CN106517679A - Method for treating TNT production waste water - Google Patents

Abstract

The invention relates to a method for treating TNT production waste water. The method comprises the following steps: mixing acidic waste water with alkaline waste water; carrying out solid-liquid separation; pressurizing with CO2 and reducing iron-manganese compound powder; carrying out anaerobic treatment; carrying out aerobiotic treatment; treating with a biofilter and the like. The treated waste water can reach the standard stably and can be discharged.

Description

TNT produces the processing method of waste water

Technical field

The present invention relates to a kind of processing method of the waste water of TNT production generations.

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 are acid waste water, and another kind is alkaline waste water.The processing method of acid waste water is mainly at biology at present Reason.It is due to containing nitrobenzene compounds in waste water, very big to the toxicity of microorganism, affect biological treatment effect, waste water to be difficult to Stably reaching standard is discharged.The processing method of alkaline waste water is mainly burning method at present, due to containing a large amount of nitrobenzenes in waste water Compound, produces a large amount of NO during burning_x, major polluting atmosphere environment.Exploitation secondary pollution is little, 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 little, can stablize The TNT of qualified discharge produces the processing method of waste water, it is characterised in that mix acid waste water and alkaline waste water that TNT produces generation 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 sedimentation basin.The supernatant waste water of sedimentation basin send Enter voltage-resistant reactor, cleaning ferrimanganic composite powder is added into reactor, and is passed through industrial CO₂Reacted, the grain of ferrimanganic composite powder Less than 180 mesh, in ferrimanganic composite powder, the content of every kind of metal is not less than 5% to degree（The ferrimanganic composite powder that return is used is not limited System）, every liter of waste water addition ferrimanganic composite powder 15g～40g, stirring reaction time are 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 ferrimanganic composite powder isolated returns reaction Device.Waste water milk of lime or other alkaline matters after solid-liquor separation adjusts its pH value to 7.0～8.5, subsequently into sedimentation basin Precipitation 1h～3h, irregularly from sedimentation basin extracts sludge out 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 process 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 return 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 of biological filtering tower combined working or reuse.

The object of the present invention is achieved like this, after the acid waste water and alkaline waste water that TNT productions are produced mixes, waste water meeting Generation acid precipitation reaction.The sediment produced in order to avoid acid precipitation reaction and the solid matter for containing in waste water in itself are compound to ferrimanganic Powder reduction has a negative impact, and is also beneficial to unreacted ferrimanganic composite powder and recycles, therefore carries out separation of solid and liquid to which.It is useless After water enters ferrimanganic composite powder reduction reactor, the larger molecular organicses in waste water, particularly nitrobenzene matters pass through ferrimanganic 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 is processed and is created favorable conditions.It is passed through pressure CO₂Purpose be to maintain ferrimanganic composite powder to reduce suitable pH value（2.0～5.0）, Waste water milk of lime or other alkaline matters after reduction adjusts its pH value, to meet the requirement of follow-up anaerobic and aerobic process. In anaerobic processes, by the effect of microorganism, larger molecular organicses further become small molecule to be had the premenstrual waste water for stating process Machine thing, is that more favorable condition is created in subsequent bio oxidation.By biological oxidation process, remaining most of organic matters are removed, The pollutant such as simultaneously remove to denitrogenate.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 process.

Relative to existing method, the present invention is greatly reduced useless using ferrimanganic composite powder reduction destruction nitrobenzene matters Toxicity of the water to microorganism, and greatly improve the biodegradability energy of waste water；Relative to now widely used destruction nitrobenzene The method of material（Iron-carbon micro-electrolysis, metal powder reduction, Fenton methods etc.）, the outstanding advantages of the present invention are to adopt CO₂Replace mesh Front 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 process；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）, Jing separation of solid and liquid, the reduction of ferrimanganic composite powder（2h、40℃、CO₂Pressure 0.6MPa, every liter of waste water add ferrimanganic 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 process_CrFor 76mg/L, nitrobenzene 1.3mg/L, BOD₅12mg/L, pH7.0, color Degree 21.

Embodiment 2：5m is processed daily³Mixture manufacturing waste water（Composition： COD_Cr7100mg/L, nitrobenzene matters 835mg/L、pH6.3）, the reduction of Jing ferrimanganics composite powder（4h、25℃、CO₂Pressure 0.3MPa, every liter of waste water add ferrimanganic 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 process_CrFor 83mg/L, nitrobenzene 1.6mg/L, BOD₅15mg/L, pH6.9, colourity 24。

Claims (1)

1. a kind of TNT produces the processing method of the waste water for producing, it is characterised in that TNT is produced the acid waste water and alkali for producing Property waste water mixing, mixed waste water enters sedimentation basin, and sedimentation basin has regulatory function concurrently, and the sedimentation time is 1h～3h, irregularly Extract sludge from sedimentation basin out to be filtered, filter cake makees dangerous disposition of solid waste, filtrate returns sedimentation basin, sedimentation basin it is upper Stripping water sends into voltage-resistant reactor, cleaning ferrimanganic composite powder is added reactor, and is passed through industrial CO₂Reacted, ferrimanganic is multiple The granularity for closing powder is less than 180 mesh, and in ferrimanganic composite powder, the content of every kind of metal is not less than 5%, and every liter of waste water adds ferrimanganic composite powder 15g～40g, stirring reaction time are 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, the ferrimanganic 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, precipitate 1h～3h 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 sedimentation basin, and the supernatant waste water of sedimentation basin send Anaerobic reactor, waste water stop 24h～120h in anaerobic reactor, and anaerobism temperature is 25 DEG C～55 DEG C, and the waste water after anaerobism enters Enter biology aerobic pond normal temperature to process, the Aerobic Process for Treatment time is 6h～16h, the waste water after Aerobic Process for Treatment enter sedimentation basin precipitation 1h～ 3h, irregularly from sedimentation basin 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 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 Spend for 2m～6m, 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.