CN104193119A - Process for deeply treating printing and dyeing wastewater in presence of attapulgite catalyst - Google Patents
Process for deeply treating printing and dyeing wastewater in presence of attapulgite catalyst Download PDFInfo
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- CN104193119A CN104193119A CN201410499446.3A CN201410499446A CN104193119A CN 104193119 A CN104193119 A CN 104193119A CN 201410499446 A CN201410499446 A CN 201410499446A CN 104193119 A CN104193119 A CN 104193119A
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Abstract
The invention discloses a process for deeply treating printing and dyeing wastewater in the presence of an attapulgite catalyst. The process comprises the following steps: collecting the printing and dyeing wastewater subjected to biochemical treatment for the first time into an adjusting tank, adjusting the water quantity and the water quality, feeding into a coagulative precipitation tank for coagulative sedimentation treatment, feeding outlet water of the coagulative precipitation tank into an anaerobic tank for acidification and hydrolysis, performing biochemical treatment on outlet water of the anaerobic tank by adopting an anoxic-aerobic tank with the attapulgite catalyst, removing organic matters, chromaticity and ammonia nitrogen, and discharging by standard. According to the process, the attapulgite catalyst is added during the biochemical treatment of the anoxic-aerobic tank, so that the aerobic biochemical treatment capability and effect are improved, the biochemical treatment effect on difficultly treated printing and dyeing wastewater is enhanced, COD (chemical oxygen demand), chromaticity and ammonia nitrogen in the printing and dyeing wastewater are efficiently removed, and the printing and dyeing wastewater is discharged by standard; the treatment cost of the printing and dyeing wastewater is reduced, the process is convenient to perform, and the practical application of engineering and the technical improvement of existing printing and dyeing wastewater treatment engineering are facilitated.
Description
Technical field
The present invention relates to field of environment engineering technology, specifically a kind of attapulgite catalyst depth treatment of dyeing and printing technique.
Background technology
Dyeing waste water is to process the waste water that cotton, fiber crops, silk, hair, man-made fiber and blending product thereof are printing and dyeing mill's discharge of master.The dyeing waste water water yield is larger, 100～200 tons of 1 ton of textiles water consumptions of every dyeing and printing process, and wherein 80～90% become waste water.Dyeing is industrial wastewater discharge rich and influential family, and according to incompletely statistics, national dyeing waste water quantity discharged every day is 3 × 106～4 × 106 m3.It is environmental protection and energy saving (low-carbon (LC)) problems that Development of Textile Industry one of mainly hinders, and the subject matter of environmental protection is waste water, and approximately 80% textile waste comes from dyeing.Statistic data demonstration, approximately 2,300,000,000 tons of left and right of textile waste quantity discharged in 2012, occupy the 3rd of each industrial trade, account for 10.60% of national discharged volume of industrial waste water.31.4 ten thousand tons of chemical oxygen demand (COD) in textile industry waste discharge (CODCr) quantity dischargeds, occupy the 4th of each industrial trade, account for 7.76% of national trade effluent CODCr.In dyeing waste water, contain dyestuff, slurry, auxiliary agent, finish, soda acid, fiber impurity, sand class material, inorganic salt etc.The features such as textile printing and dyeing wastewater has that the water yield is large, organic pollutant content is high, alkalescence is large, colourity is high, PH is higher, and the many and change of water quality of bio-refractory thing is large, belong to one of unmanageable trade effluent;
There is at present the treatment process of physico-chemical process, biochemical process, chemical method, electrochemical process, membrane separation technique and several technique combinations for the main method for the treatment of of dyeing wastewater.Because current dyeing medium is taking water as main, so most dyestuff is all soluble in water, and because dye molecule quality is larger, most dyestuffs can form lyophilic colloid in water, make the routine decolouring of dyeing waste water become very difficult; Dyeing waste water biological degradability is poor, decolouring difficulty, and whether effectively the decolorizing effect of dyeing waste water is to evaluate method of wastewater treatment one of key index.Conventional processing approach is flocculation reflocculation, biochemical biochemical passive treatment process again, and project occupation of land area is large, long flow path, capital construction and working cost is high, treatment effect is unstable;
The progress of the rise of Silk and finishing process in printing and dye-ing technology, make the bio-refractory organism such as PVAC polyvinylalcohol slurry, artificial silk alkaline hydrolysis thing (being mainly O-phthalic acids material), New-type adjuvant enter in a large number dyeing waste water, its chemical oxygen absorbed COD concentration also rises to 2000～3000mg/L by original hundreds of mg/L, thereby make original biological treatment system COD clearance drop to 50% left and right from 70%, even lower.Traditional biological treatment has been subject to serious challenge; Traditional chemical precipitation and By Bubble-floating Method are only also 30% left and right to the COD clearance of this class dyeing waste water.Although electrochemical process, membrane separation technique treatment effect are better, because cost of investment is large, working cost is high, and general enterprises can not afford, and is also only suitable for the application of the water yield on a small scale.Especially poorer through the dyeing waste water biodegradability of first biochemical treatment, COD clearance less than 30%.Along with country and the pay attention to day by day of society to environmental protection requirement and the requirement to Sustainable development, traditional treatment process is more and more difficult to meet the requirement of production and environmental protection.Therefore the effective treatment of dyeing wastewater of exploiting economy and advanced treatment technology become the problem that current environmental protection industry (epi) is paid close attention to day by day.
Summary of the invention
The object of the invention is to, for dyeing waste water worse feature of biodegradability after first biochemical treatment, a kind of attapulgite catalyst depth treatment of dyeing and printing technique is provided, effectively improve biochemical reaction efficiency and to organic matter degradation ability, reduce cost for wastewater treatment, technological operation is convenient, is conducive to practical implementation and the technological transformation to existing treatment of dyeing wastewater flow process;
For achieving the above object, the invention provides following technical scheme:
A kind of attapulgite catalyst depth treatment of dyeing and printing technique, the dyeing waste water of first biochemical treatment is collected into equalizing tank, after the water yield and water quality regulation, pump into coagulative precipitation tank with lift pump, coagulating agent is added to coagulative precipitation tank simultaneously, mix with dyeing waste water, the kind of institute's dosing coagulant and quantity are depending on water quality and the water yield of dyeing waste water, and hydraulic detention time is greater than 1h; Coagulative precipitation tank water outlet enters anaerobic pond and carries out acidification hydrolization, and larger molecular organics is resolved into small organic molecule, and suspended solid material is hydrolyzed to soluble substance, and hydraulic detention time is greater than 2h, and water temperature is normal temperature, and higher than 10 DEG C; Anaerobic pond water outlet enters the anaerobic-aerobic pond of containing attapulgite catalyzer and processes, and wherein in Aerobic Pond, adds attapulgite catalyzer, and dosage is (1-5)/10000 of dyeing waste water volume, and hydraulic detention time is greater than 10h; The water outlet of anaerobic-aerobic pond enters second pond precipitation, and hydraulic detention time is greater than 1h, and second pond water outlet is qualified discharge after V-type filter, uv sterilisation; Excess sludge after the biochemical treatment of anaerobic-aerobic pond and the mud of coagulative precipitation tank all concentrate by sludge thickener, discharging after plate-and-frame filter press, belt frame pressure filter or centrifuge processed for mud after concentrating;
As the further scheme of the present invention: attapulgite catalyzer is made up of nano level attapulgite, carbon and catalyzer, its mass ratio is nano level attapulgite: carbon: catalyzer=1:(0.1-1.5): (0.01-0.5), the particle diameter of attapulgite catalyzer is 100 order-400 order fine powders;
As the further scheme of the present invention: adopt one or more coagulating agent in PFC, PSFC, PAM or ferrous sulfate in the time of dyeing waste water pH meta-alkalescence; In the time of dyeing waste water pH slant acidity, adopt PAC, PAM or lime-ferrous sulfate;
As the further scheme of the present invention: coagulative precipitation tank adopts flat flow or radial-flow;
As the further scheme of the present invention: Aerobic Pond is active sludge oxidation ditch, adopt the one in Carrousel oxidation ditch, three channel type oxidation channels, Orbal oxidation ditch or integral type oxidation ditch;
Compared with prior art, the invention has the beneficial effects as follows: when the present invention processes in anaerobic-aerobic pond, add attapulgite catalyzer, aerobic treatment ability and effect are strengthened, improve unmanageable dyeing waste water Biochemical Treatment, when realizing in high unmanageable dyeing waste water COD, colourity, ammonia nitrogen, efficiently remove qualified discharge.The present invention can effectively improve biochemical reaction efficiency and to organic matter degradation ability, meanwhile, reduce treatment of dyeing wastewater cost, and technological operation is convenient, is conducive to practical implementation and the technological transformation to existing treatment of dyeing wastewater engineering.
Brief description of the drawings
Fig. 1 is attapulgite catalyst depth treatment of dyeing and printing process flow sheet.
Embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention;
Refer to Fig. 1, in the embodiment of the present invention, a kind of attapulgite catalyst depth treatment of dyeing and printing technique, the dyeing waste water of first biochemical treatment is collected into equalizing tank, after the water yield and water quality regulation, enter into coagulative precipitation tank coagulating sedimentation and process removal partial organic substances, coagulative precipitation tank water outlet enters anaerobic pond and carries out acidification hydrolization, larger molecular organics is resolved into small organic molecule and improve biodegradability, anaerobic pond effluent adopting anaerobic-aerobic attapulgite catalysis biochemical treatment, qualified discharge after removal organism, colourity and ammonia nitrogen; Attapulgite catalyzer is made up of nano level attapulgite, carbon and catalyzer, and its mass ratio is nano level attapulgite: carbon: catalyzer=1:(0.1-1.5): (0.01-0.5);
Concrete steps are as described below: dyeing waste water is collected into equalizing tank after the water yield and water quality regulation, pump into coagulative precipitation tank with lift pump, coagulating agent is added to coagulative precipitation tank simultaneously, mix with dyeing waste water, the kind of institute's dosing coagulant and quantity are depending on water quality and the water yield of dyeing waste water, and hydraulic detention time is greater than 1h.Generally in the time of dyeing waste water pH meta-alkalescence, adopt one or more coagulating agent in PFC, PSFC, PAM or ferrous sulfate; In the time of dyeing waste water pH slant acidity, adopt PAC, PAM, lime-ferrous sulfate or other coagulating agent.Coagulative precipitation tank adopts flat flow or radial-flow.Flat flow coagulative precipitation tank floor space is large, simple in structure, and cost is lower; Radial-flow coagulative precipitation tank floor space is little, complex structure, and cost is higher.It is concentrated that the mud of coagulative precipitation tank enters sludge thickener, plate-and-frame filter press, belt frame pressure filter or centrifuge processed for mud after concentrating;
Coagulative precipitation tank water outlet enters anaerobic pond and carries out acidification hydrolization, larger molecular organics is resolved into small organic molecule and improve biodegradability.Meanwhile, suspended solid material is hydrolyzed to soluble substance, can improve COD clearance.Hydraulic detention time is greater than 2h, and water temperature is normal temperature, but will be advisable higher than 10 DEG C;
Anaerobic pond water outlet enters the anaerobic-aerobic pond of containing attapulgite catalyzer and processes, hydraulic detention time is greater than 10h, the recirculation water mixing that refluxes next at the Aerobic Pond of anoxic Duan Yucong attapulgite catalyzer, form anaerobic environment, produce anti-nitration reaction, the nitrite producing in aerobic processes become to dinitrogen and denitrogenation with nitrate reduction:
4NO
3 -+4H
++5CH
2O=5CO
2+2N
2+7H
2O
Aerobic Pond is active sludge oxidation ditch, selects the one in Carrousel oxidation ditch, three channel type oxidation channels, Orbal oxidation ditch, integral type oxidation ditch, and its aeration tank is the ditch rectangle of sealing, and the mixed solution of sewage and active sludge constantly circulates therein.In Aerobic Pond, add attapulgite catalyzer, dosage is (1-5)/10000 of dyeing waste water volume.Attapulgite catalyzer is made up of nano level attapulgite, carbon and catalyzer, its mass ratio is nano level attapulgite: carbon: catalyzer=1:(0.1-1.5): (0.01-0.5), it is 100 order-400 order fine powders that attapulgite catalyzer is processed into particle diameter.Attapulgite is for containing Shuifu County's magnesia-aluminium silicate fibre shape clay mineral, and particle is small, and attapulgite crystal diameter is 20-40nm, is nano material; Attapulgite has the micropore canals of growth, and sectional area is 3.8A*6.3A, thereby has very large internal surface area, and the internal surface area of attapulgite is 580-620m
2/ g, outer surface area is 280-320m
2/ g, shows good physicochemical property, is mainly manifested in the aspects such as rheological, adsorptivity and catalytic.The attapulgite catalyzer being made up of nano level attapulgite, carbon and catalyzer, has strengthened catalytic effect more.Utilize the attapulgite catalyzer of attapulgite development to there is very strong purification function to processing various high concentrated organic wastewaters, unmanageable dyeing waste water and sanitary sewage, the organic pollutant Catalytic Oxygen in waste water can be changed into carbonic acid gas and water and remove.In Aerobic Pond, attapulgite catalyzer and active sludge mix, and have improved sludge concentration, and can be together with active sludge Reusability;
The water outlet of anaerobic-aerobic pond enters second pond precipitation, and hydraulic detention time is greater than 1h, and second pond water outlet is qualified discharge after V-type filter, uv sterilisation.The excess sludge that biochemical treatment is carried out in anaerobic-aerobic pond concentrates by sludge thickener, discharging after plate-and-frame filter press, belt frame pressure filter or centrifuge processed for mud after concentrating;
The present invention depending on dyeing waste water water quality and quantity, adds different coagulating agent and dosage improve coagulating sedimentation effect to different difficult dyeing waste waters in the kind of coagulative precipitation tank institute dosing coagulant and quantity; While processing in anaerobic-aerobic pond, reflux by anaerobic-aerobic pond, form anaerobic environment, produce anti-nitration reaction, the nitrite producing in aerobic processes is become to dinitrogen and denitrogenation with nitrate reduction; In Aerobic Pond, there is very strong purification function to processing various high concentrated organic wastewaters, unmanageable dyeing waste water and sanitary sewage, the organic pollutant Catalytic Oxygen in dyeing waste water can be changed into carbonic acid gas and water and removes;
Embodiment 1
Certain printing and dyeing mill's dyeing waste water advanced treatment implementation step;
(1) from equalizing tank, press 150m with lift pump
3/ h flow pumps into radial-flow coagulative precipitation tank, adds respectively copperas solution, the milk of lime of 10% concentration by 0.3% dyeing waste water amount, after fully mixing, enters radial-flow coagulative precipitation tank coagulating sedimentation, hydraulic detention time 2h;
(2) 150m is pressed in the water outlet of radial-flow coagulative precipitation tank
3/ h flow pumps into anaerobic pond and carries out acidification hydrolization, hydraulic detention time 4h;
(3) anaerobic pond water outlet enters the anaerobic-aerobic pond processing that contains attapulgite catalyzer, and in anaerobic-aerobic pond, adding a dosage of attapulgite catalyzer is 5m
3.Hydraulic detention time 24h, biochemical system return sludge ratio is 1.0;
(4) water outlet of anaerobic-aerobic pond enters second pond precipitation, hydraulic detention time 2h;
(5) second pond water outlet qualified discharge after V-type filter, uv sterilisation;
Embodiment 2
Certain printing and dyeing mill's dyeing waste water advanced treatment implementation step;
(1) from equalizing tank, press 250m with lift pump
3/ h flow pumps into radial-flow coagulative precipitation tank, adds respectively the PAC of 10% concentration by 0.03% dyeing waste water amount, and PAM enters radial-flow coagulative precipitation tank coagulating sedimentation, hydraulic detention time 2h after fully mixing;
(2) 250m is pressed in the water outlet of radial-flow coagulative precipitation tank
3/ h flow pumps into anaerobic pond and carries out acidification hydrolization, hydraulic detention time 4h;
(3) anaerobic pond water outlet enters the anaerobic-aerobic pond processing that contains attapulgite catalyzer, and in anaerobic-aerobic pond, adding a dosage of attapulgite catalyzer is 10m
3.Hydraulic detention time 24h, biochemical system return sludge ratio is 1.0;
(4) water outlet of anaerobic-aerobic pond enters second pond precipitation, hydraulic detention time 2h;
(5) second pond water outlet qualified discharge after V-type filter, uv sterilisation;
Embodiment 1-2 treatment of dyeing wastewater test result is as shown in table 1, and in the dyeing waste water after attapulgite catalyst depth treatment of dyeing and printing art breading, COD significantly reduces, and colourity reduces;
Table 1
| Title | The former water of COD (mg/L) | COD (mg/L) anoxic-aerobic second pond water outlet | The former water of colourity (dilution doubly) | Colourity (dilution doubly) anoxic-aerobic second pond water outlet |
| Embodiment 1 | 500 | 48 | 200 | 24 |
| Embodiment 2 | 414 | 36 | 185 | 25 |
In sum, when the present invention processes in anaerobic-aerobic pond, add attapulgite catalyzer, aerobic treatment ability and effect are strengthened, improve unmanageable dyeing waste water Biochemical Treatment, when realizing in high unmanageable dyeing waste water COD, colourity, ammonia nitrogen, efficiently remove qualified discharge.The present invention can effectively improve biochemical reaction efficiency and to organic matter degradation ability, meanwhile, reduce treatment of dyeing wastewater cost, and technological operation is convenient, is conducive to practical implementation and the technological transformation to existing treatment of dyeing wastewater engineering;
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned example embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other specific form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to include in the present invention;
In addition, be to be understood that, although this specification sheets is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of specification sheets is only for clarity sake, those skilled in the art should make specification sheets as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (5)
1. an attapulgite catalyst depth treatment of dyeing and printing technique, it is characterized in that, the dyeing waste water of first biochemical treatment is collected into equalizing tank, after the water yield and water quality regulation, pump into coagulative precipitation tank with lift pump, coagulating agent is added to coagulative precipitation tank simultaneously, mix with dyeing waste water, the kind of institute's dosing coagulant and quantity are depending on water quality and the water yield of dyeing waste water, and hydraulic detention time is greater than 1h; Coagulative precipitation tank water outlet enters anaerobic pond and carries out acidification hydrolization, and hydraulic detention time is greater than 2h, and water temperature is normal temperature, and higher than 10 DEG C; Anaerobic pond water outlet enters the anaerobic-aerobic pond of containing attapulgite catalyzer and processes, and wherein in Aerobic Pond, adds attapulgite catalyzer, and dosage is (1-5)/10000 of dyeing waste water volume, and hydraulic detention time is greater than 10h; The water outlet of anaerobic-aerobic pond enters second pond precipitation, and hydraulic detention time is greater than 1h; Second pond water outlet is qualified discharge after V-type filter, uv sterilisation; Excess sludge after the biochemical treatment of anaerobic-aerobic pond and the mud of coagulative precipitation tank all concentrate by sludge thickener, discharging after plate-and-frame filter press, belt frame pressure filter or centrifuge processed for mud after concentrating.
2. attapulgite catalyst depth treatment of dyeing and printing technique according to claim 1, it is characterized in that, described attapulgite catalyzer comprises nano level attapulgite, carbon and catalyzer, its mass ratio is nano level attapulgite: carbon: catalyzer=1:(0.1-1.5): (0.01-0.5), the particle diameter of attapulgite catalyzer is 100 order-400 order fine powders.
3. attapulgite catalyst depth treatment of dyeing and printing technique according to claim 1, is characterized in that, adopts one or more coagulating agent in PFC, PSFC, PAM or ferrous sulfate in the time of dyeing waste water pH meta-alkalescence; In the time of dyeing waste water pH slant acidity, adopt PAC, PAM or lime-ferrous sulfate.
4. attapulgite catalyst depth treatment of dyeing and printing technique according to claim 1, is characterized in that, described coagulative precipitation tank adopts flat flow or radial-flow.
5. attapulgite catalyst depth treatment of dyeing and printing technique according to claim 1, is characterized in that, Aerobic Pond is active sludge oxidation ditch, adopts the one in Carrousel oxidation ditch, three channel type oxidation channels, Orbal oxidation ditch or integral type oxidation ditch.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986916A (en) * | 2015-06-08 | 2015-10-21 | 河北先达环保工程有限公司 | Process for treating coating waste water of paper making |
| CN105948377A (en) * | 2015-12-30 | 2016-09-21 | 天津市顶鑫源纺织材料有限公司 | Recycling apparatus and recycling method for treating printing and dyeing wastewater |
| CN106007270A (en) * | 2016-08-04 | 2016-10-12 | 迈邦（北京）环保工程有限公司 | Printing and dyeing sewage treatment method and printing and dyeing sewage treatment system |
| CN106630481A (en) * | 2017-01-18 | 2017-05-10 | 安徽龙科环保科技有限公司 | Technology for deep-treating printing and dyeing wastewater by attapulgite catalyst |
| CN106955688A (en) * | 2017-04-14 | 2017-07-18 | 明光市安盛非金属材料厂 | A kind of method of preparation and use of attapulgite catalytic oxidant |
| CN109836019A (en) * | 2019-04-03 | 2019-06-04 | 平湖市三禾染整有限公司 | A kind of yarn dyeing and finishing wastewater processing equipment and its treatment process |
| CN111196663A (en) * | 2019-12-30 | 2020-05-26 | 苏州苏沃特环境科技有限公司 | Biological treatment method and device for printing and dyeing wastewater |
| CN112340929A (en) * | 2020-04-12 | 2021-02-09 | 连江明杰信息技术有限公司 | Advanced treatment method of printing and dyeing wastewater |
-
2014
- 2014-09-25 CN CN201410499446.3A patent/CN104193119A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986916A (en) * | 2015-06-08 | 2015-10-21 | 河北先达环保工程有限公司 | Process for treating coating waste water of paper making |
| CN105948377A (en) * | 2015-12-30 | 2016-09-21 | 天津市顶鑫源纺织材料有限公司 | Recycling apparatus and recycling method for treating printing and dyeing wastewater |
| CN106007270A (en) * | 2016-08-04 | 2016-10-12 | 迈邦（北京）环保工程有限公司 | Printing and dyeing sewage treatment method and printing and dyeing sewage treatment system |
| CN106630481A (en) * | 2017-01-18 | 2017-05-10 | 安徽龙科环保科技有限公司 | Technology for deep-treating printing and dyeing wastewater by attapulgite catalyst |
| CN106955688A (en) * | 2017-04-14 | 2017-07-18 | 明光市安盛非金属材料厂 | A kind of method of preparation and use of attapulgite catalytic oxidant |
| CN109836019A (en) * | 2019-04-03 | 2019-06-04 | 平湖市三禾染整有限公司 | A kind of yarn dyeing and finishing wastewater processing equipment and its treatment process |
| CN111196663A (en) * | 2019-12-30 | 2020-05-26 | 苏州苏沃特环境科技有限公司 | Biological treatment method and device for printing and dyeing wastewater |
| CN112340929A (en) * | 2020-04-12 | 2021-02-09 | 连江明杰信息技术有限公司 | Advanced treatment method of printing and dyeing wastewater |
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