CN102503054A - Textile dyeing sludge processing method for removing heavy metal and dehydrating - Google Patents
Textile dyeing sludge processing method for removing heavy metal and dehydrating Download PDFInfo
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- CN102503054A CN102503054A CN2011103407143A CN201110340714A CN102503054A CN 102503054 A CN102503054 A CN 102503054A CN 2011103407143 A CN2011103407143 A CN 2011103407143A CN 201110340714 A CN201110340714 A CN 201110340714A CN 102503054 A CN102503054 A CN 102503054A
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Abstract
The invention relates to a textile dyeing sludge processing method for removing heavy metal and dehydrating, which comprises the following steps: (1) adding industrial grade sulfate into textile dyeing sludge, mixing and reacting to form a solid-liquid mixture; (2) heating the solid-liquid mixture obtained in the step (1) to be 35-120 DEG C, and warming for 5-100 minutes; (3) filtering the solid-liquid mixture processed through the step (2) to obtain sludge slag and filtrate; (4) regulating the pH value of the filtrate obtained in the step (3) to be 7.0-9.5, adding industrial grade sodium sulfide medicament, stirring for 15-35 minutes, and filtering to obtain clear filtrate and filter residues containing the heavy metal; and (5) returning the clear filtrate obtained in the step (4) into a sewage processing system, and drying the filter residues for further processing. Since the method is used for carrying out heavy metal removal and dehydration on the textile dyeing sludge, the effect is good and the cost is low.
Description
Technical field
The present invention relates to a kind of printing and dyeing sludge treatment process, especially relate to a kind of printing and dyeing sludge treatment process that removes heavy metal and dehydration.
Background technology
Along with developing rapidly of dyeing industry; Although printing and dyeing enterprise is being updated aspect product, complete processing and the printing and dyeing sludge treatment technology; But the organism that is difficult to biochemical degradation owing to used various PVA slurries, New-type adjuvant etc.; Through dyeing waste water, finally get in a large number among the printing and dyeing sludge that is produced, cause the printing and dyeing sludge intractability to strengthen.The mud that after treatment of dyeing wastewater, produces still is difficult to dehydration, and the water ratio of dehydrated sludge reaches about 80%.The character of printing and dyeing sludge with become to be grouped into, then with required raw material fabric of printing and dyeing enterprise itself and the product category that is processed into, the complete processing of employing, various medicaments of selecting for use (like slurry, dyestuff, auxiliary agent etc.), and waste water treatment process etc. is relevant.In general, the organic content of bio-refractory is high, and it is smelly to be prone to corruption; Particle is more tiny; Contain heavy metal and poisonous elements such as nickel, copper, chromium, zinc, arsenic, bigger to the toxicity of biology, stronger to the pollution of environment, belong to one type of dangerous environment source of pollution.Therefore, need spend a large amount of expenses aspect the processing printing and dyeing sludge.
At present; To printing and dyeing sludge; Mainly be to utilize printing and dyeing sludge stabilization method (like aerobic sigestion, anaerobic digestion) or innoxious method (as with industrial sodium hydroxide conditioning, heavy metal-passivated) to carry out primary treatment earlier, adopt mummification, burning or landfill to carry out ultimate processing then.Owing on its suitability and economy, there are many unfavorable factors, therefore, still owing desirable aspect the effect of the minimizing that solves printing and dyeing sludge, innoxious and stabilization problem.
Like " analysis of printing and dyeing sludge treatment technology " (" Guangdong chemical industry " magazine; 2010 the 03rd phases; Author Wang Wenrui, Zhang Peng) civilization really points out: " because the slurry in the printing and dyeing sludge, dyestuff, auxiliary agent etc. all belong to the organic substance of difficult degradation; so aerobic sigestion is applied to printing and dyeing sludge and need consumes lot of energy, aerobic sigestion generally is not suitable for the processing of printing and dyeing sludge." " heat drying is to utilize heat energy that mud is dried.Only make the moisture in the mud obtain reduction, organic content does not reduce in the mud, so it is not a stabilization treatment." " drying and other treatment technology energy consumption is too high, and it is higher to be applied to printing and dyeing sludge processing capital." " advantage of burning is can be rapidly and realize minimizing to greatest extent.It had both created condition for the outlet that solves mud, had fully consumed the energy in the mud again, and needn't consider the inactivation treatment of pathogenic bacteria.The recyclable utilization of the heat energy of sludge incineration, toxic pollutant is oxidized, and the heavy metal activity in the ashes reduces greatly.Shortcoming is that high capital pollutes waste gas, noise, vibrations, heat and radiation with producing.Along with sulfurous gas etc. as the Air Pollution Control thing, will strict more requirement be proposed to the burning of mud ".
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of treatment effect good, the printing and dyeing sludge treatment process that removes heavy metal and dehydration that processing cost is lower.
The technical solution adopted for the present invention to solve the technical problems is: a kind of printing and dyeing sludge treatment process that removes heavy metal and dehydration may further comprise the steps:
(1) pre-treatment: the ratio that in mass concentration is the mass ratio 0.02-0.2:1 of 93% technical grade sulfuric acid and printing and dyeing sludge adds technical grade sulfuric acid in printing and dyeing sludge, stirs and reacts, and churning time is 5-100min, after the stirring, forms solidliquid mixture;
(2) microwave heating: step (1) gained solidliquid mixture is warming up to 35-120 ℃, insulation 5-100min; Heavy metal compound in the printing and dyeing sludge dissolves under the promoter action of microwave heating;
(3) filter: will filter through the solidliquid mixture after step (2) is handled, and carry out solid-liquid separation, and get sludge silt and the filtrating of water ratio below 50%;
(4) separate out heavy metal: step (3) gained pH value of filtrate is adjusted to 7.0-9.5 with sodium hydroxide solution; Mass ratio in technical grade sodium sulphite medicament and printing and dyeing sludge is the ratio adding technical grade sodium sulphite medicament of 0.004-0.02:1 then; Stir 15-35min; Filter again, get clear filtrate and the filter residue that contains heavy metal;
The technical grade sodium sulphite medicament that said technical grade sodium sulphite medicament is Containing Sulfur sodium 67wt%;
(5) the final processing: the Sewage treatment systems with step (4) gained clear filtrate is sent treatment of dyeing wastewater factory back to the oven dry of step (4) gained filter residue, focuses on according to existing standard then separately.
The present invention has the following advantages:
(1) the present invention takes to add sour pretreatment mode, has realized that contained heavy metal and acid-respons form heavy metal ion in the printing and dyeing sludge to get into the purpose in the aqueous solution;
(2) the present invention utilizes the microwave heating treatment mode, and the microorganism cells body in the broken mud is separated out the heavy metal in the microorganism cells;
(3) take to add and utilize the heating of microwave thermal radiation energy after the acid again, realized the fully purpose of reaction of heavy metal compound and acid;
(4) utilize the present invention to handle printing and dyeing sludge, mud ability deep dehydration can make water ratio reach 75% ~ 83% printing and dyeing sludge, drops to water ratio below 50%, for the following process of printing and dyeing sludge is disposed the condition of providing convenience;
(5) utilize the present invention to handle printing and dyeing sludge,, needn't pass through technologies such as digestion, thereby can practice thrift great amount of investment, landfill land used and running cost thereof owing to can directly carry out the fast deep dehydration;
(6) the present invention can adopt the conventional equipment facility, is directly installed on treatment of dyeing wastewater factory and uses;
(7) installations and facilities required for the present invention, one-time investment is few, and production cost is low, and floor space is few, and the construction period is short, and operating environment is good, is easy to grasp operation.
The present invention is suitable for big-and-middle-sized printing and dyeing enterprise and uses.
Embodiment
Below in conjunction with embodiment the present invention is described further.
It is 93% technical grade sulfuric acid that the used technical grade sulfuric acid of each embodiment is mass concentration; Used technical grade sodium sulphite medicament is the technical grade sodium sulphite medicament that sodium sulfide content is 67wt%.
Embodiment 1
The printing and dyeing sludge sample is taken from the waste water treatment plant of Lanxi, Zhejiang printing and dyeing enterprise, and water ratio is 78.5%, and solid content is 21.5%, and treatment process comprises the steps:
(1) printing and dyeing sludge pre-treatment: 5.0 Kg printing and dyeing sludges are put into beaker, in beaker, add 0.1L technical grade sulfuric acid then, stir 30 min, form solidliquid mixture;
(2) microwave heating: step (1) gained solidliquid mixture sent into be warming up to 90 ℃ in the microwave device, insulation 60min;
(3) filter: will filter through the solidliquid mixture that step (2) is handled, carry out solid-liquid separation, get sludge silt and filtrating;
(4) separate out heavy metal: with sodium hydroxide solution step (3) gained filtrating pH value is adjusted to 7.0, adds 20g technical grade sodium sulphite medicament then, stir 20min, refilter, get clear filtrate and the filter residue that contains heavy metal;
(5) the final processing: the Sewage treatment systems with step (4) gained clear filtrate is sent treatment of dyeing wastewater factory back to the oven dry of step (4) gained filter residue, focuses on according to existing standard more separately.
In different seasonal; Carrying out four sub-samplings respectively according to the aforesaid operations step handles; Each printing and dyeing sludge weight of handling is 5.0 Kg, but processing parameter adjusts to some extent, and the concrete processing parameter of each step sees table 1 for details; Handle the weight in wet base and the dry weight of back gained sludge silt and see table 2, the heavy metal content before and after printing and dyeing sludge is handled is seen table 3.
Heavy metal content contrast in the gained printing and dyeing sludge before and after table 3 four sub-samplings are handled
(unit: mg/Kg)
Explain: in " textile dyeing and finishing industrial water pollution thing emission standard " (GB 4287-92); Only clearly stipulated the discharge of wastewater whereabouts of textile dyeing and finishing enterprise; Divide the time limit to stipulate the highest permission emission concentration of textile dyeing and finishing industrial water pollution thing and quantity discharged; The discharge index of the printing and dyeing sludge of clearly not stipulating to produce after the wastewater treatment of textile dyeing and finishing enterprise, therefore with reference to " town sewage is handled a pollutant emission standard " (GB18918-2002) in the highest permission content on acid soil of regulation contrast.
Visible by table 2, after employing the present invention handled printing and dyeing sludge, the water ratio in the gained sludge silt significantly reduced.Visible by table 3; The plurality of heavy metal that is contained in the printing and dyeing sludge is removed; Its content well below " town sewage handle a pollutant emission standard " (GB18918-2002) in the highest permission content on acid soil of regulation, thereby make gained dewatered sludge slag can carry out follow-up safety, environmental protection processing is disposed.
Embodiment 2
The printing and dyeing sludge sample is taken from the waste water treatment plant of Guangdong Zhong Shan printing and dyeing enterprise, and water ratio is 82.4%, and solid content is 17.6%.Carry out three experiments continuously and handle, printing and dyeing sludge 2.0Kg is got in each experiment.Treatment step is with embodiment 1, and the concrete processing parameter of each step is seen table 4, handles the weight in wet base and the dry weight of back gained sludge silt and sees table 5, and the heavy metal content before and after printing and dyeing sludge is handled is seen table 6.
Contained heavy metal average content contrast before and after the processing that continuous three experiments of table 6 obtain
(unit: mg/Kg)
| Composition | Cu | Pb | Zn | Ni | Hg | Cd | Cr | As |
| Average content before handling | 819.57 | 462.8 | 2512 | 215.3 | 4.85 | 18.21 | 485.2 | 58.6 |
| Handle the back average content | 33.62 | 15.76 | 162.32 | 19.47 | 1.92 | 2.64 | 21.22 | 14.51 |
| The GB18918-2002 standard-required | 800 | 300 | 2000 | 100 | 5 | 5 | 600 | 75 |
Visible by table 5, after employing the present invention handled printing and dyeing sludge, the water ratio in the gained sludge silt reduced greatly.Visible by table 6; The plurality of heavy metal that is contained in the printing and dyeing sludge is removed; Its content well below " town sewage handle a pollutant emission standard " (GB18918-2002) in the highest permission content on acid soil of regulation, thereby make gained dewatered sludge slag can carry out follow-up safety, environmental protection processing is disposed.
Difference along with different printing and dyeing enterprise and printing-dyeing waste water treatment process thereof; Each processing parameter can be adjusted according to practical operation situation in the inventive method; Therefore; Under the prerequisite of essence of the present invention;
makes some changes to each selection of process parameters of the present invention, still belongs to protection scope of the present invention.
Claims (1)
1. a printing and dyeing sludge treatment process that removes heavy metal and dehydration is characterized in that, may further comprise the steps:
(1) pre-treatment: the ratio that in mass concentration is the mass ratio 0.02-0.2:1 of 93% technical grade sulfuric acid and printing and dyeing sludge adds technical grade sulfuric acid in printing and dyeing sludge, stirs and reacts, and churning time is 5-100min, after the stirring, forms solidliquid mixture;
(2) microwave heating: step (1) gained solidliquid mixture is warming up to 35-120 ℃, insulation 5-100min; Heavy metal compound in the printing and dyeing sludge dissolves under the promoter action of microwave heating;
(3) filter: will filter through the solidliquid mixture after step (2) is handled, and carry out solid-liquid separation, and get sludge silt and the filtrating of water ratio below 50%;
(4) separate out heavy metal: step (3) gained pH value of filtrate is adjusted to 7.0-9.5 with sodium hydroxide solution; Mass ratio in technical grade sodium sulphite medicament and printing and dyeing sludge is the ratio adding technical grade sodium sulphite medicament of 0.004-0.02:1 then; Stir 15-35min; Filter again, get clear filtrate and the filter residue that contains heavy metal;
The technical grade sodium sulphite medicament that said technical grade sodium sulphite medicament is Containing Sulfur sodium 67wt%;
(5) the final processing: the Sewage treatment systems with step (4) gained clear filtrate is sent treatment of dyeing wastewater factory back to the oven dry of step (4) gained filter residue, focuses on according to existing standard then separately.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449628A (en) * | 2013-08-05 | 2013-12-18 | 上海电力学院 | Method for removing phosphorus in concentred and dewatered sludge water by virtue of deeply-dewatered sludge water |
| CN104402179A (en) * | 2014-11-28 | 2015-03-11 | 北京交通大学 | Method for passivating heavy metal in municipal sludge by adopting urea as passivator |
| CN104529100A (en) * | 2014-11-28 | 2015-04-22 | 北京交通大学 | City sludge heavy metal quantitative reduction method by using phosphoric acid as eluting agent |
| CN105668953A (en) * | 2014-11-19 | 2016-06-15 | 湖南鑫恒环境科技有限公司 | Innocent treatment method of dyeing sludge |
| CN106396333A (en) * | 2016-11-15 | 2017-02-15 | 墨宝股份有限公司 | Dehydration method for sludge from sewage treatment |
| CN106430728A (en) * | 2016-11-15 | 2017-02-22 | 墨宝股份有限公司 | Sludge drying and sewage treatment method |
| CN106430136A (en) * | 2016-09-08 | 2017-02-22 | 张国闽 | Method for recovering phosphorus and removing heavy metals from sludge separate incineration ash residues |
| CN109437508A (en) * | 2018-12-17 | 2019-03-08 | 苏州比雷艾斯电子科技有限公司 | A kind of printing and dyeing sludge processing system removing heavy metal and water removal |
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| CN100999371A (en) * | 2007-01-15 | 2007-07-18 | 丁四宜 | Treatment method of nickel cadmium calcium battery mud |
| CN101172688A (en) * | 2007-09-28 | 2008-05-07 | 浙江工商大学 | Method for removing heavy metal in electroplating waste |
| CN101948225A (en) * | 2010-09-14 | 2011-01-19 | 长沙洁湘环保工程有限公司 | Method for quickly dewatering and effectively removing heavy metals from primary sludge |
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Patent Citations (3)
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| CN100999371A (en) * | 2007-01-15 | 2007-07-18 | 丁四宜 | Treatment method of nickel cadmium calcium battery mud |
| CN101172688A (en) * | 2007-09-28 | 2008-05-07 | 浙江工商大学 | Method for removing heavy metal in electroplating waste |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449628A (en) * | 2013-08-05 | 2013-12-18 | 上海电力学院 | Method for removing phosphorus in concentred and dewatered sludge water by virtue of deeply-dewatered sludge water |
| CN103449628B (en) * | 2013-08-05 | 2015-09-30 | 上海电力学院 | Deep dehydration sludge water is utilized to remove the method for phosphorus in thickening sludge water |
| CN105668953A (en) * | 2014-11-19 | 2016-06-15 | 湖南鑫恒环境科技有限公司 | Innocent treatment method of dyeing sludge |
| CN105668953B (en) * | 2014-11-19 | 2018-03-27 | 湖南鑫恒环境科技有限公司 | A kind of method of printing and dyeing sludge harmless treatment |
| CN104402179A (en) * | 2014-11-28 | 2015-03-11 | 北京交通大学 | Method for passivating heavy metal in municipal sludge by adopting urea as passivator |
| CN104529100A (en) * | 2014-11-28 | 2015-04-22 | 北京交通大学 | City sludge heavy metal quantitative reduction method by using phosphoric acid as eluting agent |
| CN106430136A (en) * | 2016-09-08 | 2017-02-22 | 张国闽 | Method for recovering phosphorus and removing heavy metals from sludge separate incineration ash residues |
| CN106430136B (en) * | 2016-09-08 | 2018-04-27 | 张国闽 | Phosphorus and the method for removing removing heavy metals are recycled in a kind of independent incineration residue from sludge |
| CN106396333A (en) * | 2016-11-15 | 2017-02-15 | 墨宝股份有限公司 | Dehydration method for sludge from sewage treatment |
| CN106430728A (en) * | 2016-11-15 | 2017-02-22 | 墨宝股份有限公司 | Sludge drying and sewage treatment method |
| CN109437508A (en) * | 2018-12-17 | 2019-03-08 | 苏州比雷艾斯电子科技有限公司 | A kind of printing and dyeing sludge processing system removing heavy metal and water removal |
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Application publication date: 20120620 |