CN105923944A - Method for harmless treatment of municipal sludge - Google Patents

Method for harmless treatment of municipal sludge Download PDF

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Publication number
CN105923944A
CN105923944A CN201610301621.2A CN201610301621A CN105923944A CN 105923944 A CN105923944 A CN 105923944A CN 201610301621 A CN201610301621 A CN 201610301621A CN 105923944 A CN105923944 A CN 105923944A
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China
Prior art keywords
sludge
municipal sludge
heavy metal
solid phase
mass fraction
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CN201610301621.2A
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Chinese (zh)
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毛保庚
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Individual
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Priority to CN201610301621.2A priority Critical patent/CN105923944A/en
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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
    • C02F11/004—Sludge detoxification
    • 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
    • C02F11/02—Biological treatment
    • 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
    • C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
    • 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
    • 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
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F5/00—Fertilisers from distillery wastes, molasses, vinasses, sugar plant or similar wastes or residues, e.g. from waste originating from industrial processing of raw material of agricultural origin or derived products thereof
    • C05F5/006—Waste from chemical processing of material, e.g. diestillation, roasting, cooking
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/38—Organic compounds containing nitrogen
    • 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
    • C02F2303/04—Disinfection
    • 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
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • 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
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/20—Sludge processing
    • 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
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
    • 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
    • Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Molecular Biology (AREA)
  • Health & Medical Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Botany (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • Biotechnology (AREA)
  • Microbiology (AREA)
  • Fertilizers (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention relates to a method for harmless treatment of municipal sludge and belongs to the technical field of resource and environment protection. According to the method, municipal sludge is subjected to pyrolysis, heavy metal chelation and separation and resource recovery, so that pathogen and toxic organic substances in municipal sludge are removed, heavy metal is recovered through membrane separation after being separated along with aqueous phase, and organic fertilizer is obtained after solid-phase sludge is subjected to fermentation composting. The method not only can remove harmful substances, but also can recycle residual substances in sludge. Compared with existing direct stacking methods, the method has the advantages that no influence is caused to the environment basically, cleanness of soil and the water and soil environment can be well maintained, and harmless and resourceful treatment of municipal sludge is realized in the true sense.

Description

A kind of method for innocent treatment of municipal sludge
Technical field
The invention belongs to protection of natural resources and environment technical field, be specifically related to the innoxious of a kind of municipal sludge Processing method.
Background technology
Along with the generation amount of being continuously increased of the size of population, house refuse and feces is increasing, these House refuse and feces would generally obtain a part of fertilizer through process, remaining cannot be obtained by Waste material is referred to as municipal sludge, and untreated carrying out stacks or fill, and does not only take up substantial amounts of soil, Under field conditions (factors), can be to soil, subsoil water, surface water body and crops through rain and diafiltration Causing secondary pollution, the heavy metal in mud is difficult to be biodegradable after entering water body and soil, and can Being enriched with by biological chain, be detrimental to health, the method for the Treatment of Sludge that presently, there are is primarily directed to The process that industrial waste is carried out, can add other compounds to the harmful substance in waste material in processing procedure React, be not suitable in the process of municipal sludge, therefore, how municipal sludge is carried out harmless Change the Main Topics being treated as this field.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, it is provided that a kind of municipal sludge innoxious Processing method.
The concrete technical scheme of the present invention is:
A kind of method for innocent treatment of municipal sludge, key point is, described processing method include with Lower step:
A, pyrolysis
Being placed in by municipal sludge in the high temperature anaerobic environment of 180-210 DEG C, the retention time exists 5-20min, obtains pyrolysis material；
B, heavy metal chelating and separation
In pyrolysis material, add water solublity heavy metal chelant, then carry out processed by extruding, Obtaining solid phase sludge and heavy metal containing sewage, the water content of solid phase sludge is not higher than 60%, solid phase sludge In content of beary metal as follows: arsenic and mass fraction≤0.006 ‰ of compound (in terms of AS) thereof, Cadmium and mass fraction≤0.001 ‰ of compound (in terms of Cd) thereof, lead and compound thereof (with Pb count) mass fraction≤0.015 ‰, the mass fraction of chromium and compound (in terms of Cr) ≤ 0.06 ‰, mass fraction≤0.0006 ‰ of mercury and mercuric compounds (in terms of Hg)；
C, resource reclaim
By heavy metal containing sewage by membrane separating method isolated heavy metal, solid phase sludge is sent out through compost Ferment forms fertilizer.
In described step A, municipal sludge is placed in 190 DEG C of high temperature without in air oxygen-free environment, protects The time of holding is 15min.
In described step B, after dehydration, the water content of solid phase sludge is 55%.
In described step B, metal-chelator selects sodium ethylene diamine tetracetate.
In described step C, described membrane separating method is reverse osmosis, ultrafiltration or microfiltration.
Described solid phase sludge compost fermentation is aerobic fermentation, at air humidity 55%-60%, pH value is 7.6-8.7, carbon-nitrogen ratio are (20-35): 1, ventilation is 1.5-2.0m3Under the conditions of/(min t) Fermenting, obtain scoriform fertilizer after fermentation ends, in fertilizer, content of organics is 40%-60%, particle diameter For 1.3-7.6mm.
The invention has the beneficial effects as follows: municipal sludge is passed through pyrolysis by the method in the present invention so that its In polyacrylamide be broken down into harmless small organic molecule and inorganic matter, parasite and pathogen etc. Harmful organism is killed, and heavy metal chelating separates and in mechanical presses dehydration, heavy metal is with aqueous phase By separation removal, aqueous phase obtains heavy metal for recycling through membrane separation technique, solid phase sludge simultaneously Middle because rich in required nutrients of growth of microorganism such as carbon source, nitrogen source, phosphorus elements, being formed organic through compost fermentation Fertilizer, for production estimation, gardening and forestry plantation aspect, this method is removing the mistake of harmful substance Journey does not produce other poisonous and harmful substances, and can reclaim and obtain heavy metal and Organic Fertilizer Resources, very Just realizing innoxious, recycling treatment.
Detailed description of the invention
The present invention relates to the method for innocent treatment of a kind of municipal sludge, the method for house refuse and In the most remaining municipal sludge of feces, by the volatilizable hazardous compound in this municipal sludge Carrying out high temperature elimination, harmful levels of pathogens is destroyed the most therewith, and recovery obtains heavy metal and fertilizer, real Existing innoxious, resource.
Specific embodiment, the method for innocent treatment of municipal sludge specifically includes following steps:
A, pyrolysis
Municipal sludge is placed in the high temperature anaerobic environment of 190 DEG C, keeps 15min, municipal sludge In common are the Organic substance of murder by poisoning and be rapidly decomposed into the small organic molecule of nonhazardous or even inorganic Thing, such as polyacrylamide, can kill substantial amounts of parasite, disease in mud simultaneously during this The harmful organisms such as substance, obtain pyrolysis material after pyrolysis；
B, heavy metal chelating and separation
In pyrolysis material, add water solublity heavy metal chelant sodium ethylene diamine tetracetate, make liquid organic Heavy metal in thing good combination therewith, then carry out processed by extruding, heavy metal is with water Departed from, obtained solid phase sludge and heavy metal containing sewage, water content in detection solid phase sludge and Content of beary metal, the water content of solid phase sludge is not higher than 60%, the Heavy Metals in solid phase sludge Content is as follows: arsenic and mass fraction≤0.006 ‰ of compound (in terms of AS) thereof, cadmium and Mass fraction≤0.001 ‰ of compound (in terms of Cd), lead and compound (in terms of pb) thereof Mass fraction≤0.015 ‰, the mass fraction of chromium and compound (in terms of Cr)≤ 0.06 ‰, mass fraction≤0.0006 ‰ of mercury and mercuric compounds (in terms of Hg), above heavy Tenor meets national for the requirement of content of beary metal in fertilizer, reclaims for solid phase sludge Lay the foundation to organic fertilizer.
C, resource reclaim
Municipal sludge after pyrolysis, chelation treatment and extrusion dehydration, polyacrylamide therein, disease Primary objects etc. are effectively removed, and are separated by reverse osmosis membrane separation method by heavy metal containing sewage Obtaining heavy metal, heavy metal can be recycled, and makes solid phase sludge through mechanical presses dehydration Moisture content is down to 55% by original about 85%, solid phase sludge carries out compost fermentation and forms fertilizer, Compost fermentation is aerobic fermentation, air humidity 58%, pH value be 8.0, carbon-nitrogen ratio be 30:1, Ventilation is 1.8m3Ferment under the conditions of/(min t), obtain scoriform after fermentation ends fertile Material, in fertilizer, content of organics is 50%, particle diameter at about 4.5mm, in this fertilizer rich in carbon, The required nutrient of the growth of microorganism such as nitrogen, phosphorus.
Virulent Organic substance is decomposed into inorganic matter or the Organic substance of nonhazardous by the present invention by pyrolysis, And in high temperature, Pathogenic organisms is killed, depart from aqueous phase after heavy metal chelating, can either realize Heavy metal separates with solid phase sludge, and the recycling for heavy metal provides condition, due to solid phase again Heavy Metal Level In Sludge meets national standard, again rich in nutrients such as carbon source, nitrogen source, phosphorus elements, for entering One step compost generates fertilizer and creates condition, and the method had both achieved the innoxious of mud, again could Useful resources in mud is recycled, has agreed with when prospective adaptation environmental resource bearing capacity Road for development.

Claims (6)

1. the method for innocent treatment of a municipal sludge, it is characterised in that described processing method bag Include following steps:
A, pyrolysis
Being placed in by municipal sludge in the high temperature anaerobic environment of 180-210 DEG C, the retention time exists 5-20min, obtains pyrolysis material；
B, heavy metal chelating and separation
In pyrolysis material, add water solublity heavy metal chelant, then carry out processed by extruding, Obtaining solid phase sludge and heavy metal containing sewage, the water content of solid phase sludge is not higher than 60%, solid phase sludge In content of beary metal as follows: arsenic and mass fraction≤0.006 ‰ of compound (in terms of AS) thereof, Cadmium and mass fraction≤0.001 ‰ of compound (in terms of Cd) thereof, lead and compound thereof (with Pb count) mass fraction≤0.015 ‰, the mass fraction of chromium and compound (in terms of Cr) ≤ 0.06 ‰, mass fraction≤0.0006 ‰ of mercury and mercuric compounds (in terms of Hg)；
C, resource reclaim
By heavy metal containing sewage by membrane separating method isolated heavy metal, solid phase sludge is sent out through compost Ferment forms fertilizer.
The method for innocent treatment of a kind of municipal sludge the most according to claim 1, its feature exists In: in described step A, municipal sludge is placed in 190 DEG C of high temperature without in air oxygen-free environment, keeps Time is 15min.
The method for innocent treatment of a kind of municipal sludge the most according to claim 1, its feature exists In: in described step B, after dehydration, the water content of solid phase sludge is 55%.
The method for innocent treatment of a kind of municipal sludge the most according to claim 1, its feature exists In: in described step B, metal-chelator selects sodium ethylene diamine tetracetate.
The method for innocent treatment of a kind of municipal sludge the most according to claim 1, its feature exists In: in described step C, described membrane separating method is reverse osmosis, ultrafiltration or microfiltration.
The method for innocent treatment of a kind of municipal sludge the most according to claim 1, its feature exists In: described solid phase sludge compost fermentation is aerobic fermentation, at air humidity 55%-60%, pH value is 7.6-8.7, carbon-nitrogen ratio are (20-35): 1, ventilation is 1.5-2.0m3Under the conditions of/(min t) Fermenting, obtain scoriform fertilizer after fermentation ends, in fertilizer, content of organics is 40%-60%, particle diameter For 1.3-7.6mm.
CN201610301621.2A 2016-05-09 2016-05-09 Method for harmless treatment of municipal sludge Pending CN105923944A (en)

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CN201610301621.2A CN105923944A (en) 2016-05-09 2016-05-09 Method for harmless treatment of municipal sludge

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110194572A (en) * 2019-06-13 2019-09-03 吉林省博任环保科技有限公司 A kind of method of polyacrylamide in degradation domestic sludge
CN110963656A (en) * 2019-12-19 2020-04-07 韶关市欧姆机电设备有限公司 Sludge fermentation device with helical structure
WO2023039648A1 (en) * 2021-09-20 2023-03-23 Acef S.A. Sewage waste treatment method using polyhexamethylene guanidine and polyhexamethylene biguanide and production of biosolids for agricultural use

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS551831A (en) * 1978-06-19 1980-01-09 Kirin Brewery Co Ltd Excess sludge treating method
CN101081717A (en) * 2007-04-10 2007-12-05 杨培根 Method for handling heavy metal in sludge
CN101219838A (en) * 2008-01-25 2008-07-16 北京交通大学 Method for processing heavy metal industrial waste water with low concentration
CN101863600A (en) * 2009-04-16 2010-10-20 刘文治 Method for removing heavy metals from activated sludge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS551831A (en) * 1978-06-19 1980-01-09 Kirin Brewery Co Ltd Excess sludge treating method
CN101081717A (en) * 2007-04-10 2007-12-05 杨培根 Method for handling heavy metal in sludge
CN101219838A (en) * 2008-01-25 2008-07-16 北京交通大学 Method for processing heavy metal industrial waste water with low concentration
CN101863600A (en) * 2009-04-16 2010-10-20 刘文治 Method for removing heavy metals from activated sludge

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李闻欣: "《皮革环保工程概论》", 31 August 2015, 中国轻工业出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110194572A (en) * 2019-06-13 2019-09-03 吉林省博任环保科技有限公司 A kind of method of polyacrylamide in degradation domestic sludge
CN110963656A (en) * 2019-12-19 2020-04-07 韶关市欧姆机电设备有限公司 Sludge fermentation device with helical structure
WO2023039648A1 (en) * 2021-09-20 2023-03-23 Acef S.A. Sewage waste treatment method using polyhexamethylene guanidine and polyhexamethylene biguanide and production of biosolids for agricultural use

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Application publication date: 20160907