CN106587510A - Method for treating chemical organic wastewater - Google Patents

Abstract

The invention discloses a method for treating chemical organic wastewater. The method for treating the chemical organic wastewater includes the steps of CO2-pressurizing manganese-aluminum-zinc-composite-powder reduction, anaerobic and aerobiotic treatment, biological filtering tower treatment and the like; the treated wastewater can be stably discharged in a standard-meeting mode.

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 contain 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 manganese aluminum zinc composite powder is added reactor, And it is passed through industrial CO₂Reacted.The granularity of manganese aluminum zinc composite powder is less than 180 mesh, each metal in manganese aluminum zinc composite powder Content is not less than 5%（The manganese aluminum zinc composite powder that return is used is not limited）.Every liter of waste water add manganese aluminum zinc composite powder 5g～ 30g, stirring reaction time are 1h～3h, and reaction temperature is 25 DEG C～60 DEG C, CO₂Pressure be 0.1MPa～1.0MPa.Reaction Waste water afterwards carries out solid-liquor separation, the manganese aluminum zinc composite powder Returning reactor isolated.Waste water lime cream after solid-liquor separation Or other alkaline matters adjust its pH value to 6.8～8.5, precipitate 1h～3h subsequently into sedimentation tank, irregularly from sedimentation tank Extract sludge out to be filtered, filter cake makees dangerous disposition of solid waste, filtrate returns sedimentation tank.The supernatant waste water of sedimentation tank send to be detested Oxygen reactor.Waste water stops 24h～120h in anaerobic reactor, and anaerobism temperature is 25 DEG C～55 DEG C.Waste water after anaerobism is entered Biology aerobic pond room temperature is processed, and the Aerobic Process for Treatment time is 6h～16h.Waste water after Aerobic Process for Treatment enter sedimentation tank precipitation 1h～ 3h, irregularly from sedimentation tank extracts sludge out and is filtered, and filter cake makees dangerous disposition of solid waste, and 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 is activated carbon or porous ceramic grain, per thickness degree For 1.0m～2.0m, gross thickness is 2m～6m.The dominant bacteria of biological filtering tower combined working 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 water outlet of biological filtering tower combined working reaches Mark discharge or reuse.

The object of the present invention is achieved like this, after chemical industrial organic wastewater enters manganese aluminum zinc composite powder reduction reactor, gives up Larger molecular organicses in water, particularly persistence organic pollutant（Containing phenyl ring and（Or）The Organic substance of heterocycle etc.）By manganese aluminum Zinc composite powder reduces the effect of the strong reduction free radical for producing and destroys, and is that subsequent biochemical process creates favorable conditions.It is passed through pressure Power CO₂Purpose be to maintain manganese aluminum zinc composite powder to reduce suitable pH value（3.0～5.0）, waste water lime cream after reduction or Other alkaline matters adjust its pH value, to meet the requirement of follow-up anaerobic and aerobic process.The premenstrual waste water for stating process is in anaerobism During, by the effect of microorganism, larger molecular organicses further become small organic molecule, are that subsequent bio oxidation is created More favorable condition.By biological oxidation process, remaining most of Organic substances are removed, while going to denitrogenate the pollutant such as phosphorus.It is useless Water finally enters activated carbon or porous ceramic grain biological filtering tower combined working, in the presence of microorganism, particularly rhodopseudomonas, further goes Except the pollutant such as Organic substance and nitrogen phosphorus, it is ensured that the waste water stably reaching standard discharge after process.

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 manganese aluminum zinc composite powder（1h、40℃、CO₂Pressure 0.6MPa, every liter of waste water add manganese aluminum Zinc 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 is total Thickness 4m, hydraulic load 35m³/m².d）The COD of water outlet after process_CrFor 52mg/L, T-N13.1mg/L, T-P0.3mg/L, colourity 15。

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 manganese aluminum zinc composite powder（3h、25℃、CO₂Pressure 0.1MPa, every liter of waste water add Enter manganese aluminum zinc composite powder 5g）, anaerobism（PH6.8,24h, 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 90m³/m².d）The COD of water outlet after process_CrFor 41mg/L, T-N12.3mg/L, T-P0.3mg/L, color Degree 17.

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 after adjusted pond is adjusted Chemical industrial organic wastewater containing persistence organic pollutant sends into voltage-resistant reactor, and cleaning manganese aluminum zinc composite powder is added reactor, And it is passed through industrial CO₂Reacted, the granularity of manganese aluminum zinc composite powder is less than 180 mesh, each metal in manganese aluminum zinc composite powder Content is not less than 5%, and every liter of waste water adds manganese aluminum zinc composite powder 5g～30g, and the stirring reaction time is 1h～3h, and reaction temperature is 25 DEG C～60 DEG C, CO₂Pressure be 0.1MPa～1.0MPa, reacted waste water carries out solid-liquor separation, the manganese aluminum zinc isolated Composite powder Returning reactor, the waste water lime cream or other alkaline matters after solid-liquor separation adjust its pH value to 6.8～8.5, 1h～3h being precipitated subsequently into sedimentation tank, irregularly sludge being extracted out from sedimentation tank and is filtered, filter cake makees dangerous solid waste Thing is disposed, and filtrate returns sedimentation tank, and the supernatant waste water of sedimentation tank send anaerobic reactor, waste water anaerobic reactor stop 24h～ 120h, anaerobism temperature are 25 DEG C～55 DEG C, and into the process of biology aerobic pond room temperature, the Aerobic Process for Treatment time is 6h to the waste water after anaerobism ～16h, the waste water after Aerobic Process for Treatment enter sedimentation tank and precipitate 1h～3h, irregularly extract sludge out from sedimentation tank and are filtered, Filter cake makees dangerous disposition of solid waste, and filtrate returns Aerobic Pond, and the supernatant waste water of sedimentation tank send multi-layer biological filter tower to process, raw The filler of thing filter tower is activated carbon or porous ceramic grain, and filler gross thickness is 2m～6m, and the dominant bacteria of biological filtering tower combined working is photosynthetic thin Rhodopseudomonas in bacterium, the hydraulic load of biological filtering tower combined working is 30 m³/m².d～90m³/m².d, the standard water discharge of biological filtering tower combined working Discharge or reuse.