CN106746287A - TNT produces the processing method of waste water - Google Patents

Abstract

The processing method of the TNT production generation waste water that the present invention is introduced includes acid waste water and alkaline waste water mixing, separation of solid and liquid, CO₂The operations such as the reduction of pressurization aluminium zinc composite powder, anaerobism, the treatment of aerobic and biological filtering tower combined working, the waste water after treatment can stably reaching standard discharge.

Description

TNT produces the processing method of waste water

Technical field

A kind of processing method of the waste water produced the present invention relates to TNT productions.

Background technology

TNT is a kind of explosive, is dual-use product.The organic waste water pollutant COD concentration that its production is produced is high, into Divide complexity, intractability is big.If the waste water is not processed is directly discharged into environment, severe contamination will be caused to environment.TNT productions are produced Two kinds of waste water, one kind is acid waste water, and another kind is alkaline waste water.The processing method of current acid waste water is mainly biological place Reason.Due to containing nitrobenzene compounds in waste water, the toxicity to microorganism is very big, influences biological treatment effect, and waste water is difficult to Stably reaching standard is discharged.The processing method of current alkaline waste water is mainly burning method, due to containing a large amount of nitrobenzenes in waste water Compound, produces a large amount of NO during burning_x, severe contamination atmospheric environment.Exploitation secondary pollution is small, the TNT lifes of energy stably reaching standard discharge The processing method for producing waste water has larger practical value.

The content of the invention

For the problem of current TNT production wastewater treatments method, the purpose of the present invention is that searching secondary pollution is small, can stablize The TNT of qualified discharge produces the processing method of waste water, it is characterised in that the acid waste water and alkaline waste water for producing TNT productions are mixed Close, mixed waste water enters sedimentation basin, and sedimentation basin has regulatory function concurrently.Sedimentation time is 1h~3h.Irregularly from sedimentation basin Middle extraction sludge is filtered.Filter cake makees dangerous disposition of solid waste.Filtrate returns to sedimentation basin.The supernatant waste water of sedimentation basin send Enter voltage-resistant reactor, cleaning aluminium zinc composite powder is added into reactor, and be passed through industrial CO₂Reacted, the grain of aluminium zinc composite powder Degree is less than 180 mesh, and the content of every kind of metal is not less than 5% in aluminium zinc composite powder（The aluminium zinc composite powder that return is used is not limited System）, every liter of waste water addition aluminium zinc composite powder 15g~40g, the stirring reaction time is 2h~4h, and reaction temperature is 25 DEG C~60 DEG C, CO₂Pressure be 0.3MPa~1.0MPa.Reacted waste water carries out solid-liquor separation, and the aluminium zinc composite powder isolated returns to reaction Device.Waste water milk of lime or other alkaline matters after solid-liquor separation adjust its pH value to 7.0~8.5, subsequently into sedimentation basin Precipitation 1h~3h, irregularly extracts sludge out from sedimentation basin and is filtered, and filter cake makees dangerous disposition of solid waste, and filtrate returns Sedimentation basin.The supernatant waste water of sedimentation basin send anaerobic reactor.Waste water stops 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.Aerobic Process for Treatment Waste water afterwards enters sedimentation basin and precipitates 1h~3h, irregularly extracts sludge out from sedimentation basin and is filtered, and filter cake makees dangerous solid Waste treatment, filtrate returns to Aerobic Pond.The supernatant waste water of sedimentation basin send multi-layer biological filter tower to process.The filler of biological filtering tower combined working is Activated carbon or porous ceramic grain, are 1.0m~2.0m per thickness degree, and gross thickness is 2m~6m.The dominant bacteria of biological filtering tower combined working is photosynthetic Red pseudomonas in bacterium（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 the acid waste water and alkaline waste water that TNT productions are produced mix, waste water meeting Generation acid precipitation reaction.The solid matter contained in itself in the sediment and waste water that are produced in order to avoid acid precipitation reaction is compound to aluminium zinc Powder reduction has a negative impact, and is also beneficial to unreacted aluminium zinc composite powder and recycles, therefore carries out separation of solid and liquid to it.It is useless After water enters aluminium zinc composite powder reduction reactor, the larger molecular organicses in waste water, particularly nitrobenzene matters pass through aluminium zinc Composite powder reduces the effect of the strong reduction free radical for producing and destroys, and substantially reduces toxicity of the waste water to microorganism, is follow-up life Change treatment creates favorable conditions.It is passed through pressure CO₂Purpose be to maintain aluminium zinc composite powder to reduce suitable pH value（2.0~5.0）, Waste water milk of lime or other alkaline matters after reduction adjust its pH value, to meet the requirement of follow-up anaerobic and aerobic process. Through the waste water of aforementioned processing in anaerobic processes, by the effect of microorganism, larger molecular organicses further become small molecule to be had Machine thing, is that more favorable condition is created in subsequent bio oxidation.Processed by biological oxidation, remaining most of organic matters are removed, The pollutant such as remove to denitrogenate simultaneously.Waste water finally enters activated carbon or porous ceramic grain biological filtering tower combined working, in microorganism, particularly red false list In the presence of born of the same parents bacterium, the pollutant such as further organics removal and nitrogen, it is ensured that the waste water stably reaching standard discharge after treatment.

Relative to existing method, the present invention is greatly reduced useless using aluminium zinc composite powder reduction destruction nitrobenzene matters Water greatly improves the biodegradability energy of waste water to the toxicity of microorganism；Relative to now widely used destruction nitrobenzene The method of material（Iron-carbon micro-electrolysis, metal powder reduction, Fenton methods etc.）, outstanding advantages of the invention are to use CO₂Instead of mesh Preceding widely used sulfuric acid makees acidulant, does not introduce SO₄ ^2-Ion, largely reducing generation H₂The material base of S（TNT productions are useless Water contains S）, so as to significantly reduce H₂The pollution of S, while also mitigating SO₄ ^2-Suppression to microorganism during anaerobic and aerobic Effect, greatly improves the efficiency of biological treatment, it is ensured that the waste water energy stably reaching standard discharge after treatment；Pot is all had in TNT factories Stove, the CO that fuel combustion is produced₂Waste gas can make full use of, and can not only reduce processing cost, and can reduce carbon emission, have Obvious economic benefit and environmental benefit.

Specific implementation method

Embodiment 1：1m is processed daily³TNT mixture manufacturing waste water（Composition： COD_Cr7100mg/L, nitrobenzene matters 835mg/ L、pH6.3）, reduced through separation of solid and liquid, aluminium zinc composite powder（2h、40℃、CO₂Pressure 0.6MPa, every liter of waste water add aluminium zinc to be combined Powder 30g）, anaerobism（PH8.5,96h, 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 90m³/m².d）The COD of water outlet after treatment_CrIt is 49mg/L, nitrobenzene 0.7mg/L, BOD₅8mg/L, pH7.0, color Degree 12.

Embodiment 2：5m is processed daily³Mixture manufacturing waste water（Composition： COD_Cr7100mg/L, nitrobenzene matters 835mg/L、pH6.3）, reduced through aluminium zinc composite powder（4h、25℃、CO₂Pressure 0.3MPa, every liter of waste water add aluminium zinc composite powder 15g）, 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, waterpower Load 40m³/m².d）The COD of water outlet after treatment_CrIt is 56mg/L, nitrobenzene 0.9mg/L, BOD₅10mg/L, pH6.9, colourity 14。

Claims (1)

1. a kind of TNT produces the processing method of the waste water for producing, it is characterised in that the acid waste water and alkalescence for producing TNT productions Waste water mixes, and mixed waste water enters sedimentation basin, and sedimentation basin has regulatory function concurrently, and the sedimentation time is 1h~3h, irregularly from Extract sludge in sedimentation basin out to be filtered, filter cake makees dangerous disposition of solid waste, filtrate returns to sedimentation basin, the supernatant of sedimentation basin Waste water sends into voltage-resistant reactor, cleaning aluminium zinc composite powder is added into reactor, and be passed through industrial CO₂Reacted, aluminium zinc is combined The granularity of powder is less than 180 mesh, and the content of every kind of metal is not less than 5% in aluminium zinc composite powder, and every liter of waste water adds aluminium zinc composite powder 15g~40g, the stirring reaction time be 2h~4h, reaction temperature be 25 DEG C~60 DEG C, CO₂Pressure be 0.3MPa~1.0MPa, Reacted waste water carries out solid-liquor separation, the aluminium zinc composite powder Returning reactor isolated, the waste water lime after solid-liquor separation Breast or other alkaline matters adjust its pH value to 7.0~8.5,1h~3h are precipitated subsequently into sedimentation basin, irregularly from sedimentation basin Middle extraction sludge is filtered, and filter cake makees dangerous disposition of solid waste, and filtrate returns to sedimentation basin, and the supernatant waste water of sedimentation basin send 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 the treatment of biology aerobic pond normal temperature, the Aerobic Process for Treatment time is 6h~16h, the waste water after Aerobic Process for Treatment enter sedimentation basin precipitation 1h~ 3h, irregularly extracts sludge out from sedimentation basin and is filtered, and filter cake makees dangerous disposition of solid waste, and filtrate returns to Aerobic 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 total thickness It is 2m~6m to spend, and the dominant bacteria of biological filtering tower combined working is the red pseudomonas in photosynthetic bacteria, and 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.