CN106587526A - Treatment method of deaminized landfill leachate - Google Patents

Abstract

The invention provides a treatment method of deaminized landfill leachate. The treatment method comprises the processes of CO2 preneutralization, liquid-solid separation, manganese powder reduction through CO2 pressurization under an ultrasonic wave effect, anaerobic treatment, aerobiotic treatment, biologic filtering tower treatment and the like. Treated waste water can be stably discharged in an up-to-standard mode.

Description

The processing method of the percolate after deamination process

Technical field

The present invention relates to a kind of processing method of the percolate Jing after deamination process.

Background technology

Garbage loading embeading inevitably produces percolate.Pollutants from landfill leachate COD concentration is high, and composition is multiple Miscellaneous, intractability is big.If the waste water is not processed is directly discharged into environment, severe contamination will be caused to environment.Current percolate The main method combined using biological treatment and materializing strategy is processed.It is a considerable amount of due to containing in percolate Persistence organic pollutant（Containing phenyl ring and（Or）Heterocycle organic matter）, thereby resulting in Biochemical method percolate can not be up to standard Discharge.Generally percolate first uses blow-off method deamination, then Jing biological treatments, eventually passes counter-infiltration or advanced oxidation（Such as Fenton methods, catalytic oxidation etc.）Further processing could qualified discharge.Reverse-osmosis treated can produce concentrated water, this part concentrated water General recharge landfill waste, the salinity for thus causing percolate increases, reverse-osmosis treated is adversely affected, when serious Reverse osmosis treatment system is caused to be paralysed.Advanced oxidation processes processing cost is high.Development cost is low, the rubbish of energy stably reaching standard discharge oozes The processing method of filtrate has larger practical value.

The content of the invention

For the problem that current method for treating garbage percolation liquid is present, the purpose of the present invention is to find low cost, can stablize The processing method of the percolate of qualified discharge, it is characterised in that by the percolate CO Jing after deamination process₂（CO₂Can Being industrial CO₂, or fuel combustion, the CO that mineral decompose, sweat is produced₂）PH value is neutralized less than 7, liquid is carried out Gu separating, the waste water isolated enters regulating reservoir, and the solid isolated returns refuse landfill landfill.After adjusted pond is adjusted Waste water sends into voltage-resistant reactor, and cleaning manganese powder is added into reactor, under ul-trasonic irradiation and is passed through industrial CO₂Reacted. The granularity of manganese powder is less than 180 mesh, and every liter of waste water adds manganese powder 10g～40g.The stirring reaction time is 20min～45min.Reaction Temperature is 25 DEG C～60 DEG C.CO₂Pressure be 0.3MPa～1.0MPa.The power of every cubic metre of waste water input ultrasonic wave is 2kW ～8kW.Reacted waste water carries out solid-liquor separation, the manganese powder Returning reactor isolated.Waste water lime after solid-liquor separation Breast or other alkaline matters adjust its pH value to 7.0～8.5, subsequently into anaerobic reactor.Waste water is stopped in anaerobic reactor 24h～120h, anaerobism temperature is 25 DEG C～55 DEG C.Waste water after anaerobism is processed into biology aerobic pond normal temperature, during Aerobic Process for Treatment Between be 6h～16h.Waste water after Aerobic Process for Treatment enters sedimentation basin, and the sedimentation time is 1h～3h.Irregularly extract out from sedimentation basin Sludge is filtered, and filter cake returns refuse landfill landfill, and filtrate returns Aerobic Pond.The supernatant waste water of sedimentation basin send multi-layer biological Filter tower process.The filler of biological filtering tower combined working is activated carbon or porous ceramic grain, is 0.5m～2.0m per thickness degree, gross thickness be 2m～ 4m.The dominant bacteria of biological filtering tower combined working is the red pseudomonas in photosynthetic bacteria（Rhodopseudomonas）.The water of biological filtering tower combined working Power load is 40 m³/m².d～100m³/m².d.The standard water discharge discharge of biological filtering tower combined working.

The object of the present invention is achieved like this, Jing deaminations process percolate solid matter it is more, basicity compared with Height, if using adding milk of lime to carry out stripping deamination technique, the percolate contains more Ca²⁺, it and CO₂It is anti-in percolate CaCO should be generated₃.Before into manganese powder reduction reactor, CO is used₂Preneutralization precipitation is carried out, and carries out solid-liquor separation, it is to avoid solid-state Material and generation CaCO₃Impact to manganese powder reduction, is also beneficial to the complete manganese powder recycling of unreacted.The waste water isolated Into after manganese powder reduction reactor, the larger molecular organicses in waste water, particularly persistence organic pollutant（Containing phenyl ring and（Or） The organic matter of heterocycle etc.）The effect of the strong reduction free radical for producing is reduced by manganese powder and is destroyed, be that subsequent biochemical processes creation Advantage.It is passed through pressure CO₂Purpose be to maintain manganese powder to reduce suitable pH value（2.0～5.0）, it is input into the effect of ultrasonic wave It is to speed up the mass transport process of reduction reaction.Waste water milk of lime or other alkaline matters after reduction adjusts its pH value, to meet The requirement of follow-up anaerobic and aerobic process.The premenstrual waste water for stating process in anaerobic processes, by the effect of microorganism, macromolecular Organic matter further becomes small organic molecule, is that more favorable condition is created in subsequent bio oxidation.By biological oxidation process, remain Remaining most of organic matters are removed, while going to denitrogenate the pollutants such as phosphorus.Waste water finally enters activated carbon or porous ceramic grain is biological Filter tower, in the presence of microorganism, particularly red pseudomonas, the pollutant such as further organics removal and nitrogen phosphorus, it is ensured that place Waste water stably reaching standard discharge after reason.

Relative to existing method, the outstanding advantages of the present invention are reduced using manganese powder, by the persistence in percolate Organic pollution is destroyed, and is that subsequent biological treatment creates favorable conditions, so as to ensure the waste water stably reaching standard discharge after processing；Phase For the metal deoxidization used in other wastewater treatments, using CO₂Now widely used sulfuric acid is replaced to make acidulant, no Introduce SO₄ ^2-Ion, eliminates generation H₂The material base of S, so as to avoid H₂The pollution of S, while it also avoid SO₄ ^2-To detesting Oxygen and it is aerobic during microorganism inhibitory action, greatly improve the efficiency of biological treatment；Contain in refuse landfill landfill waste gas There is abundant CO₂Waste gas is available for utilizing, and can not only reduce processing cost, and can reduce carbon emission；Waste water energy after process is steady Qualified discharge is determined, with obvious economic benefit and environmental benefit.

Specific implementation method

Embodiment 1：1m is processed daily³Deamination percolate（Composition：COD_Cr45000 mg/L、NH₃-N115 mg/L、T- P30mg/L）, Jing CO₂Preneutralization, solid-liquor separation, manganese powder reduction（20min、40℃、CO₂Pressure 0.8MPa, every liter of waste water add manganese Powder 30g, every cubic metre of waste water are input into the power 4kW of ultrasonic wave）, anaerobism（PH8.5,96h, 25 DEG C～35 DEG C）, it is aerobic（10h）With Biological filtering tower combined working（Porous ceramic grain packing layer gross thickness 4m, hydraulic load 100m³/m².d）The COD of water outlet after process_CrFor 84mg/L, NH₃-N 7.9mg/L、T-P0.4mg/L。

Embodiment 2：5m is processed daily³Deamination percolate（Composition: COD_Cr18000 mg/L、NH₃-N43 mg/L、 T-P13mg/L）, Jing CO₂Preneutralization, solid-liquor separation, manganese powder reduction（35min、25℃、CO₂Pressure 0.3MPa, every liter of waste water are added Manganese powder 10g, every cubic metre of waste water are input into the power 2kW of ultrasonic wave）, anaerobism（PH7.0,24h, 35 DEG C～55 DEG C）, it is aerobic（6h） And biological filtering tower combined working（Active carbon filler layer gross thickness 2m, hydraulic load 50m³/m².d）The COD of water outlet after process_CrFor 70mg/L, NH₃-N 6.2mg/L、T-P0.4mg/L。

Claims (1)

1. it is a kind of Jing deamination process after percolate processing method, it is characterised in that by Jing deamination process after rubbish Percolate CO₂PH value is neutralized less than 7, solid-liquor separation is carried out, the waste water isolated enters regulating reservoir, and the solid isolated is returned Refuse landfill landfill is returned, the waste water after adjusted pond is adjusted sends into voltage-resistant reactor, cleaning manganese powder is added into reactor, super Under sound wave effect and it is passed through industrial CO₂Reacted, the granularity of manganese powder is less than 180 mesh, and every liter of waste water adds manganese powder 10g～40g, The stirring reaction time is 20min～45min, and reaction temperature is 25 DEG C～60 DEG C, CO₂Pressure be 0.3MPa～1.0MPa, often The power of cubic meter waste water input ultrasonic wave is 2kW～8kW, and reacted waste water carries out solid-liquor separation, and the manganese powder isolated is returned Reactor is returned, the waste water milk of lime or other alkaline matters after solid-liquor separation adjusts its pH value to 7.0～8.5, subsequently into Anaerobic reactor, waste water stops 24h～120h in anaerobic reactor, and anaerobism temperature is 25 DEG C～55 DEG C, and the waste water after anaerobism enters Enter biology aerobic pond normal temperature to process, the Aerobic Process for Treatment time is 6h～16h, and the waste water after Aerobic Process for Treatment enters sedimentation basin, during precipitation Between be 1h～3h, irregularly extract sludge out from sedimentation basin and filtered, filter cake returns refuse landfill landfill, and filtrate returns Oxygen pond, the supernatant waste water of sedimentation basin send multi-layer biological filter tower to process, and the filler of biological filtering tower combined working is activated carbon or porous ceramic grain, filler Gross thickness is 2m～4m, and the dominant bacteria of biological filtering tower combined working is the red pseudomonas in photosynthetic bacteria, the hydraulic load of biological filtering tower combined working For 40 m³/m².d～100m³/m².d, the standard water discharge discharge of biological filtering tower combined working.