CN202638846U

CN202638846U - Waste landfill bioreactor structure

Info

Publication number: CN202638846U
Application number: CN201220237619.0U
Authority: CN
Inventors: 刘勇; 刘泽军; 洪慧兰; 金晶; 余昆朋; 罗彬�; 朱湖地; 苗竹; 闫慧; 彭冲
Original assignee: Beijing Geoenviron Engineering and Technology Inc
Current assignee: Beijing Geoenviron Engineering and Technology Inc
Priority date: 2012-05-24
Filing date: 2012-05-24
Publication date: 2013-01-02
Anticipated expiration: 2022-05-24

Abstract

A landfill bioreactor structure, including a landfill, also includes a leachate adjustment tank, a leachate treatment system and a leachate concentrate backfill system, a leachate collection system and a leachate collection system are arranged in the landfill Concentrate backfill system, the leachate outlet of the leachate collection system is connected to the leachate adjustment tank, the outlet of the leachate adjustment tank is connected to the leachate treatment system, and the concentrate of the leachate treatment system The outlet communicates to the leachate concentrate backfill system. The utility model has strong biodegradation function, fast biodegradation speed of garbage, short stabilization time, high output of landfill gas, complete collection and cost saving, and the utility model can effectively reduce leachate treatment amount.

Description

A kind of garbage loading embeading bioreactor construction

Technical field

The utility model relates to the Assessment of MSW Disposal Technologies field, relates in particular to a kind of garbage loading embeading bioreactor construction.

Background technology

Along with the raising of Chinese society expanding economy and people's living standard, more and more higher to the requirement of urban environment, need to seek new technology of garbage disposal.Landfill is at present domestic and international main waste disposal method, the garbage loading embeading processing accounts for 70% of whole garbage treatment quantities in China, and (rubbish from cooking content is high for the national conditions of China and the characteristic of domestic waste, moisture content is higher, calorific value is low and component of refuse is complicated) also determined within the from now on quite a long time, the landfill disposal technology will be the main processing mode of China's domestic waste, but existing traditional garbage loading embeading treatment technology is only the system of landfill yard as a passive receive rubbish, the biodegradation of rubbish be one without the natural degradation process of any control, because " doing the coffin pit " landfill of the problem in the design of traditional life landfill structure---rubbish, bury rubbish humidity low, can't provide a suitable condition for growth of microorganism, the biodegradation of rubbish thereby be restricted, the natural degradation speed of landfill waste is very slow, even (30～50 years) still need landfill yard is carried out maintenance and management in significant period of time after closing, as percolate is processed, landfill gas is carried out guide and burning etc.

The utility model content

The purpose of this utility model is to design a kind of novel garbage loading embeading bioreactor construction, addresses the above problem.

To achieve these goals, the technical solution adopted in the utility model is as follows:

A kind of garbage loading embeading bioreactor construction, comprise landfill yard, also comprise leachate equalization basin, percolation liquid treating system and percolate concentrate backfill system, in described landfill yard, be provided with leachate collection system and percolate concentrate backfill system, the percolate outlet of described leachate collection system is communicated to described leachate equalization basin, the outlet of described leachate equalization basin is communicated to described percolation liquid treating system, and the concentrated solution outlet of described percolation liquid treating system is communicated to described percolate concentrate backfill system.

Described percolate concentrate backfill system comprises backflow pool and pump house; Described backflow pool is arranged on the highest place of described landfill yard physical features, and the concentrated solution outlet of described percolation liquid treating system is communicated in the described backflow pool by the elevator pump in the described pump house;

Not perforate HDPE pipe is set in described landfill yard periphery, and described not perforate HDPE pipe is provided with three-limb tube; Lower leaf on the buring layer in the described landfill yard, be provided with french drain in every one deck, lay the metalling of thick 30cm in the described french drain, among described metalling, be provided with perforate HDPE pipe, described perforate HDPE pipe is communicated to described not perforate HDPE pipe by described three-limb tube, establishes a plurality of ostium excurrenses on the every described perforate HDPE pipe.

Described perforate HDPE pipe is provided with refluxing opening, and described refluxing opening is provided with the seal closure of the control backflow water yield.

Described perforate HDPE pipe all keeps being not less than 2% the gradient from described refluxing opening to each described ostium excurrens.

The diameter of described not perforate HDPE pipe and perforate HDPE pipe is 160mm, a french drain just is set every about 20m in every one deck, lay the metalling of thick 30cm in the described french drain, the perforate HDPE pipe that among described metalling a diameter to be set be 160mm, described perforate HDPE pipe is communicated to described not perforate HDPE pipe by described three-limb tube, establishes a plurality of ostium excurrenses on the every described perforate HDPE pipe.

HDPE pipe in the utility model refers to high density polyethylene pipe, and HDPE is the abbreviation of " High Density Polyethylene ".

Percolate in the utility model claim is diafiltration (concentrating) liquid.

The technological process that application the utility model carries out garbage loading embeading is the microbial process of strengthening landfill yard by autotelic control device, thereby easily degrade in the acceleration rubbish and medium easy degraded organic component conversion and stable a kind of garbage sanitary filling field method of operation, except the rubbish storing function with general sanitary landfills method, also have stronger biological degradation function, refuses biodegradation speed is fast, stabilizing take is short, landfill gas output is high, it is complete to collect.

Use the utility model and carry out the technological process of garbage loading embeading in the stabilization procedures of landfill yard rubbish, because the complexity of refuse composition and structure, series of physical, chemistry and biology reaction will---occur at rubbish after advancing people's landfill yard in rubbish in microorganism---percolate---the landfill gas microecosystem, such as processes such as adsorption precipitation, complexing, biodegradations, make pollutant obtain degraded, purify.

The so-called nutriment of the utility model, (C: N: P), so-called nutriment is unbalance, refers to carbon, nitrogen and phosphorus (C: N: the proportional imbalance P) to refer to carbon, nitrogen and phosphorus.

Using the utility model, to carry out preliminary treatment in the technological process of garbage loading embeading mainly be to utilize physical treatment to remove ammonia nitrogen and inorganic impurity or improve the biodegradability of percolate, if pretreating process is not up to standard, then follow-up treatment facility loss is larger.

Use biological treatment that the utility model carries out the technological process of garbage loading embeading and mainly be and utilize the methods such as anaerobic process, aerobic method to remove organic pollution in the percolates and ammonia nitrogen etc., processing effective, expense is low, and technology and application section are simpler.

Use film advanced treating that the utility model carries out the technological process of garbage loading embeading and mainly be and utilize nanofiltration and counter-infiltration to remove dissolved matter in the percolate, suspension etc., the method somewhat expensive, complex management.

The beneficial effects of the utility model are as follows:

1, the waste landfill method in the utility model has stronger biological degradation function, and refuses biodegradation speed is fast, stabilizing take is short, landfill gas output is high, collect fully the saving cost.

2, the utility model can effectively reduce the percolate treating capacity.

Description of drawings

Shown in Figure 1 is the place layout schematic diagram of the utility model percolate concentrate backfill system:

Shown in Figure 2 is the profile on the A-A direction among Fig. 1.

Shown in Figure 3 is to use the process chart that the utility model carries out garbage loading embeading.

The specific embodiment

Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.

Such as Fig. 1 to a kind of garbage loading embeading bioreactor construction shown in Figure 2, comprise leachate equalization basin, percolation liquid treating system and percolate concentrate backfill system, in described landfill yard, be provided with leachate collection system and percolate concentrate backfill system, the percolate outlet of described leachate collection system is communicated to described leachate equalization basin, the outlet of described leachate equalization basin is communicated to described percolation liquid treating system, and the concentrated solution outlet of described percolation liquid treating system is communicated to described percolate concentrate backfill system; Described percolate concentrate backfill system comprises backflow pool and pump house; Described backflow pool is arranged on the highest place of described landfill yard physical features, and the concentrated solution outlet of described percolation liquid treating system is communicated in the described backflow pool by the elevator pump in the described pump house; Not perforate HDPE pipe is set in described landfill yard periphery, and described not perforate HDPE pipe is provided with three-limb tube; Lower leaf on the buring layer in the described landfill yard, be provided with french drain in every one deck, lay the metalling of thick 30cm in the described french drain, among described metalling, be provided with perforate HDPE pipe, described perforate HDPE pipe is communicated to described not perforate HDPE pipe by described three-limb tube, establishes a plurality of ostium excurrenses on the every described perforate HDPE pipe; Described perforate HDPE pipe is provided with refluxing opening, and described refluxing opening is provided with the seal closure of the control backflow water yield, and described perforate HDPE pipe all keeps being not less than 2% the gradient from described refluxing opening to each described ostium excurrens.

In the embodiment that is more preferably, the diameter of described not perforate HDPE pipe and perforate HDPE pipe is 160mm, a french drain just is set every about 20m in every one deck, lay the metalling of thick 30cm in the described french drain, the perforate HDPE pipe that among described metalling a diameter to be set be 160mm, described perforate HDPE pipe is communicated to described not perforate HDPE pipe by described three-limb tube, establishes a plurality of ostium excurrenses on the every described perforate HDPE pipe.

Use the technological process that the utility model carries out garbage loading embeading such as Fig. 3, its step comprises that garbage loading embeading, diafiltration (concentrating) liquid recharge, microbial degradation generates landfill gas, leachate collection and processing; After the described garbage loading embeading step of beginning, the described percolate that leaches in the described rubbish of landfill is after collecting and processing, diafiltration (concentrating) liquid that produces is used for described landfill waste is recharged, described microbial degradation process begins and produces landfill gas, and the percolate of generation is treated to be effluxed after up to standard.The treatment step of described percolate comprises preliminary treatment, biological treatment and film advanced treating.

In described garbage loading embeading step, first described rubbish is carried out landfill and carry out even compacting; The amount of landfill of every day guarantees the continuous infiltration of percolate from the rubbish top to the bottom, after finishing, each landfill covers described landfill waste with geotextile, open described geotextile during next landfill and carry out landfill, after landfill is finished described geotextile is covered back again.Generate in the landfill gas process in described microbial degradation, the temperature of the inside of landfill waste described in the landfill yard is controlled at 45 ℃-60 ℃.

Recharging in the step of described diafiltration (concentrating) liquid, if percolate reflects that the interior nutriment of landfill yard is unbalance, in the diafiltration of recharging (concentrating) liquid, add the nutriment that lacks the nutriment in the landfill yard is restored balance.

And recharging in the step of described diafiltration (concentrating) liquid, its design following (referring to Fig. 1, Fig. 2): backflow pool 1 is arranged on the highest place of landfill yard 2 physical features, and pump house 3 nearby is set, diafiltration (concentrating) liquid is promoted in the backflow pool 1 via elevator pump; It is the not perforate HDPE pipe 4 of 160mm that one loop diameter is set in landfill yard 2 peripheries, and be provided with three-limb tube 5 in the fixed position, in landfill yard, a french drain 6 just is set every about 20m, lay the rubble of thick 30cm, the perforate HDPE pipe 7 that a diameter is set among rubble is 160mm, and whenever landfill depth reaches 10m, just re-lay the described french drain 6 of one deck; The perforate HDPE pipe 7 of each root all is provided with refluxing opening and many ostium excurrenses, each described refluxing opening is provided with the seal closure of the control backflow water yield, and described perforate HDPE pipe 7 all keeps being not less than 2% the gradient from described refluxing opening to each described ostium excurrens; Described diafiltration (concentrating) liquid in the described backflow pool 1 flows into described perforate HDPE pipe 7 through described refluxing opening, recharges described landfill yard 2 through described ostium excurrens again.The present embodiment also comprises the landfill gas treatment step, and in described landfill gas treatment step, described landfill gas is used for generating or carries out entering atmosphere after the harmless treatment.

Need to consider following key element in concrete each step:

1) day cladding material is selected

After satisfying the functions such as dustproof, diseases prevention, deodorization, fire prevention, anti-animal, bioreactor landfill covers the continuous infiltration that not affect percolate every day, occupies simultaneously minimum landfill yard space.Suggestion replaces traditional soil with the HDPE geomembrane and covers, and opens cladding material during the rubbish of one deck under the landfill and use next time again.

2) refuse breaking and compacting control

Landfill can increase rubbish, percolate, microorganism and is in contact with one another area behind the refuse breaking, thereby accelerates garbage decomposition.Garbage truck will be taken into account the multilayer landfill and satisfy the percolate transmission requirement, avoids inhomogeneous compacting to form the percolate privileged way.

3) percolate reflux operation

Adjust flexibly reflux operation according to aerogenesis and the daily monitoring result of percolate.Preferably should after descending, aerogenesis trend reflux again.

4) pH regulates

It is one of the most effective management means of bioreactor landfill that pH regulates.First neutralization before the percolate that produces acid phase refluxes is avoided an interior Accumulation of Organic Acids and is suppressed growth methanotrophic bacterial strain and multiply.The pH buffer capacity that also can in cover layer or rubbish body, add the alkaline matter enhancing landfill yards such as lime slaking mud.

5) add nutrition

The adding nutriment has positive role to the degradation rate of organic waste in the backflow percolate.If percolate reflects that (C: N: P) unbalance, the material of can considering to supplement the nutrients is to satisfy the needs of microorganism in the landfill yard for the interior nutrition of landfill yard.

6) temperature control

Requiring the landfill yard optimum temperature according to microorganism is 45 ℃～60 ℃, the landfill yard temperature is controlled at this scope the fast decoupled of rubbish is benefited.

More than by the detailed description of concrete and preferred embodiment the utility model; but those skilled in the art should be understood that; the utility model is not limited to the above embodiment; all within spirit of the present utility model and principle; any modification of doing, be equal to replacement etc., all should be included within the protection domain of the present utility model.

Claims

1. A landfill bioreactor structure, comprising a landfill, is characterized in that: it also includes a leachate regulating tank, a leachate treatment system and a leachate concentrate backfill system, and a leachate is provided in the landfill Filtrate collection system and leachate concentrate backfill system, the leachate outlet of the leachate collection system is connected to the leachate adjustment tank, the outlet of the leachate adjustment tank is connected to the leachate treatment system, the leachate The concentrate outlet of the filtrate treatment system is connected to the leachate concentrate backfill system.

2. The landfill bioreactor structure according to claim 1, characterized in that: the leachate concentrate backfill system includes a backflow pool and a pump room; the backflow pool is arranged at the highest point of the landfill site place, the concentrate outlet of the leachate treatment system is connected to the return pool through the lift pump in the pump room;

A non-perforated HDPE pipe is arranged on the periphery of the landfill, and a three-way connecting pipe is arranged on the non-perforated HDPE pipe; the landfill layer in the landfill is layered up and down, and blind holes are arranged in each layer. A 30cm-thick gravel layer is laid in the blind ditch, and a perforated HDPE pipe is arranged in the gravel layer, and the perforated HDPE pipe is connected to the non-perforated pipe through the three-way connecting pipe. HDPE pipes, each of the perforated HDPE pipes is provided with a plurality of water outlet holes.

3. The landfill bioreactor structure according to claim 2, characterized in that: the perforated HDPE pipe is provided with a backflow port, and the backflow port is provided with a sealing cover to control the amount of backflow water.

4. The landfill bioreactor structure according to claim 3, characterized in that: said perforated HDPE pipe maintains a slope of no less than 2% from said return outlet to each of said water outlet holes.

5. The landfill bioreactor structure according to claim 2, characterized in that: the diameters of the non-perforated HDPE pipes and the perforated HDPE pipes are both 160mm, and one is set every 20m or so in each layer. Blind ditch, laying a gravel layer with a thickness of 30cm in the blind ditch, and setting an open-hole HDPE pipe with a diameter of 160mm in the gravel layer, and the open-hole HDPE pipe is connected through the three-way connecting pipe As for the non-perforated HDPE pipes, each of the perforated HDPE pipes is provided with a plurality of water outlet holes. the