CN106517691A - Coal tar wastewater treatment method - Google Patents

Coal tar wastewater treatment method Download PDF

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Publication number
CN106517691A
CN106517691A CN201611259336.5A CN201611259336A CN106517691A CN 106517691 A CN106517691 A CN 106517691A CN 201611259336 A CN201611259336 A CN 201611259336A CN 106517691 A CN106517691 A CN 106517691A
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CN
China
Prior art keywords
waste water
sedimentation tank
coal tar
tower
combined working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201611259336.5A
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Chinese (zh)
Inventor
龙炳清
李燕
苏光麒
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Sichuan Normal University
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Sichuan Normal University
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Priority to CN201611259336.5A priority Critical patent/CN106517691A/en
Publication of CN106517691A publication Critical patent/CN106517691A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
    • C02F2003/003—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms using activated carbon or the like
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/03—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/02—Odour removal or prevention of malodour
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The invention discloses a coal tar wastewater treatment method. The coal tar wastewater treatment method comprises the processes of CO2 pressurization, iron-carbon micro-electrolysis, anaerobic, aerobic and biological filter-tower treatment and the like, and stable and up-to-standard discharge of wastewater obtained after treatment can be achieved.

Description

The processing method of Coal Tar Wastewater
Technical field
The present invention relates to a kind of processing method of the waste water of coal tar processing and storage process generation.
Background technology
Coal tar is one of important source material of production of chemicals, the Pollutants in Wastewater that its processing and storage process are produced COD concentration is high, complicated component, and toxicity is big, and contains a large amount of persistence organic pollutants（Containing phenyl ring and（Or）Heterocycle etc. it is organic Thing）, intractability is big.If the waste water is not processed is directly discharged into environment, severe contamination will be caused to environment.Current Coal Tar Wastewater Processing method mainly have burning method and biological treatment.Burning method processing cost is high, and produces atmospheric pollution.Biological treatment Method needs first to carry out advanced oxidation（Such as iron-carbon micro-electrolysis, metal powder reduction, Fenton methods etc.）Pretreatment, then carries out a biological disposal upon. In advanced oxidation preprocessing process, need to add sulphuric acid, cause subsequent biological treatment（Such as anaerobism, hydrolysis acidification）During produce Raw H2S, produces more serious secondary pollution；Simultaneously because SO4 2-Growth to microorganism has obvious inhibitory action, affects life Thing treatment effect, waste water are difficult to stably reaching standard discharge.Exploitation secondary pollution is little, processing cost is low, the coal of energy stably reaching standard discharge The processing method of tar and waste water has larger practical value.
The content of the invention
For the problem of current Coal Tar Wastewater processing method, the purpose of the present invention is that searching secondary pollution is little, can stablize The processing method of the Coal Tar Wastewater of qualified discharge, it is characterised in that the Coal Tar Wastewater after adjusted pond is adjusted is sent into pressure Fe-C micro electrolysis（Also known as Inner electrolysis）Tower, and it is passed through industrial CO2Carry out microelectrolysis processing.Ferrum in Fe-C micro electrolysis tower：The ratio of charcoal Example is 8：1～1：4.Time of staying 1.0h～3.0h of the waste water in Fe-C micro electrolysis tower.Reaction temperature is 25 DEG C～60 DEG C. CO2Pressure be 0.1MPa～1.0MPa.Waste water lime cream or other alkaline matters after microelectrolysis processing adjusts its pH value To 6.8～8.5,1h～3h being precipitated subsequently into sedimentation tank, irregularly extracting sludge out from sedimentation tank and filtered, filter cake is endangered Dangerous disposition of solid waste, filtrate return sedimentation tank.The supernatant waste water of sedimentation tank send anaerobic reactor.Waste water is in anaerobic reactor Middle stop 24h～120h.Anaerobism temperature is 25 DEG C～55 DEG C.Waste water after anaerobism is into the process of biology aerobic pond room temperature, aerobic Process time is 8h～16h.Waste water after Aerobic Process for Treatment enters sedimentation tank and precipitates 1h～3h, irregularly extracts dirty out from sedimentation tank Mud 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 process.The filler of biological filtering tower combined working is activated carbon or porous ceramic grain, is 1.0m～2.0m per thickness degree, gross thickness be 2m～ 6m.The dominant bacteria of biological filtering tower combined working is the rhodopseudomonas in photosynthetic bacteria（Rhodopseudomonas）.The water of biological filtering tower combined working Power load 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 Coal Tar Wastewater enters Fe-C micro electrolysis tower, the macromole in waste water Organic substance, particularly persistence organic pollutant（Containing phenyl ring and（Or）The Organic substance of heterocycle etc.）Produced by Fe-C micro electrolysis Reduce the effect of free radical by force and destroy, be that subsequent biochemical process creates favorable conditions.It is passed through pressure CO2Purpose be maintain ferrum The suitable pH value of charcoal light electrolysis（2.0～5.0）.Waste water lime cream or other alkaline matters after reduction adjusts its pH value, with Meet the requirement of follow-up anaerobic and aerobic process.The premenstrual waste water for stating process in anaerobic processes, by the effect of microorganism, greatly Molecular organic further becomes small organic molecule, is that more favorable condition is created in subsequent bio oxidation.At biological oxidation Reason, remaining most of Organic substances are removed, while the pollutant such as removing to denitrogenate.Waste water finally enters activated carbon or porous ceramic grain life Thing filter tower, in the presence of microorganism, particularly rhodopseudomonas, the pollutant such as further organics removal and nitrogen, it is ensured that place Waste water stably reaching standard discharge after reason.
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 （Coal Tar Wastewater contains a small amount of 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；Burner, fuel combustion are all had in coal tar processing factory Burn the CO for producing2Waste gas can make full use of, and can not only reduce processing cost, and can reduce carbon emission；Waste water after process Energy stably reaching standard discharge, with obvious economic benefit and environmental benefit.
Specific implementation method
Embodiment 1：Day processes 1 cubic metre of Coal Tar Wastewater（Volatile phenol 2400mg/L, COD15500mg/L, CN-25.5mg/L、 NH3-N57mg/L）, Jing Fe-C micro electrolysis（3h、40℃、CO2Pressure 0.1MPa, ferrum：The ratio of charcoal is 8：1）, anaerobism（pH8.3、 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） After process, the pollutant levels of water outlet are respectively CODCr 57mg/L、NH3- N 7.1mg/L, volatile phenol 0.2mg/L, CN- 0.11mg/L。
Embodiment 2：Day processes 3 cubic metres of Coal Tar Wastewaters（Volatile phenol 920mg/L, COD8700mg/L, CN-17mg/L、 NH3-N48mg/L）, Jing Fe-C micro electrolysis（1h、25℃、CO2Pressure 0.3MPa, ferrum：The ratio of charcoal is 1：4）, anaerobism（pH6.8、 24h, 35 DEG C～55 DEG C）, it is aerobic（8h）And biological filtering tower combined working（Active carbon filler layer gross thickness 2m, hydraulic load 90m3/m2.d）Process The pollutant levels of water outlet are respectively COD afterwardsCr 47mg/L、NH3- N 6.4mg/L, volatile phenol 0.2mg/L, CN-0.08mg/L。

Claims (1)

1. a kind of processing method of Coal Tar Wastewater, it is characterised in that will adjusted pond adjust after Coal Tar Wastewater send into it is resistance to Foundary weight charcoal light electrolysis tower, and it is passed through industrial CO2Carry out microelectrolysis processing, ferrum in Fe-C micro electrolysis tower：The ratio of charcoal is 8：1～1： 4, time of staying 1.0h～3.0h of the waste water in Fe-C micro electrolysis tower, reaction temperature are 25 DEG C～60 DEG C, CO2Pressure be 0.1MPa～1.0MPa, the waste water lime cream or other alkaline matters after microelectrolysis processing 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 to stop 24h in anaerobic reactor ～120h, anaerobism temperature are 25 DEG C～55 DEG C, and the waste water after anaerobism into the process of biology aerobic pond room temperature, Aerobic Process for Treatment time is 8h～16h, the waste water after Aerobic Process for Treatment enter sedimentation tank and precipitate 1h～3h, and irregularly extracting sludge out from sedimentation tank was carried out Dangerous disposition of solid waste is made in filter, filter cake, and filtrate returns Aerobic Pond, and the supernatant waste water of sedimentation tank is sent at multi-layer biological filter tower Reason, the filler of biological filtering tower combined working 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 light The rhodopseudomonas in antibacterial are closed, 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 Qualified discharge or reuse.
CN201611259336.5A 2016-12-30 2016-12-30 Coal tar wastewater treatment method Pending CN106517691A (en)

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CN201611259336.5A CN106517691A (en) 2016-12-30 2016-12-30 Coal tar wastewater treatment method

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Application Number Priority Date Filing Date Title
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101665311A (en) * 2009-09-24 2010-03-10 中南大学 Catalysis and micro-electrolysis combined technology for high-concentration refractory organic wastewater

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101665311A (en) * 2009-09-24 2010-03-10 中南大学 Catalysis and micro-electrolysis combined technology for high-concentration refractory organic wastewater

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
湖南省爱国卫生运动委员会办公室 等编: "《爱国卫生运动工作手册》", 31 July 1986 *

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Application publication date: 20170322