CN102674800A - Method for producing porous support of biological film by matching wet sludge and construction waste - Google Patents

Method for producing porous support of biological film by matching wet sludge and construction waste Download PDF

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Publication number
CN102674800A
CN102674800A CN2012101957285A CN201210195728A CN102674800A CN 102674800 A CN102674800 A CN 102674800A CN 2012101957285 A CN2012101957285 A CN 2012101957285A CN 201210195728 A CN201210195728 A CN 201210195728A CN 102674800 A CN102674800 A CN 102674800A
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CN
China
Prior art keywords
porous support
waste
building waste
minute
produce
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CN2012101957285A
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Chinese (zh)
Inventor
张付申
李寅明
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中国科学院生态环境研究中心
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Priority to CN2012101957285A priority Critical patent/CN102674800A/en
Publication of CN102674800A publication Critical patent/CN102674800A/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a process for producing a porous support of a biological film by matching wet sludge and construction waste. Aiming at the conditions of high water content and treatment cost of sludge discharged by a sewage treatment plant, two types of waste which is produced in quantity is matched in a certain mode by combing the characteristic of construction waste, aids are added, and a series of treatment means is taken so as to realize high-value-added recycling of the two types of waste. The process is characterized in that the wet sludge discharged by the sewage treatment plant and the pre-treated construction waste and the aids are directly matched, and then are prepared into the porous support by the steps of compatibility, forming, drying, sintering and surface hole processing, and the sludge is not needed to be dewatered and dried. The raw materials required in the production process are low in price, and the method is easy and convenient to operate, low in energy consumption and high in efficiency. The produced product is mainly used as the support of the biological film of the sewage treatment plant, and filler for a trickling filter used during ozone treatment, and the process has wide market application prospect.

Description

Wet mud cooperates building waste to produce the technology of microbial film porous support
Technical field
The present invention relates to mud and building waste co-processing and produce the method for porous material; The solid waste that belongs to environment protection and comprehensive utilization of resources field is handled new technology, the harmless treatment and the recycling utilization that are particularly suitable for being rich in organic waste Yu are rich in the silicates waste.
Background technology
In sewage disposal technology; Biomembrance process is one of the most frequently used method; Thereby it is to make a series of miniature organisms such as mikrobe, protozoon and metazoan attached to forming microbial film on certain carrier; When effluent stream through the time, by the miniature organism on microbial film picked-up, sewage is purified organism wherein, miniature organism self obtains growth and breeding thereby make as nutritive substance.Biofilm carrier is the core of biomembrance process, and its performance directly has influence on adhering to of miniature organism, thereby influences the effect that biomembrance process is disposed of sewage.Specific surface area and porosity are the pacing itemss of biofilm carrier.Guarantee biomembrance process normally operation in WWT, biofilm carrier must satisfy following characteristic: be prone to fluidisation and be difficult for loss, this is mainly reflected in the biological fluidized-bed reactor; Be easy to hang film and toxicological harmless effect; Can provide bigger specific surface area to increase the biological attachment amount; Cheap and be easy to gather materials on the spot condition.The biofilm carrier that uses at present; Like rubble, cobble, slag and coke; By high molecular polymer synthetic corrugated plate shape, tubulation shape and cellular material etc. such as Vilaterm, PS or polymeric amide, there is the deficiency that specific surface area is little, porosity is low, microbial film comes off easily.
Along with the continuous quickening of Urbanization in China, the generation of building waste and discharge quantity are also in quick growth.Also in the worry that brought by municipal wastes, building waste occupies sizable ratio to people among the municipal wastes, accounts for the 30%-40% of rubbish total amount when enjoying urban civilization; According to rough Statistics; In per ten thousand square metres of building construction processes, produce the about 500t--600t of building waste residue, the annual new area that is completed of our country has reached 2,000,000,000 square meters now; Near whole world year building the half the of total amount; By this estimation, only construction building rubbish is annual produces more than one hundred million tons, adds that construction and decoration, removal, the building waste quantity that building materials industry produced will reach several hundred million tons.Overwhelming majority building waste is without any processing; Just transported to countryside or rural area by unit in charge of construction; Air storage or landfill; Consume pork barrels such as a large amount of land acquisitions takes, refuse collection expense, simultaneously, clear with stacking process in drop with problems such as dust, sand-lime fly upward and caused the serious environmental pollution again.How to handle and utilize increasing building waste, become government agencies at all levels and building waste output and handled the important topic that unit faced.
Sludge of sewage treatment plants is the by product of WWT, forms complicacy, big, easy corrupt, the foul smelling of volume.Moisture percentage in sewage sludge is high, and parasitic various bacteriums, virus and Parasites in the high-content organism are wherein also concentrating toxic organic compounds such as heavy metal compound such as Cu, Pb, Cd, Cr and polycyclic aromatic hydrocarbons 、 dioxin.Along with improving constantly of the socioeconomic fast development and the level of urbanization, the quantity discharged of China's industrial sewage and city domestic sewage is increasing, and the sewage collecting processing rate improves constantly with the processing degree of depth, and sludge yield also just increases with about speed of annual 10%.The disposal options of mud mainly contains sanitary landfill, agricultural utilization, burning and recycling etc.Though the sanitary landfill cost is low, and is simple to operate, once be the sludge disposal mode that developed country generally adopts; But moisture percentage in sewage sludge is high; Be difficult to compacting in rainy season, landfill takes up an area of length wide, consuming time in addition, and percolate pollutes underground water easily; And landfill yard can produce inflammable gases such as methane, and misoperation causes landfill yard burning and blast easily.The agricultural utilization of mud then need be carried out innoxious pre-treatment to mud.Sludge incineration is sludge reduction and innoxious mode the most completely; The developed country rare in the soil extensively adopted; But the high-moisture percentage of mud makes that the burning energy consumption is huge, and burning facility investment and working cost are all very high, and flue dust diffuses to and is prone to cause atmospheric pollution in the atmosphere in the burning process.
In traditional porous material burning techniques, mainly adopting clay is main raw material, and is aided with auxiliary materials such as other additives, solubility promoter, and at high temperature burning expands processes ceramic product, but a large amount of clay that uses can bring destruction to the eubiosis and environment protection.Up to now, the relevant solid waste of utilizing is also relatively more rare for the report of raw material production porous grain.It is effectively alternative to use building waste and mud that clay is carried out, and mud and building waste is carried out the main raw material that suitable proportion arranges in pairs or groups as firing porous material be used, and meets innoxious, the minimizing and the resource utilization principle of China's solid waste processing.The present invention is a main raw material(s) with the wet mud and the building waste of the municipal wastewater treatment plant discharging of a large amount of generations, through a series of processing and processing porous matter biofilm carrier, has remarkable economic efficiency, environmental benefit and social benefit.
Summary of the invention
The present invention is directed to the present situation that sludge moisture content is big, processing cost is high, the practicality treatment technology is deficient that sewage work discharges; Characteristics in conjunction with building waste self; Two types of a large amount of wastes that produce are pressed certain way cooperate, through adding auxiliary agent and implementing the high added value recycling that a series of processing realize two types of wastes.Main purpose provides the technology that cover hygroscopic state sewage sludge and a building waste co-processing prepares the microbial film porous support.Needed low in raw material cost is easy to get in the production process, and production cost is low, and method of manufacture is easy, and production efficiency is high.It is characterized in that: the hygroscopic state sewage sludge of sewage work's discharging is directly cooperated with the building waste of process pre-treatment; Produce porous carrier through operations such as compatibility, moulding, drying, sintering, aftertreatments; Need not dewater and drying treatment, reduce energy consumption mud.In the implementation process of the present invention, can realize making full use of of two kinds of raw materials, not have waste material to produce in process of production.Concrete technology comprises following step:
1, crushing and grinding operation: building waste is sent into travelling belt after air-dry, reclaim wherein ferromagnetic article through magnetic separation, again with reclaiming behind the goods sortings such as timber, plastics, duraluminum; Through travelling belt material is sent in the impact crusher; Inorganic components such as concrete segment, brick and tile, sandstone, finishing material, glass fragment, assorted soil is broken; Be sent to the broken thing of sorting in 2 millimeters the roller grizzly then; Screen overflow is returned crusher through travelling belt, and screen underflow is after heat treatment sent into raymond grinding powder and is milled to the 60-100 order.
2, compatibility molding procedure: the building waste behind the grinding, whipping agent, stablizer are (40-60) by mass ratio: (3-9): it is even that proportioning (7-1) is put into stirrer for mixing; Be the mud that the ratio of (50-30) adds water cut 75-95% in the stirrer in mass ratio then; After mixing, send into travelling belt and two to roll that molding, granulating makes carrier green-ball material in the tablets press.
3, drying and sintering operation: carrier green-ball material is sent in the drying machine heat-treats, bake out temperature is 80-110 ℃, and drying time is 30-120 minute; Send into then and carry out sintering in the two-part sinter machine, control first section temperature rise rate 10-20 ℃/minute, temperature 400-550 ℃; Treatment time is 30-40 minute; Control second section temperature rise rate 5-15 ℃/minute, temperature 850-980 ℃, roasting time is 20-30 minute.Sintering naturally cools to room temperature after accomplishing, and makes the thick product of carrier.
4, surface holes treatment process: with the thick transferred product of carrier to planetary ball mill; Under 250-400 rev/min speed conditions ball milling 5-15 minute; Use travelling belt to deliver to the aperture then as in 1.8-2.0 centimetre the trommel screen; Thing is high-performance high-quality biofilm carrier in the sieve, and the following waste material of sieve returns the crushing and grinding operation through travelling belt and utilizes.
Mud among the present invention is meant the dewatered sludge that city domestic sewage treatment plant produces, and water ratio is generally 75%~95%; The inorganic mineral that building waste comprises construction, produce in the process of pulling down and removing a building for reconstruction and the building materials production process.The heat release when high-temp combustion of organism in the mud can be played the effect that reduces maturing temperature; Contain CaO, MgO, K in the mud inorganic components 2O, Na 2The composition of fluxing such as O can play and reduce the content that adds auxiliary material; But high-moisture percentage becomes ball impact bigger to haydite green-ball material in the mud; Be prone to cause haydite green-ball material spheroid when drying to break; Therefore will control the ratio of mud in mixture, will add balling ratio and intensity that stablizer improves the green-ball material simultaneously, the pellet that reduces in the drying process breaks.Haydite green-ball material drying course can make moisture loss wherein, crosses a large amount of the scattering and disappearing of high-moisture and causes green-ball pellet body to break for preventing bake out temperature, and the green-ball material bake out temperature among the present invention is controlled in the 80-110 ℃ of scope.Warm can consume a part of organism in the green-ball material, can prevent organism in the green-ball material in the quick consumption in high-temperature roasting stage and the green-ball pellet body that causes break.Can select whether to be employed in constant temperature for some time under this temperature according to practical situation.
Further set forth content of the present invention below in conjunction with Figure of description and embodiment.
Description of drawings
Fig. 1 is that mud cooperates building waste to prepare the process flow sheet of microbial film porous support.
Fig. 2 is the photo of microbial film porous support, and A is the thick product of carrier, and B is the product after surface holes is handled.
Fig. 3 is the inner micropore structure figure of microbial film porous support.
Embodiment
Embodiment given below intends the present invention is further specified; But can not be interpreted as it is restriction to protection domain of the present invention; The technician in this field to some nonessential improvement and adjustment that the present invention makes, still belongs to protection scope of the present invention according to the foregoing invention content.
Embodiment 1
A kind of wet mud cooperates building waste to produce the technology of microbial film porous support, specifically comprises the following steps:
(1) reinforcing bar in the building waste, timber, plastics, duraluminum and other metals being sorted the back disposes as renewable resource; Then that inorganic non-metallic compositions such as remaining concrete segment, brick and tile, sandstone, finishing material, glass fragment, assorted soil is broken in impact crusher; With the broken thing of 2 mm sieve sortings, screen overflow is returned crusher.Cross 60 mesh sieves after the fragmentation after the thermal treatment in the screen underflow process external-heating revolving process furnace.
(2) get 45 parts in building waste powder, 7 parts of whipping agents, suds-stabilizing agent carries out stirring and evenly mixing for 5 parts.
(3) be that 43 parts of hygroscopic state sewage sludges carry out mixing and stir with mixture behind the mixing of step (2) gained and water ratio 85%.
(4) the mixture balling-up granulation behind the stirring and evenly mixing in the step (3) is obtained the green-ball material.
(5) with constant temperature after 80 ℃ of the green-ball material in the step (4) heating 60 minutes.
(6) temperature rise rate with 17.2 ℃/minute in the green-ball material of step (5) gained is heated to 500 ℃ of insulations 30 minutes.
(7) on the basis of step (6), continue to be heated to 940 ℃ of insulations 25 minutes with 11.9 ℃ of/minute temperature rise rates.
(8) product in the step (7) is sieved; Back specification product naturally cool to room temperature; Promptly get the thick product of microbial film porous support; Thick product rotating speed ball milling with 250 rev/mins in planetary ball mill was promptly got the high-quality biofilm carrier in 10 minutes, and substandard product gets into the building waste crushing screening utilization of crusher after sorting.
Through detecting, the light ceramic pellet density of this embodiment preparation is 850kg/m 3, tap density is 580kg/m 3, cylindrical compress strength is 2.78MPa.
Embodiment 2
A kind of wet mud cooperates building waste to produce the technology of microbial film porous support, specifically comprises the following steps:
(1) reinforcing bar in the building waste, timber, plastics, duraluminum and other metals being sorted the back disposes as renewable resource; Then that inorganic non-metallic compositions such as remaining concrete segment, brick and tile, sandstone, finishing material, glass fragment, assorted soil is broken in jaw crusher; With the broken thing of 2 mm sieve sortings, screen overflow is returned crusher.Cross 20 mesh sieves after the fragmentation after the thermal treatment in the screen underflow process external-heating revolving process furnace.
(2) get 50 parts in building waste powder, 7 parts of pore-creating whipping agents, suds-stabilizing agent carries out stirring and evenly mixing for 3 parts.
(3) the wet mud with mixture behind the mixing of step (2) gained and water ratio 85% carries out the mixing stirring for 40 parts.
(4) the mixture balling-up granulation behind the stirring and evenly mixing in the step (3) is obtained the green-ball material.
(5) with 85 ℃ of constant temperature of the green-ball material in the step (4) 60 minutes.
(6) temperature rise rate with 15 ℃/minute in the green-ball material of step (5) gained is heated to 450 ℃ of insulations 40 minutes.
(7) on the basis of step (6), continue to be heated to 950 ℃ of insulations 20 minutes with 12.3 ℃ of/minute temperature rise rates.
(8) product in the step (7) is sieved; Back specification product naturally cool to room temperature; Promptly get the thick product of microbial film porous support; Thick product rotating speed ball milling with 300 rev/mins in planetary ball mill was promptly got the high-quality biofilm carrier in 12 minutes, and substandard product gets into the building waste crushing screening utilization of crusher after sorting.
Through detecting, the light ceramic pellet density of this embodiment preparation is 820kg/m 3, tap density is 620kg/m 3, cylindrical compress strength is 3.24MPa.
Embodiment 3
A kind of wet mud cooperates building waste to produce the technology of microbial film porous support, specifically comprises the following steps:
(1) reinforcing bar in the building waste, timber, plastics, duraluminum and other metals being sorted the back disposes as renewable resource; Then that inorganic non-metallic compositions such as remaining concrete segment, brick and tile, sandstone, finishing material, glass fragment, assorted soil is broken in jaw crusher; With the broken thing of 2 mm sieve sortings, screen overflow is returned crusher.Cross 40 mesh sieves after the fragmentation after the thermal treatment in the screen underflow process external-heating revolving process furnace.
(2) get 40 parts in building waste powder, 5 parts of pore-creating whipping agents, suds-stabilizing agent carries out stirring and evenly mixing for 5 parts.
(3) be that 50 parts of hygroscopic state sewage sludges carry out mixing and stir with mixture behind the mixing of step (2) gained and water ratio 85%.
(4) the mixture balling-up granulation behind the stirring and evenly mixing in the step (3) is obtained the green-ball material.
(5) with constant temperature after 90 ℃ of the green-ball material in the step (4) heating 50 minutes.
(6) temperature rise rate with 16 ℃/minute in the green-ball material of step (5) gained is heated to 500 ℃ of insulations 35 minutes.
(7) on the basis of step (6), continue to be heated to 960 ℃ of insulations 25 minutes with 11 ℃ of/minute temperature rise rates.
(8) product in the step (7) is sieved; Back specification product naturally cool to room temperature; Promptly get the thick product of microbial film porous support; Thick product rotating speed ball milling with 350 rev/mins in planetary ball mill was promptly got the high-quality biofilm carrier in 8 minutes, and substandard product gets into the building waste crushing screening utilization of crusher after sorting.
Through detecting, the light ceramic pellet density of this embodiment preparation is 760kg/m 3, tap density is 600kg/m 3, cylindrical compress strength is 3.86MPa.
In the above-mentioned instance, said mud is the dewatered sludge that city domestic sewage treatment plant produces, and building waste is the waste that urban building is pulled down and removed a building for reconstruction and produced in the process.The invention is not restricted to the foregoing description, summary of the invention all can be implemented, and has good effect.

Claims (4)

1. wet mud cooperates building waste to produce the technology of microbial film porous support, specifically comprises crushing and grinding operation, compatibility molding procedure, drying and sintering operation, surface holes treatment process; It is characterized in that: the construction waste crushing particle diameter is that the grinding particle diameter is the 60-100 order less than 2.5 centimetres.
2. cooperate building waste to produce the technology of microbial film porous support according to right 1 described wet mud, it is characterized in that: building waste and wet mud are pressed mass ratio (40-60) in the compatibility molding procedure: mixed (50-30), two tablets press molding, granulatings that roll; Used moisture percentage in sewage sludge is 75-95%.
3. cooperate building waste to produce the technology of microbial film porous support according to right 1 described wet mud; It is characterized in that: use the two-part sinter machine to carry out sintering in the drying and sintering operation, control first section temperature rise rate 10-20 ℃/minute, temperature 400-550 ℃; Treatment time is 30-40 minute; Control second section temperature rise rate 5-15 ℃/minute, temperature 850-980 ℃, roasting time is 20-30 minute.
4. cooperate building waste to produce the technology of microbial film porous support according to right 1 described wet mud; It is characterized in that: use planetary ball mill in the surface holes treatment process; Under 250-400 rev/min speed conditions ball milling 5-15 minute; Use the aperture to be 1.8-2.0 centimetre trommel screen sorting then, thing is high-performance high-quality biofilm carrier in the sieve, and sieve waste material down returns the crushing and grinding operation through travelling belt and utilizes.
CN2012101957285A 2012-06-14 2012-06-14 Method for producing porous support of biological film by matching wet sludge and construction waste CN102674800A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104083945A (en) * 2014-05-22 2014-10-08 内蒙古大学 Zeolite ceramic prepared by utilizing coal gangue and construction waste and preparation technology thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101406777A (en) * 2008-11-10 2009-04-15 河南工业大学 Porous porcelain granule filter material based on glass and sludge, and preparation method thereof
CN101624293A (en) * 2009-07-31 2010-01-13 柳树 Method for making ceramsites by utilizing slush and urban garbage
CN102320812A (en) * 2011-05-18 2012-01-18 李俊 Method for manufacturing sintered product by wet sludge
CN102329122A (en) * 2011-06-21 2012-01-25 东莞市保源达房地产开发有限公司 Light high-strength ceramic grains manufactured by utilizing pond sludge and manufacturing method thereof
CN102336580A (en) * 2011-06-21 2012-02-01 东莞市保源达房地产开发有限公司 Lightweight high-strength ceramic particles manufactured by using urban sludge and manufacturing method for lightweight high-strength ceramic particles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101406777A (en) * 2008-11-10 2009-04-15 河南工业大学 Porous porcelain granule filter material based on glass and sludge, and preparation method thereof
CN101624293A (en) * 2009-07-31 2010-01-13 柳树 Method for making ceramsites by utilizing slush and urban garbage
CN102320812A (en) * 2011-05-18 2012-01-18 李俊 Method for manufacturing sintered product by wet sludge
CN102329122A (en) * 2011-06-21 2012-01-25 东莞市保源达房地产开发有限公司 Light high-strength ceramic grains manufactured by utilizing pond sludge and manufacturing method thereof
CN102336580A (en) * 2011-06-21 2012-02-01 东莞市保源达房地产开发有限公司 Lightweight high-strength ceramic particles manufactured by using urban sludge and manufacturing method for lightweight high-strength ceramic particles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104083945A (en) * 2014-05-22 2014-10-08 内蒙古大学 Zeolite ceramic prepared by utilizing coal gangue and construction waste and preparation technology thereof
CN104083945B (en) * 2014-05-22 2015-12-09 内蒙古大学 A kind of utilize gangue and building waste to prepare zeolite ceramsite and technology of preparing

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