CN108285305B - Method for preparing building material by using microbial activated sludge - Google Patents
Method for preparing building material by using microbial activated sludge Download PDFInfo
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- CN108285305B CN108285305B CN201711289764.7A CN201711289764A CN108285305B CN 108285305 B CN108285305 B CN 108285305B CN 201711289764 A CN201711289764 A CN 201711289764A CN 108285305 B CN108285305 B CN 108285305B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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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
- 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
-
- 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
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/10—Burned or pyrolised refuse
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/001—Waste organic materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Activated Sludge Processes (AREA)
Abstract
The invention belongs to the technical field of microbial sludge treatment, and discloses a method for preparing a building material by using microbial activated sludge, which specifically comprises the following steps: the microbial activated sludge is subjected to treatment modes such as combustion, hydrolysis and the like, and is compatible with other raw materials for preparing building materials. The method has the characteristics of simple process operation, low production cost, energy conservation, environmental protection and the like.
Description
Technical Field
The invention relates to a method for preparing a building material by utilizing microbial activated sludge, and particularly belongs to a method for treating microbial activated sludge.
Background
With the rapid development of industry, the amount of sludge in matched industrial sewage treatment stations is greatly increased, and how to better treat the sludge is also the focus of attention of people. The wastewater treatment of amino acid production enterprises mostly adopts microbial technology, and a large amount of microbial activated sludge can be generated. The sludge incineration is that an incinerator is used for heating and drying dehydrated sludge, and organic matters in the sludge are oxidized at high temperature, so that the sludge becomes a small amount of ash. The method is a reduction, stabilization and harmless treatment method, can completely remove water and organic matters in the sludge and kill pathogens.
Generally, the water content of the sludge delivered to the incinerator is high, and the sludge incineration needs a long time and consumes more energy, which is not beneficial to environmental protection. Therefore, how to solve the problems of the prior art is the key point of the invention. The inventor finds that the coal foam is a common mineral resource through investigation, has wider application and lower price than lump coal. Therefore, the dehydrated sludge is mixed with the foam coal for use, thereby not only improving the combustion efficiency of the sludge, but also being economical and practical. The prior art also reports that the sludge is directly used as a building material, for example, Chinese patent technology' 201610787371.8, a preparation method of a mildew-proof and frost-proof aerated brick, directly applies the sludge to the preparation of an aerated brick building material, but has the defects of high content of microorganisms in the sludge, easy potential safety hazard, lower compressive strength and the like.
Disclosure of Invention
The invention improves the conventional calcination treatment method in the prior art, and greatly improves the utilization efficiency of the sludge.
The invention aims to provide a method for preparing a building material by utilizing microbial activated sludge, which has the characteristics of simple process operation, low production cost, energy conservation, environmental protection and the like.
The invention is completed by the following technical scheme:
a method for preparing building materials by utilizing microbial activated sludge specifically comprises the following steps: treating the microbial activated sludge for preparing the building material.
Specifically, the method comprises the following steps:
step 1) dividing the dehydrated microbial activated sludge into a large part of microbial activated sludge and a small part of microbial activated sludge, wherein the large part of dehydrated microbial activated sludge is used for combustion, and the small part of dehydrated microbial activated sludge is used for preparing a foaming agent;
step 2) adding foam coal into a large amount of dehydrated microbial activated sludge to obtain fuel sludge; feeding the fuel sludge into an incinerator for combustion, collecting combustion waste residues and obtaining heat;
the heat is collected by the heat collecting and converting device and supplies power to the dehydrator;
the two ends of the heat collecting and converting device are directly connected with the incinerator and the dehydrator, so that the energy consumption loss in the middle is reduced.
Step 3) drying a small part of dehydrated microorganism activated sludge until the water content is lower than 20 wt%, then adding 3-4M hydrochloric acid solution with the same mass, heating to 80-90 ℃, hydrolyzing for 3-5h under the heat preservation condition, centrifuging for 5min at 1000rpm, and collecting precipitate to obtain a foaming agent;
step 4) conveying the combustion waste residue, the portland cement, the quartz sand, the fly ash, the triethanolamine, the calcium lignosulfonate and the foaming agent obtained in the step 3) to a stirrer according to the mass ratio of 100-90: 30-50: 10-20: 1-2: 2-3, adding water accounting for twice the mass of the combustion waste residue, and uniformly mixing to obtain a mixture;
step 5) pouring the mixture into a mold, and performing compression molding by a press machine to obtain a brick blank, wherein the compression strength is 20-22MPa, and the compression time is 30-40 s; placing the green brick into a resting room, sealing the resting room, keeping the temperature at 50-55 ℃, and resting for 2-3 hours; and cutting the statically-cured brick blank into blocks by a cutting machine, and finally putting the blocks into a steam curing kettle for steam curing treatment to obtain the foamed brick building material.
Preferably, the first and second electrodes are formed of a metal,
in the step 2), the addition amount of the foamed coal accounts for 6-20% of the mass of the large amount of the dehydrated microbial activated sludge.
Preferably, the first and second electrodes are formed of a metal,
in the step 4), the temperature of the autoclaved curing treatment is 150-.
Preferably, the first and second electrodes are formed of a metal,
the preparation method of the dehydrated microorganism activated sludge comprises the following steps: adding a purification flocculant into a sludge settling tank in a sewage treatment station to obtain settled sludge; the settled sludge is sent into a dehydrator for dehydration treatment to obtain dehydrated sludge, and the content of microorganisms in the prepared dehydrated sludge is 1010-1012cfu/g。
Preferably, the first and second electrodes are formed of a metal,
the purifying flocculant is one or a mixture of more than two of polyacrylamide, polyaluminium chloride, polyferric sulfate and diatomite.
The technical scheme of the invention has the following outstanding characteristics and remarkable progress, but is not limited to the following aspects:
the activated sludge is treated in batches by the calcining technology and the hydrolysis technology, so that the activated sludge is used as a main raw material and a foaming agent of the foamed brick, large-scale wastes generated by amino acid production enterprises are effectively utilized, and the foamed brick is prepared;
the foamed brick has the advantages of reasonable raw material compatibility, low cost, simple preparation process, better corrosion resistance, high mechanical strength and good heat preservation, heat insulation and sound insulation performance;
the technical process of the invention mixes the dewatered sludge and the foam coal for use, and has high combustion efficiency; the technical process collects the combustion heat through the heat collecting and converting device and supplies energy to the dehydrator, so that the heat waste can be reduced, and the energy is saved and the environment is protected;
the activated sludge is treated by drying and heating hydrolysis, so that mycoprotein in the sludge is hydrolyzed into small fragments of polypeptide and amino acid which can be used as a foaming agent, the stability and the compatibility are good, the cost is reduced, and the waste is utilized;
the flocculation technology process of the invention utilizes one or more of polyacrylamide, polyaluminium chloride, polyferric sulfate and diatomite to purify the flocculant, and has high flocculation speed and good effect.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the present invention will be described more clearly and completely below with reference to specific embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A method for preparing building materials by utilizing microbial activated sludge specifically comprises the following steps:
dividing the dehydrated microbial activated sludge into a large part of microbial activated sludge and a small part of microbial activated sludge, wherein the large part of microbial activated sludge is used for combustion, and the small part of microbial activated sludge is used for preparing a foaming agent;
mixing foam coal into a large amount of microbial activated sludge to obtain fuel sludge, wherein the addition amount of the foam coal accounts for 10% of the mass of the sludge; feeding the fuel sludge into an incinerator for combustion, collecting combustion waste residues, obtaining heat, collecting the heat through a heat collecting and converting device, and supplying energy to a dehydrator;
drying a small part of microbial activated sludge until the water content is lower than 20 wt%, then adding the microbial activated sludge into a 3M hydrochloric acid solution with the same mass, heating to 85 ℃, hydrolyzing for 5 hours under the condition of heat preservation, centrifuging for 5 minutes at 1000rpm, and collecting precipitates to obtain a foaming agent;
conveying the combustion waste residue, Portland cement, quartz sand, fly ash, triethanolamine, calcium lignosulfonate and foaming agent into a stirrer according to the mass ratio of 150: 90: 50: 20: 2: 3, adding water accounting for twice of the mass of the combustion waste residue, and uniformly mixing and stirring to obtain a mixture;
pouring the mixture into a mold, and performing compression molding by a press machine to obtain a brick blank, wherein the compression strength is 20MPa, and the compression time is 40 s; placing the green brick body into a resting room, sealing the resting room, keeping the temperature at 50 ℃, and resting for 2-3 hours; cutting the statically-cured brick blank into blocks by a cutting machine, and finally putting the blocks into a steam curing kettle for steam curing treatment to obtain the foamed brick building material, wherein the steam curing treatment is carried out at the temperature of 150 ℃, under the pressure of 1.3MPa and for 2 hours.
The preparation method of the dehydrated microorganism activated sludge comprises the following steps:
adding a purification flocculant into a sludge settling tank in a sewage treatment station to obtain settled sludge; the purifying flocculant is polyacrylamide, the addition amount of the purifying flocculant is 0.1 wt%, and the water content of the settled sludge is 95 wt%; and (3) sending the settled sludge into a dehydrator for dehydration treatment to obtain dehydrated sludge, wherein the water content of the dehydrated sludge is 50 wt%.
Example 2
A method for preparing building materials by utilizing microbial activated sludge specifically comprises the following steps:
dividing the dehydrated microbial activated sludge into a large part of microbial activated sludge and a small part of microbial activated sludge, wherein the large part of microbial activated sludge is used for combustion, and the small part of microbial activated sludge is used for preparing a foaming agent;
mixing foam coal into a large amount of microbial activated sludge to obtain fuel sludge, wherein the addition amount of the foam coal accounts for 10% of the mass of the sludge; feeding the fuel sludge into an incinerator for combustion, collecting combustion waste residues, obtaining heat, collecting the heat through a heat collecting and converting device, and supplying energy to a dehydrator;
drying a small part of microbial activated sludge until the water content is lower than 20 wt%, then adding the microbial activated sludge into a 3M hydrochloric acid solution with the same mass, heating to 90 ℃, hydrolyzing for 4 hours under the condition of heat preservation, centrifuging for 5min at 1000rpm, and collecting precipitates to obtain a foaming agent;
conveying the combustion waste residue, Portland cement, quartz sand, fly ash, triethanolamine, calcium lignosulfonate and foaming agent into a stirrer according to the mass ratio of 100: 70: 30: 10: 1: 2, adding water which accounts for twice the mass of the combustion waste residue, and uniformly mixing and stirring to obtain a mixture;
pouring the mixture into a mold, and performing compression molding by a press machine to obtain a brick blank, wherein the compression strength is 22MPa, and the compression time is 30 s; placing the green brick body into a resting room, sealing the resting room, keeping the temperature at 50 ℃, and standing for 3 hours; cutting the statically-cured brick blank into blocks by a cutting machine, and finally putting the blocks into a steam curing kettle for steam curing treatment to obtain the foamed brick building material, wherein the steam curing treatment is carried out at the temperature of 180 ℃, the pressure of 1.3MPa and the time of 3 h.
The preparation method of the dehydrated microorganism activated sludge comprises the following steps:
adding a purification flocculant into a sludge settling tank in a sewage treatment station to obtain settled sludge; the purifying flocculant is polymeric ferric sulfate, the addition amount of the polymeric ferric sulfate is 0.15 wt%, and the water content of the settled sludge is 90 wt%; and (3) sending the settled sludge into a dehydrator for dehydration treatment to obtain dehydrated sludge, wherein the water content of the dehydrated sludge is 60 wt%.
Example 3
A method for preparing building materials by utilizing microbial activated sludge specifically comprises the following steps:
dividing the dehydrated microbial activated sludge into a large part of microbial activated sludge and a small part of microbial activated sludge, wherein the large part of microbial activated sludge is used for combustion, and the small part of microbial activated sludge is used for preparing a foaming agent;
adding foam coal into a large amount of microbial activated sludge to obtain fuel sludge, wherein the addition amount of the foam coal accounts for 8% of the mass of the sludge; feeding the fuel sludge into an incinerator for combustion, collecting combustion waste residues, obtaining heat, collecting the heat through a heat collecting and converting device, and supplying energy to a dehydrator;
drying a small part of microbial activated sludge until the water content is lower than 20 wt%, then adding 3.5M hydrochloric acid solution with the same mass into the dried small part of microbial activated sludge, heating the mixture to 85 ℃, hydrolyzing the mixture for 4 hours under the condition of heat preservation, centrifuging the mixture for 5 minutes at 1000rpm, and collecting precipitates to obtain a foaming agent;
conveying the combustion waste residue, the portland cement, the quartz sand, the fly ash, the triethanolamine, the calcium lignosulfonate and the foaming agent into a stirrer according to the mass ratio of 120: 80: 30: 15: 2: 1: 2, adding water which accounts for twice of the mass of the combustion waste residue, and uniformly mixing and stirring to obtain a mixture;
pouring the mixture into a mold, and performing compression molding by a press machine to obtain a brick blank, wherein the compression strength is 21MPa, and the compression time is 35 s; placing the green brick body into a resting room, sealing the resting room, keeping the temperature at 52 ℃, and standing for 2.5 hours; cutting the statically-cured brick blank into blocks by a cutting machine, and finally putting the blocks into a steam curing kettle for steam curing treatment to obtain the foamed brick building material, wherein the steam curing treatment is carried out at the temperature of 160 ℃, the pressure of 1.4MPa and the time of 2.5 h.
The preparation method of the dehydrated microorganism activated sludge comprises the following steps:
adding a purification flocculant into a sludge settling tank in a sewage treatment station to obtain settled sludge; the purifying flocculant is polyaluminium chloride, the addition amount of the purifying flocculant is 0.2 wt%, and the water content of the settled sludge is 90 wt%; and (3) sending the settled sludge into a dehydrator for dehydration treatment to obtain dehydrated sludge, wherein the water content of the dehydrated sludge is 50 wt%.
Example 4
The performance test of the foamed brick building material prepared by the invention takes the examples 1-3 as examples, and the specific results are shown in the following table 1:
TABLE 1
And (4) conclusion: the foamed brick building material prepared in the embodiments 1-3 of the invention has the advantages of low density, good heat preservation and sound insulation performance, corrosion resistance, low water absorption rate and better compressive strength.
Example 5
The influence of the foaming agent prepared by hydrolyzing the sludge on the building material is as follows:
taking example 1 as an example, a control group was set, wherein control group 1: the rest of the process was the same as example 1, using expanded perlite as the foaming agent; example 2: the rest of the process was the same as example 1, except that sodium lauryl sulfate was used as a foaming agent; specific performance indexes are shown in table 2:
TABLE 2
And (4) conclusion: the invention adopts hydrolyzed mycoprotein as the foaming agent, and the difference between most performances and the effect of the conventional foaming agent is not large, wherein, the density of the foaming brick is reduced, the heat preservation effect and the water absorption rate are superior to the conventional foaming agent, which indicates that the foaming agent can be used as a substitute of the conventional foaming agent, saves the cost and utilizes the waste.
The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and the present invention is not limited thereto. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (2)
1. A method for preparing a building material by using microbial activated sludge is characterized by comprising the following steps:
step 1) dehydrating the microbial activated sludge to obtain dehydrated microbial activated sludge, and dividing the dehydrated microbial activated sludge into a large part of microbial activated sludge and a small part of microbial activated sludge, wherein the large part of dehydrated microbial activated sludge is used for combustion, and the small part of dehydrated microbial activated sludge is used for preparing a foaming agent;
step 2) adding foam coal into a large amount of dehydrated microbial activated sludge to obtain fuel sludge; feeding the fuel sludge into an incinerator for combustion, collecting combustion waste residues and obtaining heat;
step 3) drying a small part of dehydrated microorganism activated sludge until the water content is lower than 20 wt%, then adding the dried small part of dehydrated microorganism activated sludge into a 3-4M hydrochloric acid solution with the same mass, heating to 80-90 ℃, hydrolyzing for 3-5h under the heat preservation condition, centrifuging for 5min at 1000rpm, and collecting precipitates to obtain a foaming agent;
step 4) conveying the combustion waste residue, the portland cement, the quartz sand, the fly ash, the triethanolamine, the calcium lignosulfonate and the foaming agent obtained in the step 3) into a stirrer according to the mass ratio of 100-90: 30-50: 10-20: 1-2: 2-3, and then adding water which is twice the mass of the combustion waste residue to mix and stir uniformly to obtain a mixture;
step 5) pouring the mixture obtained in the step 4) into a mold, performing compression molding through a press machine to obtain a brick blank, and putting the brick blank into a static curing chamber, wherein the static curing chamber is sealed and insulated for 50-55 ℃, and the static curing time is 2-3 hours; cutting the statically-cured brick blank into blocks by a cutting machine, and finally putting the blocks into a steam curing kettle for steam curing treatment to obtain the foamed brick building material;
the preparation method of the dehydrated microorganism activated sludge comprises the following steps: adding a purification flocculant into a sludge settling tank in a sewage treatment station to obtain settled sludge; sending the settled sludge into a dehydrator for dehydration treatment to obtain dehydrated microbial activated sludge; the purifying flocculant is one or a mixture of more than two of polyacrylamide, polyaluminium chloride, polyferric sulfate and diatomite;
in the step 5), the temperature of the autoclaved curing treatment is 150-;
in the step 2), the addition amount of the foamed coal accounts for 6-20% of the mass of the large amount of the dehydrated microbial activated sludge.
2. The method as claimed in claim 1, wherein in the step 5), the pressing strength is 20 to 22MPa, and the pressing time is 30 to 40 s.
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| CN101941825A (en) * | 2010-09-06 | 2011-01-12 | 广东绿由环保科技股份有限公司 | Environment-friendly brick produced from combustion slag of oil-bearing sludge reclaimed coal and manufacturing method thereof |
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| CN101921306B (en) * | 2009-12-29 | 2013-02-13 | 天津市裕川置业集团有限公司 | System and method for extracting microprotein from sludge through hydrolysis |
| CN102174070A (en) * | 2011-01-12 | 2011-09-07 | 文希元 | Method for preparing composite foam concrete foaming agent and soil modifying agent by extracting microprotein from sludge through utilizing red mud |
| JP5843329B2 (en) * | 2014-04-23 | 2016-01-13 | 株式会社大協組 | Method for producing foamed hydrothermal solidified product using incinerated ash as the main raw material |
| CN104496530A (en) * | 2014-12-15 | 2015-04-08 | 广西科技大学 | Flame-retardant composite foamed cement board and preparation method thereof |
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| CN101439920A (en) * | 2007-11-22 | 2009-05-27 | 天津市裕川置业集团有限公司 | Green treatment process for activated sludge |
| CN101941825A (en) * | 2010-09-06 | 2011-01-12 | 广东绿由环保科技股份有限公司 | Environment-friendly brick produced from combustion slag of oil-bearing sludge reclaimed coal and manufacturing method thereof |
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| Title |
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| 活性污泥蛋白质混凝土发泡剂的泡沫稳定性研究;李军伟;《新型建筑材料》;20101231;63-66 * |
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