CN205035215U - Landfill leachate treatment device - Google Patents

Landfill leachate treatment device Download PDF

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Publication number
CN205035215U
CN205035215U CN201520510560.1U CN201520510560U CN205035215U CN 205035215 U CN205035215 U CN 205035215U CN 201520510560 U CN201520510560 U CN 201520510560U CN 205035215 U CN205035215 U CN 205035215U
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pipe
pond
settling tank
processing unit
percolate
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叶颖
杨帆
李定策
王宝林
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Hunan Traffic Science Research Institute Co Ltd
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HUNAN COMMUNICATIONS RESEARCH INSTITUTE
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Abstract

The utility model relates to a landfill leachate treatment device, this kind of device including processing unit in advance, once nitrify - denitrification processing unit, chemical oxidation processing unit, secondary nitrify - denitrification processing unit, the processing unit and store the mud sump of disinfecting, processing unit connects in proper order, processing unit includes that sedimentation tank, pH regulating pondage, ammonia blow tuo ta and ammonia absorption tower in advance, nitrify - denitrification processing unit includes the oxygen deficiency pond oxygen pond of becoming reconciled. The utility model discloses a landfill leachate treatment device has adopted physical chemistry - biochemistry to unite processing system to the characteristic of cities and towns domestic waste landfill yard filtration liquid to be provided with many places and adjust the facility, guarantee the stable high -efficient operation of whole system, finally make landfill leachate reach " domestic waste landfill yard pollution control standard (GB16889 -2008) " emission standard.

Description

A kind of garbage leachate treatment device
Technical field
The utility model relates to a kind of device adopting the pollution substance such as physico-chemical process and biochemistry treatment method combined removal city life garbage burying field Organic Pollutants of Landfill Leachate, heavy metal, ammonia nitrogen in high density, belong to technical field of sewage, be applicable to the process of application of city life garbage percolate.
Background technology
Percolate refers to and derives from the moisture that in refuse landfill, rubbish itself contains, the sleet water entering landfill yard and other moisture, the saturation moisture capacity of deduction rubbish, overburden layer, and a kind of high-concentration waste water experiencing waste layer and overburden layer and formed.The ammonia nitrogen of high density is one of water quality characteristic of Leachate site, and Leachate site ammonia nitrogen concentration is generally from tens to thousands of milligrams per liter.According to the Leachate site Regular of Water Quality Variation that domestic refuse landfill produces, along with the prolongation of landfill time, the ammonia nitrogen concentration of Leachate site has the trend of rising, and biodegradability can decline.
" household refuse landfill sites Environmental capacity standard " (GB16889-2008) implemented on July 1st, 2008, and propose stricter standard to percolate discharge, wherein strict index is total nitrogen and COD.After new standard is implemented, the treatment process that can reach new standard requirement at present mainly contains four large classes: first class is biochemical treatment+film treatment combination technique; Second largest class is pure physical treatment technology; The third-largest class is physical treatment+chemical treatment combination process; The fourth-largest class is biochemical treatment+chemical oxidation combination process;
The main technique of first class has several as follows:
1. membrane bioreactor (MBR)+nanofiltration (NF)+reverse osmosis (RO) technique, adopts the utility model patent of this technique number to be: ZL200810056984.X;
2. membrane bioreactor (MBR)+nanofiltration (NF) technique, adopts the Authorization Notice No. of the patent of this technique to be: CN101244880B;
3. ammonia aeration+membrane bioreactor (MBR)+nanofiltration (NF) technique, adopts the patent of invention of this technique number to be: ZL200610034517.8;
The main technique of second largest class has several as follows:
1. disc tube reverse osmosis (dt-ro) film (DTRO) technique, adopts the patent of invention of this technique number to be: ZL200510102945.5;
The main technique of the third-largest class is as follows:
1. evaporation+ion exchange process, adopts the patent of invention of this technique number to be: ZL200710031584.9;
The fourth-largest class main technique is as follows:
1. biological nitration/denitrification+Fenton oxidation (Fenton)+BAF (BAF) technique, adopts the patent of invention of this technique number to be: ZL200510035132.9
First class treatment process is the technique be most widely used at present, and the nanofiltration used in such technique (NF) and reverse osmosis (RO) they are a kind of physical sepn technique, and reverse osmosis membrane aperture is little of nano level, under pressure, and H 2o molecule can pass through RO film, and the impurity such as inorganic salt, heavy metal ion, organism, colloid, bacterium, virus in percolate cannot pass through RO film, the material permeance that nanofiltration membrane allows relative molecular weight to be less than 200, ultra-filtration membrane allows the larger material of relative molecular weight to pass through.In first class treatment process, nanofiltration membrane and ultra-filtration membrane are to the NO in water 3 -, NO 2 -, NH 3, NH 4 +retain efficiency extremely low; Only have reverse osmosis membrane to retain and live in state four kinds of ions.Therefore, do not use in the existing membrane process craft of reverse osmosis, the important task of the removal of total nitrogen is all entrusted give in MBR nitrated/denitrification process, if in waste water, carbon source is not enough or biological nitre is nitrated/denitrification occurs abnormal, then there will be the situation that total nitrogen exceeds standard.Therefore, all add reverse osmosis membrane assembly in current membrane treatment process, up to standard to guarantee water outlet total nitrogen.Membranous system all produces concentrated solution, and nanofiltration system produces the concentrated solution of about 15%, and reverse osmosis system produces about 15% concentrated solution.
Second largest class treatment process is the side that the pollution substances such as the organism in waste water, ammonia nitrogen are trapped in film by application butterfly tubular type reverse osmosis membrane (DTRO) assembly, H 2o molecule arrives the opposite side of film through crossing reverse osmosis membrane, thus obtains clean water outlet.This technique is pure physical separating process, and the concentrated solution adopting this kind of technique to produce is greater than 25% for the treatment of capacity usually.
The third-largest class technique: evaporation+ion exchange process, percolate heating is evaporated by this technique, produce the distilled water of about 90% and the evaporation concentration liquid of 10%, the pollution substances such as the organism in percolate, heavy metal are concentrated in the concentrated solution of 10%.The distilled water collected is removed after ammonia nitrogen can reach emission standard through storng-acid cation exchange resin again.
The maximum feature of the fourth-largest class treatment process does not use the membrane modules such as ultra-filtration membrane (UF), nanofiltration membrane (NF), reverse osmosis membrane (RO), therefore, do not have concentrated solution to produce.Such technique adopts the total nitrogen in traditional biological nitration, denitrification removal percolate, adopts (Fenton) to be oxidized coordinate subsequent biochemical technique to be removed to the organic pollutant of difficult degradation in percolate.
Common four large class Technology Economic contrast are in table 1:
The large class treatment process technology and economy comparison of table 1 four
The difficult point of percolate process has two aspects: one is remove total nitrogen; Another reduces ton water treatment running cost.
As can be seen from the above table, although first, second, third large class treatment process treatment effect is stablized, effluent quality is excellent, but total investment of engineering and ton cost of water treatment high, high investment and working cost bring very heavy economical load to the operation of landfill yard.The fourth-largest class technique has that total investment of engineering is low, the advantage of ton water running low cost, but the operation for the treatment of facility affected by environment large, operational administrative is more complicated.When ambient temperature sharply changes, the fourth-largest class treatment process can fluctuate larger in total nitrogen removal efficiency.
Utility model content
The technical problems to be solved in the utility model overcomes the deficiencies in the prior art, provides that a kind of construction investment is low, running cost is low, treatment effect is good, applied range, easily is automated and controls and the garbage leachate treatment device of operation.
The utility model garbage leachate treatment device, comprise pretreatment unit, nitrification-denitrification processing unit, chemical oxidation treatment unit, a second nitrification-denitrification processing unit, disinfect unit and mud storage pool, processing unit is linked in sequence; Nitrification-denitrification processing unit comprises anoxic pond and Aerobic Pond.
Described pretreatment unit, comprises settling tank, PH adjustment pond, Ammonia blowing-out tower, ammonia absorber, a secondary PH adjusts pond.
The former water water inlet pipe of percolate connects settling tank, the former water water inlet pipe of percolate is provided with molysite and adds pipeline and alkali adds pipeline, and settling tank top has settling tank rising pipe to adjust pond with a PH to be connected, and settling tank bottom has sludge from sedimentation tank pipe to be connected to mud storage pool.
PH adjusts pond and arranges steam-heated pipe line and alkali adds pipeline, one time PH adjusts bottom, pond is connected to Ammonia blowing-out tower by percolate transfer lime top through topping-up pump, the top of Ammonia blowing-out tower has ammonia-containing exhaust transfer lime to be connected to the bottom of ammonia absorber, and the top of ammonia absorber has cleaning of off-gas delivery pipe to lead directly to air; The bottom of Ammonia blowing-out tower has percolate delivery pipe connecting secondary PH to adjust pond.
Secondary PH adjusts pond and is provided with steam-heated pipe line and H 2sO 4add pipeline, be connected with a nitrification-denitrification processing unit by percolate water inlet pipe.
Percolate is through settling tank flocculation sediment, supernatant liquor flows into a PH equalizing tank, Ammonia blowing-out tower stripping ammonia nitrogen is entered through pump and Cemented filling after regulating pH value and/or adjustment temperature, entering ammonia absorber bottom containing ammonia nitrogen tail gas through flowing out from Ammonia blowing-out tower top, absorbing after ammonia nitrogen from ammonia absorber top qualified discharge through ammonia absorber; Percolate enters secondary PH and adjusts pond after Ammonia blowing-out tower, regulates pH value and/or adjustment temperature, enters subsequent bio nitrification-denitrification processing unit.
As improvement of the present utility model, flocculant concentration pipeline can be set on the former water inlet channel of percolate and alkali adds pipeline.
As improvement of the present utility model, can adjust at PH and pond arrange steam-heated pipe line and alkali adds pipeline.
As improvement of the present utility model, can adjust at secondary PH and pond arrange steam-heated pipe line and sulfuric acid adds pipeline.
A described nitrification-denitrification processing unit, comprises anoxic pond, Aerobic Pond and settling tank.
Anoxic pond is connected with pretreatment unit by percolate water inlet pipe; Filling elastic filler in anoxic pond, Aerobic Pond, microorganic adhesion forms microbial film in elastic filler, and anoxic pond is connected with Aerobic Pond waterpower; Aerobic Pond is arranged air line and aerating apparatus;
The water outlet side top of Aerobic Pond is connected with settling tank (H) waterpower, and the top of settling tank has supernatant liquor rising pipe to be connected with chemical oxidation treatment unit, and settling tank bottom has precipitating sludge shore pipe to be connected to mud storage pool.
Load elastic filler in anaerobic-aerobic pond, microorganic adhesion forms microbial film in elastic filler; Anti-nitration reaction is carried out in anoxic pond; Nitration reaction is carried out in Aerobic Pond.Percolate enters settling tank behind anaerobic-aerobic pond, and the supernatant liquor after precipitation enters subsequent chemistry oxidation depth processing unit.
As improvement of the present utility model, can reflux pump and pipeline be set on Aerobic Pond, connect the water outlet side of Aerobic Pond and the influent side of anoxic pond, by the mixed-liquor return in Aerobic Pond to anoxic pond, utilize denitrifying bacterium that nitrate reduction is become gaseous nitrogen under anoxic conditions, remove the total nitrogen in waste water and BOD.
As improvement of the present utility model, can air line and aerating apparatus be set on Aerobic Pond.
Described chemical oxidation advanced treatment unit unit, comprises chemical oxidation reaction device and settling tank.
Described chemical oxidation reaction device is connected with a nitrification-denitrification processing unit by supernatant liquor rising pipe; Supernatant liquor rising pipe is connected with Fenton reagent and adds pipe and H 2sO 4add pipe, chemical oxidation reaction device is provided with the upper and lower of reflux pump and reflux line connection chemical oxidation reaction device; The water outlet side top of chemical oxidation reaction device is connected with settling tank by oxidation reactor rising pipe; This oxidation reactor rising pipe is connected with NaOH add pipe and PAC add pipe, the water outlet side top of settling tank has supernatant liquor rising pipe to be connected with second nitrification-denitrification processing unit, and the bottom of settling tank has precipitating sludge shore pipe to be connected to mud storage pool.
Supernatant liquor after precipitation enters chemical oxidation reaction device, adds Fenton reagent and produces deep oxidation reaction; The water outlet of chemical oxidation reaction device enters settling tank, and adjust ph, after settling tank precipitation, supernatant liquor enters secondary biological nitration-denitrification processing unit.
As improvement of the present utility model, Fenton reagent can be set at chemical oxidation reaction device inlet channel and add pipeline and H 2sO 4add pipeline.
As improvement of the present utility model, chemical oxidation reaction device can be provided with reflux pump and pipeline, connect chemical oxidation reaction device upper and lower, oxide treatment effect can be strengthened.
Described second nitrification-denitrification processing unit, comprises anoxic pond, Aerobic Pond and settling tank.
Anoxic pond is connected with chemical oxidation treatment unit by supernatant liquor rising pipe; Filling elastic filler in anoxic pond, Aerobic Pond, microorganic adhesion forms microbial film in elastic filler, and anoxic pond is connected with Aerobic Pond waterpower; Aerobic Pond is arranged air line and aerating apparatus; Meanwhile, this Aerobic Pond is also provided with mixed-liquor return pipe, connects the water outlet side of Aerobic Pond and the influent side of anoxic pond; The water outlet side top of Aerobic Pond is connected with settling tank waterpower, and there is supernatant liquor rising pipe on the top of settling tank and disinfects unit and be connected, and settling tank bottom has mud discharging pipe to be connected to mud storage pool through sludge pump by sludge pipe.
Load elastic filler in anaerobic-aerobic pond, microorganic adhesion forms microbial film in elastic filler; Anti-nitration reaction is carried out in anoxic pond; Nitration reaction is carried out in Aerobic Pond.Percolate enters settling tank behind anaerobic-aerobic pond, and the supernatant liquor after precipitation enters follow-uply disinfects unit.
As improvement of the present utility model, can reflux pump and pipeline be set on Aerobic Pond, connect the water outlet side of Aerobic Pond and the influent side of anoxic pond, by the mixed-liquor return in Aerobic Pond to anoxic pond, utilize denitrifying bacterium that nitrate reduction is become gaseous nitrogen under anoxic conditions, remove the total nitrogen in waste water and BOD.
Described unit of disinfecting comprises sterilization pool.Sterilization pool is connected with second nitrification-denitrification processing unit by supernatant liquor rising pipe; Sterilization pool is provided with dioxide peroxide and adds pipe, and delivery pipe is arranged at sterilization pool water outlet side top.
Supernatant liquor after precipitation enters sterilization pool disinfection, disinfects rear qualified discharge.
As improvement of the present utility model, sterilizing agent can be set at sterilization pool and add pipeline.
As improvement of the present utility model, pump, pipeline and mud storage pool are set, connect mud storage pool and each settling tank, the mud of each settling tank by Cemented filling to mud storage pool.
As improvement of the present utility model, arrange pump, pipeline and sludge filter press, mud storage pool enters mud pipe by sludge pump and enters mud pipe be connected with sludge filter press through sludge pump, pressure filter, and sludge filter press is connected with the former water water inlet pipe of percolate by pressing filtering liquid delivery pipe.The mud of mud storage pool is backfilled to landfill yard after sludge filter press press filtration, and pressing filtering liquid is processed to the former water water inlet of percolate by Cemented filling.
As improvement of the present utility model, be provided with pump, reflux sludge tube and reflux sludge tube, connect mud storage pool and anoxic pond, the partial sludge in mud storage pool is recycled to anoxic pond.
The utility model garbage leachate treatment device construction costs is low, Operation and Maintenance is simple, follow-up expense is few, and ton cost of water treatment is low; After sewage disposal, discharge meets national standard, and treatment effect is good; Go out water treatment up to standard.Whole Sewage treatment systems simple and convenient management, the present invention can be widely used in percolate from garbage filling field, sanitary sewage disposal.
Accompanying drawing explanation
Fig. 1 is the utility model garbage leachate treatment device unit composition schematic diagram
Fig. 2 is the utility model garbage leachate treatment device equipment layout schematic diagram
In Fig. 2:
A---settling tank: the former water water inlet pipe of 1-percolate, 2-molysite adds pipeline, and 3-alkali adds pipeline; 4-settling tank rising pipe; 5-sludge from sedimentation tank pipe;
B---one time pH adjusts pond: 6-steam-heated pipe line, and 7-alkali adds pipeline;
C---Ammonia blowing-out tower: 8-topping-up pump, 9-percolate transfer lime, 10-ammonia-containing exhaust transfer lime, 11-percolate delivery pipe;
D---ammonia absorber: 12-cleaning of off-gas delivery pipe;
E---secondary pH adjusts pond: 13-H 2sO 4add pipe; 14-steam-heated pipe line;
F---anoxic pond: 15-percolate water inlet pipe;
G---Aerobic Pond: 16-air line; 17-mixed-liquor return pipe;
H---settling tank: 18-supernatant liquor rising pipe, 19-precipitating sludge shore pipe;
I---chemical oxidation reaction device: 20-H 2sO 4add pipe, 21-Fenton reagent adds pipe, 22-reflux pump, 23-reflux line, 24-oxidation reactor rising pipe;
J---settling tank: 25-NaOH adds pipe, 26-PAC adds pipe, 27-supernatant liquor rising pipe, 28-precipitating sludge shore pipe;
K---anoxic pond: 30-mixed-liquor return pipe;
L---Aerobic Pond: 29-air line;
M---settling tank: 31-supernatant liquor rising pipe, 32-mud discharging pipe, 33-sludge pump, 34-sludge pipe;
N---sterilization pool: 35-dioxide peroxide adds pipe, 36-delivery pipe;
O---mud storage pool: 37-reflux sludge tube, 38-reflux sludge tube;
P---sludge filter press: 39-sludge pump enters mud pipe; 40-sludge pump; 41-pressure filter enters mud pipe, 42-pressing filtering liquid delivery pipe; 43-inlet mouth;
Embodiment
Below in conjunction with Fig. 1 and Fig. 2, the embodiment of the utility model garbage leachate treatment device is described:
The utility model garbage leachate treatment device, as shown in Figure 1, comprises following unit: (1) pretreatment unit; (2) nitrification-denitrification processing units; (3) chemical oxidation treatment unit; (4) second nitrification-denitrification processing unit; (5) unit is disinfected; (1) ~ (5) being linked in sequence between unit, percolate passes through successively (1) ~ (5) cell processing.
Pretreatment unit, comprises settling tank A, PH adjustment pond B, Ammonia blowing-out tower C, ammonia absorber D, a secondary PH adjusts pond E.
The former water water inlet pipe 1 of percolate connects settling tank A, the former water water inlet pipe 1 of percolate is provided with molysite and adds pipeline 2 and alkali adds pipeline 3, settling tank A top has settling tank rising pipe 4 to adjust pond B with a PH to be connected, and settling tank A bottom has sludge from sedimentation tank pipe 5 to be connected to mud storage pool O.
PH adjusts pond B and arranges steam-heated pipe line 6 and alkali adds pipeline 7, one time PH adjusts B bottom, pond is connected to Ammonia blowing-out tower C by percolate transfer lime 9 top through topping-up pump 8, the top of Ammonia blowing-out tower C has ammonia-containing exhaust transfer lime 10 to be connected to the bottom of ammonia absorber D, air enters the bottom, bottom of Ammonia blowing-out tower C from inlet mouth 43, and the top of ammonia absorber D has cleaning of off-gas delivery pipe 12 to lead directly to air; The bottom of Ammonia blowing-out tower C has percolate delivery pipe 11 connecting secondary PH to adjust pond E.
Secondary PH adjusts pond E and is provided with steam-heated pipe line 14 and H 2sO 4add pipeline 13, be connected with a nitrification-denitrification processing unit by percolate water inlet pipe 15.
A nitrification-denitrification processing unit, comprises anoxic pond F, Aerobic Pond G and settling tank H.
Anoxic pond F is connected with pretreatment unit by percolate water inlet pipe 15.Filling elastic filler in anoxic pond F, Aerobic Pond G, microorganic adhesion forms microbial film in elastic filler, and anoxic pond F is connected with Aerobic Pond G waterpower.Aerobic Pond G is arranged air line 16 and aerating apparatus.Aerobic Pond arranges mixed-liquor return pipe 17, connects the water outlet side of Aerobic Pond G and the influent side of anoxic pond F.
The water outlet side top of Aerobic Pond G is connected with settling tank H waterpower, and the top of settling tank H has supernatant liquor rising pipe 18 to be connected with chemical oxidation treatment unit, and settling tank H bottom has precipitating sludge shore pipe 19 to be connected to mud storage pool O.
Chemical oxidation treatment unit, comprises chemical oxidation reaction device I and settling tank J.
Chemical oxidation reaction device I is connected with a nitrification-denitrification processing unit by supernatant liquor rising pipe 18.Supernatant liquor rising pipe 18 is connected with Fenton reagent and adds pipe 21 and H 2sO 4add pipe 20, chemical oxidation reaction device I is provided with reflux pump 22 and reflux line 23, connects the upper and lower of chemical oxidation reaction device I; The water outlet side top of chemical oxidation reaction device I is connected with settling tank J by oxidation reactor rising pipe 24.
Oxidation reactor rising pipe 24 is connected with NaOH and adds pipe 25 and PAC adds pipe 26, the water outlet side top of settling tank J has supernatant liquor rising pipe 27 to be connected with second nitrification-denitrification processing unit, and the bottom of settling tank J has precipitating sludge shore pipe 28 to be connected to mud storage pool O.
Second nitrification-denitrification processing unit, comprises anoxic pond K, Aerobic Pond L and settling tank M.
Anoxic pond K is connected with chemical oxidation treatment unit by supernatant liquor rising pipe 27.Filling elastic filler in anoxic pond K, Aerobic Pond L, microorganic adhesion forms microbial film in elastic filler, and anoxic pond K is connected with Aerobic Pond L waterpower.Aerobic Pond L is arranged air line 29 and aerating apparatus.Aerobic Pond arranges mixed-liquor return pipe 30, connects the water outlet side of Aerobic Pond L and the influent side of anoxic pond K.
The water outlet side top of Aerobic Pond L is connected with settling tank M waterpower, and there is supernatant liquor rising pipe 31 on the top of settling tank M and disinfects unit and be connected, and settling tank M bottom has mud discharging pipe 32 to be connected to mud storage pool O through sludge pump 33 by sludge pipe 34.
Disinfect unit and comprise sterilization pool N.
Sterilization pool N is connected with second nitrification-denitrification processing unit by supernatant liquor rising pipe 31.Sterilization pool N is provided with dioxide peroxide and adds pipe 35, and delivery pipe 36 is arranged at sterilization pool N water outlet side top.
Be provided with pump, reflux sludge tube 37 and reflux sludge tube 38, connect mud storage pool O and anoxic pond F and anoxic pond K, the partial sludge in mud storage pool is recycled to anoxic pond.
Mud storage pool O enters mud pipe 39 by sludge pump and enters mud pipe 41 be connected with sludge filter press P through sludge pump 40, pressure filter, and sludge filter press P is connected with the former water water inlet pipe 1 of percolate by pressing filtering liquid delivery pipe 42.
Landfill leachate treatment process is as follows:
Percolate enters settling tank A by the former water water inlet pipe 1 of percolate, add pipe 2 through molysite and in the percolate in the former water water inlet pipe 1 of percolate, add Ferric Salt Flocculants by line mixer, simultaneously add pipeline 3 by alkali as required and add NaOH in right amount to the former water water inlet pipe 1 of percolate and regulate percolate pH to be 7 ~ 9.The sedimentation time of percolate in settling tank A is 1 ~ 3 hour.The mud of settling tank A enters mud storage pool O through sludge from sedimentation tank pipe 5, the water outlet of settling tank A enters a pH by settling tank rising pipe 4 and adjusts pond B, in this pond, add pipeline 7 by alkali add NaOH and regulate percolate pH to be 10.5 ~ 11.5, while adjustment pH, in a pH adjustment pond B, pass into appropriate high temperature saturated vapor by steam-heated pipe line 6 according to the temperature of the percolate measured to heat percolate, the temperature of the percolate before making to enter stripping tower is not less than 10 DEG C.Percolate in a pH adjustment pond B is delivered to Ammonia blowing-out tower C by topping-up pump 8 through percolate transfer lime 9, percolate flows from the top of Ammonia blowing-out tower C to tower bottom, air flows from tower bottom to top of tower, ammonia nitrogen in stripping percolate, vapour-liquid ratio in Ammonia blowing-out tower C is 2000 ~ 3500, stripping tail gas containing ammonia enters bottom ammonia absorber D from Ammonia blowing-out tower C tower top by ammonia-containing exhaust transfer lime 10, percolate enters secondary pH by percolate delivery pipe 11 and adjusts pond E bottom Ammonia blowing-out tower C, in this pond, pass through H 2sO 4add pipe 13 and add H 2sO 4regulate the pH of percolate between 7 ~ 8.5, pass into appropriate high temperature saturated steam according to the temperature of percolate in pond through steam-heated pipe line 14 simultaneously and percolate is heated, make the temperature of the percolate entering anoxic pond F be not less than 15 DEG C.
The percolate that secondary pH adjusts in the E of pond enters anoxic pond F through percolate water inlet pipe 15.Load elastic filler in anoxic pond F, microorganic adhesion forms microbial film in elastic filler; Control dissolved oxygen content in anoxic pond and be not more than 0.4mg/L.Arrange aerating apparatus in Aerobic Pond G, gas enters from air line 16, and in Aerobic Pond G, dissolved oxygen content controls at 2 ~ 5mg/L.Nitric nitrogen is oxidized under the effect of the nitrobacteria of the ammonia nitrogen in percolate in Aerobic Pond G and nitrite bacteria.Nitric nitrogen in Aerobic Pond G is back to anoxic pond F by mixed-liquor return pipe 17, under the effect of the denitrifying bacterium in anoxic pond F, denitrification process occurs, and removes the total nitrogen in percolate and BOD.
Percolate is after the reaction of first step anaerobic-aerobic, enter settling tank H from Aerobic Pond G and carry out solid-liquid separation, the supernatant liquor of settling tank H enters Fenton chemical oxidation reaction device I by No. 18, supernatant liquor rising pipe, and the mud of settling tank H enters mud storage pool O by precipitating sludge shore pipe 19.
The oxygenant that Fenton chemical oxidation reaction device I adopts is Fenton reagent, and Fenton reagent is hydrogen peroxide and catalyst Fe 2+the oxidation system formed, Fe in Fenton reagent 2+with H 2o 2mass ratio be 0.75: 1 ~ 1.2: 1, in Fenton reagent, in hydrogen peroxide and pending water, COD mass ratio is 0.5: 1 ~ 2.4: 1, and Fenton reagent adds pipe 21 by Fenton reagent and adds in pending percolate by line mixer, H 2sO 4by H 2sO 4adding pipe 20 adds in pending percolate by line mixer, regulates the pH=3 of percolate.For enhancement process effect, reflux pump 22 is set Fenton chemical oxidation reaction device I upper flow is led back bottom.
The water outlet of Fenton chemical oxidation reaction device I enters settling tank J through Fenton oxidation reactor rising pipe 24, add pipe 25 by NaOH and add pH to 7 ~ 8.5 in NaOH equalizing tank, add pipe 26 by PAC and add PAC (polymerize aluminum chloride) coagulating agent, percolate is flocculation sediment in settling tank J, supernatants after precipitation enters anoxic pond K by supernatant liquor rising pipe 27, and the mud of settling tank J enters mud storage pool O by No. 28 pipelines.
Load elastic filler in anoxic pond K, microorganic adhesion forms microbial film in elastic filler; Control dissolved oxygen content in anoxic pond K and be not more than 0.4mg/L.Arrange aerating apparatus in Aerobic Pond L, gas enters from air line 29, and in Aerobic Pond, dissolved oxygen content controls at 2 ~ 5mg/L.Nitric nitrogen is oxidized under the effect of the nitrobacteria of the ammonia nitrogen in percolate in Aerobic Pond L and nitrite bacteria.Nitric nitrogen in Aerobic Pond L flow to anoxic pond K by No. 30 back of pipelines, in anoxic pond K denitrifying bacterium effect under there is denitrification process, remove the total nitrogen in percolate and BOD.
Percolate is after the reaction of second stage anaerobic-aerobic, enter settling tank M from the top water outlet of Aerobic Pond L and carry out solid-liquid separation, the supernatant liquor of settling tank M enters sterilization pool N by supernatant liquor rising pipe 31, and the mud of settling tank M enters mud storage pool O via sludge pump 33 by sludge pipe 34 by mud discharging pipe 32.
Sterilization pool N adds pipe 35 through dioxide peroxide and adds dioxide peroxide and carry out disinfection, and sterile-processed water is by delivery pipe 36 qualified discharge.
A mud part in mud storage pool O is back to anoxic pond F, anoxic pond K respectively by reflux sludge tube 37, reflux sludge tube 38, excess sludge enters mud pipe 39 through sludge pump, sludge pump 40, pressure filter enter mud pipe 41, dewatered by pressure filter P, mud after dehydration is backfilled to landfill yard, and the pressing filtering liquid that sludge dewatering produces is back to the former water water inlet pipe 1 of percolate by pressing filtering liquid delivery pipe 42 and processes.

Claims (4)

1. a garbage leachate treatment device, it is characterized in that: comprise pretreatment unit, nitrification-denitrification processing unit, chemical oxidation treatment unit, a second nitrification-denitrification processing unit, disinfect unit and mud storage pool, processing unit is linked in sequence;
Described pretreatment unit, comprises settling tank (A), a pH adjusts pond (B), Ammonia blowing-out tower (C), ammonia absorber (D), secondary pH adjustment pond (E);
The former water water inlet pipe (1) of percolate connects settling tank (A), the former water water inlet pipe (1) of percolate is provided with molysite and adds pipeline (2) and alkali adds pipeline (3), settling tank (A) top has settling tank rising pipe (4) to adjust pond (B) with a pH to be connected, and settling tank (A) bottom has sludge from sedimentation tank pipe (5) to be connected to mud storage pool (O);
PH adjusts pond (B) and arranges steam-heated pipe line (6) and alkali adds pipeline (7), one time pH adjusts pond (B) bottom is connected to Ammonia blowing-out tower (C) by percolate transfer lime (9) top through topping-up pump (8), the top of Ammonia blowing-out tower (C) has ammonia-containing exhaust transfer lime (10) to be connected to the bottom of ammonia absorber (D), and the top of ammonia absorber (D) has cleaning of off-gas delivery pipe (12) to lead directly to air; Inlet mouth 43 is arranged at the bottom of Ammonia blowing-out tower (C), and percolate delivery pipe (11) connecting secondary pH adjusts pond (E);
Secondary pH adjusts pond (E) and is provided with steam-heated pipe line (14) and H 2sO 4add pipeline (13), be connected with a nitrification-denitrification processing unit by percolate water inlet pipe (15);
A described nitrification-denitrification processing unit, comprises anoxic pond (F), Aerobic Pond (G) and settling tank (H);
Anoxic pond (F) is connected with pretreatment unit by percolate water inlet pipe (15); Filling elastic filler in anoxic pond (F), Aerobic Pond (G), microorganic adhesion forms microbial film in elastic filler, and anoxic pond (F) is connected with Aerobic Pond (G) waterpower; Aerobic Pond (G) is arranged air line (16) and aerating apparatus;
The water outlet side top of Aerobic Pond (G) is connected with settling tank (H) waterpower, the top of settling tank (H) has supernatant liquor rising pipe (18) to be connected with chemical oxidation treatment unit, and settling tank (H) bottom has precipitating sludge shore pipe (19) to be connected to mud storage pool (O);
Described chemical oxidation treatment unit, comprises chemical oxidation reaction device (I) and settling tank (J);
Chemical oxidation reaction device (I) is connected with a nitrification-denitrification processing unit by supernatant liquor rising pipe (18); Supernatant liquor rising pipe (18) is connected with Fenton reagent and adds pipe (21) and H 2sO 4add pipe (20), chemical oxidation reaction device (I) is provided with reflux pump (22) and reflux line (23), connects the upper and lower of chemical oxidation reaction device (I); The water outlet side top of chemical oxidation reaction device (I) is connected with settling tank (J) by oxidation reactor rising pipe (24);
Oxidation reactor rising pipe (24) is connected with NaOH and adds pipe (25) and PAC adds pipe (26), the water outlet side top of settling tank (J) has supernatant liquor rising pipe (27) to be connected with second nitrification-denitrification processing unit, and the bottom of settling tank (J) has precipitating sludge shore pipe (28) to be connected to mud storage pool (O);
Described second nitrification-denitrification processing unit, comprises anoxic pond (K), Aerobic Pond (L) and settling tank (M);
Anoxic pond (K) is connected with chemical oxidation treatment unit by supernatant liquor rising pipe (27); Filling elastic filler in anoxic pond (K), Aerobic Pond (L), microorganic adhesion forms microbial film in elastic filler, and anoxic pond (K) is connected with Aerobic Pond (L) waterpower; Aerobic Pond (L) is arranged air line (29) and aerating apparatus;
The water outlet side top of Aerobic Pond (L) is connected with settling tank (M) waterpower, there is supernatant liquor rising pipe (3) 1 on the top of settling tank (M) and disinfects unit and be connected, and settling tank (M) bottom has mud discharging pipe (32) to be connected to mud storage pool (O) through sludge pump (33) by sludge pipe (34);
Described unit of disinfecting comprises sterilization pool (N);
Sterilization pool (N) is connected with second nitrification-denitrification processing unit by supernatant liquor rising pipe (31);
Sterilization pool (N) is provided with dioxide peroxide and adds pipe (35), and delivery pipe (36) is arranged at sterilization pool (N) water outlet side top.
2. a kind of garbage leachate treatment device according to claim 1, is characterized in that:
Aerobic Pond arranges mixed-liquor return pipe, connects the water outlet side of Aerobic Pond and the influent side of anoxic pond.
3., according to the arbitrary described a kind of garbage leachate treatment device of claim 1 ~ 2, it is characterized in that:
Also be provided with sludge filter press (P), mud storage pool (O) enters mud pipe (39) by sludge pump and enters mud pipe (41) be connected with sludge filter press (P) through sludge pump (40), pressure filter, and sludge filter press (P) is connected by the former water water inlet pipe (1) of pressing filtering liquid delivery pipe (42) and percolate.
4., according to the arbitrary described a kind of garbage leachate treatment device of claim 1 ~ 2, it is characterized in that:
Also be provided with pump, reflux sludge tube and reflux sludge tube, connect mud storage pool and anoxic pond.
CN201520510560.1U 2015-07-10 2015-07-10 Landfill leachate treatment device Active CN205035215U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108264380A (en) * 2017-12-13 2018-07-10 深圳市龙吉顺实业发展有限公司 A kind of city organic waste joint system for anaerobic treatment and method
CN108503122A (en) * 2017-02-28 2018-09-07 中国石油化工股份有限公司 A method of adding polyurethane filler processing high ammonia-nitrogen wastewater
CN109851182A (en) * 2019-04-12 2019-06-07 湖南湘奈环保科技有限责任公司 A kind of processing method of landfill leachate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108503122A (en) * 2017-02-28 2018-09-07 中国石油化工股份有限公司 A method of adding polyurethane filler processing high ammonia-nitrogen wastewater
CN108264380A (en) * 2017-12-13 2018-07-10 深圳市龙吉顺实业发展有限公司 A kind of city organic waste joint system for anaerobic treatment and method
CN109851182A (en) * 2019-04-12 2019-06-07 湖南湘奈环保科技有限责任公司 A kind of processing method of landfill leachate

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