CN106673318A - TNT production wastewater treatment method - Google Patents

Abstract

The invention introduces a method for treating wastewater produced in the production of TNT. The method comprises the processes of mixing of acid wastewater and alkaline wastewater, separation of solid and liquid, CO2 pressurized reduction of an iron aluminum magnesium compound powder, anaerobic treatment, aerobic treatment, biological filtration tower treatment and the like, and the treated wastewater can be stably discharged to reach the standard.

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 is acid waste water, and another kind is alkaline waste water.At present the processing method of acid waste water is mainly at biology Reason.It is very big to the toxicity of microorganism due to containing nitrobenzene compounds in waste water, affect biological treatment effect, waste water to be difficult to Stably reaching standard is discharged.At present the processing method of 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, 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 tank, and sedimentation tank has regulatory function concurrently.Sedimentation time is 1h~3h.Irregularly from sedimentation tank Middle extraction sludge is filtered.Filter cake makees dangerous disposition of solid waste.Filtrate returns sedimentation tank.The supernatant waste water of sedimentation tank send Enter voltage-resistant reactor, cleaning iron-aluminum-manganese composite powder is added into reactor, and be passed through industrial CO₂Reacted, iron-aluminum-manganese composite powder Granularity be less than 180 mesh, the content of every kind of metal is not less than 5% in iron-aluminum-manganese composite powder（The iron-aluminum-manganese composite powder that return is used is not It is so limited）, every liter of waste water addition iron-aluminum-manganese 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 iron-aluminum-manganese isolated is answered Close powder Returning reactor.Waste water lime cream or other alkaline matters after solid-liquor separation adjusts its pH value to 7.0~8.5, so Sedimentation tank being entered afterwards and precipitating 1h~3h, irregularly extracted sludge out from sedimentation tank and filtered, filter cake makees dangerous solid waste Dispose, filtrate returns sedimentation tank.The supernatant waste water of sedimentation tank send anaerobic reactor.Waste water anaerobic reactor stop 24h~ 120h, anaerobism temperature is 25 DEG C~55 DEG C.Into the process of biology aerobic pond room temperature, the Aerobic Process for Treatment time is 6h to waste water after anaerobism ~16h.Waste water after Aerobic Process for Treatment enters sedimentation tank and precipitates 1h~3h, irregularly extracts sludge out from sedimentation tank and is filtered, 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.It is raw The filler of thing filter tower is activated carbon or porous ceramic grain, is 1.0m~2.0m per thickness degree, and gross thickness is 2m~6m.Biological filtering tower combined working Dominant bacteria 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, after the acid waste water and alkaline waste water that TNT productions are produced mixes, waste water meeting Generation acid precipitation reaction.The precipitate produced in order to avoid acid precipitation reaction and the solid matter contained in itself in waste water are multiple to iron-aluminum-manganese Close powder reduction to have a negative impact, be also beneficial to unreacted iron-aluminum-manganese composite powder and recycle, therefore solid-liquid point is carried out to it From.Waste water is entered after iron-aluminum-manganese composite powder reduction reactor, and the larger molecular organicses in waste water, particularly nitrobenzene matters lead to Cross the effect of the strong reduction free radical that the reduction of iron-aluminum-manganese composite powder is produced and destroy, substantially reduce toxicity of the waste water to microorganism, Create favorable conditions for subsequent biochemical process.It is passed through pressure CO₂Purpose be to maintain iron-aluminum-manganese composite powder to reduce suitable pH value （2.0~5.0）, the waste water lime cream or other alkaline matters after reduction adjusts its pH value, to meet follow-up anaerobic and aerobic The requirement of process.In anaerobic processes, by the effect of microorganism, larger molecular organicses further become the premenstrual waste water for stating process It is that more favorable condition is created in subsequent bio oxidation into small organic molecule.It is remaining most of organic by biological oxidation process Thing is removed, while the pollutant such as removing to denitrogenate.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 in the presence of rhodopseudomonas, it is ensured that the waste water stably reaching standard after process Discharge.

Relative to existing method, the present invention is greatly reduced using iron-aluminum-manganese composite powder reduction destruction nitrobenzene matters Toxicity of the waste water to microorganism, and greatly improve the biodegradability energy of waste water；Relative to now widely used destruction Nitrobenzol The method of class material（Iron-carbon micro-electrolysis, metal powder reduction, Fenton methods etc.）, the outstanding advantages of the present invention are to adopt CO₂Replace Now widely used sulphuric acid makees acidulant, does not introduce SO₄ ^2-Ion, largely reducing generation H₂The material base of S（TNT is produced Waste water contains S）, so as to significantly reduce H₂The pollution of S, while also mitigating SO₄ ^2-Suppression to microorganism during anaerobic and aerobic Make and use, greatly improve the efficiency of biological treatment, it is ensured that the waste water energy stably reaching standard discharge after process；TNT factories all have Boiler, 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, tool There are 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 solid-liquid separation, the reduction of iron-aluminum-manganese composite powder（2h、40℃、CO₂Pressure 0.6MPa, every liter of waste water add iron-aluminum-manganese Composite 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 total thickness Degree 4m, hydraulic load 90m³/m².d）The COD of water outlet after process_CrFor 64mg/L, nitrobenzene 1.3mg/L, BOD₅13mg/L、 PH7.0, colourity 19.

Embodiment 2：5m is processed daily³Mixture manufacturing waste water（Composition： COD_Cr7100mg/L, nitrobenzene matters 835mg/L、pH6.3）, the reduction of Jing iron-aluminum-manganeses composite powder（4h、25℃、CO₂Pressure 0.3MPa, every liter of waste water add iron-aluminum-manganese to answer Close 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, Hydraulic load 40m³/m².d）The COD of water outlet after process_CrFor 72mg/L, nitrobenzene 1.9mg/L, BOD₅16mg/L, pH6.9, color Degree 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 alkalescence for producing Waste water mixes, and mixed waste water enters sedimentation tank, and sedimentation tank has regulatory function concurrently, and the sedimentation time is 1h~3h, irregularly from Extract sludge in sedimentation tank out to be filtered, filter cake makees dangerous disposition of solid waste, filtrate returns sedimentation tank, the supernatant of sedimentation tank Waste water sends into voltage-resistant reactor, and cleaning iron-aluminum-manganese composite powder is added into reactor, and is passed through industrial CO₂Reacted, iron-aluminum-manganese The granularity of composite powder is less than 180 mesh, and the content of every kind of metal is not less than 5% in iron-aluminum-manganese composite powder, and every liter of waste water adds iron-aluminum-manganese 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, the iron-aluminum-manganese composite powder Returning reactor isolated, useless after solid-liquor separation Water lime cream or other alkaline matters adjust its pH value to 7.0~8.5, precipitate 1h~3h subsequently into sedimentation tank, irregularly Extract sludge out from sedimentation tank to be filtered, filter cake makees dangerous disposition of solid waste, filtrate returns sedimentation tank, sedimentation tank it is upper Stripping water send anaerobic reactor, waste water to stop 24h~120h in anaerobic reactor, and anaerobism temperature is 25 DEG C~55 DEG C, after anaerobism Waste water into the process of biology aerobic pond room temperature, the Aerobic Process for Treatment time is 6h~16h, and the waste water after Aerobic Process for Treatment enters sedimentation tank Precipitation 1h~3h, irregularly extracts sludge out from sedimentation tank 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, and the filler of biological filtering tower combined working is activated carbon or porous ceramic grain, is filled out Material gross thickness is 2m~6m, and the dominant bacteria of biological filtering tower combined working is the rhodopseudomonas in photosynthetic bacteria, and the waterpower of biological filtering tower combined working is born Lotus is 30 m³/m².d~90m³/m².d, the standard water discharge discharge or reuse of biological filtering tower combined working.