CN103553271B - A multi-stage treatment and purification process for groundwater pollution - Google Patents

Abstract

The invention provides a kind of groundwater pollution multiple-stage treatment purification process, comprise: the ABFT from left to right connected successively, filtering basin and reaction tank, extraction tube is communicated to the bottom of extraction well, extraction tube is connected in extraction pump on earth's surface, extraction pump is connected to ABFT by pipeline, reaction tank is connected with transferpump by transfer lime, and the water shoot be connected with the transferpump the other end extends to infiltration trench inside.The invention has the beneficial effects as follows: the composition characteristic that have been directed to the underground water of waste lump infiltration, pass through multistage treatment method, effectively can remove the ammonia nitrogen in underground water and contaminated with halogenated hydrocarbons thing, enable underground water meet water quality standard for drinking water, reasonable in design, structure is simple, safe and reliable, easy to use, be easy to safeguard, there is the value promoted the use of.

Description

A multi-stage treatment and purification process for groundwater pollution

technical field

The invention relates to a polluted groundwater restoration technology, in particular to a groundwater pollution multi-stage treatment and purification process.

Background technique

With the rapid development of the city, the amount of garbage collected is increasing, and there are more and more garbage dumps. This will inevitably cause garbage seepage to pollute the groundwater. These problems continue to aggravate, making it difficult to less groundwater can be directly used by humans. The content of ammonia nitrogen and halogenated hydrocarbons in the garbage permeate is relatively high, which has become the main factor of polluting groundwater. The existing treatment system mainly consists of water isolation technology, chemical treatment and vacuum extraction, etc., with high operating costs and complex structure. , but still can not reach very ideal treatment effect, the groundwater needs to be further purified to meet the standard of drinking water.

Contents of the invention

The object of the present invention is to overcome the deficiencies in the prior art and provide a multi-stage treatment and purification process for groundwater pollution.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

A multi-stage treatment and purification process for groundwater pollution, including an aerated biological fluidization tank, a filter tank and a reaction tank connected in sequence from left to right. The extraction pipe is connected to the bottom of the extraction well, and the extraction pipe is connected to the extraction well on the surface. On the lifting pump, the extraction pump is connected to the aerated biological fluidization tank through a pipeline, the reaction tank is connected to the delivery pump through a delivery pipe, and the drain pipe connected to the other end of the delivery pump extends to the inside of the permeation channel, and the reaction tank is filled with oil. The filling material is a mixture of fermented bark and sand, and the volume ratio of fermented bark and sand is greater than or equal to 1:1.

Further, a microporous aeration system is provided at the bottom of the aerated biological fluidization tank, and the interior is filled with oil and porous polymer fillers as the carrier of microorganisms. The material used for the carrier is polyurethane sponge, and water purification plants are planted on the upper part of the filter tank. What the plant adopts is the salicaceae plant with well-developed root system.

The present invention has the following beneficial effects:

The groundwater pollution multi-stage treatment and purification process of the present invention is aimed at the composition characteristics of the groundwater infiltrated by garbage pollutants. Through the multi-stage treatment method, the ammonia nitrogen and halogenated hydrocarbon pollutants in the groundwater can be effectively removed, so that the groundwater can meet the requirements of drinking water. Standard water quality, reasonable design, simple structure, safe and reliable, easy to use, easy to maintain, and has the value of popularization. Description of drawings

Figure 1 is a structural diagram of the multi-stage treatment and purification process provided by the present invention.

Symbol Description:

1: Biological aerated fluidization tank 2: Filter tank 3: Reaction tank 4: Permeation channel

5: Water purification plant 6: Filling material 7: Carrier 8: Extraction pump 9: Extraction tube

10: Pipeline 11: Extraction well 12: Delivery pipe 13: Delivery pump 14: Drainage pipe

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As an embodiment of the present invention, referring to Fig. 1, a multi-stage treatment and purification process for groundwater pollution includes a biological aerated fluidization tank 1, a filter tank 2 and a reaction tank 3 connected in sequence from left to right, and an extraction pipe 9 is connected to the bottom of the extraction well 11, the extraction pipe 9 is connected to the extraction pump 8 on the surface, the extraction pump 8 is connected to the aerated biological fluidization tank 1 through the pipeline 10, and the reaction tank 3 is connected to the aerated biological fluidization tank 1 through the delivery pipe 12 The delivery pump 13 is connected, and the drain pipe 14 connected to the other end of the delivery pump 13 extends to the inside of the permeation channel 4, and the reaction tank 3 is filled with oil filling material 6, which is a mixture of fermented bark and sand, fermented bark and The volume ratio of sand is greater than or equal to 1:1.

Further, the bottom of the aerated biological fluidization tank 1 is provided with a microporous aeration system, and the interior is filled with oily and porous polymer fillers as the carrier 7 of microorganisms. The material used for the carrier 7 is polyurethane sponge, and the upper part of the filter tank 2 is planted with clean water Plant 5, what water purification plant 5 adopted is the Salicaceae plant with well-developed root system.

During work, in the area where the groundwater is polluted by pollutants such as ammonia nitrogen or halogenated hydrocarbons, an extraction well 11 is drilled, and the extraction pump 8 on the surface pumps the polluted groundwater through the extraction pipe 9 connected to the bottom of the extraction well 11. Mention the ground surface, and send the groundwater to the aerated biological fluidization tank 1 through the pipeline 10. The carrier 7 in the aerated biological fluidization tank 1 is placed with composite microbial strains. The microorganisms obtain sufficient oxygen during the aeration process, and directly oxidize ammonia nitrogen pollutants into nitrate nitrogen. This process can remove most of the ammonia nitrogen. pollutants. At this time, the groundwater that still has a lot of oxygen dissolved enters the filter tank 2, and under aerobic conditions, the remaining ammonia nitrogen pollutants are further oxidized to nitrate nitrogen. Water purifying plants 5 are planted on the upper part of the filter tank 2, which are Salicaceae plants with well-developed roots, which can not only purify the groundwater, but also consume oxygen in the water, reduce dissolved oxygen in the groundwater, and ensure that the reaction tank 3 is an anaerobic environment. In the reaction tank 3 in the anaerobic environment, the denitrification is completed, and the nitrate nitrogen is reduced to nitrogen, which volatilizes by itself. At the same time, the anaerobic microorganisms in the reaction tank 3 can pollute the oxidation state of halogenated hydrocarbons. The organic matter in the fermented bark can be used as an electron donor to increase the rate of the reduction process. The treated groundwater is transported to the surface by the delivery pump 13 through the delivery pipe 12, and then discharged into the permeation channel 4 through the drain pipe 14, thus completing a whole bottom polluted water treatment process, which is simple and effective with high treatment efficiency.

In summary, the present invention has only described one embodiment of the multi-stage treatment and purification process for groundwater pollution, but the present invention is not limited thereto, and those skilled in the art should know that without departing from the scope of the claims described in the present invention Any changes and modifications are possible without the scope of protection.

Claims (1)

1. A groundwater pollution multi-stage treatment and purification method is characterized in that it comprises an aerated biological fluidization tank (1), a filter tank (2) and a reaction tank (3) successively connected from left to right, and an extraction pipe ( 9) Connected to the bottom of the extraction well (11), the extraction pipe (9) is connected to the extraction pump (8) on the surface, and the extraction pump (8) is connected to the aerated biological fluidization through the pipeline (10). Pool (1), reaction pool (3) are connected with delivery pump (13) through delivery pipe (12), and the drainage pipe (14) connected with the other end of delivery pump (13) extends to the inside of permeation channel (4), so The reaction tank (3) is filled with a filler (6), the filler (6) is a mixture of fermented bark and sand, the volume ratio of fermented bark and sand is greater than or equal to 1:1, and the aerated biological fluidization The bottom of the pool (1) is equipped with a microporous aeration system, and the interior is filled with a porous polymer filler as a carrier (7) for microorganisms. The material used for the carrier (7) is polyurethane sponge, and the upper part of the filter pool (2) is planted There are water-purifying plants (5), and the water-purifying plants (5) are Salicaceae plants with well-developed root systems. When working, an extraction well (11) is drilled in areas where groundwater is polluted by ammonia nitrogen or halogenated hydrocarbon pollutants. The surface extraction pump (8) pumps the polluted groundwater to the surface through the extraction pipe (9) connected to the bottom of the extraction well (11), and sends the groundwater to the aerated biological flow through the pipeline (10) In the chemical tank (1), the carrier (7) in the aerated biological fluidization tank (1) is placed with compound microbial strains, and the microorganisms obtain sufficient oxygen during the aeration process, and directly oxidize ammonia nitrogen pollutants into nitrate nitrogen , this process can remove most of the ammonia nitrogen pollutants. At this time, the groundwater with a lot of dissolved oxygen enters the filter tank (2). Under aerobic conditions, the remaining ammonia nitrogen pollutants are further oxidized to nitrate nitrogen, and filtered Water purification plants (5) are planted on the upper part of the pool (2), which are Salicaceae plants with well-developed root systems. They can not only purify the groundwater, but also consume oxygen in the water, reduce dissolved oxygen in the groundwater, and ensure that the reaction pool (3) is anaerobic. Oxygen environment, in the reaction tank (3) in the anaerobic environment, the denitrification of nitrate nitrogen is completed, the nitrate nitrogen is reduced to nitrogen, and volatilizes by itself, and the anaerobic microorganisms in the reaction tank (3) can convert the halogenated Hydrocarbon reduction degradation, the organic matter in the fermented bark can be used as an electron donor to increase the rate of the reduction process, so that the treated groundwater is transported to the surface by the transport pump (13) through the transport pipe (12), and then passed through the drain pipe (14 ) into the infiltration channel (4).