CN108218073A - A kind of device and method of integration advanced treatment of landfill leachate - Google Patents

Abstract

An integrated advanced treatment device and method for landfill leachate, belonging to the field of sewage treatment. The integrated device for advanced treatment of landfill leachate consists of an oxidation device, a coagulation sedimentation tank and a filter tank. The oxidation device includes a water inlet pipe, a dosing port, a tubular reactor, a low-pressure mercury lamp, and a tubular reactor. The reactor is one group or multiple groups in parallel, which are arranged outside the coagulation-settling tank or integrated with the coagulation-settling tank; Pipe, mud outlet; the inside of the filter is a replaceable extractable filter material or filter layer. The beneficial effects of the present invention are: the present invention uses the biochemical effluent of landfill leachate as raw water, and performs advanced treatment on the biochemical effluent of landfill leachate in the manner of "advanced oxidation process + coagulation sedimentation + filtration", so that the quality of the effluent water can reach << Discharge standards of the Pollution Control Standards for Domestic Waste Landfill Sites (GB 16889‑2008).

Description

An integrated advanced treatment device and method for landfill leachate

technical field

The invention belongs to the field of sewage treatment, and in particular relates to an integrated advanced treatment device and method for landfill leachate.

Background technique

The water quality and quantity of landfill leachate vary greatly, the composition is more complex, and the treatment is difficult and harmful. It will have a great impact on the natural environment and human health. The treatment of landfill leachate is generally pretreated, followed by biochemical treatment, and finally advanced treatment and discharge.

At present, the advanced treatment technology often used is membrane treatment technology and mainly reverse osmosis technology. Its treatment effect is better and the equipment is relatively mature. However, the concentrated solution produced after the reaction will cause secondary pollution, and the operating cost is high, so it is not suitable for application in In the current depth processing method.

Contents of the invention

The present invention aims at the problem that the existing landfill leachate treatment method has high cost and is easy to cause secondary pollution, and proposes an integrated device and method for advanced treatment of landfill leachate. The device and method have low investment cost, good treatment effect, Simple process.

In order to achieve the above object, the technical scheme that the present invention takes is as follows:

An integrated device for advanced treatment of landfill leachate, including an oxidation device, a coagulation sedimentation tank and a filter tank, the oxidation device includes a water inlet pipe, a dosing port, a tubular reactor and a low-pressure mercury lamp, and the The coagulation-sedimentation tank includes a coagulation-settling tank body, a coagulation agent dosing port, a stirring device, a mud discharge port, and an inclined plate or inclined pipe; the filter includes a filter body and a filter material or a filter layer;

The water inlet pipe is communicated with one end of the tubular reactor, the other end of the tubular reactor is connected with the feeding port at one end of the coagulation sedimentation tank body, and the dosing port is set in the tubular reactor The upper part, the low-pressure mercury lamp is arranged inside the tubular reactor, the lower part of the feed port of the coagulation-settling tank body is provided with a coagulation agent dosing port, and the lower part of the coagulation-settling tank body is inverted conical, The bottom of the coagulation sedimentation tank body is provided with a mud outlet, and the other end of the coagulation sedimentation tank body is provided with a discharge port. The discharge port is connected with the filter body. Stirring device, the side of the coagulation sedimentation tank close to the discharge port is provided with a slant plate or inclined tube, and the filter material or filter layer is provided in the filter body.

A method for advanced treatment of landfill leachate using the above-mentioned integrated device for advanced treatment of landfill leachate, the steps of the method are as follows:

Step 1: The biochemically treated landfill leachate enters the oxidation device, firstly add persulfate, ferrous salt and complexing agent through the dosing port, and react for 30 minutes. Among them, persulfate, ferrous salt and complexing agent The mass ratio of the three is 25:2.5:1, and the COD mass ratio of the total mass of the three to landfill leachate is 20~30:1;

Step 2: The landfill leachate treated by the pipeline reactor in the oxidation device enters the coagulation sedimentation tank, and the flocculant is added through the coagulation agent injection port, mixed evenly in the coagulation sedimentation tank and left to settle;

Step 3: After being treated in the coagulation sedimentation tank, it enters the filter tank, and the pollutants are removed through the adsorption and interception of the filter material or filter layer, and finally the effluent water quality meets the standard discharge.

An integrated device for advanced treatment of landfill leachate, including an oxidation device, a coagulation sedimentation tank and a filter tank, the oxidation device includes a water inlet pipe, a dosing port, a tubular reactor and a low-pressure mercury lamp, and the The coagulation-sedimentation tank includes a coagulation-settling tank body, a coagulation agent dosing port, a stirring device, a mud discharge port, and an inclined plate or inclined pipe; the filter includes a filter body and a filter material or a filter layer;

The tubular reactor is arranged at one end of the coagulation-sedimentation tank body, the low-pressure mercury lamp is arranged inside the tubular reactor, and the water inlet pipe, the dosing port and the coagulation agent dosing port are all connected with each other. One end of the coagulation-sedimentation tank body is connected, and the water inlet pipe, the dosing port and the coagulation agent dosing port are arranged sequentially from top to bottom, and one end of the coagulation-sedimentation tank body is provided with a stirring device. The stirring paddle of the stirring device is arranged in the coagulation sedimentation tank body, the stirring device is arranged in the lower part of the coagulation agent dosing port, the lower part of the coagulation sedimentation tank body is inverted conical, and the bottom of the coagulation sedimentation tank body is provided with a mud discharge mouth, the other end of the coagulation sedimentation tank body is provided with a discharge port, the discharge port is connected with the filter body, and the side of the coagulation sedimentation tank body close to the discharge port is provided with a sloping plate or inclined tube, the filter A filter material or a filter layer is arranged in the pool body.

A method for advanced treatment of landfill leachate using the above-mentioned integrated device for advanced treatment of landfill leachate, the steps of the method are as follows:

Step 1: The biochemically treated landfill leachate enters the oxidation device, firstly add persulfate, ferrous salt and complexing agent through the dosing port, and react for 30 minutes. Among them, persulfate, ferrous salt and complexing agent The mass ratio of the three is 25:2.5:1, and the COD mass ratio of the total mass of the three to landfill leachate is 20~30:1;

Step 2: The landfill leachate treated by the pipeline reactor in the oxidation device enters the coagulation sedimentation tank, and the flocculant is added through the coagulation agent injection port, mixed evenly in the coagulation sedimentation tank and left to settle;

Step 3: After being treated in the coagulation sedimentation tank, it enters the filter tank, and the pollutants are removed through the adsorption and interception of the filter material or filter layer, and finally the effluent water quality meets the standard discharge.

Compared with the prior art, the present invention has the advantages of simple process, stable treatment effect, no secondary pollution and low treatment cost. The biochemical effluent of landfill leachate is used as raw water, and the biochemical effluent of landfill leachate is subjected to advanced treatment in the way of "advanced oxidation process + coagulation sedimentation + filtration". Advanced persulfate oxidation technology is a new and efficient treatment technology. This process has good treatment effect and low cost, and can make the effluent water quality meet the discharge standard of "Pollution Control Standards for Domestic Garbage Landfill Sites" (GB 16889-2008). The embedded ultraviolet lamp tube reactor in the present invention can meet the requirements of oxidation reaction and rapid mixing at the same time.

Description of drawings

FIG. 1 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 2 is the sectional view of tubular reactor in Fig. 1;

Fig. 3 is a schematic structural view of Embodiment 4 of the present invention;

Fig. 4 is the sectional view of tubular reactor among Fig. 3;

In the figure: 1-water inlet pipe, 2-dosing port, 3-tubular reactor, 4-low pressure mercury lamp, 5-coagulant agent feeding port, 6-stirring device, 7-sloping plate or inclined tube, 8-filter material, 9-sludge outlet, 10-filter layer.

Detailed ways

The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments, but it is not limited thereto. Any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit of the technical solution of the present invention should be included in the scope of the present invention. Within the protection scope of the present invention.

The principle of the present invention is: the advanced oxidation of persulfate activated by ultraviolet light is strengthened by ferrous salt to realize the direct removal of some pollutants in the biochemical effluent of landfill leachate, and it can destroy the molecular structure of refractory pollutants and improve the efficiency of waste water. Biodegradability; then add flocculant to the effluent, enter the coagulation sedimentation tank for mixing and settling to remove the organic matter in the wastewater; finally use the filter to further remove pollutants to ensure the discharge of the final effluent.

Specific embodiment 1: This embodiment records an integrated device for advanced treatment of landfill leachate, including an oxidation device, a coagulation sedimentation tank and a filter tank, as shown in Figures 1 and 2, the oxidation device includes Water inlet pipe 1, dosing port 2, tubular reactor 3 and low-pressure mercury lamp 4, the coagulation sedimentation tank includes a coagulation sedimentation tank body, a coagulation agent dosing port 5, a stirring device 6, and a sludge discharge port 9 and an inclined plate or inclined pipe 7; the filter includes a filter body and a filter material 8 or a filter layer 10;

The water inlet pipe 1 is communicated with one end of the tubular reactor 3, the other end of the tubular reactor 3 is connected with the feed port at one end of the coagulation sedimentation tank body, and the dosing port 2 is arranged at The upper part of the tubular reactor 3, the low-pressure mercury lamp 4 is arranged inside the tubular reactor 3, and the lower part of the feed port of the coagulation-sedimentation tank body is provided with a coagulation agent dosing port 5, and the coagulation and sedimentation The lower part of the tank body is in an inverted conical shape, the bottom of the coagulation sedimentation tank body is provided with a mud discharge port 9, and the other end of the coagulation sedimentation tank body is provided with a discharge port, and the discharge port is connected with the filter tank body. A stirring device 6 is arranged on the side close to the feed inlet in the body, a slant plate or a slanted tube 7 is arranged on the side near the discharge outlet in the coagulation sedimentation tank body, and a filter material 8 or a filter layer 10 is arranged in the filter body.

The above is the scheme when the tubular reactor 3 is arranged outside the coagulation-sedimentation tank body. The tubular reactor 3 is one group or multiple groups arranged in parallel, and is arranged outside the coagulation-settling tank body.

Specific embodiment two: a kind of integrated deep treatment landfill leachate device described in specific embodiment one, described tubular reactor 3 material is quartz glass, described low-pressure mercury lamp 4 wavelength is 254nm, when sewage Oxidation reaction can be carried out when flowing through, and the boundary layer effect of the side wall of the pipeline can be used to realize rapid mixing and increase the reaction rate.

Specific embodiment three: a kind of integrated deep treatment landfill leachate device described in specific embodiment two, described filter material 8 is anthracite filter material or quartz sand filter material, described filter layer 10 is activated carbon fiber felt .

Specific Embodiment 4: This embodiment records an integrated device for advanced treatment of landfill leachate, including an oxidation device, a coagulation sedimentation tank and a filter tank, as shown in Figures 3 and 4, the oxidation device includes Water inlet pipe 1, dosing port 2, tubular reactor 3 and low-pressure mercury lamp 4, the coagulation sedimentation tank includes a coagulation sedimentation tank body, a coagulation agent dosing port 5, a stirring device 6, and a sludge discharge port 9 and an inclined plate or inclined pipe 7; the filter includes a filter body and a filter material 8 or a filter layer 10;

The tubular reactor 3 is arranged at one end of the coagulation sedimentation tank body, the low-pressure mercury lamp 4 is arranged inside the tubular reactor 3, the water inlet pipe 1, the dosing port 2 and the coagulation agent The dosing ports 5 are all connected to one end of the coagulation-sedimentation tank body, and the water inlet pipe 1, the dosing port 2 and the coagulation agent dosing port 5 are arranged sequentially from top to bottom, and the coagulation-sedimentation tank body A stirring device 6 is provided at one end of the stirring device 6, the stirring paddle of the stirring device 6 is arranged in the coagulation sedimentation tank body, the stirring device 6 is arranged at the lower part of the coagulation agent dosing port 5, and the lower part of the coagulation sedimentation tank body is an inverted Conical, the bottom of the coagulation sedimentation tank body is provided with a mud discharge port 9, and the other end of the coagulation sedimentation tank body is provided with a discharge port, the discharge port is connected with the filter body, and the coagulation sedimentation tank body is close to the discharge port One side is provided with a slant plate or a slanted pipe 7, and the filter material 8 or filter layer 10 is provided in the filter body.

The above is the scheme when the tubular reactor 3 and the coagulation-sedimentation tank body are integrated. The tubular reactor 3 is one group or multiple groups arranged in parallel, and is integrated with the coagulation-settling tank body.

Embodiment 5: A device for integrated advanced treatment of landfill leachate described in Embodiment 4, the material of the tubular reactor 3 is quartz glass, and the wavelength of the low-pressure mercury lamp 4 is 254nm. Oxidation reaction can be carried out when flowing through, and the boundary layer effect of the side wall of the pipeline can be used to realize rapid mixing and increase the reaction rate.

Specific embodiment six: a kind of integrated deep treatment landfill leachate device described in specific embodiment five, described filter material 8 is anthracite filter material or quartz sand filter material, described filter layer 10 is activated carbon fiber felt .

Embodiment 7: A method for advanced treatment of landfill leachate using the device for advanced treatment of landfill leachate described in any one of Embodiments 1 to 3. The steps of the method are as follows:

Step 1: The biochemically treated landfill leachate enters the oxidation device, firstly add persulfate, ferrous salt and complexing agent through the dosing port 2, and react for 30 minutes. The complex can strengthen the ultraviolet light activation of persulfate, Sulfate radicals are produced, and their oxidation removes some pollutants and improves the biodegradability of wastewater; among them, the mass ratio of persulfate, ferrous salt and complexing agent is 25:2.5:1, and the total mass of the three is the same as The COD mass ratio of landfill leachate is 20~30:1;

Step 2: The landfill leachate treated by the pipeline reactor 3 in the oxidation device enters the coagulation sedimentation tank, and the flocculant is added through the coagulation agent dosing port 5, mixed evenly in the coagulation sedimentation tank and left to settle;

Step 3: After being treated in the coagulation sedimentation tank, it enters the filter tank, and the pollutants are removed through the adsorption and interception of the filter material 8 or the filter layer 10, and finally the effluent water quality reaches the standard and is discharged.

Embodiment 8: A method for integrated advanced treatment of landfill leachate described in Embodiment 7, in step 1, the pH in the tubular reactor is controlled between 2 and 7; Sulphate is one or more in potassium persulfate, sodium persulfate, potassium persulfate; described ferrous salt is ferrous chloride, which can strengthen ultraviolet light to activate persulfate, and described complexing agent is Citric acid, EDTA or tartaric acid, the complexing agent and ferrous salt form a complex, the reacted ferrous salt can reduce the amount of flocculant for subsequent coagulation reaction, and the mass ratio of complexing agent to ferrous salt is 1 : 3~5; the flocculant is polyaluminum chloride, polyferric chloride or ferric chloride, and the COD mass ratio of the flocculant to the landfill leachate to be treated is 1:1~2.

Embodiment 9: A method for advanced treatment of landfill leachate using the device for advanced treatment of landfill leachate described in any of Embodiments 4 to 6. The steps of the method are as follows:

Step 1: The biochemically treated landfill leachate enters the oxidation device, firstly add persulfate, ferrous salt and complexing agent through the dosing port 2, and react for 30 minutes. The complex can strengthen the ultraviolet light activation of persulfate, Sulfate radicals are produced, and their oxidation removes some pollutants and improves the biodegradability of wastewater; among them, the mass ratio of persulfate, ferrous salt and complexing agent is 25:2.5:1, and the total mass of the three is the same as The COD mass ratio of landfill leachate is 20~30:1;

Step 2: The landfill leachate treated by the pipeline reactor 3 in the oxidation device enters the coagulation sedimentation tank, and the flocculant is added through the coagulation agent dosing port 5, mixed evenly in the coagulation sedimentation tank and left to settle;

Step 3: After being treated in the coagulation sedimentation tank, it enters the filter tank, and the pollutants are removed through the adsorption and interception of the filter material 8 or the filter layer 10, and finally the effluent water quality reaches the standard and is discharged.

Embodiment 10: In Embodiment 9, a method for integrated advanced treatment of landfill leachate, in step 1, the pH in the tubular reactor is controlled between 2 and 7; Sulphate is one or more in potassium persulfate, sodium persulfate, potassium persulfate; described ferrous salt is ferrous chloride, which can strengthen ultraviolet light to activate persulfate, and described complexing agent is Citric acid, EDTA or tartaric acid, the complexing agent and ferrous salt form a complex, the reacted ferrous salt can reduce the amount of flocculant for subsequent coagulation reaction, and the mass ratio of complexing agent to ferrous salt is 1 : 3~5; the flocculant is polyaluminum chloride, polyferric chloride or ferric chloride, and the COD mass ratio of the flocculant to the landfill leachate to be treated is 1:1~2.

Example 1:

After the biochemical reaction, the COD value of the landfill leachate effluent is about 800mg/L, and the advanced oxidation treatment of ferrous salt-enhanced ultraviolet light-activated persulfate, coagulation and sedimentation treatment, and filtration treatment are carried out in sequence. The specific steps are as follows:

(1) Advanced oxidation treatment of ferrous acid-enhanced UV-activated persulfate

Adjust the pH value of the effluent after biochemical treatment to about 4, add oxidant potassium persulfate 5~10g/L, ferrous chloride 5mmol/L, citric acid 1mmol/L, and pass through the tubular reactor for 5~10min to make it After being evenly mixed with wastewater, in the main reaction zone of advanced oxidation, under the irradiation of a low-pressure mercury lamp with a wavelength of 254nm, persulfate generates sulfate radicals, destroys the molecular structure of refractory organic matter, and improves the biodegradability of wastewater.

(2) Coagulation and sedimentation treatment

The wastewater after advanced oxidation treatment is added to the coagulation sedimentation tank, and the COD mass ratio of polyferric chloride to the landfill leachate to be treated is 1:1, and the coagulation aid PAM is added to the coagulation tank, per ton Add 0.01kg of water and pass it through the stirring device for 5-8 minutes to make it evenly mixed, then let it stand for sedimentation, and set the inclined plate device for sedimentation, and the coagulation and sedimentation time is 2 hours.

(3) Filtration treatment

The effluent after coagulation and sedimentation is added to the filter tank. The filter tank is a filter tank that can replace the filter material or filter layer. The upper layer of the device is anthracite filter material, the middle layer is quartz sand filter material, and the bottom layer is activated carbon fiber felt. The adsorption and interception of the filter material removes pollutants, and each part is supported by plexiglass.

Claims (10)

1. a kind of device of integration advanced treatment of landfill leachate, including oxidation unit, coagulative precipitation tank and filter tank, feature It is：The oxidation unit includes inlet channel（1）, dosing mouth（2）, tubular reactor（3）And low pressure mercury lamp（4）, it is described Coagulative precipitation tank include coagulating sedimentation pond body, coagulated agent and add mouth（5）, agitating device（6）, mud discharging mouth（9）And inclined plate or Inclined tube（7）；The filter tank includes filter tank body and filtrate（8）Or filtering layer（10）；

The inlet channel（1）With tubular reactor（3）One end connection, the tubular reactor（3）The other end with The feed inlet connection of coagulating sedimentation pond body one end, the dosing mouth（2）It is set to tubular reactor（3）Top, it is described Low pressure mercury lamp（4）It is arranged on tubular reactor（3）Inside, the feed inlet lower part of the coagulating sedimentation pond body are equipped with coagulated agent Add mouth（5）, coagulating sedimentation pond body lower part is inverted conical, and coagulating sedimentation pond body bottom is provided with mud discharging mouth（9）, coagulating sedimentation The pond body other end is equipped with discharge port, and the discharge port is connected with filter tank body, is set in coagulative precipitation tank body close to feed inlet side It is equipped with agitating device（6）, discharge port side is provided with inclined plate or inclined tube in coagulative precipitation tank body（7）, the filter tank body Inside it is provided with filtrate（8）Or filtering layer（10）.

2. a kind of device of integrated advanced treatment of landfill leachate according to claim 1, it is characterised in that：Described Tubular reactor（3）Material is quartz glass, the low pressure mercury lamp（4）Wavelength is 254nm.

3. a kind of device of integrated advanced treatment of landfill leachate according to claim 2, it is characterised in that：Described Filtrate（8）For ANTHRACITE FILTER MEDIA or quartz sand filter media, the filtering layer（10）For active carbon fiber felt.

4. a kind of device of integration advanced treatment of landfill leachate, including oxidation unit, coagulative precipitation tank and filter tank, feature It is：The oxidation unit includes inlet channel（1）, dosing mouth（2）, tubular reactor（3）And low pressure mercury lamp（4）, it is described Coagulative precipitation tank include coagulating sedimentation pond body, coagulated agent and add mouth（5）, agitating device（6）, mud discharging mouth（9）And inclined plate or Inclined tube（7）；The filter tank includes filter tank body and filtrate（8）Or filtering layer（10）；

The tubular reactor（3）It is set to one end in coagulative precipitation tank body, the low pressure mercury lamp（4）It is arranged on tubular type Reactor（3）Inside, the inlet channel（1）, dosing mouth（2）And coagulated agent adds mouth（5）With coagulating sedimentation pond body One end connection, and inlet channel（1）, dosing mouth（2）And coagulated agent adds mouth（5）It from top to bottom sets gradually, institute The one end of coagulating sedimentation pond body stated is provided with agitating device（6）, the agitating device（6）Agitating paddle be arranged on coagulation and sink In the pond body of shallow lake, agitating device（6）It is arranged on coagulated agent and adds mouth（5）Lower part, the coagulating sedimentation pond body lower part are rounding Taper, coagulating sedimentation pond body bottom are provided with mud discharging mouth（9）, the coagulating sedimentation pond body other end is provided with discharge port, and described goes out Material mouth is connected with filter tank body, and discharge port side is provided with inclined plate or inclined tube in coagulative precipitation tank body（7）, the filter tank body Inside it is provided with filtrate（8）Or filtering layer（10）.

5. a kind of device of integrated advanced treatment of landfill leachate according to claim 4, it is characterised in that：Described Tubular reactor（3）Material is quartz glass, the low pressure mercury lamp（4）Wavelength is 254nm.

6. a kind of device of integrated advanced treatment of landfill leachate according to claim 5, it is characterised in that：Described Filtrate（8）For ANTHRACITE FILTER MEDIA or quartz sand filter media, the filtering layer（10）For active carbon fiber felt.

7. a kind of device of integrated advanced treatment of landfill leachate described in using claim 1 ~ 3 any claim carries out The method of landfill leachate advanced treating, it is characterised in that：The method step is as follows：

Step 1：Enter oxidation unit by the landfill leachate of biochemical treatment, first pass through dosing mouth（2）Add persulfate, Ferrous salt and complexing agent react 30 min, wherein, the mass ratio of persulfate, ferrous salt and complexing agent is 25：2.5：1, three The COD mass ratioes of gross mass and landfill leachate are 20 ~ 30：1；

Step 2：Pipeline reactor in oxidized device（3）Treated, and landfill leachate enters in coagulative precipitation tank body, leads to Cross coagulation adding of agent mouth（5）Flocculant is added in, be uniformly mixed in coagulative precipitation tank and is staticly settled；

Step 3：Enter filter tank after the processing of coagulative precipitation tank, pass through filtrate（8）Or filtering layer（10）Absorption crown_interception, Remove pollutant, the discharge of final outflow water water quality reaching standard.

8. a kind of method of integrated advanced treatment of landfill leachate according to claim 7, it is characterised in that：Step 1 In, the pH in the tubular reactor is controlled between 2 ~ 7；The persulfate is potassium peroxydisulfate, sodium peroxydisulfate, over cure One or more of sour potassium；The ferrous salt be frerrous chloride, the complexing agent be citric acid, EDTA or tartaric acid, The mass ratio of the complexing agent and ferrous salt formation complex compound, complexing agent and ferrous salt is 1：3~5；The flocculant is poly- The COD mass ratioes of conjunction aluminium chloride, poly-ferric chloride or iron chloride, flocculant and pending landfill leachate are 1：1~2.

9. a kind of device of integrated advanced treatment of landfill leachate described in using claim 4 ~ 6 any claim carries out The method of landfill leachate advanced treating, it is characterised in that：The method step is as follows：

Step 1：Enter oxidation unit by the landfill leachate of biochemical treatment, first pass through dosing mouth（2）Add persulfate, Ferrous salt and complexing agent react 30 min, wherein, the mass ratio of persulfate, ferrous salt and complexing agent is 25：2.5：1, three The COD mass ratioes of gross mass and landfill leachate are 20 ~ 30：1；

Step 2：Pipeline reactor in oxidized device（3）Treated, and landfill leachate enters in coagulative precipitation tank body, leads to Cross coagulation adding of agent mouth（5）Flocculant is added in, be uniformly mixed in coagulative precipitation tank and is staticly settled；

Step 3：Enter filter tank after the processing of coagulative precipitation tank, pass through filtrate（8）Or filtering layer（10）Absorption crown_interception, Remove pollutant, the discharge of final outflow water water quality reaching standard.

10. a kind of method of integrated advanced treatment of landfill leachate according to claim 9, it is characterised in that：Step In one, the pH in the tubular reactor is controlled between 2 ~ 7；The persulfate is potassium peroxydisulfate, sodium peroxydisulfate, mistake One or more of potassium sulfate；The ferrous salt is frerrous chloride, and the complexing agent is citric acid, EDTA or winestone The mass ratio of acid, the complexing agent and ferrous salt formation complex compound, complexing agent and ferrous salt is 1：3~5；The flocculant For aluminium polychloride, poly-ferric chloride or iron chloride, the COD mass ratioes of flocculant and pending landfill leachate are 1：1~2.