CN116177847A - Sludge conditioning agent and use method thereof - Google Patents
Sludge conditioning agent and use method thereof Download PDFInfo
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- CN116177847A CN116177847A CN202310466666.5A CN202310466666A CN116177847A CN 116177847 A CN116177847 A CN 116177847A CN 202310466666 A CN202310466666 A CN 202310466666A CN 116177847 A CN116177847 A CN 116177847A
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- Prior art keywords
- sludge
- conditioning agent
- silicon composite
- parts
- composite conditioner
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Classifications
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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
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
-
- 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
-
- 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
Abstract
The invention discloses a sludge conditioning agent and a using method thereof, and relates to the technical field of sludge treatment. The sludge conditioning agent is composed of a polymeric aluminum-silicon composite conditioner and rice husk biochar, wherein the polymeric aluminum-silicon composite conditioner is formed by mixing aluminum chloride, sodium silicate and sodium carbonate. The sludge conditioning agent has strong adsorption and bridging capacity, so that the formed sludge flocs are more compact and more compression-resistant. Meanwhile, the compressibility of the sludge can be improved, so that the sludge cake can still keep permeability under larger mechanical pressure, and the filtration capacity of the sludge can be improved. The sludge conditioning agent disclosed by the invention is used for conditioning sludge, can obviously improve the deep dewatering capacity of the sludge, can be widely applied to pretreatment of sludge in municipal sewage treatment plants, and has good application prospects.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to a sludge conditioning agent and a method for treating sludge by using the sludge conditioning agent so as to improve sludge dewatering efficiency.
Background
The sludge is an associated product in the sewage treatment process by an activated sludge method, the water content of the sludge is up to more than 99%, and secondary pollution is easily caused to the environment when the sludge is not treated. The activated sludge process can effectively remove organic matters in sewage, but the amount of the produced surplus sludge is still huge. According to statistics of annual report of the ecological environment statistics in 2021, the sludge production of a sewage treatment plant (calculated by the water content of 80%) is 4592.1 ten thousand tons, and the annual sludge yield of 2025 China is expected to break through 9000 ten thousand tons, so that the sewage treatment problem is converted into the solid waste treatment problem by the traditional biochemical treatment process. Because dewatering can effectively reduce the volume of sludge, the realization of rapid and efficient dewatering of sludge is a key for sludge reduction, stabilization, harmlessness and recycling treatment. According to the requirement of GB 24188-2009 of sludge quality of urban sewage treatment plant, the sludge water content of urban sewage treatment plant needs to be reduced to below 80%, but the water content of primary sludge produced by most domestic sewage treatment plants is still higher. In order to further reduce the sludge and reduce the cost of subsequent treatment, the requirement of the sludge recycling on the water content is met, and the sludge is required to be subjected to deep dehydration treatment.
At present, a filter pressing technology is adopted to dehydrate sludge, but as sludge flocs are of a highly hydrated colloid structure, the compressibility of the sludge is high, a drainage channel is closed due to large mechanical pressure in the filter pressing process, if no pretreatment is carried out, the dewatering of colloid solids by adopting a mechanical pressure mode has great difficulty, and the water content of the sludge cannot be reduced to below 60%.
Therefore, there is a need to find an effective sludge conditioning method to increase the efficiency of sludge dewatering, thereby obtaining deep dewatering of sludge.
Disclosure of Invention
Aiming at the technical problem of difficult sludge dewatering, the invention aims to provide a sludge conditioning agent which uses rice husk biochar as a skeleton construct and is combined with a polymeric aluminum-silicon composite conditioner, so that the dewatering performance of sludge is improved, and the efficient reduction of the sludge is realized.
The invention is realized by adopting the following technical scheme:
a sludge conditioning agent is prepared from a polymeric aluminum-silicon composite conditioner andthe rice husk biological carbon consists of rice husk biological carbon, wherein the polyaluminium-silicon composite conditioner is formed by mixing aluminum chloride, sodium silicate and sodium carbonate. Wherein the aluminum chloride provides predominantly Al 3+ ，Al 3+ The silicon has the function of neutralizing the surface charge of the sludge, and can promote the formation of a porous structure and improve the aggregate efficiency, so that the formed sludge flocs are denser and more compression-resistant; after the rice husk charcoal is added, the rice husk charcoal forms a framework structure with certain structural strength with the sludge through electrostatic crosslinking, so that the strength of sludge flocs is enhanced, the sludge cake can still keep permeability under larger mechanical pressure, and the sludge filter capacity is improved.
Preferably, the polyaluminium silicon composite conditioner comprises the following raw materials in parts by weight: 20-60 parts of aluminum chloride, 30-50 parts of sodium silicate and 5-10 parts of sodium carbonate.
Preferably, the granularity of the rice hull charcoal is smaller than 0.8mm, and the specific surface area is 4.5-5.0 cm 3 /g。
The invention also provides a using method of the sludge conditioning agent, namely the sludge conditioning agent is used for treating sludge so as to achieve the purpose of deep dehydration after the sludge conditioning agent is subjected to filter pressing. The concrete application method is that under stirring, the polymeric aluminum-silicon composite conditioner and the rice hull biochar are sequentially added into the sludge, and the sludge is fully and uniformly mixed and then subjected to filter pressing dehydration.
Preferably, the addition amount of the rice hull biochar is 1% -10% of the dry mass of the sludge, and the addition amount of the polymeric aluminum-silicon composite conditioner is 1% -7% of the dry mass of the sludge.
According to the method, the conditioned sludge is subjected to deep dehydration, the water content of the residual sludge with the water content of 99% is reduced to 53% -60% after the deep dehydration, and the water content of the primary sludge with the water content of 83% is reduced to 60% -65% after the deep dehydration, so that the efficient reduction of the sludge is realized.
Compared with the prior art, the technical scheme of the invention has the beneficial technical effects that:
1) The sludge conditioning agent of the invention adopts a mechanical dewatering method to reduce the water content of sludge to below 65% through the synergistic effect of chemical conditioning and filter aid, thereby greatly reducing the volume of sludge and lowering the transportation cost.
2) The addition amount of the sludge conditioning agent is controlled within 10% of the dry sludge, and the agent components are easy to obtain, so that the preparation cost of the product and the treatment cost of the sludge are greatly saved.
3) According to the technical scheme, the rice husk charcoal is used as a physical conditioner, and the conditioner has good adsorption and stabilization effects on heavy metals, so that the heavy metals can be stabilized while the sludge dewatering is improved compared with the sludge conditioning method in the prior art.
Detailed Description
Embodiments of the present invention are specifically illustrated by the following examples, which are intended to illustrate the present invention and are not intended to be limiting.
The invention provides a sludge conditioning agent which consists of a polymeric aluminum-silicon composite conditioner and rice husk biochar, wherein the polymeric aluminum-silicon composite conditioner consists of 20-60 parts by mass of aluminum chloride, 30-50 parts by mass of sodium silicate and 5-10 parts by mass of sodium carbonate. The grain diameter of the rice hull charcoal is smaller than 0.8mm, and the specific surface area is 4.0-5.0 m 3 /g。
In some embodiments, the polyaluminum silicon composite conditioner is composed of 20 parts by mass of aluminum chloride, 30 parts by mass of sodium silicate and 5 parts by mass of sodium carbonate.
In some embodiments, the polyaluminum silicon composite conditioner is composed of 30 parts by mass of aluminum chloride, 40 parts by mass of sodium silicate and 5 parts by mass of sodium carbonate.
In some embodiments, the polyaluminum silicon composite conditioner is composed of 40 parts by mass of aluminum chloride, 30 parts by mass of sodium silicate and 10 parts by mass of sodium carbonate.
In some embodiments, the polyaluminum silicon composite conditioner of the present invention is composed of 50 parts by mass of aluminum chloride, 40 parts by mass of sodium silicate and 5 parts by mass of sodium carbonate.
In some embodiments, the polyaluminum silicon composite conditioner of the invention is composed of 60 parts by mass of aluminum chloride, 50 parts by mass of sodium silicate and 10 parts by mass of sodium carbonate.
In some embodiments, the rice hull biochar of the present invention has a particle size of 0.5mm, a ratio ofArea of 4.6m 3 /g。
Example 1
A sludge conditioning agent consists of a polymeric aluminum-silicon composite conditioner and rice hull biochar, wherein the polymeric aluminum-silicon composite conditioner consists of 20 parts by mass of aluminum chloride, 30 parts by mass of sodium silicate and 5 parts by mass of sodium carbonate, the grain size of the rice hull biochar is 0.5mm, and the specific surface area is 4.6m 3 /g。
The sludge was subjected to deep dehydration treatment using the sludge conditioning agent of example 1, and the specific treatment method was as follows:
s1, extracting residual sludge with the water content of 97.78+/-1.21% into a sludge storage tank through a submersible sewage pump, and starting a stirrer;
s2, adding rice hull biochar accounting for 5% of the dry mass of the sludge into the sludge mixed solution, and stirring by a stirrer to fully and uniformly mix the sludge mixed solution and the rice hull biochar;
s3, adding a polymeric aluminum-silicon composite conditioner accounting for 5% of the dry basis mass of the sludge into the sludge mixed solution, and stirring by a stirrer to fully mix the mixture;
s4, the conditioned sludge mixed liquor enters a high-pressure plate-and-frame filter press through a diaphragm pump to carry out dehydration treatment, and after deep dehydration, the water content of the sludge is reduced from 97.71 +/-1.21% to 53.62 +/-0.25%, so that the deep dehydration of the sludge is completed.
Example 2
A method for deep dehydration treatment of sludge adopts the sludge conditioning agent of the embodiment 1, and the specific treatment method is as follows:
s1, extracting residual sludge with the water content of 99.48+/-0.18% into a sludge storage tank through a submersible sewage pump, and starting a stirrer;
s2, adding rice hull biochar accounting for 7% of the dry mass of the sludge into a sludge storage tank, and stirring by a stirrer to fully and uniformly mix the sludge mixed solution and the rice hull biochar;
s3, adding a polymeric aluminum-silicon composite conditioner accounting for 3% of the dry basis weight of the sludge into the sludge mixed solution, and stirring by a stirrer to fully mix the mixture;
s4, the conditioned sludge enters a high-pressure plate-and-frame filter press to carry out deep dehydration treatment, the water content of the dehydrated sludge is reduced from 99.48+/-0.18% to 55.12+/-0.46%, and the deep dehydration of the sludge is completed.
Example 3
A method for deep dehydration treatment of sludge adopts the sludge conditioning agent of the embodiment 1, and the specific treatment method is as follows:
s1, dehydrating residual sludge with the water content of 98.13+/-1.18% through a belt type concentration filter press after conditioning through CPAM, and obtaining primary sludge with the water content of 83.15 +/-0.22%;
s2, according to the result of the embodiment 1, selecting rice hull biochar, wherein the adding amount of the rice hull biochar is 5% of the dry basis weight of the sludge, and the adding amount of the polymeric aluminum-silicon composite conditioner is 5% of the dry basis weight of the sludge;
s3, uniformly mixing the primary sludge in the S1, the rice hull biochar and the polymeric aluminum-silicon composite conditioner in a modified mixing device of the high-pressure belt filter press;
s4, conveying the sludge modified in the step S3 to a deep stripping host machine through a modification screw conveyor;
s5, after deep dehydration by the high-pressure belt filter press, the water content of the sludge is reduced from 83.15 +/-0.22% to 60.35+/-0.20%, so that the efficient reduction of the sludge is realized.
Example 4
A method for deep dehydration treatment of sludge adopts the sludge conditioning agent of the embodiment 1, and the specific treatment method is as follows:
s1, dehydrating residual sludge with the water content of 99.13+/-1.04% through a belt type concentration filter press after conditioning through CPAM, and obtaining primary sludge with the water content of 85.26 +/-1.12%;
s2, according to the result of the embodiment 1, selecting rice hull biochar, wherein the adding amount of the rice hull biochar is 7% of the dry basis weight of the sludge, and the adding amount of the polymeric aluminum-silicon composite conditioner is 3% of the dry basis weight of the sludge;
s3, uniformly mixing the primary sludge in the S1, the rice hull biochar and the polymeric aluminum-silicon composite conditioner in a modified mixing device of the high-pressure belt filter press;
s4, conveying the sludge modified in the step S3 to a deep stripping host machine through a modification screw conveyor;
s5, after deep dehydration by the high-pressure belt filter press, the water content of the sludge is reduced from 85.26 +/-1.12% to 63.44 +/-0.11%, so that the efficient reduction of the sludge is realized.
The sludge conditioning agent for reducing the water content of the sludge is obviously improved in the aspect of reducing the water content of the sludge, and has good reduction effect on the residual sludge and the primary sludge after conditioning.
The specific embodiments of, and examples for, the invention are described herein for illustrative purposes only and are not intended to be limiting, as the invention may be modified in arrangement and use by those skilled in the art, in light of the above teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (5)
1. The sludge conditioning agent is characterized by comprising a polymeric aluminum-silicon composite conditioner and rice husk biochar, wherein the polymeric aluminum-silicon composite conditioner is formed by mixing aluminum chloride, sodium silicate and sodium carbonate.
2. The sludge conditioning agent of claim 1 wherein: the polymeric aluminum silicon composite conditioner comprises the following raw materials in parts by weight: 20-60 parts of aluminum chloride, 30-50 parts of sodium silicate and 5-10 parts of sodium carbonate.
3. The sludge conditioning agent of claim 1 wherein: the granularity of the rice hull biochar is smaller than 0.8mm, and the specific surface area is 4.5-5.0 cm 3 /g。
4. The method of using a sludge conditioning agent according to any one of claims 1 to 3, characterized in that: under stirring, sequentially adding the polymeric aluminum-silicon composite conditioner and the rice hull biochar into the sludge, fully and uniformly mixing, and then carrying out filter pressing dehydration.
5. The method of using a sludge conditioning agent according to claim 4, wherein: the addition amount of the rice hull biochar is 1-10% of the dry mass of the sludge, and the addition amount of the polymeric aluminum-silicon composite conditioner is 1-7% of the dry mass of the sludge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310466666.5A CN116177847A (en) | 2023-04-27 | 2023-04-27 | Sludge conditioning agent and use method thereof |
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| CN202310466666.5A CN116177847A (en) | 2023-04-27 | 2023-04-27 | Sludge conditioning agent and use method thereof |
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| CN116177847A true CN116177847A (en) | 2023-05-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005097069A (en) * | 2002-09-19 | 2005-04-14 | Natoo Kenkyusho:Kk | Cold hydraulic treating material, effective utilization method for treating material, modified article modified with treating material, and inorganic formed article worked and prepared by treating material |
| KR20130055321A (en) * | 2011-11-18 | 2013-05-28 | (주)서정화학 | Process for preparing a high alkalinity flocculant for watertreatment mixed active silicate |
| CN105541081A (en) * | 2016-01-22 | 2016-05-04 | 浙江正洁环境科技有限公司 | Composite conditioner for sludge dewatering and using method thereof |
| CN113415963A (en) * | 2021-05-13 | 2021-09-21 | 北京云水浩瑞环境科技有限公司 | Method for treating sludge |
| CN115231790A (en) * | 2022-08-05 | 2022-10-25 | 许国仁 | Soil improvement process for sludge pyrolysis carbonization coupling sludge treatment |
-
2023
- 2023-04-27 CN CN202310466666.5A patent/CN116177847A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005097069A (en) * | 2002-09-19 | 2005-04-14 | Natoo Kenkyusho:Kk | Cold hydraulic treating material, effective utilization method for treating material, modified article modified with treating material, and inorganic formed article worked and prepared by treating material |
| KR20130055321A (en) * | 2011-11-18 | 2013-05-28 | (주)서정화학 | Process for preparing a high alkalinity flocculant for watertreatment mixed active silicate |
| CN105541081A (en) * | 2016-01-22 | 2016-05-04 | 浙江正洁环境科技有限公司 | Composite conditioner for sludge dewatering and using method thereof |
| CN113415963A (en) * | 2021-05-13 | 2021-09-21 | 北京云水浩瑞环境科技有限公司 | Method for treating sludge |
| CN115231790A (en) * | 2022-08-05 | 2022-10-25 | 许国仁 | Soil improvement process for sludge pyrolysis carbonization coupling sludge treatment |
Non-Patent Citations (1)
| Title |
|---|
| 孙传饶主编: "《选矿工程师手册 第1册 上 选矿通论》", 北京：冶金工业出版社, pages: 579 * |
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