阅读说明：本技术 一种垃圾填埋场土壤污染修复方法 (Method for remedying soil pollution of refuse landfill ) 是由 杨一清 张楠 李耀晃 邓伟荣 渠金虎 于 2019-08-23 设计创作，主要内容包括：本发明公开了一种垃圾填埋场土壤污染修复方法,具体包括如下步骤：步骤一、在垃圾堆放的外部设置一顶棚,并在顶棚的四周设置有外围墙体,并在外围墙体底部的四周均匀打孔,使孔与孔之间的间距为1.5-2米,同时在顶棚顶部的外表面连通有多个导气管；步骤二、向顶棚的内部强制通风输氧,并使新鲜的垃圾层充满水分,实现垃圾的快速降解,导气管对产生的气体进行收集,降解结束后,逼出垃圾层中的水分,使水分通过孔进行收集；本发明涉及垃圾填埋场技术领域。该垃圾填埋场土壤污染修复方法,通过在两次对垃圾进行强制通风和输氧,大大提高了垃圾的快速降解,同时降低渗滤液和填埋气的排放强度,减少危害和二次污染。(the invention discloses a method for remedying soil pollution of a refuse landfill, which specifically comprises the following steps: step one, arranging a ceiling outside the garbage stack, arranging peripheral wall bodies around the ceiling, uniformly punching holes around the bottom of the peripheral wall bodies to enable the distance between the holes to be 1.5-2 m, and communicating a plurality of air guide pipes with the outer surface of the top of the ceiling; step two, forcibly ventilating and oxygen-transferring the interior of the ceiling, filling a fresh garbage layer with water, realizing rapid degradation of the garbage, collecting the generated gas by the gas guide pipe, and after degradation, expelling the water in the garbage layer to collect the water through the hole; the invention relates to the technical field of refuse landfills. According to the method for restoring the soil pollution of the refuse landfill, the refuse is subjected to forced ventilation and oxygen delivery twice, so that the rapid degradation of the refuse is greatly improved, the discharge intensity of leachate and landfill gas is reduced, and harm and secondary pollution are reduced.)

1. a method for remedying the soil pollution of a refuse landfill is characterized by comprising the following steps: the method specifically comprises the following steps:

step one, arranging a ceiling outside the garbage stack, arranging peripheral wall bodies around the ceiling, uniformly punching holes around the bottom of the peripheral wall bodies to enable the distance between the holes to be 1.5-2 m, and communicating a plurality of air guide pipes with the outer surface of the top of the ceiling;

Step two, forcibly ventilating and oxygen-transferring the interior of the ceiling, filling a fresh garbage layer with water, realizing rapid degradation of the garbage, collecting the generated gas by the gas guide pipe, and after degradation, expelling the water in the garbage layer to collect the water through the hole;

Step three, respectively purifying the collected harmful gas and sewage;

step four, pouring the garbage into a screening machine through the matching between the conveying system and the feeding system, separating the garbage through a screen by the screening machine, recycling fine particle dregs, recycling large particle garbage, conveying the garbage meeting the requirement of backfill soil to a garbage disposal site for landfill, and conveying the garbage to a terminal garbage disposal facility for incineration;

step five, after the garbage is conveyed to a garbage landfill, injecting air and liquid into the garbage landfill again, and reacting oxygen in the air and water in the liquid with degradable organic components and soluble inorganic components in the household garbage;

And sixthly, realizing landfill.

2. the method for remediating the soil pollution of the refuse landfill according to claim 1, wherein the method comprises the following steps: and step four, preferably screening and incinerating the garbage with higher heat value, so as to avoid potential safety hazards.

3. The method for remediating the soil pollution of the refuse landfill according to claim 1, wherein the method comprises the following steps: and D, recharging the mixed liquid in the step V into the landfill in the reaction process, changing the physical and chemical conditions in the landfill, and creating an environment conforming to the growth of aerobic microorganisms, so that the biodegradation and stabilization rate of the garbage are greatly increased, the discharge intensity of leachate and landfill gas is reduced, and harm and secondary pollution are reduced.

Technical Field

the invention relates to the technical field of refuse landfills, in particular to a method for remedying the soil pollution of a refuse landfill.

Background

The refuse landfill is a refuse centralized stacking site adopting a sanitary landfill mode, and the refuse sanitary landfill is widely applied in China due to low cost and good sanitary degree. The largest domestic refuse landfill is the Guangzhou Xingfeng refuse landfill, and the daily treatment of domestic refuse is about 7000 tons. Landfill is carried out in two ways, dumping-digging an open pit above the ground, burying the landfill in the pit, clustering various animals around the pit-building elaborate facilities underground or on the ground to isolate the landfill from the surrounding environment. This isolation is achieved by the bottom lining and daily soil coverage. Sanitary landfill-municipal solid waste landfill separated from the environment by a clay liner-landfill separated from the environment by a synthetic (plastic) liner, the purpose of which is to bury the landfill, isolated from ground water, kept dry and not in contact with air. Under such conditions, the waste is not largely decomposed. Landfills differ from compost heaps in that the purpose of the latter is to allow the buried waste to be rapidly broken down and folded.

The existing landfill pollution remediation has low treatment efficiency, a lot of harmful gases and waste water can grow during garbage treatment and are discharged to the nature, certain pollution is caused to the environment, the landfill soil pollution treatment is not thorough, and the treated soil still contains a lot of harmful substances.

disclosure of Invention

Aiming at the defects of the prior art, the invention provides a method for remedying the soil pollution of the refuse landfill, which solves the problems that the treatment efficiency of the existing refuse landfill pollution remediation is low, a lot of harmful gases and waste water can grow during refuse treatment and are discharged into the nature, certain pollution is caused to the environment, the soil pollution treatment of the refuse landfill is not thorough, and the treated soil still has a lot of harmful substances.

In order to achieve the purpose, the invention is realized by the following technical scheme: a method for remedying the soil pollution of a refuse landfill specifically comprises the following steps:

step one, arranging a ceiling outside the garbage stack, arranging peripheral wall bodies around the ceiling, uniformly punching holes around the bottom of the peripheral wall bodies to enable the distance between the holes to be 1.5-2 m, and communicating a plurality of air guide pipes with the outer surface of the top of the ceiling;

Step two, forcibly ventilating and oxygen-transferring the interior of the ceiling, filling a fresh garbage layer with water, realizing rapid degradation of the garbage, collecting the generated gas by the gas guide pipe, and after degradation, expelling the water in the garbage layer to collect the water through the hole;

Step three, respectively purifying the collected harmful gas and sewage;

step four, pouring the garbage into a screening machine through the matching between the conveying system and the feeding system, separating the garbage through a screen by the screening machine, recycling fine particle dregs, recycling large particle garbage, conveying the garbage meeting the requirement of backfill soil to a garbage disposal site for landfill, and conveying the garbage to a terminal garbage disposal facility for incineration;

Step five, after the garbage is conveyed to a garbage landfill, injecting air and liquid into the garbage landfill again, and reacting oxygen in the air and water in the liquid with degradable organic components and soluble inorganic components in the household garbage;

and sixthly, realizing landfill.

Preferably, the fourth step is to preferably screen and burn the garbage with higher heat value, so as to avoid potential safety hazard.

Preferably, the mixed liquid in the fourth step and the fifth step is re-filled into a landfill site in the reaction process, the physical and chemical conditions in the landfill site are changed, and an environment conforming to the growth of aerobic microorganisms is created, so that the biodegradation and stabilization rate of the garbage is greatly increased, the discharge intensity of leachate and landfill gas is reduced, and harm and secondary pollution are reduced.

The invention provides a method for remedying the soil pollution of a refuse landfill. The method has the following beneficial effects: the method specifically comprises the following steps: step one, arranging a ceiling outside the garbage stack, arranging peripheral wall bodies around the ceiling, uniformly punching holes around the bottom of the peripheral wall bodies to enable the distance between the holes to be 1.5-2 m, and communicating a plurality of air guide pipes with the outer surface of the top of the ceiling; and step two, forcibly ventilating and oxygen-transferring the interior of the ceiling, filling a fresh garbage layer with water, realizing the rapid degradation of the garbage, collecting the generated gas by the air duct, after the degradation is finished, expelling the water in the garbage layer, and collecting the water through the holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

the embodiment of the present invention provides a technical solution: a method for remedying the soil pollution of a refuse landfill specifically comprises the following steps:

step one, arranging a ceiling outside the garbage stack, arranging peripheral wall bodies around the ceiling, uniformly punching holes around the bottom of the peripheral wall bodies to enable the distance between the holes to be 1.5-2 m, and communicating a plurality of air guide pipes with the outer surface of the top of the ceiling;

Step two, forcibly ventilating and oxygen-transferring the interior of the ceiling, filling a fresh garbage layer with water, realizing rapid degradation of the garbage, collecting the generated gas by the gas guide pipe, and after degradation, expelling the water in the garbage layer to collect the water through the hole;

Step three, respectively purifying the collected harmful gas and sewage;

step four, pouring the garbage into a screening machine through the matching between the conveying system and the feeding system, separating the garbage through a screen by the screening machine, recycling fine particle dregs, recycling large particle garbage, conveying the garbage meeting the requirement of backfill soil to a garbage disposal site for landfill, and conveying the garbage to a terminal garbage disposal facility for incineration;

Step five, after the garbage is conveyed to a garbage landfill, injecting air and liquid into the garbage landfill again, and reacting oxygen in the air and water in the liquid with degradable organic components and soluble inorganic components in the household garbage;

And sixthly, realizing landfill.

In the fourth step of the invention, the screening and burning treatment is preferably carried out on the garbage with higher heat value, so as to avoid causing potential safety hazard, and the mixed liquid in the fifth step is recharged into the garbage landfill in the reaction process, so that the physical and chemical conditions in the landfill are changed, and the environment conforming to the growth of aerobic microorganisms is created, thereby greatly accelerating the biodegradation and stabilization rate of the garbage, simultaneously reducing the discharge intensity of leachate and landfill gas, and reducing harm and secondary pollution.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.