammonia nitrogen, and it is easy to cause the accumulation of ammonia nitrogen

Method used

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  • Recirculation unit and method for waste leachate or concentrate thereof
  • Recirculation unit and method for waste leachate or concentrate thereof

Examples

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Effect test

Embodiment 1

[0027] A landfill in Yichang produces an average of 240 tons of landfill leachate per day. The leachate treatment plant was built and put into use in January 2009. It processes 240 tons of landfill leachate per day, discharges 188 tons of clear water per day after treatment, and produces 52 tons of concentrated liquid. The concentrated solution adopts the gabion recharging treatment of the present invention, and the concentrated solution is transported to each recharging unit for recharging with a recharging tank car. There are 10 recharging units in the landfill, and each recharging unit has a service area of ​​200m 2 .

[0028] Such as figure 1 As shown, the water distribution layer 2 of each recharge unit is composed of the second-level matching stone 7, which is a low-calcium pebble with a diameter of 32-64 mm, and the water distribution layer 2 is sandwiched in the garbage layer 1. The polypropylene hollow tube perpendicular to and connected to the water distribution lay...

Embodiment 2

[0030] A landfill in Tieling produces an average of 150 tons of landfill leachate per day. The leachate treatment plant was built in September 2009. It processes 150 tons of landfill leachate per day, discharges 112.5 tons of clear water per day after treatment, and produces 37.5 tons of concentrated liquid. For recharge treatment, use the recharge pump to lift the permeate to each recharge area for recharge. There are 8 recharge units in the landfill, and each recharge unit has a service area of ​​200m 2 , wherein the structure of each recharge unit is the same as that of Embodiment 1, and the steps are:

[0031] (1) When the garbage layer reaches a certain thickness, build a water distribution layer. Each water distribution layer is composed of second-level matching stones. The second-level matching stones are low-calcium pebbles with a diameter of 32-64mm. The water distribution layer is sandwiched within the garbage layer;

[0032] (2) Set up a recharge channel with sever...

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Abstract

The invention discloses a recirculation unit and method for waste leachate or concentrate thereof. The recirculation unit comprises a waste layer, a water distributing layer horizontally sandwiched in the waste layer, and a recirculation channel which is vertical to and communicated with the water distributing layer, wherein a plurality of through holes are formed on the recirculation channel; a gabion is arranged around the recirculation channel; and primary graded gravel is filled between the body of the gabion and the recirculation channel. The invention has small influence on landfill operation, is suitable for implementation of new and old landfill sites, can form vertical permeability and horizontal permeability, effectively solves the problem of poor permeability of landfill body, is beneficial to ammonia and nitrogen removal, and has the characteristics of high recirculation hydraulic load, low price, easy acquisition of raw materials and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a refilling unit of landfill leachate or its concentrated solution and a refilling method thereof. Background technique [0002] The recharge of landfill leachate or its concentrate is to refill the collected landfill leachate or its concentrate into the landfill, and use the biodegradation, physical and chemical adsorption, retention, and precipitation in the landfill to treat the leachate. It is an effective method for the treatment of landfill leachate or its concentrate and the disposal of the concentrate. Landfill leachate or its concentrate recharge method generally adopts spray recharge, surface pond recharge, horizontal recharge, etc. The spraying and surface pond recharging methods are easy to construct because they are constructed on the surface of the garbage, but due to environmental problems such as odors and flies, they are rarely used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F3/00
Inventor 王晶王如顺齐奇
Owner BEIJING TDR ENVIRON TECH CO LTD
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