CN1727292A - Method for integrating technique of damp drying sludge with technique for fermenting acrobic compost in high temperature - Google Patents
Method for integrating technique of damp drying sludge with technique for fermenting acrobic compost in high temperature Download PDFInfo
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- CN1727292A CN1727292A CNA2004100711334A CN200410071133A CN1727292A CN 1727292 A CN1727292 A CN 1727292A CN A2004100711334 A CNA2004100711334 A CN A2004100711334A CN 200410071133 A CN200410071133 A CN 200410071133A CN 1727292 A CN1727292 A CN 1727292A
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- 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
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- 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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Abstract
A process for treating the sludge generated by sewage treating plant, petrochemical plant, etc to obtain the compost includes semi-drying and high-temp aerobic fermenting. Its advantages are high automation level and low cost.
Description
Technical field
The present invention relates to environmental technology field, is that a kind of sewage sludge harmlessness, recycling treatment reach the method for utilizing again.
Background technology
At present, to life and industrial production sludge discharged, multiple treatment process is arranged, wherein, commonly used is high temperature aerobic composting technology and sludge drying technique.
The high temperature aerobic composting technology is to be that 80% dewatered sludge and about one times water ratio are that dewatered sludge, bacterial classification, additive (flyash) below 10% etc. mixes with water ratio, making mixed material water ratio is about 55% (it is 55% that high temperature aerobic composting requires the water ratio of material), by specific equipment material is evenly delivered in the horizontal fermentation cabin then, in fermentation cabin, make the abundant aerobic fermentation of material, it is evenly fermented and promote material by the stack turner stirring simultaneously to travel forward through forced ventilation.The aerobic fermentation process is the biological metabolism effect by the aerobic microorganism, makes that organism changes into the soil ulmin that is rich in plant nutrient in the mud, and the final metabolite of reaction is CO
2, H
2O and heat, a large amount of heats make material maintain continuous high temperature more than 60 ℃, reduce the water ratio of material, remove pathogenic agent, parasitic ovum and weed seed effectively, make mud reach minimizing, stabilization, innoxious, resource utilization purpose.
The water ratio of material has been reduced to about 25% behind 10 ~ 15 days compost fermentation, material part behind the compost fermentation is as bacterial classification backfill recycle, another part can be used as nutrition soil, owing to be rich in nutritive substances such as N, P, K in the mud, under the aerobic bacteria effect, stablize slaking, be easy to plant absorbing, be directly used in aspects such as afforestation, Revegetation, backfill soil.
The advantage of high temperature aerobic composting technology is: energy consumption is low, working cost is low, reduced investment, and the construction period is short.But following deficiency is arranged:
A, floor space are big, because the mud of water ratio 80% need add the dried mud greater than 1 times, make its water ratio adjust to 55%, to satisfy the requirement of high temperature aerobic composting.
B, suitable small sewage treatment plant, treatment capacity can be below 50 ton per day dewatered sludges.Level of automation is low, can not realize contactless, unattended.It is big for environment pollution to produce foul smell in the fermenting process, and odor removal addresses this problem on the needs.
Because it is there is certain defective in the high temperature aerobic composting technology, at present, many based on drying technique in municipal sludge is disposed abroad, its process is that the mud of water ratio 80% directly is cured to water ratio 10%, but this technological investment is big, and it is very high to consume energy, and has certain potential safety hazard.
Summary of the invention
The objective of the invention is provides a kind of half-driedization of mud and the integrated method of high temperature aerobic composting fermentation technique in order to overcome the deficiency of existing sludge treatment technology, but this method save energy, take up an area of little, the level of automation height, working cost is cheap, and safe and reliable.
For achieving the above object, technical solution of the present invention provides a kind of half-driedization of mud and high temperature aerobic composting fermentation technique integrated approach, after it earlier carries out half-driedization processing with drying technique to the mud of water ratio≤80%, again the mud after handling is done the high temperature aerobic composting fermentative processing, to obtain to utilize thing.
Described half-driedization of mud and high temperature aerobic composting fermentation technique integrated approach, it contains the following step:
A) mud that production unit is produced, its water ratio≤80% with the pre-mummification of the mode of heating evaporation, makes water ratio reach below 60% rapidly;
B) mix: mud, bacterial classification, backfill and the flyash of moisture≤60% are mixed, stir, make the moisture percentage in sewage sludge in the mixture reach 55%;
C) the gained mixture is done the high temperature aerobic composting fermentative processing, through 10 ~ 15 days compost fermentations, the water ratio of mixture was reduced to about 25%;
D) mud of finishing through harmless treatment, but granulation are done nutrition soil.
The characteristics of the inventive method are:
(1) energy consumption low (to handle 50 tons of moisture 80% mud day): half-driedization saved the heat energy more than 50% than complete mummification (moisture drop to 10% by 80%).
(2) take up an area of little: contrast complete mummification, half-driedization Device Host volume only quite fully the volume of mummification Device Host half.Contrast complete compost, hold half because half-driedization subtracts, compost more later on contrasts complete compost and takes up an area of and reduce half.
(3) working cost is low: be thermal source with steam: if 8bar steam per ton is evaluated is 40 yuan, then adjusts 1 ton of mud cost of half-driedization and is: 39.6 tons of steam * 40 ÷ 50=32 unit energy expenditures.Contrast 62.7 tons of steam of complete mummification * 40 ÷ 50=50 unit energy expenditure.(considering that temporarily electric power and other condition are the same)
(4) level of automation height: realize contactless automated operation, automatization, up-to-dateness height.
(5) applied widely: be fit to each big-and-middle-sized sewage work, not only can handle municipal sludge, can also handle organic waste such as petrochemical sludge, vinasse, treatment capacity can be at 40-600 ton per day dewatered sludge.
(5) safe: system's indirectly drying of safety, air requirement is low, avoids spontaneous combustion.Material is moisture in the half-driedization process does 60%, does not produce dust, can not blast.
Description of drawings
Fig. 1 is the graph of relation of sludge drying energy consumption and moisture percentage in sewage sludge;
Fig. 2 is half-driedization of mud of the present invention and the compoiste fermented process flow sheet of high temperature aerobic composting.
Embodiment
The expert has done a large amount of analysis and research and experiment in this respect both at home and abroad for many years, and wherein the energy that mud drying process consumed to the different water cut rate has carried out comparative analysis, has drawn the relation curve of sludge drying energy consumption and moisture percentage in sewage sludge, sees Fig. 1.
By the relation curve of Fig. 1 as can be known, to make water ratio drop to 60% this section institute consumed energy by 80% little through adding heat drying for dewatered sludge, and it is mainly removed is free-water in the mud; Same water ratio is also little at the mummification of continuation below 35% consumed energy, and this energy expenditure of two sections is substantially near theoretical value; Mud is the plastic stage of mud between water ratio 35%-60%, the similar glue of the fluid characteristics of this stage mud, and gluey, thickness are difficult to dispose, and its mummification consumed energy is sharply increased, and are difficult to mummification.According to above-mentioned characteristic, dewatered sludge will be avoided the mud plastic stage.Make full use of the sludge drying characteristic, try one's best at water ratio more than 60% 35% following mummification.Water ratio be between the 35%-60% mummification power consumption be about water ratio 60% or more with 2.5 times of 35% following mummification energy consumption; So we adopt pre-mummification technology to municipal sludge, make the dewatered sludge water ratio reduce to 60% by 80%, saved energy consumption so greatly.
Half-driedization of mud of the present invention and high temperature aerobic composting fermentation technique integrated approach, be with drying technique the mud of water ratio≤80% to be handled earlier, water ratio is reduced to below 60%, again the mud after handling is done the high temperature aerobic composting fermentative processing, to obtain to utilize thing.Its process is:
Adopt the minimum stage (water ratio is by 80% ~ 60%) of energy consumption in the mud heating drying process, make moisture percentage in sewage sludge reduce to 60% by 80%, mix with the part bacterial classification again, make moisture percentage in sewage sludge adjust to 55%, the mud of water ratio 55% just in time is fit to the condition of sludge high temperature aerobic compost fermentation, through 10 ~ 15 days compost fermentations, the water ratio of material was reduced to about 25%; In this process, some poisonous and harmful germs are killed in the mud, organic decomposition fully under the aerobic bacteria effect.Material part behind the compost fermentation is as bacterial classification backfill recycle, another part can be used as nutrition soil, owing to be rich in nutritive substances such as N, P, K in the mud, stablizes slaking under the aerobic bacteria effect, be easy to plant absorbing, be directly used in afforestation, Revegetation, backfill soil etc.
The technical process of half-driedization of mud of the present invention and high temperature aerobic composting fermentation technique integrated approach is seen shown in Figure 2ly, contains the following step:
A) mud that production unit is produced, its water ratio is 65～80%, with the pre-mummification of the mode of spontaneous evaporation, makes water ratio reach 60%;
B) mix: the mud with moisture 60%, bacterial classification, backfill and flyash mix, and stir, and make the moisture percentage in sewage sludge in the mixture reach 55%;
C) the gained mixture is done the high temperature aerobic composting fermentative processing, through 10 ~ 15 days compost fermentations, the water ratio of mixture was reduced to about 25%;
D) sludge treatment is finished, but nutrition soil is done in granulation, is used for agriculture production or afforestation.
Claims (2)
1. half-driedization of mud and high temperature aerobic composting fermentation technique integrated approach, it is characterized in that: earlier the mud of water ratio≤80% is carried out half-driedization processing with drying technique, again the mud after handling is done the high temperature aerobic composting fermentative processing, to obtain to utilize thing.
2. half-driedization of mud as claimed in claim 1 and high temperature aerobic composting fermentation technique integrated approach is characterized in that: contain the following step:
A) mud that production unit is produced, its water ratio≤80% with the pre-mummification of the mode of heating evaporation, makes water ratio reach 55 ~ 60%;
B) mix: the mud with moisture 55 ~ 60%, bacterial classification, backfill and flyash mix, and stir, and make the moisture percentage in sewage sludge in the mixture reach 50 ~ 55%;
C) the gained mixture is done the high temperature aerobic composting fermentative processing, through 10 ~ 15 days compost fermentations, the water ratio of mixture reduced to 24～26%;
D) mud of finishing through harmless treatment, but granulation are done nutrition soil.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2004100711334A CN1727292A (en) | 2004-07-29 | 2004-07-29 | Method for integrating technique of damp drying sludge with technique for fermenting acrobic compost in high temperature |
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| CNA2004100711334A CN1727292A (en) | 2004-07-29 | 2004-07-29 | Method for integrating technique of damp drying sludge with technique for fermenting acrobic compost in high temperature |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428955B (en) * | 2007-11-06 | 2013-01-23 | 宋乾武 | Mechanical deep dehydration, biological desiccation and reclamation combined treatment process for sewage sludge |
| CN102936159A (en) * | 2012-11-01 | 2013-02-20 | 青岛农业大学 | Method for producing compost by using beer production waste |
| CN103496834A (en) * | 2013-09-30 | 2014-01-08 | 河南金谷实业发展有限公司 | Dehydration method for reducing water content of sludge in microbial fermentation way |
| CN104370593A (en) * | 2014-10-22 | 2015-02-25 | 浦华环保有限公司 | Method for preparing nutrient soil by performing mixed aerobic fermentation on sewage plant dewatered sludge and fly ash |
| CN111875425A (en) * | 2020-06-17 | 2020-11-03 | 上海仁创环境科技有限公司 | Treatment method and device for combining solar sludge drying with sludge composting |
| CN112638830A (en) * | 2020-09-18 | 2021-04-09 | 石文政 | Treatment method and device for combining solar sludge drying with sludge composting |
| CN113830990A (en) * | 2021-10-08 | 2021-12-24 | 中车环境科技有限公司 | Sludge heat energy and biological energy integrated drying and dewatering system and method |
| CN114890641A (en) * | 2022-05-27 | 2022-08-12 | 广西鸿生源环保股份有限公司 | Harmless recycling treatment method for sludge and application of treated sludge |
-
2004
- 2004-07-29 CN CNA2004100711334A patent/CN1727292A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428955B (en) * | 2007-11-06 | 2013-01-23 | 宋乾武 | Mechanical deep dehydration, biological desiccation and reclamation combined treatment process for sewage sludge |
| CN102936159A (en) * | 2012-11-01 | 2013-02-20 | 青岛农业大学 | Method for producing compost by using beer production waste |
| CN102936159B (en) * | 2012-11-01 | 2014-07-30 | 青岛农业大学 | Method for producing compost by using beer production waste |
| CN103496834A (en) * | 2013-09-30 | 2014-01-08 | 河南金谷实业发展有限公司 | Dehydration method for reducing water content of sludge in microbial fermentation way |
| CN103496834B (en) * | 2013-09-30 | 2015-09-09 | 河南金谷实业发展有限公司 | A kind of fermentable that utilizes is to reduce the dewatering of moisture percentage in sewage sludge |
| CN104370593A (en) * | 2014-10-22 | 2015-02-25 | 浦华环保有限公司 | Method for preparing nutrient soil by performing mixed aerobic fermentation on sewage plant dewatered sludge and fly ash |
| CN111875425A (en) * | 2020-06-17 | 2020-11-03 | 上海仁创环境科技有限公司 | Treatment method and device for combining solar sludge drying with sludge composting |
| CN112638830A (en) * | 2020-09-18 | 2021-04-09 | 石文政 | Treatment method and device for combining solar sludge drying with sludge composting |
| CN113830990A (en) * | 2021-10-08 | 2021-12-24 | 中车环境科技有限公司 | Sludge heat energy and biological energy integrated drying and dewatering system and method |
| CN114890641A (en) * | 2022-05-27 | 2022-08-12 | 广西鸿生源环保股份有限公司 | Harmless recycling treatment method for sludge and application of treated sludge |
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