CN102153266A - Method for treating sewage sludge with diatom - Google Patents

Method for treating sewage sludge with diatom Download PDF

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Publication number
CN102153266A
CN102153266A CN201110045032XA CN201110045032A CN102153266A CN 102153266 A CN102153266 A CN 102153266A CN 201110045032X A CN201110045032X A CN 201110045032XA CN 201110045032 A CN201110045032 A CN 201110045032A CN 102153266 A CN102153266 A CN 102153266A
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China
Prior art keywords
diatom
sewage sludge
sludge
water ratio
water content
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Pending
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CN201110045032XA
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Chinese (zh)
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韩承宏
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韩承宏
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Priority to CN201110045032XA priority Critical patent/CN102153266A/en
Publication of CN102153266A publication Critical patent/CN102153266A/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
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/10Biofuels, e.g. bio-diesel
    • 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
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel
    • 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
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/133Renewable energy sources, e.g. sunlight

Abstract

The invention relates to a method for treating sewage sludge with diatom, which comprises the following steps: adding lime slurry into a sludge/water mixture of which the water content is 85-98%, thereby regulating the pH value to above 7; adding 5-10% of diatom (the wood dust granularity is not greater than 100 micrometers), and evenly stirring; pumping the mixture into a plate-and-frame type filter press to carry out mechanical pressing and dewatering until the water content reaches 50-60%, and discharging; and reducing the water content to below 25% by sun drying or natural air drying for cyclic utilization, or using the treated sludge together with an excess heat drying machine. By using the wood dust as a filter aid, the method for treating sewage sludge has the advantages of energy saving and environmental protection, is economical and effective, and has favorable popularization effect.

Description

A kind of method with the diatom sewage sludge
[technical field]
The present invention relates to a kind of treatment process of sewage sludge, be specifically related to a kind of technical field of using diatom as the treatment process of the sewage sludge of flocculating aids.
[background technology]
In order to administer the pollution of sewage to environment, the sewage treatment facility that all trades and professions have all been set up the different process route to be to realize qualified discharge, is that the sewage treatment facility of the processing organic wastewater of core process (being commonly called as " anaerobic and aerobic " treatment process) has occupied lion's share with " microbiological deterioration " wherein.This technology has the characteristics that treatment of Organic Wastewater is up to standard that are easy to, but in treating processes, can produce a large amount of mud, according to the service experience of beer enterprise, 2~3 tons of water ratio of one ton of COD of every explanation (chemical oxygen demand (COD)) meeting generation reach the mud (the different sludge outputs of industry are slightly variant) about 85%.At present, these mud major parts have been taked landfill disposal, have caused second environmental pollution.
The reason that causes this secondary pollution is because this mud is actually deactivated anaerobism or aerobic bacteria, and its moisture mainly is present in the cell of bacterium and is not easy to take off.Widely used at present " belt filter press " can only be taken off external free water content, being present in intracellular moisture can't remove, even so the water ratio of mud adopts other powerful mechanical expression (using plate and frame mechanism filter-pressing machine has been very common technology to material dewatering), exposure in sunshine or natural air drying method still can't further reduce water ratio still up to 75~85% (industry different water cut rate is also different) after the press filtration of process belt.
But this mud is not refuse, per kilogram contains the calorific value (the different calorific values of industry are variant) of 1000~2000 much cards (4000~8000 KJ (kilojoule)) in its over dry material, also contain several organic matter and nitrogen phosphorus potassium to tens percentage points, if its moisture is reduced to below 25%, then both can have done fuel and burn.Also can do the aggregate of organic composite fertilizer.The sole cause that influence is used be water ratio surpass 25% just the extra energy of needs evaporate redundant moisture, uneconomical economically.
In order further to remove intracellular moisture, water ratio is dropped to utilizable economically degree, mainly contain three kinds of technology at present:
First kind of technology is directly with its oven dry with the way that heats, mainly contain high temperature oil heating, drying, fluidized-bed and modes such as ebullated bed oven dry and cylinder oven dry, these technology have obtained using widely in the manufacturing enterprise of the discharging that has surplus heat (for example boiler exhaust gas or Industrial Stoves exhaust), can drop to water ratio below 10%.The shortcoming of this technology has two: the one, and power consumption is very high, but can not (for example municipal sewage plant) use in the place that does not have waste heat.
Second kind of technology is to use the mode of mechanism filter-pressing with moisture removal again after adopting the way of adding chemical agent that cell walls is destroyed, water ratio can be dropped to below 30%, this is maximum technology of studying at present, there be not the utilizable place of waste heat to use on a small quantity, its shortcoming is the chemical agent costliness, if there is not government subsidy to lose money.
The third technology is that first mud with water ratio about 85% is heated to certain temperature fermentation for some time, add and carry out mechanism filter-pressing or oven dry again after a spot of chemical agent thoroughly destroys cell walls, this technology is commonly used abroad, domestic use rarer, major cause is that initial cost is too big, move bad control, and energy remains loss.
[summary of the invention]
For solving above deficiency, the invention provides a kind of method and sludge water content can be reduced to the degree that not lose money economically with the diatom sewage sludge, utilize and the elimination secondary environmental pollution so that it is turned waste into wealth, these method energy-conserving and environment-protective have very strong practicality.
The technical solution adopted in the present invention is: a kind of method with the diatom sewage sludge is characterized in that earlier the interpolation lime white is adjusted to pH value more than 7 in the mud mixture of water ratio 85~98%, add again after 5~10% diatom stirs, pump into and carry out the mechanical expression dehydration in the plate and frame(type)filter press, moisture is squeezed 50~60% to be drawn off, can adopt the mode of exposure in sunshine or natural air drying further water ratio to be dropped to then and carry out recycle below 25%, also can unite use with the waste heat dryer.
A kind of its feature of method with the diatom sewage sludge, described mud mixture are alkalescence and do not need to add lime white adjustment pH value.
A kind of its feature of method with the diatom sewage sludge, described diatom granularity ≯ 100 microns.
Ultimate principle of the present invention is: the diatom particulate can squeeze most mud cell wallss broken in expressing process by mechanical pressure, diatom can also play the effect of filter bridge simultaneously, makes the interior moisture of born of the same parents become free water content and by filter cloth it is extruded.Because diatom is a kind of inorganic mineral of cheapness, is easy to obtain, thereby has substituted the drying mode of highly energy-consuming and expensive chemical mode.Under the identical situation of dehydration rate, but use present method than waste heat furnace drying method energy efficient 90%; Than chemical process cost-saved 80%; Can save investment 70% than thermophilic fermentation method.
Special benefits of the present invention is: in the industry that has waste diatomite to produce (for example beer industry etc.), the waste diatomite that produces in the production process (also needing landfill usually) can use equally and effect identical.
In the utilizable place that has surplus heat, but present method is united use than using waste heat furnace drying method energy efficient about 50% separately with the waste heat furnace drying method.
Do not having the utilizable place of waste heat (for example municipal sewage plant), using present method earlier sludge water content to be squeezed about 50%,, moisture can dropped to below 25% equally again through exposure in sunshine or natural air drying.
Diatom is a kind of nontoxic material, and admixture is used as fuel in mud still be that the compoiste fertilizer aggregate is all without any detrimentally affect.
Beneficial effect of the present invention: adopt the sewage sludge treatment method energy-conserving and environment-protective of diatom as flocculating aids, economical and effective has very strong promotion effect.
Further understand feature of the present invention and technology contents for making, see embodiment for details, yet appended embodiment is only for reference and explanation usefulness, and the present invention is limited.
[embodiment]
With specific embodiment the present invention is elaborated below:
Embodiment 1, earlier the interpolation lime white is adjusted to pH value more than 7 in the mud mixture of water ratio 85~98%, add again after 5~10% diatom (diatom granularity ≯ 100 micron) stirs, pump into and carry out the mechanical expression dehydration in the plate and frame(type)filter press, moisture is squeezed 50~60% draw off, can adopt the exposure in sunshine mode further water ratio to be dropped to then and carry out recycle below 25%.
Embodiment 2, earlier the interpolation lime white is adjusted to pH value more than 7 in the mud mixture of water ratio 85~98%, add again after 5~10% diatom (diatom granularity ≯ 100 micron) stirs, pump into and carry out the mechanical expression dehydration in the plate and frame(type)filter press, moisture is squeezed 50~60% draw off, can adopt the mode of natural air drying further water ratio to be dropped to then and carry out recycle below 25%.
Embodiment 3, earlier the interpolation lime white is adjusted to pH value more than 7 in the mud mixture of water ratio 85~98%, add again after 5~10% diatom (diatom granularity ≯ 100 micron) stirs, pump into and carry out the mechanical expression dehydration in the plate and frame(type)filter press, moisture is squeezed 50~60% draw off, can adopt the waste heat dryer further water ratio to be dropped to then and carry out recycle below 25%.
That adopts that present method sewage sludge handles is applied to Yanjing Beer's detected result:
1, Product Quality Supervision ﹠ Testing Office's survey report (test basis GB 18877-2002 " organic-inorganic complex fertilizer ") (water ratio about 20%)
2, Product Quality Supervision ﹠ Testing Office's survey report (test basis GB 18877-2002 " organic-inorganic complex fertilizer ") (water ratio about 85%)
Adopt the sewage sludge treatment method energy-conserving and environment-protective of diatom as flocculating aids, economical and effective has very strong promotion effect.
Yet the preferable feasible embodiment of above-mentioned only the present invention, non-so limitation protection domain of the present invention is done various distortion or is applied mechanically all within this technical scheme protection domain according to the foregoing description.

Claims (3)

1. the method with the diatom sewage sludge is characterized in that earlier the interpolation lime white is adjusted to pH value more than 7 in the mud mixture of water ratio 85~98%, add again after 5~10% diatom stirs, pump into and carry out the mechanical expression dehydration in the plate and frame(type)filter press, moisture is squeezed 50~60% to be drawn off, can adopt the mode of exposure in sunshine or natural air drying further water ratio to be dropped to then and carry out recycle below 25%, also can unite use with the waste heat dryer.
2. a kind of its feature of method with the diatom sewage sludge according to claim 1, described mud mixture are alkalescence and do not need to add lime white adjustment pH value.
3. a kind of its feature of method according to claim 1 with the diatom sewage sludge, described diatom granularity ≯ 100 microns.
CN201110045032XA 2011-02-24 2011-02-24 Method for treating sewage sludge with diatom Pending CN102153266A (en)

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CN201110045032XA CN102153266A (en) 2011-02-24 2011-02-24 Method for treating sewage sludge with diatom

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515457A (en) * 2011-12-13 2012-06-27 中国科学院沈阳应用生态研究所 Rapid air-drying method of residual activated sludge
CN102533379A (en) * 2011-12-13 2012-07-04 苏韶华 Sludge synthetic fuel
EP2789598A1 (en) 2013-04-12 2014-10-15 Manios, Thrassyvoulos Process for obtaining compost from wastewaters produced by olive oil mills
CN106186635A (en) * 2016-09-05 2016-12-07 东莞市圣茵环境科技有限公司 A kind of Beer Sludge works in coordination with beer waste liquid Deep dehydration treatment method
CN108793676A (en) * 2018-05-03 2018-11-13 中国科学院深圳先进技术研究院 A kind of the composite highly effective dewatering and system of sludge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5748999B2 (en) * 1977-02-22 1982-10-19
JPH08182999A (en) * 1994-12-28 1996-07-16 Chichibu Onoda Cement Corp Treatment of sewerage sludge and sewerage sludge-treated material
JP2004209385A (en) * 2002-12-27 2004-07-29 Mitsui Mining & Smelting Co Ltd Sludge filter aid and method for dehydrating sludge
CN101691272A (en) * 2009-10-01 2010-04-07 厦门水务集团有限公司 Sludge dewatering method
CN101857353A (en) * 2010-07-02 2010-10-13 胶南市易通热电有限责任公司 Processing method for sludge with high water content
CN101963357A (en) * 2010-09-19 2011-02-02 河北景明循环产业股份有限公司 Method for generating power by using sludge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5748999B2 (en) * 1977-02-22 1982-10-19
JPH08182999A (en) * 1994-12-28 1996-07-16 Chichibu Onoda Cement Corp Treatment of sewerage sludge and sewerage sludge-treated material
JP2004209385A (en) * 2002-12-27 2004-07-29 Mitsui Mining & Smelting Co Ltd Sludge filter aid and method for dehydrating sludge
CN101691272A (en) * 2009-10-01 2010-04-07 厦门水务集团有限公司 Sludge dewatering method
CN101857353A (en) * 2010-07-02 2010-10-13 胶南市易通热电有限责任公司 Processing method for sludge with high water content
CN101963357A (en) * 2010-09-19 2011-02-02 河北景明循环产业股份有限公司 Method for generating power by using sludge

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
师荣梅等: "粉煤灰和硅藻土对昆明污水厂污泥的脱水研究", 《昆明理工大学学报(理工版)》, vol. 33, no. 5, 31 October 2008 (2008-10-31) *
朱经和: "珍珠岩助滤剂在污泥脱水中的应用", 《石油化工环境保护》, no. 3, 31 December 1987 (1987-12-31) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515457A (en) * 2011-12-13 2012-06-27 中国科学院沈阳应用生态研究所 Rapid air-drying method of residual activated sludge
CN102533379A (en) * 2011-12-13 2012-07-04 苏韶华 Sludge synthetic fuel
EP2789598A1 (en) 2013-04-12 2014-10-15 Manios, Thrassyvoulos Process for obtaining compost from wastewaters produced by olive oil mills
CN106186635A (en) * 2016-09-05 2016-12-07 东莞市圣茵环境科技有限公司 A kind of Beer Sludge works in coordination with beer waste liquid Deep dehydration treatment method
CN108793676A (en) * 2018-05-03 2018-11-13 中国科学院深圳先进技术研究院 A kind of the composite highly effective dewatering and system of sludge

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Application publication date: 20110817