CN109574435B - Method for using solidified sludge as landfill garbage - Google Patents
Method for using solidified sludge as landfill garbage Download PDFInfo
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- CN109574435B CN109574435B CN201811602662.0A CN201811602662A CN109574435B CN 109574435 B CN109574435 B CN 109574435B CN 201811602662 A CN201811602662 A CN 201811602662A CN 109574435 B CN109574435 B CN 109574435B
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- sludge
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- sodium carboxymethylcellulose
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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
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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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
Abstract
The invention discloses a method for solidifying sludge as landfill garbage, which comprises the steps of sequentially adding sodium carboxymethylcellulose I into the sludge, then adding fulvic acid and sodium carboxymethylcellulose II, adding bacillus amyloliquefaciens and peptone, then adding sodium carboxymethylcellulose III and lactobacillus acidophilus into the sludge, finally adding sepiolite powder under the condition of stirring, spreading active carbon on the surface of the sludge, standing for several hours, and filtering out liquid, thus completing the treatment of the sludge. The invention specially limits the adding time of each component, strictly limits the treatment time of each stage, reduces the water content to below 28 percent, has no pollution to the environment and no odor release, and improves the utilization value of the treated sludge after the farmland dry materials are thoroughly decomposed 50 days after the landfill. The treatment method has the advantages of simple raw materials, easy operation control, low cost, high treatment efficiency and the like.
Description
Technical Field
The invention relates to a method for solidifying sludge as landfill garbage, belonging to the technical field of sludge treatment.
Background
At present, with the continuous promotion of the urbanization process and the continuous increase of the concern of people on environmental protection, sludge generated in the urban domestic sewage treatment process and the disposal thereof become a more and more serious problem. In recent years, although China has carried out a lot of work on the aspect of sludge treatment, the sludge treatment capacity of China is very weak due to economic and technical reasons, and the main manifestation is that: 1. the sludge treatment rate is extremely low; 2. the development of heavy water light mud and sludge treatment is lagged; 3. the technical route is to carry out hard cover; 4. supervision is difficult; 5. the investment is low and the policy is not sound.
The management and technical defects related to sewage treatment enable a large amount of urban sludge to be temporarily stacked, so that a large number of large cities have sludge enclosing and begin to spread to medium and small cities, a large amount of accumulated sludge occupies a large area of land, harmful components such as heavy metals, pathogenic bacteria, parasites, organic pollutants, odor and the like in the urban sludge become public hazards of urban environmental sanitation, and great potential safety hazards are brought to ecological environment.
At present, the sludge treatment method mainly comprises concentration, conditioning, dehydration, stabilization, drying and the like. However, the methods all require that the water content of the sludge is reduced to 40-60% or even lower, and the water content of the sludge after the sludge concentration and dehydration in a common municipal sewage plant is about 80%, so that the water content of the sludge needs to be further reduced by a certain means before the sludge is treated, a large amount of material consumption and investment are required in the process, and the common intensified dehydration technology causes certain damage to organic matter components in the sludge, which is not beneficial to the resource utilization of the sludge. Therefore, it is necessary to improve the method of solidifying sludge as landfill waste.
Disclosure of Invention
In order to solve the problems of low efficiency of reducing the water content, difficult resource utilization after landfill and the like, the invention provides a method for solidifying sludge as landfill garbage so as to improve the sludge treatment efficiency.
The invention is realized by the following technical scheme: a method for solidifying sludge as landfill garbage comprises the following steps:
(1) preparing the following components in parts by mass based on 100 parts of sludge:
8-12 parts of sodium carboxymethylcellulose I, 3-6 parts of sodium carboxymethylcellulose II, 1-3 parts of sodium carboxymethylcellulose III, 3.5-5 parts of fulvic acid, 7-10 parts of bacillus amyloliquefaciens, 2-6 parts of lactobacillus acidophilus, 1.5-3 parts of peptone, 8-13 parts of sepiolite powder and 10-15 parts of activated carbon;
(2) adding the sodium carboxymethylcellulose I obtained in the step (1) into 100 parts of sludge, continuously stirring for 30-50 minutes, sequentially adding fulvic acid and sodium carboxymethylcellulose II, continuously stirring for 30-50 minutes, then adding bacillus amyloliquefaciens and peptone, continuously ventilating and supplying oxygen for 12-30 hours, stirring at intervals, standing still and filtering, discarding liquid, adding sodium carboxymethylcellulose III into the sludge, continuously stirring for 30-50 minutes, then adding lactobacillus acidophilus, continuously ventilating and supplying oxygen for 12-30 hours, stirring at intervals, standing still and filtering, discarding liquid, finally adding sepiolite powder under stirring conditions, after uniformly mixing, spreading activated carbon on the surface of the sludge, standing for 10-20 hours, filtering the liquid to obtain dewatered sludge;
(3) and mixing the dewatered sludge with the conventional farmland dry materials according to the mass ratio of (3-5) to 1, and then burying to finish the treatment of the sludge.
The sepiolite powder in the step (1) is sepiolite powder with the granularity of 100-200 meshes.
The activated carbon in the step (1) is activated carbon powder with the granularity of 300-350 meshes.
The bacillus amyloliquefaciens and the lactobacillus acidophilus in the step (1) are all commercially available strains.
The fulvic acid in the step (1) is commercially available humic acid.
And (3) the ventilation and oxygen supply in the step (2) are carried out by introducing hot air at the temperature of 28-35 ℃.
The conventional farmland dry materials in the step (3) comprise straws, sawdust, barks and the like.
The invention has the advantages and effects that: the invention optimizes the component proportion of the treated materials, specially limits the adding time of each component, strictly limits the treatment time of each stage, and completely overcomes the problem of low sludge treatment efficiency in the prior art. The water content of the sludge after the microbial inoculum is added for fermentation is lower than that of the sludge without the microbial inoculum, the water content can be reduced to be below 28 percent, the environment is not polluted, no odor is released, the dry farmland materials are thoroughly decomposed after 50 days of landfill, and the utilization value of the treated sludge is improved. The treatment method has the advantages of simple raw materials, easy operation control, low cost, high treatment efficiency and the like.
Detailed Description
The invention is further illustrated by the following examples.
Example 1
(1) Preparing the following components in parts by mass based on 100 parts of sludge:
10 parts of sodium carboxymethylcellulose I, 5 parts of sodium carboxymethylcellulose II, 2 parts of sodium carboxymethylcellulose III, 4 parts of fulvic acid, 8 parts of bacillus amyloliquefaciens, 4 parts of lactobacillus acidophilus, 2 parts of peptone, 10 parts of sepiolite powder with the granularity of 150 meshes and 12 parts of activated carbon with the granularity of 320 meshes;
(2) adding the sodium carboxymethylcellulose I obtained in the step (1) into 100 parts of sludge, continuously stirring for 40 minutes, sequentially adding fulvic acid and sodium carboxymethylcellulose II, continuously stirring for 40 minutes, then adding bacillus amyloliquefaciens and peptone, continuously introducing 30 ℃ hot air and supplying oxygen for 24 hours, stirring from time to time, standing still, filtering, discarding liquid, adding sodium carboxymethylcellulose III into the sludge, continuously stirring for 40 minutes, then adding lactobacillus acidophilus, continuously introducing 30 ℃ hot air and supplying oxygen for 24 hours, stirring from time to time, standing still, filtering, discarding liquid, finally adding sepiolite powder under stirring, after mixing uniformly, spreading activated carbon on the surface of the sludge, standing for 15 hours, filtering liquid, and obtaining dewatered sludge;
(3) and mixing the dewatered sludge with conventional farmland dry materials (such as straws, sawdust, barks and the like) according to the mass ratio of 4:1, and then burying to finish the treatment of the sludge.
Example 2
(1) Preparing the following components in parts by mass based on 100 parts of sludge:
8 parts of sodium carboxymethylcellulose I, 3 parts of sodium carboxymethylcellulose II, 1 part of sodium carboxymethylcellulose III, 3.5 parts of fulvic acid, 7 parts of bacillus amyloliquefaciens, 2 parts of lactobacillus acidophilus, 1.5 parts of peptone, 8 parts of sepiolite powder with the granularity of 100 meshes and 10 parts of active carbon with the granularity of 300 meshes;
(2) adding the sodium carboxymethylcellulose I obtained in the step (1) into 100 parts of sludge, continuously stirring for 30 minutes, sequentially adding fulvic acid and sodium carboxymethylcellulose II, continuously stirring for 30 minutes, then adding bacillus amyloliquefaciens and peptone, continuously introducing hot air at 28 ℃ and supplying oxygen for 30 hours, stirring at intervals, standing still, filtering, discarding liquid, adding sodium carboxymethylcellulose III into the sludge, continuously stirring for 30 minutes, then adding lactobacillus acidophilus, continuously introducing hot air at 28 ℃ and supplying oxygen for 30 hours, stirring at intervals, standing still, filtering, discarding liquid, finally adding sepiolite powder under stirring, spreading activated carbon on the surface of the sludge after uniform mixing, standing for 10 hours, filtering liquid, and obtaining dewatered sludge;
(3) and mixing the dewatered sludge with conventional farmland dry materials (such as straws, sawdust, barks and the like) according to the mass ratio of 3:1, and then burying to finish the treatment of the sludge.
Example 3
(1) Preparing the following components in parts by mass based on 100 parts of sludge:
12 parts of sodium carboxymethylcellulose I, 6 parts of sodium carboxymethylcellulose II, 3 parts of sodium carboxymethylcellulose III, 5 parts of fulvic acid, 10 parts of bacillus amyloliquefaciens, 6 parts of lactobacillus acidophilus, 3 parts of peptone, 13 parts of sepiolite powder with the granularity of 200 meshes and 15 parts of activated carbon with the granularity of 350 meshes;
(2) adding the sodium carboxymethylcellulose I obtained in the step (1) into 100 parts of sludge, continuously stirring for 50 minutes, sequentially adding fulvic acid and sodium carboxymethylcellulose II, continuously stirring for 50 minutes, then adding bacillus amyloliquefaciens and peptone, continuously introducing 35 ℃ hot air and supplying oxygen for 12 hours, occasionally stirring, standing still, filtering, discarding liquid, adding sodium carboxymethylcellulose III into the sludge, continuously stirring for 50 minutes, then adding lactobacillus acidophilus, continuously introducing 35 ℃ hot air and supplying oxygen for 12 hours, occasionally stirring, standing still, filtering, discarding liquid, finally adding sepiolite powder under stirring, after uniformly mixing, spreading activated carbon on the surface of the sludge, standing for 20 hours, filtering liquid, and obtaining dewatered sludge;
(3) and mixing the dewatered sludge with conventional farmland dry materials (such as straws, sawdust, barks and the like) according to the mass ratio of 5:1, and then burying to finish the treatment of the sludge.
Comparative example 1: just the sodium carboxymethylcellulose was added all at once as sodium carboxymethylcellulose i was added as in example 1.
Comparative example 2: as in example 1, only Bacillus amyloliquefaciens and Lactobacillus acidophilus were added at once at the time of the addition of Bacillus amyloliquefaciens.
Comparative example 3: just the activated carbon was added to the sludge with stirring and mixed uniformly as in example 1 together with sepiolite powder.
The treatment effects of the above examples and comparative examples were compared as follows:
Claims (7)
1. a method for solidifying sludge as landfill garbage is characterized by comprising the following steps:
(1) preparing the following components in parts by mass based on 100 parts of sludge:
8-12 parts of sodium carboxymethylcellulose I, 3-6 parts of sodium carboxymethylcellulose II, 1-3 parts of sodium carboxymethylcellulose III, 3.5-5 parts of fulvic acid, 7-10 parts of bacillus amyloliquefaciens, 2-6 parts of lactobacillus acidophilus, 1.5-3 parts of peptone, 8-13 parts of sepiolite powder and 10-15 parts of activated carbon;
(2) adding the sodium carboxymethylcellulose I obtained in the step (1) into 100 parts of sludge, continuously stirring for 30-50 minutes, sequentially adding fulvic acid and sodium carboxymethylcellulose II, continuously stirring for 30-50 minutes, then adding bacillus amyloliquefaciens and peptone, continuously ventilating and supplying oxygen for 12-30 hours, stirring at intervals, standing still and filtering, discarding liquid, adding sodium carboxymethylcellulose III into the sludge, continuously stirring for 30-50 minutes, then adding lactobacillus acidophilus, continuously ventilating and supplying oxygen for 12-30 hours, stirring at intervals, standing still and filtering, discarding liquid, finally adding sepiolite powder under stirring conditions, after uniformly mixing, spreading activated carbon on the surface of the sludge, standing for 10-20 hours, filtering the liquid to obtain dewatered sludge;
(3) and mixing the dewatered sludge with the conventional farmland dry materials according to the mass ratio of (3-5) to 1, and then burying to finish the treatment of the sludge.
2. The method of solidifying sludge as landfill waste according to claim 1, wherein: the sepiolite powder in the step (1) is sepiolite powder with the granularity of 100-200 meshes.
3. The method of solidifying sludge as landfill waste according to claim 1, wherein: the activated carbon in the step (1) is activated carbon powder with the granularity of 300-350 meshes.
4. The method of solidifying sludge as landfill waste according to claim 1, wherein: the bacillus amyloliquefaciens and the lactobacillus acidophilus in the step (1) are all commercially available strains.
5. The method of solidifying sludge as landfill waste according to claim 1, wherein: the fulvic acid in the step (1) is commercially available humic acid.
6. The method of solidifying sludge as landfill waste according to claim 1, wherein: and (3) the ventilation and oxygen supply in the step (2) are carried out by introducing hot air at the temperature of 28-35 ℃.
7. The method of solidifying sludge as landfill waste according to claim 1, wherein: and (4) the conventional farmland dry materials in the step (3) are straws, sawdust and barks.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089787A (en) * | 2001-07-11 | 2003-03-28 | Nippon Paper Industries Co Ltd | Muddy water modifier for drilling and muddy water stabilizing liquid and method for treating waste mud using the same |
| CN102476897A (en) * | 2010-11-24 | 2012-05-30 | 天津市塘沽区鑫宇环保科技有限公司 | Novel sludge treatment method |
| CN107235698A (en) * | 2016-01-30 | 2017-10-10 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of municipal sludge processing curing agent and preparation method thereof |
| CN107417060A (en) * | 2017-08-28 | 2017-12-01 | 湖南奇思环保有限公司 | A kind of curing agent and its synthetic method and application |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089787A (en) * | 2001-07-11 | 2003-03-28 | Nippon Paper Industries Co Ltd | Muddy water modifier for drilling and muddy water stabilizing liquid and method for treating waste mud using the same |
| CN102476897A (en) * | 2010-11-24 | 2012-05-30 | 天津市塘沽区鑫宇环保科技有限公司 | Novel sludge treatment method |
| CN107235698A (en) * | 2016-01-30 | 2017-10-10 | 合肥智慧龙图腾知识产权股份有限公司 | A kind of municipal sludge processing curing agent and preparation method thereof |
| CN107417060A (en) * | 2017-08-28 | 2017-12-01 | 湖南奇思环保有限公司 | A kind of curing agent and its synthetic method and application |
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