CN208869459U - A kind of processing system of landfill leachate - Google Patents

Abstract

The utility model relates to a kind of processing systems of landfill leachate, successively include pretreatment system, biochemical treatment system and advanced treatment system；The pretreatment system includes conditioning tank, primary sedimentation tank, chemical precipitation pond, light Fenton oxidation pond；The biochemical treatment system includes anaerobic ammonia oxidation reactor and MBR reactor；The advanced treatment system includes disc tube reverse osmosis (dt-ro) film device；Wherein, chemical precipitation pond connection guanite and inorganic flocculating agent throwing device.By preferably pre-processing+biochemical treatment+advanced treating means, it ensure that whole system design rationally, efficiently, completely, is discharged all index qualified discharges, be worthy to be popularized use.

Description

A kind of processing system of landfill leachate

Technical field

The utility model relates to a kind of processing system of waste water more particularly to a kind of processing systems of landfill leachate.

Background technique

Landfill leachate is a kind of high concentrated organic wastewater, its moisture and rainwater contained by the rubbish itself, Snow-broth etc. enters the moisture of landfill yard, and deducts the waste water for covering the saturation moisture capacity with soil horizon by rubbish and being formed.Rubbish Percolate has the characteristics that coloration is big, water quality is complicated, organic pollutant category is more, nitrogen content is high, nutritive proportion imbalance, untreated Landfill leachate flowing through surface water, soil or even permeating the ground after water, serious influence can be caused on environment, is formed secondary Pollution, or even endanger the health of people.It is reported that containing about 77 kinds of organic matter in landfill leachate, wherein can carcinogenic substance 1 kind of matter, 5 kinds of co-carcinogen, are put into 5 kinds of organic matter of China's priority pollutant " blacklist " or more, contain 10 A variety of harmful heavy metal ions.

The processing method of landfill leachate has: bioanalysis, physical-chemical process and land treatment systems method.Currently, processing rubbish seeps The main method of filtrate is still biotechnology, but this method, with the growth of processing time, the biodegradability of percolate is more next It is poorer.Therefore, it is difficult to reach ideal effect only with common biologic treating technique, needs some measures to carry out at early period Reason, the biodegradability of Lai Tigao landfill leachate.In addition, percolate, after Biochemical method, water outlet COD (COD) is difficult With up to standard, and the water humus containing difficult for biological degradation, advanced treating need to be carried out using physico-chemical process.

Pretreatment is an important technical links in landfill leachate treatment, and main purpose is to reduce organic matter and ammonia Nitrogen load adjusts carbon-nitrogen ratio, improves the biodegradability of garbage leachate, handles energy efficiency for subsequent biochemical.Rubbish is improved to seep Filtrate biodegradability, main technological means have advanced oxidation processes (AOP), as Fenton process (Fenton), Ozonation, electricity are urged Change oxidizing process, supercritical water oxidation method, wet oxidation process etc..Common materialization depth logos mainly has three classes: chemical oxidation Method, active carbon adsorption and membrane filter method.And membrane separation technique as landfill leachate advanced treatment process when, it is contemplated that micro-filtration (MF) film and ultrafiltration (UF) membrane aperture are larger, lower to pollutants removal rate, generally as the preconditioning technique of percolate；Nanofiltration (NF) film and reverse osmosis (RO) film are higher to pollutants removal rate in percolate, are that landfill leachate advanced treating is preferably square Formula.

The biochemistry combination process of landfill leachate biochemical processing process, usually anaerobism+aerobic.However, landfill leachate Middle ammonia nitrogen concentration is high, will lead to carbon source deficiency, and nutritive proportion imbalance inhibits the activity of microorganism in biochemical treatment, causes rubbish The removal rate of total nitrogen is not high in percolate processing.Therefore, the development trend of landfill leachate biochemical technology is to improve going for total nitrogen Except efficiency, the consumption of carbon source is reduced, reduces energy consumption.

Advantage and disadvantage, cost for wastewater treatment and stringent Effluent criteria based on the prior art, study landfill leachate Processing technique has great significance to water pollution, protection environment and resource utilization is reduced.In view of landfill leachate can give birth to The property changed difference and ammonia nitrogen concentration are high, and therefore, pre-treatment and biochemical treatment means are whether to influence water treatment effect and water outlet Key up to standard.

Utility model content

The utility model aim is in view of the deficiencies of the prior art, to provide a kind of efficient landfill leachate treatment system System.

The garbage percolation liquid treating system of the utility model successively includes pretreatment system, biochemical treatment system and depth Processing system；The pretreatment system includes conditioning tank, primary sedimentation tank, chemical precipitation pond, light Fenton oxidation pond；The biochemistry System includes anaerobic ammonia oxidation reactor and MBR reactor；The advanced treatment system includes disc tube reverse osmosis (dt-ro) film device； Wherein, chemical precipitation pond connection guanite and inorganic flocculating agent throwing device and agitating device；The light Fenton oxygen Change pond and connects Fenton reagent, stabilizer, initiator adding set.

Further, the inorganic flocculating agent is using aluminium chloride and calcium chloride.

Further, the stabilizer is the Compound-acid of glycolic and oxalic acid, and initiator is carbohydrate.

Further, the Anaerobic ammonium oxidation system uses granule sludge sbr reactor device.

After landfill leachate passes through conditioning tank homogeneity, preliminary sedimentation removal of impurities, and guanite is utilized in chemical precipitation pond And inorganic composite flocculant, tentatively remove ammonia nitrogen and the suspended matter etc. in water removal；Light Fenton oxidation pond is under ultraviolet irradiation condition The process of advanced oxidation degradation is carried out, and stabilizer, initiator collaboration illumination is added specifically to improve Fenton oxidation effect；It is biochemical System is specifically chosen the granule sludge sbr reactor device and MBR reactor of further efficient denitrification.Disc tube reverse osmosis (dt-ro) film is to rubbish The treatment effect of percolate is preferable, as further treatment technique, further retains organic matter, metal ion, colloidal particle and consolidates Standard water discharge can be completely secured in body particle etc..

The utility model compared with prior art, has following substantive distinguishing features and remarkable advantage:

(1) in pretreatment system, the ammonia nitrogen in landfill leachate is tentatively removed using guanite, is reduced at subsequent biochemical The load of reason；And ferrous ion and phosphate can be prevented by being added to stabilizer and initiator in light Fenton oxidation pond Ferric phosphate precipitating is formed, and facilitates quick start Fenton's reaction and improves wastewater biodegradability；The calcium ion and aluminium of addition from Son is easier to be formed with phosphate radical and precipitate compared to ferrous ion, to further eliminate the phosphate radical in water.

(2) in biochemical treatment system, it is contemplated that landfill leachate water quality characteristics, in order to further remove ammonia nitrogen and COD, benefit Denitrogenation is carried out with granule sludge sbr reactor device, obtains preferable bio-chemical effluent using MBR reactor.

(3) in advanced treatment system, it is contemplated that dish tubular reactor (DTRO) is influenced very little by influent quality, is specifically used for In the advanced treating of percolate, it is up to standard effluent quality can be completely secured.

Detailed description of the invention

Fig. 1 is the connection schematic diagram of Tthe utility model system.

It is identified in figure: 1- conditioning tank, 2- primary sedimentation tank, 3- chemical precipitation pond, 4- light Fenton oxidation pond, 5- granule sludge SBR Reactor, 6-MBR reactor, 7- disc tube reverse osmosis (dt-ro) film device, 8- guanite and inorganic flocculating agent throwing device；9-Fenton Reagent, stabilizer, initiator adding set；10- agitating device；11- ultraviolet source.

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Specific embodiment

Technical solutions of the utility model are described in detail below by attached drawing, but the protection scope of the utility model It is not limited to the embodiment.

The processing system of the landfill leachate of the utility model embodiment successively includes pretreatment system, biochemical treatment system System and advanced treatment system；The pretreatment system includes conditioning tank 1, primary sedimentation tank 2, chemical precipitation pond 3, light Fenton oxidation pond 4；The biochemical system includes granule sludge sbr reactor device 5 and MBR reactor 6；The advanced treatment system includes dish pipe Formula reverse osmosis membrane apparatus 7；Wherein, chemical precipitation pond connection guanite and inorganic flocculating agent throwing device 8 and agitating device 10；Institute The connection of light Fenton oxidation the pond Fenton reagent, stabilizer, initiator adding set 9 stated.

Preferably, the inorganic flocculating agent is aluminium chloride and calcium chloride.On the one hand it adds as coagulant, on the one hand adds The calcium ion and aluminium ion entered is easier to be formed with phosphate radical and precipitate compared to ferrous ion, to further eliminate the phosphorus in water Acid group.

Preferably, the stabilizer is the Compound-acid of glycolic and oxalic acid, and initiator is carbohydrate.Stabilizer can To prevent ferrous ion and phosphate from forming ferric phosphate precipitating, initiator, which facilitates quick start Fenton's reaction raising waste water, to give birth to The property changed.

Preferably, the biodegradability of percolate can be improved in granule sludge sbr reactor device, and is subsequent Aerobic Process for Treatment energy conservation Synergy.

Landfill leachate is after the processing of pretreatment system, biochemical treatment system and advanced treatment system, effluent quality symbol It closes " household refuse landfill sites pollutant catabolic gene standard " (GB 16889-2008).

The processing technological flow for carrying out landfill leachate using utility model device is as follows:

(1) landfill leachate is discharged into conditioning tank first, carries out homogeneity processing and preliminary sedimentation removal of impurities；Then chemistry is utilized Sedimentation basin carries out coagulation, precipitation process, and is removed to ammonia nitrogen, phosphate and the suspended contamination etc. in water；Water outlet is discharged into In light Fenton oxidation pond, through peroxide degradation, the biodegradability of waste water is improved；

(2) landfill leachate after materialized pretreatment is in biochemical treatment system, using suitable anaerobism+aerobic hand Section substantially improves effluent quality to further biochemical degradations such as ammonia nitrogen, COD in percolate.

(3) in last advanced treating, according to water quality characteristics and treatment effeciency, DTRO is selected finally to retain the organic of water outlet Object, metal ion, colloidal particle and solia particle, to guarantee that water quality is completely up to standard.

The above is preferred embodiments of the present invention, certainly cannot with this come limit the utility model it Interest field, it is noted that for those skilled in the art, the technical solution of the utility model is carried out Modification or equivalent replacement, without departure from the protection scope of technical solutions of the utility model.

Claims (4)

1. a kind of processing system of landfill leachate, which is characterized in that successively include pretreatment system, biochemical treatment system and depth Spend processing system；

The pretreatment system includes conditioning tank, primary sedimentation tank, chemical precipitation pond, light Fenton oxidation pond；

The biochemical treatment system includes anaerobic ammonia oxidation reactor and MBR reactor；

The advanced treatment system includes disc tube reverse osmosis (dt-ro) film device；

Wherein, chemical precipitation pond connection guanite and inorganic flocculating agent throwing device and agitating device；The light is fragrant The oxidation pond that pauses connects Fenton reagent, stabilizer, initiator adding set.

2. a kind of processing system of landfill leachate according to claim 1, which is characterized in that the inorganic flocculating agent For aluminium chloride and calcium chloride.

3. a kind of processing system of landfill leachate according to claim 1, which is characterized in that the stabilizer is second The Compound-acid of alkyd and oxalic acid, initiator are carbohydrate.

4. a kind of processing system of landfill leachate according to claim 1, which is characterized in that the Anammox Reactor is granule sludge sbr reactor device.