CN106517688A - Treatment method for landfill leachate obtained after deamination treatment - Google Patents

Abstract

The invention provides a treatment method for landfill leachate obtained after deamination treatment. The treatment method comprise the processes of CO2 preneutralization, liquid-solid separation, CO2 pressurizing iron-aluminum-manganese composite powder reduction, anaerobic treatment, aerobic treatment, biological filtration tower treatment and the like. Wastewater obtained after treatment can be stably discharged after reaching the standard.

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 substance）, 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 reverse osmosiss 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, thus causes the salinity of percolate to increase, 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, cleaning iron-aluminum-manganese composite powder is added reactor, and is passed through industrial CO₂Reacted, iron-aluminum-manganese The granularity of composite powder is less than 180 mesh, and in iron-aluminum-manganese composite powder, the content of every kind of metal is not less than 5%（The iron-aluminum-manganese that return is used is multiple Close powder not limited）, every liter of waste water addition iron-aluminum-manganese composite powder 10g～40g, the stirring reaction time is 1h～3h, reacts temperature Spend for 25 DEG C～60 DEG C, CO₂Pressure be 0.3MPa～1.0MPa.Reacted waste water carries out solid-liquor separation, the ferrum isolated Aluminum manganese composite powder Returning reactor.Waste water lime cream or other alkaline matters after solid-liquor separation adjust 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.Detest Into the process of biology aerobic pond room temperature, the Aerobic Process for Treatment time is 6h～16h to waste water after oxygen.Waste water after Aerobic Process for Treatment enters heavy Shallow lake pond, sedimentation time are 1h～3h.Irregularly extract sludge out from sedimentation tank to be filtered, filter cake returns refuse landfill and fills out Bury, filtrate returns Aerobic Pond.The supernatant waste water of sedimentation tank send multi-layer biological filter tower to process.The filler of biological filtering tower combined working be activated carbon or Porous ceramic grain, is 0.5m～2.0m per thickness degree, and gross thickness is 2m～4m.During the dominant bacteria of biological filtering tower combined working is photosynthetic bacteria Rhodopseudomonas（Rhodopseudomonas）.The hydraulic load of biological filtering tower combined working is 40 m³/m².d～100m³/m².d.Biological filter The standard water discharge discharge of tower.

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 lime cream to carry out stripping deamination technique, the percolate contains more Ca²⁺, it and CO₂It is anti-in percolate CaCO should be generated₃.Before into iron-aluminum-manganese composite powder reduction reactor, CO is used₂Preneutralization precipitation is carried out, and carries out solid-liquor separation, Avoid solid matter and generate CaCO₃Impact to the reduction of iron-aluminum-manganese composite powder, is also beneficial to the complete iron-aluminum-manganese of unreacted and is combined Powder recycling.After the waste water isolated enters iron-aluminum-manganese composite powder reduction reactor, the larger molecular organicses in waste water are special It is not persistence organic pollutant（Containing phenyl ring and（Or）The Organic substance of heterocycle etc.）The strong of generation is reduced by iron-aluminum-manganese composite powder Reduce the effect of free radical and destroy, be that subsequent biochemical process creates favorable conditions.It is passed through pressure CO₂Purpose be maintain ferrum aluminum Manganese composite powder reduces suitable pH value（2.0～5.0）, the waste water lime cream or other alkaline matters after reduction adjust 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 work of microorganism With larger molecular organicses further become small organic molecule, are that more favorable condition is created in subsequent bio oxidation.By biological oxygen Change is processed, and remaining most of Organic substances are removed, while going to denitrogenate the pollutant such as phosphorus.Waste water finally enters activated carbon or porous Ceramic aggregate biological filter tower, in the presence of microorganism, particularly rhodopseudomonas, the pollution such as further organics removal and nitrogen phosphorus Thing, it is ensured that the waste water stably reaching standard discharge after process.

Relative to existing method, the outstanding advantages of the present invention are reduced using iron-aluminum-manganese composite powder, by percolate Persistence organic pollutant destruction, be that subsequent biological treatment creates favorable conditions, so as to ensure process after waste water stably reach Mark discharge；Relative to the metal deoxidization used in other wastewater treatments, using CO₂Now widely used sulphuric acid is replaced to make Acidulant, does not 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-Inhibitory action to microorganism during anaerobic and aerobic, greatly improves the efficiency of biological treatment；Refuse landfill is filled Containing abundant CO in waste gas₂Waste gas is available for utilizing, and can not only reduce processing cost, and can reduce carbon emission；After process Waste water energy stably reaching standard is discharged, 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, the reduction of iron-aluminum-manganese composite powder（1h、40℃、CO₂Pressure 0.8MPa, every liter of waste water Add iron-aluminum-manganese composite powder 30g）, anaerobism（PH8.5,96h, 25 DEG C～35 DEG C）, it is aerobic（10h）And 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 67mg/L, NH₃-N 5.9mg/L、T- P0.2mg/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, the reduction of iron-aluminum-manganese composite powder（2h、25℃、CO₂Pressure 0.3MPa, per liter give up Water adds iron-aluminum-manganese composite powder 10g）, anaerobism（PH7.0,24h, 35 DEG C～55 DEG C）, it is aerobic（6h）And biological filtering tower combined working（Activated carbon is filled out Bed of material gross thickness 2m, hydraulic load 50m³/m².d）The COD of water outlet after process_CrFor 49mg/L, NH₃-N 4.5mg/L、T- P0.2mg/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 ooze Filtrate uses CO₂PH value is neutralized less than 7, solid-liquor separation is carried out, the waste water isolated enters regulating reservoir, the solid isolated is returned Refuse landfill is filled, and the waste water after adjusted pond is adjusted sends into voltage-resistant reactor, and cleaning iron-aluminum-manganese composite powder is added reaction Device, and it is passed through industrial CO₂Reacted, the granularity of iron-aluminum-manganese composite powder is less than 180 mesh, every kind of metal in iron-aluminum-manganese composite powder Content is not less than 5%, and every liter of waste water adds iron-aluminum-manganese composite powder 10g～40g, and the stirring reaction time is 1h～3h, and reaction temperature is 25 DEG C～60 DEG C, CO₂Pressure be 0.3MPa～1.0MPa, reacted waste water carries out solid-liquor separation, the iron-aluminum-manganese isolated Composite powder Returning reactor, the waste water lime cream or other alkaline matters after solid-liquor separation adjust 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, after anaerobism Waste water into the process of biology aerobic pond room temperature, the Aerobic Process for Treatment time is 6h～16h, and waste water after Aerobic Process for Treatment enters precipitation Pond, sedimentation time are 1h～3h, irregularly extract sludge out from sedimentation tank and are filtered, and filter cake returns refuse landfill landfill, Filtrate returns Aerobic Pond, and the supernatant waste water of sedimentation tank send multi-layer biological filter tower to process, and the filler of biological filtering tower combined working is activated carbon or many Hole haydite, filler gross thickness are 2m～4m, and the dominant bacteria of biological filtering tower combined working is the rhodopseudomonas in photosynthetic bacteria, biological filtering tower combined working Hydraulic load be 40 m³/m².d～100m³/m².d, the standard water discharge discharge of biological filtering tower combined working.