CN106673333A - Treatment method of chemical industrial organic wastewater - Google Patents

Abstract

The invention relates to a treatment method of chemical industrial organic wastewater. The treatment method comprises the processes of pressurizing through CO2, and enabling manganese zinc composite powder to be subjected to reduction under ultrasonication, carrying out an anaerobic process, carrying out an aerobiotic process, processing through a biological filtration tower, and the like, so that the treated wastewater can be stably discharged to reach standard.

Description

The processing method of chemical industrial organic wastewater

Technical field

The present invention relates to a kind of processing method of chemical industrial organic wastewater.

Background technology

Organic chemical industry is one of mainstay of the national economy industry, the organic waste water pollutant COD concentration that its production is produced Height, complicated component particularly contains persistence organic pollutant（Containing phenyl ring and（Or）The organic matter of heterocycle etc.）When, intractability Greatly.If the waste water is not processed is directly discharged into environment, severe contamination will be caused to environment.Contain persistence organic pollutant at present The processing method of chemical industrial organic wastewater mainly first carries out advanced oxidation（Such as iron-carbon micro-electrolysis, metal powder reduction, Fenton methods Deng）Pretreatment, then biological treatment.In advanced oxidation preprocessing process, sulfuric acid is generally needed to be added, caused at subsequent bio Reason（Such as anaerobism, hydrolysis acidification）During produce H₂S, produces more serious secondary pollution；Simultaneously because SO₄ ^2-To microorganism Growth has obvious inhibitory action, influences biological treatment effect, and waste water is difficult to stably reaching standard discharge.Exploitation secondary pollution is small, energy The processing method of the chemical industrial organic wastewater of stably reaching standard discharge has larger practical value.

The content of the invention

For the problem of current chemical industrial organic wastewater processing method, the purpose of the present invention be find secondary pollution it is small, can be steady Determine the processing method of the chemical industrial organic wastewater of qualified discharge, it is characterised in that after pH value is more than into 5.0, and the regulation of adjusted pond Chemical industrial organic wastewater feeding voltage-resistant reactor containing persistence organic pollutant, reactor is added by cleaning MnZn composite powder, and It is passed through industrial CO₂Reacted.The granularity of MnZn composite powder is less than 180 mesh, and the content of every kind of metal is not low in MnZn composite powder In 5%（The MnZn composite powder that return is used is not limited）, every liter of waste water addition MnZn composite powder 5g~30g.Make in ultrasonic wave Under, the mechanic whirl-nett reaction time be 10min~40min, reaction temperature be 25 DEG C~60 DEG C, CO₂Pressure for 0.1MPa~ 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, isolates MnZn composite powder Returning reactor.Waste water milk of lime or other alkaline matters after solid-liquor separation adjust its pH value to 6.8 ~8.5,1h~3h is precipitated subsequently into sedimentation basin, irregularly to extract sludge out from sedimentation basin and filtered, filter cake is made dangerous solid Body waste treatment, filtrate returns to sedimentation basin.The supernatant waste water of sedimentation basin send 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 precipitates 1h~3h, and irregularly extracting sludge out from sedimentation basin is carried out Filtering, filter cake makees dangerous disposition of solid waste, and filtrate returns to Aerobic Pond.The supernatant waste water of sedimentation basin is sent at multi-layer biological filter tower Reason.The filler of biological filtering tower combined working is activated carbon or porous ceramic grain, is 1.0m~2.0m per thickness degree, and gross thickness is 2m~6m.It is biological The dominant bacteria of filter tower is the red pseudomonas in photosynthetic bacteria（Rhodopseudomonas）.The hydraulic load of biological filtering tower combined working is 30 m³/m².d~90m³/m².d.The standard water discharge discharge or reuse of biological filtering tower combined working.

The object of the present invention is achieved like this, after chemical industrial organic wastewater enters MnZn composite powder reduction reactor, waste water In larger molecular organicses, particularly persistence organic pollutant（Containing phenyl ring and（Or）The organic matter of heterocycle etc.）It is multiple by MnZn Close the effect of the strong reduction free radical that powder reduction is produced and destroy, be that subsequent biochemical treatment creates favorable conditions.It is passed through pressure CO₂ Purpose be to maintain MnZn composite powder to reduce suitable pH value（2.0~5.0）, the effect for being input into ultrasonic wave is the biography for accelerating reaction Matter process.Waste water milk of lime or other alkaline matters after reduction adjust its pH value, to meet follow-up anaerobic and aerobic process Requirement.Through the waste water of aforementioned processing in anaerobic processes, by the effect of microorganism, larger molecular organicses further become small Molecular organic, is that more favorable condition is created in subsequent bio oxidation.Processed by biological oxidation, remaining most of organic matter quilts Removal, while going to denitrogenate the pollutants such as phosphorus.Waste water finally enters activated carbon or porous ceramic grain biological filtering tower combined working, in microorganism, especially In the presence of being red pseudomonas, the pollutant such as further organics removal and nitrogen phosphorus, it is ensured that the waste water stably reaching standard after treatment Discharge.

Relative to existing method（Iron-carbon micro-electrolysis, metal powder reduction, Fenton methods etc.）, outstanding advantages of the invention are to adopt Use CO₂Make acidulant instead of now widely used sulfuric acid, do not introduce SO₄ ^2-Ion, essentially eliminates generation H₂The material base of S （Part chemical industrial organic wastewater contains S）, so as to significantly reduce H₂The pollution of S, while it also avoid SO₄ ^2-To anaerobic and aerobic mistake The inhibitory action of microorganism in journey, greatly improves the efficiency of biological treatment；Chemical plant all has boiler, what fuel combustion was produced CO₂Waste gas can make full use of, and can not only reduce processing cost, and can reduce carbon emission；Waste water energy stabilization after treatment reaches Mark discharge, with obvious economic benefit and environmental benefit.

Specific implementation method

Embodiment 1：1m is processed daily³Chemical industrial organic wastewater（Composition：pH6.7、COD_Cr11400mg/L、T-N52.5 mg/L、T- P35.1mg/L, colourity 250）, reduced through MnZn composite powder（30min、25℃、CO₂Pressure 0.6MPa, every cubic metre of waste water input Ultrasonic power 2kW, every liter of waste water add MnZn composite powder 25g）, anaerobism（PH8.5,72h, 25 DEG C~35 DEG C）, it is aerobic（12h） And biological filtering tower combined working（Porous ceramic grain packing layer gross thickness 4m, hydraulic load 35m³/m².d）The COD of water outlet after treatment_CrFor 55mg/L, T-N15.7mg/L, T-P0.5mg/L, colourity 19.

Embodiment 2：5m is processed daily³Synthesis pharmaceutical organic wastewater（Composition：pH5.7、COD_Cr6500 mg/L、T-N31.3 Mg/L, T-P23.2mg/L, colourity 300）, reduced through MnZn composite powder（10min、40℃、CO₂Pressure 0.1MPa, every cubic metre Waste water input ultrasonic power 4kW, every liter of waste water add MnZn composite powder 5g）, anaerobism（PH6.8,24h, 35 DEG C~55 DEG C）, it is good Oxygen（6h）And biological filtering tower combined working（Active carbon filler layer gross thickness 2m, hydraulic load 90m³/m².d）The COD of water outlet after treatment_CrFor 43mg/L, T-N12.2mg/L, T-P0.5mg/L, colourity 16.

Claims (1)

1. a kind of processing method of chemical industrial organic wastewater, it is characterised in that pH value is more than containing behind 5.0, and the regulation of adjusted pond The chemical industrial organic wastewater feeding voltage-resistant reactor of persistence organic pollutant, adds reactor, and lead to by cleaning MnZn composite powder Enter industrial CO₂Reacted, the granularity of MnZn composite powder is less than 180 mesh, and the content of every kind of metal is not less than in MnZn composite powder 5%, every liter of waste water adds MnZn composite powder 5g~30g, under ul-trasonic irradiation, the mechanic whirl-nett reaction time be 10min~ 40min, reaction temperature be 25 DEG C~60 DEG C, CO₂Pressure be 0.1MPa~1.0MPa, every cubic metre of waste water input ultrasonic wave Power is 2kW~8kW, and reacted waste water carries out solid-liquor separation, the MnZn composite powder Returning reactor isolated, solid-liquor separation Waste water milk of lime or other alkaline matters afterwards adjusts its pH value to 6.8~8.5, and 1h~3h is precipitated subsequently into sedimentation basin, Irregularly extract sludge out from sedimentation basin to be filtered, filter cake makees dangerous disposition of solid waste, filtrate returns to sedimentation basin, precipitation The supernatant waste water in pond send anaerobic reactor, waste water to stop 24h~120h in anaerobic reactor, and anaerobism temperature is 25 DEG C~55 DEG C, Into the treatment of biology aerobic pond normal temperature, the Aerobic Process for Treatment time is 6h~16h to waste water after anaerobism, and the waste water after Aerobic Process for Treatment enters Sedimentation basin precipitates 1h~3h, irregularly extracts sludge out from sedimentation basin and is filtered, and filter cake makees dangerous disposition of solid waste, filter Liquid returns to Aerobic Pond, and the supernatant waste water in sedimentation basin pond 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 is 2m~6m, and the dominant bacteria of biological filtering tower combined working is the red pseudomonas in photosynthetic bacteria, biological filtering tower combined working Hydraulic load be 30 m³/m².d~90m³/m².d, the standard water discharge discharge or reuse of biological filtering tower combined working.