CN101948226A - Method for removing heavy metal from sludge in sewage treatment plant - Google Patents
Method for removing heavy metal from sludge in sewage treatment plant Download PDFInfo
- Publication number
- CN101948226A CN101948226A CN 201010281998 CN201010281998A CN101948226A CN 101948226 A CN101948226 A CN 101948226A CN 201010281998 CN201010281998 CN 201010281998 CN 201010281998 A CN201010281998 A CN 201010281998A CN 101948226 A CN101948226 A CN 101948226A
- Authority
- CN
- China
- Prior art keywords
- mud
- heavy metal
- sludge
- sewage treatment
- add
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a method for removing heavy metal from sludge in a sewage treatment plant, which comprises the following steps: (1) pretreating sludge, and (2) removing heavy metal from the sludge. The invention has the following advantages: (1) 60-95% of the heavy metal in the sludge can be removed, thereby being beneficial to realizing the reclamation of the sludge and creating prior conditions for the large-scale agricultural use of the sludge; and (2) the heavy metal in the sludge can be enriched, thereby creating preconditions for the reclamation of the heavy metal in the sludge.
Description
Technical field
The present invention relates to the removal methods of heavy metal in a kind of sludge of sewage treatment plant.
Background technology
Mud is the solid waste that Sewage treatment systems produces.The wet moisture percentage in sewage sludge height of sewage work behind mechanical dehydration, biodegradable is relatively poor, and organic content is higher, contains a large amount of pathogenic bacterias, parasite (ovum) in the undressed mud, heavy metals such as copper, mercury, zinc, chromium.
Mud is a kind of refuse, also is a kind of resource.As refuse, the sludge treatment method of disposal mainly contains sanitary landfill, burning and soil utilization etc., these methods implement three prerequisites: the one, need enough mud landfill space; The 2nd, need bear expensive facility investment and high working cost; The 3rd, the content of objectionable impurities in the mud such as heavy metal etc. there is strict restricted condition.As resource, the N that contains in the mud, P, K are the necessary nutritive substances of crop growth, and the soil ulmin in the mud is good soil improvement agent, therefore, can think in theory, mud be applied to the farmland can improve the soil structure, increase soil fertility, promote the growth of crop.But, mud is used for agriculture production wants strict control heavy metal content wherein, human body is worked the mischief by food chain to prevent heavy metal, for this reason, national governments have successively formulated agricultural sludge heavy-metal concentration standard, and the usage quantity of unit surface mud has been done strict restriction.In the production practice, generally at first mud being carried out being re-used as fertilizer after the compost treatment carries out agricultural, though handling, sludge composting can partly or entirely kill objectionable impurities such as pathogenic bacteria and parasitic ovum in the mud, but the compost treatment process is not removed the heavy metal in the mud, and mud still exists as agricultural environmental risk.Therefore, research and develop the method for heavy metal in a kind of effective elimination mud, both helped realizing the recycling of mud, can guarantee the security that mud uses again in agriculture production, have long-range Significance for Environment.
Summary of the invention
The removal methods that the purpose of this invention is to provide heavy metal in a kind of sludge of sewage treatment plant.
The objective of the invention is to realize in the following way:
The removal methods of heavy metal in a kind of sludge of sewage treatment plant:
(1) mud pre-treatment: get sludge of sewage treatment plants, add sulfuric acid and hydrogen peroxide and make the mud slurry, the mass ratio of sulfuric acid and mud is 1～5: 100, the mass ratio of hydrogen peroxide and mud is 1～5: 100, after stirring 5min～60min, add lime, the pH value that mud is starched is adjusted to 6.5～7.5;
(2) the removing of heavy metal in the mud: pretreated mud slurry is placed flotation machine, add sulfide, the mass ratio of sulfide and mud is 0.1～2: 100, after stirring 5min～30min, the ratio that needs 25g～250g collecting agent in 1000kg mud, add collecting agent, after stirring 5min～15min, the ratio that needs 25g～100g pore forming material in 1000kg mud, add the pore forming material pine camphor oil, behind stirring 2min～10min, carry out flotation, floatation process is added suitable quantity of water, the mass ratio of adding water and mud is 0.5～1: 1, and bubble time 5min～30min is scraped in flotation, obtains froth product, heavy metal accumulation in the mud is in froth product, thereby heavy metal removes in the realization mud.
Described sulfide is a kind of in sodium sulphite, ammonium sulfide, sulfurated lime, the barium sulphide or their combination, and collecting agent is a kind of in xanthate, black powder, the diethyldithiocarbamate or their combination.
The present invention has following beneficial effect: the heavy metal in (1) mud is removed more than 80%, helps realizing the recycling of mud, is the extensive agricultural creation precondition of mud; (2) heavy metal in the mud obtains enrichment, for the recycling of heavy metal in the mud is created precondition.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1 mud sample is taken from Xiangtan City, Hunan sewage work, is the excess sludge behind mechanical dehydration, and water ratio is 80.5%, and solid content is 19.5%, heavy metal content such as table 1 in the mud sample (butt).
Heavy metal content (mg/kg) in table 1 mud sample (butt)
| Composition | Hg | Cd | Cr | As | Zn | Cu | Ni | Pb |
| Content | 5.0 | 2.5 | 150 | 45 | 850 | 250 | 80 | 35 |
(1) mud pre-treatment: get the wet mud sample (dry weight 195g) of 1000g, add water 1000g, make mud and starch, add sulfuric acid 25g, add hydrogen peroxide 40g, behind the stirring 30min, add lime, the pH value that mud is starched is adjusted to 7.5;
(2) the removing of heavy metal in the mud: pretreated mud slurry is placed flotation machine, adds sulfurated lime 2g, stir 10min after, add butyl xanthate 0.05g, butyl ammonium aerofloat 0.05g behind the stirring 10min, adds pine camphor oil 0.05g, after stirring 5min, carry out flotation, bubble time 12min is scraped in flotation, obtains froth product, froth product (butt) quality is 8.5g, and froth product is 4.36% with respect to the productive rate of mud sample (butt).Heavy metal content and grade such as table 2 in the flotation froth product (butt), heavy metal content such as table 3 in the mud after the flotation (butt), the decreasing ratio such as the table 4 of heavy metal in the mud (butt).
Heavy metal content (mg/kg) and grade (%) in the table 2 flotation froth product (butt)
| Composition | Hg | Cd | Cr | As | Zn | Cu | Ni | Pb |
| Content | 471 | 235 | 10588 | 4765 | 95000 | 27941 | 8647 | 3824 |
| Grade | 0.047 | 0.024 | 1.06 | 0.48 | 9.5 | 2.8 | 0.86 | 0.38 |
Heavy metal content (mg/kg) in the mud after table 3 flotation (butt)
| Composition | Hg | Cd | Cr | As | Zn | Cu | Ni | Pb |
| Content | 1.0 | 0.5 | 60 | 4.5 | 42.5 | 12.5 | 6.5 | 2.5 |
The decreasing ratio (%) of heavy metal in table 4 mud (butt)
| Composition | Hg | Cd | Cr | As | Zn | Cu | Ni | Pb |
| Decreasing ratio | 80 | 80 | 60 | 90 | 95 | 95 | 92 | 93 |
By table 2, table 3 and table 4 as can be known, the heavy metal major part in the mud is enriched in the flotation froth product, and the decreasing ratio of heavy metal is higher in the mud, and except the decreasing ratio of Cr has only 60%, the decreasing ratio of other heavy metal is all more than or equal to 80%.It can also be seen that by table 2, heavy metal grade in the froth product is higher, and the grade of Zn has reached 9.5%, and the grade of Cu has reached 2.8%, surpassed the grade of Zn in general zinc ore, the copper mine stone and the grade of Cu, can be used as the fine metals resources and be used.
Claims (4)
1. the removal methods of heavy metal in the sludge of sewage treatment plant is characterized in that:
(1) mud pre-treatment: get sludge of sewage treatment plants, add sulfuric acid and hydrogen peroxide and make the mud slurry, the mass ratio of sulfuric acid and mud is 1～5: 100, the mass ratio of hydrogen peroxide and mud is 1～5: 100, after stirring 5min～60min, add lime, the pH value that mud is starched is adjusted to 6.5～7.5;
(2) the removing of heavy metal in the mud: pretreated mud slurry is placed flotation machine, add sulfide, the mass ratio of sulfide and mud is 0.1～2: 100, after stirring 5min～30min, the ratio that needs 25g～250g collecting agent in 1000kg mud, add collecting agent, after stirring 5min～15min, the ratio that needs 25g～100g pore forming material in 1000kg mud, add the pore forming material pine camphor oil, behind stirring 2min～10min, carry out flotation, floatation process is added suitable quantity of water, the mass ratio of adding water and mud is 0.5～1: 1, and bubble time 5min～30min is scraped in flotation, obtains froth product, heavy metal accumulation in the mud is in froth product, thereby heavy metal removes in the realization mud.
2. the removal methods of heavy metal in a kind of sludge of sewage treatment plant according to claim 1 is characterized in that: described mud is the mud of sewage work after mechanical dehydration is handled, and water ratio is less than 85%.
3. the removal methods of heavy metal in a kind of sludge of sewage treatment plant according to claim 1 is characterized in that: described sulfide is a kind of in sodium sulphite, ammonium sulfide, sulfurated lime, the barium sulphide or their combination.
4. the removal methods of heavy metal in a kind of sludge of sewage treatment plant according to claim 1 is characterized in that: described collecting agent is a kind of in xanthate, black powder, the diethyldithiocarbamate or their combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010281998 CN101948226A (en) | 2010-09-15 | 2010-09-15 | Method for removing heavy metal from sludge in sewage treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010281998 CN101948226A (en) | 2010-09-15 | 2010-09-15 | Method for removing heavy metal from sludge in sewage treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101948226A true CN101948226A (en) | 2011-01-19 |
Family
ID=43451878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010281998 Pending CN101948226A (en) | 2010-09-15 | 2010-09-15 | Method for removing heavy metal from sludge in sewage treatment plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101948226A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103909090A (en) * | 2014-04-28 | 2014-07-09 | 山东大学 | Method for removing heavy metal ions in soil by water base foam formed by surfactant |
| CN104275341A (en) * | 2014-01-22 | 2015-01-14 | 天津城建大学 | Treatment method for heavy metal polluted sediment |
| CN105565461A (en) * | 2015-12-23 | 2016-05-11 | 曹阳 | Chromium-containing industrial wastewater processing method |
| CN106395910A (en) * | 2016-08-29 | 2017-02-15 | 中南大学 | Method for preparation of battery grade high-purity manganese sulfate from industrial grade manganese sulfate |
| CN106564957A (en) * | 2016-10-13 | 2017-04-19 | 中南大学 | A method of preparing battery-grade high-purity manganese sulfate by utilizing low-grade manganese ore |
| CN106587161A (en) * | 2016-11-11 | 2017-04-26 | 中南大学 | Preparation method of manganese sulfate monohydrate ultralow in water-insoluble substance content |
| CN107512837A (en) * | 2017-09-11 | 2017-12-26 | 云南省环境科学研究院(中国昆明高原湖泊国际研究中心) | The processing method of the river bottom mud containing heavy metal |
| CN108455755A (en) * | 2018-03-01 | 2018-08-28 | 湘潭大学 | A method of removing heavy metal in advance from town sewage |
| CN108687128A (en) * | 2018-06-14 | 2018-10-23 | 方碧水 | A kind of soil restoring device |
| CN108817057A (en) * | 2018-07-05 | 2018-11-16 | 深圳粤鹏环保技术股份有限公司 | A kind of heavy metal pollution sludge and soil remediation technique |
| CN109696339A (en) * | 2018-12-13 | 2019-04-30 | 中国科学院生态环境研究中心 | A kind of sample pretreating method that the heavy metal ion suitable for water quickly detects |
| CN113912238A (en) * | 2021-11-09 | 2022-01-11 | 魏桥国科(滨州)科学工程产业技术研究院有限公司 | Upgrading method for enriching organic matters in printing and dyeing sludge |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002081386A1 (en) * | 2001-04-05 | 2002-10-17 | Tetraflow Limited | Sludge and slurry destruction plant and process |
| CN1648077A (en) * | 2004-04-30 | 2005-08-03 | 南京农业大学 | Process and its device for biologically removing heavy metal in mud |
| CN101691271A (en) * | 2009-10-13 | 2010-04-07 | 罗健泉 | Method for removing heavy ion by activated sludge by using industrial waste liquid |
-
2010
- 2010-09-15 CN CN 201010281998 patent/CN101948226A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002081386A1 (en) * | 2001-04-05 | 2002-10-17 | Tetraflow Limited | Sludge and slurry destruction plant and process |
| CN1648077A (en) * | 2004-04-30 | 2005-08-03 | 南京农业大学 | Process and its device for biologically removing heavy metal in mud |
| CN101691271A (en) * | 2009-10-13 | 2010-04-07 | 罗健泉 | Method for removing heavy ion by activated sludge by using industrial waste liquid |
Non-Patent Citations (1)
| Title |
|---|
| 《天津化工》 20090731 智建辉 电镀重金属污泥综合利用研究 10-13 1-4 第23卷, 第4期 2 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104275341A (en) * | 2014-01-22 | 2015-01-14 | 天津城建大学 | Treatment method for heavy metal polluted sediment |
| CN104275341B (en) * | 2014-01-22 | 2017-02-08 | 天津城建大学 | Treatment method for heavy metal polluted sediment |
| CN103909090A (en) * | 2014-04-28 | 2014-07-09 | 山东大学 | Method for removing heavy metal ions in soil by water base foam formed by surfactant |
| CN103909090B (en) * | 2014-04-28 | 2016-01-20 | 山东大学 | A kind of water base foam utilizing surfactant to be formed removes the method for heavy metal in soil ion |
| CN105565461A (en) * | 2015-12-23 | 2016-05-11 | 曹阳 | Chromium-containing industrial wastewater processing method |
| CN106395910A (en) * | 2016-08-29 | 2017-02-15 | 中南大学 | Method for preparation of battery grade high-purity manganese sulfate from industrial grade manganese sulfate |
| CN106564957A (en) * | 2016-10-13 | 2017-04-19 | 中南大学 | A method of preparing battery-grade high-purity manganese sulfate by utilizing low-grade manganese ore |
| CN106587161A (en) * | 2016-11-11 | 2017-04-26 | 中南大学 | Preparation method of manganese sulfate monohydrate ultralow in water-insoluble substance content |
| CN107512837A (en) * | 2017-09-11 | 2017-12-26 | 云南省环境科学研究院(中国昆明高原湖泊国际研究中心) | The processing method of the river bottom mud containing heavy metal |
| CN108455755A (en) * | 2018-03-01 | 2018-08-28 | 湘潭大学 | A method of removing heavy metal in advance from town sewage |
| CN108455755B (en) * | 2018-03-01 | 2021-01-22 | 湘潭大学 | Method for removing heavy metals from town sewage in advance |
| CN108687128A (en) * | 2018-06-14 | 2018-10-23 | 方碧水 | A kind of soil restoring device |
| CN108817057A (en) * | 2018-07-05 | 2018-11-16 | 深圳粤鹏环保技术股份有限公司 | A kind of heavy metal pollution sludge and soil remediation technique |
| CN109696339A (en) * | 2018-12-13 | 2019-04-30 | 中国科学院生态环境研究中心 | A kind of sample pretreating method that the heavy metal ion suitable for water quickly detects |
| CN113912238A (en) * | 2021-11-09 | 2022-01-11 | 魏桥国科(滨州)科学工程产业技术研究院有限公司 | Upgrading method for enriching organic matters in printing and dyeing sludge |
| CN113912238B (en) * | 2021-11-09 | 2023-12-15 | 魏桥国科(滨州)科学工程产业技术研究院有限公司 | Upgrading method for enriching organic matters in printing and dyeing sludge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101948226A (en) | Method for removing heavy metal from sludge in sewage treatment plant | |
| Lee et al. | Sustainable approach to biotransform industrial sludge into organic fertilizer via vermicomposting: A mini‐review | |
| Mahmoud et al. | Effect of vermicompost and its mixtures with water treatment residuals on soil chemical properties and barley growth | |
| Chhonkar et al. | Impact of industrial effluents on soil health and agriculture-Indian experience: part I-distillery and paper mill effluents | |
| Gogoi et al. | Effect of vermicomposting on copper and zinc removal in activated sludge with special emphasis on temporal variation | |
| NL2026659B1 (en) | Plant growth medium based on residue from high temperature thermal oxidation of oily solid wase | |
| CN109160860A (en) | Cities and towns kitchen garbage, agriculture and forestry organic waste material and riverway sludge and municipal sludge federated resourceization utilize method | |
| CN101913743B (en) | Agent special for bioleaching municipal sludge and production process thereof | |
| CN101722177A (en) | Method for fixing pollutants in pollution source soil in abandoned mine fields and application thereof | |
| CN103771671A (en) | Excess sludge treatment method | |
| CN113996643B (en) | Kitchen waste hydrothermal conversion rapid humification method | |
| CN101665376B (en) | Method for treating and comprehensively utilizing sludge after sewage treatment | |
| CN105198524B (en) | A kind of additive and preparation method thereof for handling sludge | |
| CN101962302A (en) | Method for preparing organic fertilizer by using sewage to treat excess sludge | |
| Chen et al. | Remediation of Soil Contaminated by Heavy Metals Using Biochar: Strategies and Future Prospects. | |
| Cheng-Kim et al. | Heavy metal contaminated soil bioremediation via vermicomposting with spent mushroom compost | |
| CN106631402A (en) | Household garbage treatment method | |
| Jieqiong et al. | Distribution of heavy metals in pig farm biogas residues and the safety and feasibility assessment of biogas fertilizer | |
| CN110484266B (en) | Sludge-based soil conditioner and preparation method thereof | |
| El-Hassanin et al. | Bioaccumulation of heavy metals during composting and vermicomposting processes of sewage sludge | |
| CN111607403A (en) | Farmland mercury-polluted soil remediation material and application method thereof | |
| US20230036097A1 (en) | Method for controlling heavy metal scouring pollution in mines by using humified product | |
| Rai et al. | Alternate amendments for reclamation of alkali soils | |
| CN114365671A (en) | Nonmetal solid waste reconstructed surface soil and preparation method thereof | |
| Yue-qing et al. | Present Status of Heavy Metal Pollution from Livestock Waste and Progress on Passivation Measures. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Tian Xueda Document name: Notification to Go Through Formalities of Registration |
|
| DD01 | Delivery of document by public notice |
Addressee: Tian Xueda Document name: Notification that Entitlement to Patent Deemed Abandoned |
|
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20110119 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |