WO2013000107A1 - Méthode de traitement de boue dans un état normal - Google Patents

Méthode de traitement de boue dans un état normal Download PDF

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Publication number
WO2013000107A1
WO2013000107A1 PCT/CN2011/076347 CN2011076347W WO2013000107A1 WO 2013000107 A1 WO2013000107 A1 WO 2013000107A1 CN 2011076347 W CN2011076347 W CN 2011076347W WO 2013000107 A1 WO2013000107 A1 WO 2013000107A1
Authority
WO
WIPO (PCT)
Prior art keywords
sludge
oxidation
directing agent
under normal
added
Prior art date
Application number
PCT/CN2011/076347
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English (en)
Chinese (zh)
Inventor
李志光
何纯莲
Original Assignee
湖南湘牛污泥深度处理有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 湖南湘牛污泥深度处理有限公司 filed Critical 湖南湘牛污泥深度处理有限公司
Priority to PCT/CN2011/076347 priority Critical patent/WO2013000107A1/fr
Publication of WO2013000107A1 publication Critical patent/WO2013000107A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/148—Combined use of inorganic and organic substances, being added in the same treatment step
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone

Definitions

  • the present invention relates to a method for treating sludge in municipal sewage, and more particularly to a method for separating water from sludge in an aqueous sludge.
  • Sludge is the residue of organic matter, microbial flora and so on, and floating foam floating on the surface of the sewage treatment plant. It contains a large number of pathogens, parasites, pathogenic microorganisms, dioxins and arsenic. Toxic heavy metals such as copper, mercury, and chromium, and even toxic and harmful substances that are difficult to degrade, such as radionuclides. How to further treat the sludge generated by the sewage treatment plant is a major problem in the world of environmental protection. Due to the colloidal water-in-water characteristics of the sludge, the sludge has a high moisture content and a large volume, which causes difficulties in stacking and transportation. If the urban sludge is improperly treated or not treated properly, such as random abandonment of mountain farmland or irregular landfill, it will pose a huge potential threat to the ecological environment.
  • sanitary landfill requires relatively simple equipment, but requires a large amount of landfill site and sludge transportation costs, and is prone to secondary pollution problems such as groundwater pollution and odor dissipation; incineration and thermal energy utilization technologies make full use of the generated biogas to build electricity.
  • Some new technologies and processes can shorten the residence time of sludge in the digester, enhance the stability of the sludge; treat the sludge with hydrazine; destroy the gel structure of the sludge by high-pressure pyrolysis, Drying and disinfecting the sludge, this method can reduce the volume of sludge, and The dried sludge can be a valuable agricultural fertilizer, the biggest disadvantage of this method is that the high costs of initial investment costs and energy daily. Looking at the foreign sludge treatment and disposal methods and comprehensive utilization, the overall trend has been gradually transformed from incineration and drying to the use of high-efficiency dehydration and resource utilization.
  • Oxidation technology and coagulation technology are the research hotspots of sludge treatment in recent years.
  • the research content mainly involves two aspects: the pre-treatment and coagulation technology and process of sludge.
  • the key is to use the polycondensation flocculant to form sludge granules of appropriate size based on the application of controlled wet oxidation technology to destroy the water-absorbing structure, so as to achieve the purpose of easy removal and easy separation of water.
  • the current technical process in this area is still immature, and there is no technological breakthrough in all aspects of reduction, stabilization and harmlessness. Research on this problem has been reported.
  • the experimental results show that the acid and surfactant can improve the dewatering performance and sedimentation performance of the sludge by changing the surface properties of the sludge floc, reducing the floc content of the sludge and releasing the water-in-oil.
  • Novak et al. studied the role of iron ions in determining floc structure and dehydration characteristics, especially the interaction of iron ions with proteins in biological enzymes. They point out that when iron ions increase, the protein in the solution is removed. This also leads to a reduction in sludge CST, which is beneficial to sludge dewatering.
  • In the coagulation technology of sludge treatment there are many researches on the use of composite flocculants/or coagulants.
  • the main types are: 1) inorganic flocculants, mainly iron salts (FeCl 3 , FeS0 4 , etc. and their polymerization) And aluminum salts (A1 2 (S0 4 ) 3 , A1C1 3 and other polymers such as polyaluminum chloride, polyaluminum sulfate, etc.); 2) synthetic organic polymer flocculants, such as polyamines, sodium polyacrylate , polypropylene amides, etc.; 3) natural polymer flocculants; 4) microbial flocculants, which can degrade phenol-containing wastewater, organic phosphorus farmers Domestic wastewater for medicinal wastewater, oily and humic organisms such as protein and starch.
  • inorganic flocculants mainly iron salts (FeCl 3 , FeS0 4 , etc. and their polymerization) And aluminum salts (A1 2 (S0 4 ) 3 , A1C1 3 and other polymers such as polyaluminum chloride, polya
  • the sludge that needs to be treated in depth in the sewage treatment plant in the sewage treatment process is the excess sludge.
  • the so-called activated sludge is an activated sludge that is discharged from the secondary sedimentation tank (or sedimentation zone) outside the system in an activated sludge system.
  • An object of the present invention is to provide a method for reducing the moisture content in excess sludge to less than 50% in a normal temperature and normal pressure condition, and simultaneously accomplishing sterilization, deodorization, and toxic heavy metal ion curing.
  • the technical proposal of the invention is to add an oxidizing agent to the sludge, stir, and pass ozone, stir the reaction, then add a prepreg, and finally the sludge is subjected to ordinary pressure filtration to obtain a sewage having a water content of 55% or less.
  • the oxidation directing agent is a mixture of carbon powder and transition metal chloride or transition metal sulfate, wherein the carbon powder accounts for 50-85% by weight of the oxidation directing agent; the transition metal is Fe, Mn, A1 Or V; the oxidation directing agent is added in an amount of: 200g to 400g of an oxidation directing agent is added to 99% of the water containing 30 ml of sludge; the amount of the prepreg is added; 99% of the water per cubic meter of sludge is added The copregant is 400g to 750g.
  • the ozone is used in an amount of 0.5 g to 3.0 g based on 1.00 kg of dry sludge.
  • composition and weight percentage of the prepreg FeCl 3 50-55%, PAC (Polyaluminium Chloride) 38-43, CPAM (Polyacrylamide) 5-10.
  • composition and content of the oxidation directing agent are preferably: 50% to 85% of carbon powder, ? 6. 1 3 is 15% ⁇ 50%.
  • the sludge obtained by the method of the present invention has a water content of less than 50% and a calorific value of 2300-2800 kcal/kg.
  • the method of the present invention uses a sludge treatment apparatus comprising a multi-function reactor with a stirrer, an ozone generator, a filter press system, etc., and the specific structure is as described in the utility model patent ZL201029092003.7.
  • the operation flow of the method for treating sludge in the normal state of the present invention is as shown in FIG. 1.
  • the excess sludge is introduced into the reaction tank, an oxidation directing agent is added to the sludge, stirred, and ozone is introduced, and then the reaction is stirred and then the coagulation is added.
  • the sludge is filtered by a filter press to obtain a sludge having a water content of 50% or less, wherein the moisture content is measured according to GB4284-84 "Urban Waste Agricultural Monitoring and Analysis Method".
  • the first combination of 0 3 and an oxidizing directing agent to form a hydroxyl radical, synergistic high-energy electron e* and the mass transfer medium MOFe to construct an energy state and orbital symmetry interface sg, s-1 microelectron transfer system The organic membrane sludge biofilm and cell structure undergo redox process, cracking the sludge microbial structure, breaking aniline, phenol and An organic macromolecular network membrane structure such as an extra-package polymer, which generates an organic radical (R.), further oxidizes the organic radical to hydrate the membrane structure of the organic substance, destroys the characteristic structure of the macromolecular organic membrane such as protein and polysaccharide, and releases the bacteria.
  • an organic radical R.
  • the water-incorporated water and the bound water of the micelle release the water-absorbing water and the structural water by oxidizing and degrading the organic micelle structure in the sludge.
  • the organic sludge of the membrane is agglomerated into particles, which is toxic. Heavy metal ions chelate and accumulate, effectively separating structural water, unit cell water, and pipetting water in the sludge.
  • composition and amount of the oxidizing directing agent used in the present invention are: carbon powder (m/m%): 50% to 85%, and a mixture of transition metal chloride or transition metal sulfate is 15% to 50%. When used, 99.0% of water per cubic meter of sludge is added to the oxidation director 200 ⁇ 400g.
  • the dosage of the high-energy electron e* carrier 0 3 of the invention In the process of sludge treatment, ozone is introduced, and the flow rate of ozone is related to the sludge concentration, which can be automatically controlled, and the amount of 0 3 is 0.5 based on 1.00 kg of dry sludge. ⁇ 3.0g.
  • the sludge treated by the treatment method of the invention has a low moisture content and a stable structure and a calorific value of 2300-2800 kcal/kg because the water content is reduced to less than 50%, which can be used for the coal substitute in the brick production. .
  • the sludge treated by the method provided by the present invention can reach the standard of the B-type sludge and can be directly used for forestry soil.
  • the invention breaks through the technical bottleneck which cannot remove the water-absorbing water containing organic sludge in the process of treating the sludge in the normal temperature, and achieves the purpose of low cost, good effect and treatment of the sludge to meet the national standard.
  • Fig. 1 is a flow chart showing the method of treating sludge in the normal state of the present invention.
  • the excess sludge with a concentration of 10364mg/L was introduced into the reaction tank, and the introduction amount was 10.73m 3 .
  • an oxidation directing agent 2.5kg of carbon powder and 0.8kg of FeCl 3
  • the system is oxidized by introducing 150g of ozone.
  • the coagulation agent FeCl 3 3.0kg, PAC2.5kg, CPAM 0.3kg
  • the sludge is filtered by a filter press to obtain a moisture content of 49.8%. mud.
  • the excess sludge with a concentration of 11094mg/L was introduced into the reaction tank, and the introduction amount was 10.38 m 3 .
  • an oxidation directing agent 2.5 kg of carbon powder and 1.0 kg of FeCl 3
  • the system is oxidized by passing 200g of ozone.
  • the coprecipitant FeCl 3 4.0kg, PAC 2.6kg, CPAM 0.3kg
  • the sludge is filtered by a filter press to obtain sludge with a water content of 49.5%. .
  • Example 3 The remaining sludge with a concentration of 9639mg/L was introduced into the reaction tank, and the introduction amount was 10.98 m 3 . Then, an oxidation directing agent (2.5 kg of carbon powder and 1.0 kg of FeCl 3 ) was added to the sludge, and after stirring for 8 minutes, ozone was generated again. The system is oxidized by introducing 120g of ozone into the system. After 30min, the coprecipitant (FeCl 3 2.0kg, PAC 2.4kg, CPAM 0.3kg) is added. Finally, the sludge is filtered by a filter press to obtain sludge with a water content of 48.6%. .
  • the excess sludge with a concentration of 11392mg/L was introduced into the reaction tank, and the introduction amount was 10.96 m 3 .
  • an oxidation directing agent 2.5 kg of carbon powder and 1.0 kg of FeCl 3
  • the system is oxidized by introducing 250g of ozone.
  • the coprecipitant FeCl 3 3.0kg, PAC 2.8kg, CPAM 0.4kg
  • the sludge is filtered by a filter press to obtain sludge with a water content of 48.6%. .
  • the potassium (K 2 0) content of the sludge is mg/kg 0.48

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

L'invention concerne une méthode de traitement de boue dans un état normal, consistant à (1) ajouter un régulateur oxydant à la boue, mélanger et introduire de l'ozone dans la boue; (2) après la réaction lors du mélange, ajouter un coagulateur à la boue, et effectuer une filtration sous pression pour obtenir une boue avec une teneur en eau inférieure ou égale à 50 %.
PCT/CN2011/076347 2011-06-25 2011-06-25 Méthode de traitement de boue dans un état normal WO2013000107A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/076347 WO2013000107A1 (fr) 2011-06-25 2011-06-25 Méthode de traitement de boue dans un état normal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/076347 WO2013000107A1 (fr) 2011-06-25 2011-06-25 Méthode de traitement de boue dans un état normal

Publications (1)

Publication Number Publication Date
WO2013000107A1 true WO2013000107A1 (fr) 2013-01-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104628484A (zh) * 2015-02-13 2015-05-20 郑州光亚环发适用技术研究所 一种由污泥制备生态肥料的方法
CN114907001A (zh) * 2022-06-23 2022-08-16 天津市创嘉生物技术有限公司 一种底泥氧化剂及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1486941A (zh) * 2003-07-30 2004-04-07 琳 王 一种利用臭氧氧化使活性污泥减量的方法及装置
US20040167019A1 (en) * 2001-07-17 2004-08-26 Zhi-Wei Liang Oxidative thermochemical drying process for changing hydrophilic/hydrophobic characteristics of natural organic substances
US20080230484A1 (en) * 2007-02-16 2008-09-25 Burnham Jeffrey C Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer
CN102092914A (zh) * 2010-12-03 2011-06-15 东莞市可迪环保科技有限公司 一种污泥处理装置及处理方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040167019A1 (en) * 2001-07-17 2004-08-26 Zhi-Wei Liang Oxidative thermochemical drying process for changing hydrophilic/hydrophobic characteristics of natural organic substances
CN1486941A (zh) * 2003-07-30 2004-04-07 琳 王 一种利用臭氧氧化使活性污泥减量的方法及装置
US20080230484A1 (en) * 2007-02-16 2008-09-25 Burnham Jeffrey C Process for treating sludge and manufacturing bioorganically-augmented high nitrogen-containing inorganic fertilizer
CN102092914A (zh) * 2010-12-03 2011-06-15 东莞市可迪环保科技有限公司 一种污泥处理装置及处理方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104628484A (zh) * 2015-02-13 2015-05-20 郑州光亚环发适用技术研究所 一种由污泥制备生态肥料的方法
CN114907001A (zh) * 2022-06-23 2022-08-16 天津市创嘉生物技术有限公司 一种底泥氧化剂及其制备方法
CN114907001B (zh) * 2022-06-23 2023-09-01 天津市创嘉生物技术有限公司 一种底泥氧化剂及其制备方法

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