CN106673316A - Treatment method for chemical organic wastewater - Google Patents

Abstract

The invention relates to a treatment method for chemical organic wastewater. The method comprises the following processes: pressurizing with CO2 and reducing with ferric manganese composite powder under an ultrasonic effect, and then performing anaerobic treatment, aerobic treatment and biologic filtering tower treatment. The treated wastewater can be stably discharged after reaching the 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 substance 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.At present containing persistence organic pollutant 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 carries out a biological disposal upon.In advanced oxidation preprocessing process, sulphuric 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, affects biological treatment effect, waste water to be difficult to stably reaching standard discharge.Exploitation secondary pollution is little, 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 little, can be steady Determine the processing method of the chemical industrial organic wastewater of qualified discharge, it is characterised in that pH value is more than into 5.0, and after adjusted pond is adjusted Chemical industrial organic wastewater containing persistence organic pollutant sends into voltage-resistant reactor, and cleaning ferrimanganic composite powder is added into reactor, and It is passed through industrial CO₂Reacted.The granularity of ferrimanganic composite powder is less than 180 mesh, and the content of every kind of metal is not low in ferrimanganic composite powder In 5%（The ferrimanganic composite powder that return is used is not limited）, every liter of waste water addition ferrimanganic composite powder 5g~30g.Make in ultrasound wave With under, the mechanic whirl-nett reaction time is 10min~40min, and reaction temperature is 25 DEG C~60 DEG C, CO₂Pressure be 0.1MPa~ 1.0MPa, the power of every cubic metre of waste water input ultrasound wave is 2kW~8kW.Reacted waste water carries out solid-liquor separation, isolates Ferrimanganic composite powder Returning reactor.Waste water lime cream or other alkaline matters after solid-liquor separation adjusts its pH value to 6.8 ~8.5,1h~3h is precipitated subsequently into sedimentation tank, irregularly to extract sludge out from sedimentation tank and filtered, filter cake is made dangerous solid Body waste treatment, filtrate returns sedimentation tank.The supernatant waste water of sedimentation tank 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 room temperature, during Aerobic Process for Treatment Between be 6h~16h.Waste water after Aerobic Process for Treatment enters sedimentation tank, irregularly extracts sludge out from sedimentation tank and is filtered, filter cake Make dangerous disposition of solid waste, filtrate returns Aerobic Pond.The supernatant waste water of sedimentation tank send multi-layer biological filter tower to process.Biological filter The filler of tower is activated carbon or porous ceramic grain, is 1.0m~2.0m per thickness degree, and gross thickness is 2m~6m.The advantage of biological filtering tower combined working Strain is the rhodopseudomonas 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 of biological filtering tower combined working or reuse.

The object of the present invention is achieved like this, and chemical industrial organic wastewater is entered after ferrimanganic composite powder reduction reactor, waste water In larger molecular organicses, particularly persistence organic pollutant（Containing phenyl ring and（Or）The Organic substance of heterocycle etc.）It is multiple by ferrimanganic Close the effect of the strong reduction free radical that powder reduction is produced and destroy, be that subsequent biochemical process creates favorable conditions.It is passed through pressure CO₂ Purpose be to maintain ferrimanganic composite powder to reduce suitable pH value（2.0~5.0）, the effect for being input into ultrasound wave is to accelerate reaction Mass transport process.Waste water lime cream or other alkaline matters after reduction adjusts its pH value, to meet follow-up anaerobic and aerobic mistake The requirement of journey.In anaerobic processes, by the effect of microorganism, larger molecular organicses further become the premenstrual waste water for stating process Small organic molecule, is that more favorable condition is created in subsequent bio oxidation.By biological oxidation process, remaining most of Organic substances It is removed, while going to denitrogenate the pollutant such as phosphorus.Waste water finally enters activated carbon or porous ceramic grain biological filtering tower combined working, special in microorganism It is not the pollutant such as further organics removal and nitrogen phosphorus, it is ensured that the waste water after process stably reaches in the presence of rhodopseudomonas Mark discharge.

Relative to existing method（Iron-carbon micro-electrolysis, metal powder reduction, Fenton methods etc.）, the outstanding advantages of the present invention are to adopt Use CO₂Replace now widely used sulphuric acid to make acidulant, 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 after process stably 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）, the reduction of Jing ferrimanganics composite powder（30min、25℃、CO₂Pressure 0.6MPa, every cubic metre of waste water input Ultrasonic power 2kW, every liter of waste water add ferrimanganic 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 process_CrFor 75mg/L, T-N16.9mg/L, T-P0.2mg/L, colourity 17.

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）, the reduction of Jing ferrimanganics composite powder（10min、40℃、CO₂Pressure 0.1MPa, per cubic metre Waste water input ultrasonic power 4kW, every liter of waste water add ferrimanganic 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 process_CrFor 68mg/L, T-N14.2mg/L, T-P0.2mg/L, colourity 15.

Claims (1)

1. a kind of processing method of chemical industrial organic wastewater, it is characterised in that pH value is more than into 5.0, and containing after adjusted pond is adjusted The chemical industrial organic wastewater of persistence organic pollutant sends into voltage-resistant reactor, and cleaning ferrimanganic composite powder is added into reactor, and leads to Enter industrial CO₂Reacted, the granularity of ferrimanganic composite powder is less than 180 mesh, and the content of every kind of metal is not less than in ferrimanganic composite powder 5%, every liter of waste water adds ferrimanganic composite powder 5g~30g, under ul-trasonic irradiation, the mechanic whirl-nett reaction time be 10min~ 40min, reaction temperature is 25 DEG C~60 DEG C, CO₂Pressure be 0.1MPa~1.0MPa, every cubic metre of waste water input ultrasound wave Power is 2kW~8kW, and reacted waste water carries out solid-liquor separation, the ferrimanganic composite powder Returning reactor isolated, solid-liquor separation Waste water lime cream or other alkaline matters afterwards adjusts its pH value to 6.8~8.5, and subsequently into sedimentation tank 1h~3h is precipitated, Irregularly extract sludge out from sedimentation tank to be filtered, filter cake makees dangerous disposition of solid waste, filtrate returns sedimentation tank, 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, Waste water after anaerobism is 6h~16h into the process of biology aerobic pond room temperature, Aerobic Process for Treatment time, and the waste water after Aerobic Process for Treatment is entered Sedimentation tank precipitates 1h~3h, irregularly extracts sludge out from sedimentation tank and is filtered, and filter cake makees dangerous disposition of solid waste, filter Liquid returns Aerobic Pond, and the supernatant waste water in sedimentation tank 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 rhodopseudomonas 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.