CN101575162A - Method for treating wastewater of fibre-board plant - Google Patents
Method for treating wastewater of fibre-board plant Download PDFInfo
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- CN101575162A CN101575162A CNA2009101141383A CN200910114138A CN101575162A CN 101575162 A CN101575162 A CN 101575162A CN A2009101141383 A CNA2009101141383 A CN A2009101141383A CN 200910114138 A CN200910114138 A CN 200910114138A CN 101575162 A CN101575162 A CN 101575162A
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Abstract
The invention discloses a method for treating wastewater of a fibre-board plant. The method is characterized by including the combination of technical skills of the following three parts: a pretreatment system, a biochemical treatment system and an aftertreatment system; wastewater from production is respectively led into a filter and a centrifuger; after being processed by the step of slag removal, the wastewater flows into a horizontal sedimentation tank, a pre-aeration regulation tank and an iron aeration tank or a vertical sedimentation tank and then is processed by dissolved air flotation; the discharged water is respectively pumped into a turn-back flow anaerobic tank with filter materials and an oxidation tank and then flows into an inclined-tube sedimentation tank to settle; and after suspended substances in the wastewater are removed by a filtration tank, the wastewater is discharged while reaching standards. The method has the advantages that the efficiency of removing the suspended substances is high, water is circularly and repeatedly used, water consumption is reduced, the discharge amount of the wastewater can be reduced by more than 300 tons each day, the occupation of land of equipment is low, the operation is simple, and the running cost is low. Extruded wood slag and sludge can be used as energy to be led into an energy centre to combust, secondary pollution is not caused, and the treated wastewater can meet the requirement of primary standard in the Integrated Wastewater Discharge Standard GB8978-1996.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment of artificial liner enterprise, especially relate to the combined method that the production wastewater treatment that is applied to the fibre-board plant adopts pre-treatment, biochemical treatment and after-treatment system.
Background technology
China's medium density fibre board (MDF) production capacity reached more than 3,000 ten thousand m in 2008
3, rank first in the world.The continuous flat apparatus for production line advanced person who introduced in recent years wherein, investment cost is big.Adopt the defibrator process fiber separation technology of band washing wood chip technology, equipment attrition is little, and fiber quality is good, and product is towards high-end market, added value height.But the washing wood chip produces a large amount of factory effluents, and factory effluent has the suspension content height, the COD height, and colourity is dark, the characteristics that bio-refractory is handled.Wastewater treatment becomes one of domestic and international fiberboard manufacturing concern very stubborn problem.
The combined method of materialization separation and biochemical treatment is generally adopted in the wastewater treatment of fiberboard manufacturing concern both at home and abroad at present, many, the complex process of operation, and the design residence time is longer, and equipment volume is big, takes up an area of extensively, and one-time investment is very big, makes enterprise be difficult to bear.
Summary of the invention
The invention provides the wastewater treatment combined method that a cover fiberboard enterprise produces, it is less to have a facility investment, and working cost is low, the characteristics of good waste water treatment effect.Waste water principal pollutant mass-energy after treatment enough reaches primary standard among " integrated wastewater discharge standard " GB8978-1996.
The technical solution used in the present invention is:
Comprise the combination of following three part Technologies: pretreatment system, biochemical treatment system, after-treatment system;
(1) pretreatment system: factory effluent enters strainer, whizzer respectively, after the slagging-off, flows into horizontal sedimentation tank, pre-exposure equalizing tank, iron aeration tank or vertical sedimentation tank, again through air supporting machine air-dissolving air-float;
(2) biochemical treatment system: water outlet pumps into band filtrate baffling type anaerobic pond, oxidation pond after pre-treatment, carries out nitration treatment simultaneously;
(3) after-treatment system: the biochemical treatment water outlet adds alum liquor through mixing tank reaction decolouring, flows into the tube settler sedimentation again, remove suspended matter in the water through the filter tank after, qualified discharge.
Waste water pretreatment system after filtration, the most of waste water recycling in centrifugal slagging-off back is in the washing wood chip.
Sewage treatment technology process of the present invention is seen accompanying drawing.
1, the technical process explanation is as follows successively:
Workshop Production waste water enters strainer, whizzer respectively, after filtration, materials such as the centrifugal fixing fillet that comes out, fiber, bark, silt particle form the slag of water ratio≤75%, send into energy centre and burn, the water outlet major part is back to the washing wood chip after separating body refuse, saves a large amount of waters.Water outlet flows into horizontal sedimentation tank, and precipitation removes that proportion is bigger, easy sedimentary suspended substance etc., and water outlet flows into equalizing tank, regulating pondage, balanced water quality has aeration agitation in the equalizing tank, remove the volatile organic matter that lixiviate goes out from wood chip by aeration, and oxidation interrupts the partial organic substances macromole.Water outlet pumps into vertical sedimentation tank, applies general suspended substance of polymeric aluminum chlorides solution and proportion and larger molecular organics flocculation sediment and separates out, and removes most suspended substances, goes out water suspension less than 2000mg/l.Through water sample analysis, contain polymer hard-degraded substances such as a large amount of suspension xylogen, fine-fibered, tannins compound, resin compound in the waste water, this class material has certain toxicity to anaerobion, can reduce processing efficiency greatly if directly enter anaerobic pond, and contain smaller, the difficult settled material of part proportion in the waste water, therefore select for use efficient part dissolved air flotation to handle, less, the difficult settled suspended substance air supporting of contrast anharmonic ratio is separated out and is reached the removal purpose, alleviates the biochemical treatment load of follow-up structures.Pond in the middle of the air supporting water outlet enters, enter the ABR anaerobic reation pool through the pump lifting, waste water is during successively by the sludge blanket that suspends and filter material layer, wherein organism will contact and obtain degraded with the microorganism on mud and the microbial film, macromolecular substance in the water can be decomposed into small-molecule substance through anaerobion, improve the biodegradability of waste water, reduce operation energy consumption.The anaerobism water outlet flows into contact-oxidation pool and carries out aerobic treatment, is covered with filler in the pond, overworks microbial film on the filler, and top microorganism carries out biological metabolism to sewage under the condition of aerobic decomposes, and removes the organism in the water.The main source of the gas of oxidation pond is a gas blower, and the aerating system of gas blower at the bottom of by the pond provides oxygen in oxidation pond, and it is required to supply with microorganism, keeps the good oxygen condition of system.Water outlet adds alum liquor through mixing tank reaction flocculation, decolouring, flow into the tube settling sedimentation again and carry out solid-liquid separation, the filtering fine quartz sand of water outlet inflow valveless filtering pool removes by filter the suspended matter in the water, through the water quality of above-mentioned technology advanced treatment, last water outlet reaches the primary standard discharging among " integrated wastewater discharge standard " GB8978-1996.
Pretreatment system:, remove the water-saving technology that most of water behind the wooden slag, staple fibre, silt particle of big material is back to use the washing wood chip by arc sieve strainer, whizzer; Remove the bigger particle of proportion in the suspended substance by advection sedimentation then, water outlet flows to the pre-exposure equalizing tank and removes the volatile organic matter that lixiviate goes out from wood chip by aeration, and oxidation interrupts the partial organic substances macromole; The iron ion reaction that water outlet flows into iron aeration tank and oxidation reaches decolouring reduction colourity, or water outlet flows to perpendicular stream precipitation, separate out by applying general suspended substance of polymeric aluminum chlorides solution and proportion and larger molecular organics reaction generation chemical precipitation, water outlet flows to the air supporting machine, by the air-dissolving air-float mode smaller, the difficult settled suspended substance air supporting of proportion is separated out to reach the purification purpose.
Biochemical treatment system: water outlet pumps into the water distributor evenly distribute to band filtrate baffling type anaerobic pond (ABR) after pre-treatment, when water during successively by the sludge blanket that suspends and filter material layer, wherein organism will contact with the microorganism on mud and the microbial film and obtain to degrade.Water outlet enters syllogic contact Aerobic Pond, and the major function structures as wastewater treatment are covered with filler in the pond, overwork microbial film on the filler, and top microorganism carries out aerobic decomposition to sewage under the condition of aerobic.
After-treatment system: the biochemical treatment water outlet adds alum liquor through mixing tank reaction decolouring, flow into the tube settling sedimentation again, water outlet is after the fine quartz sand of valveless filtering pool removes by filter suspended matter in the water, and water outlet reaches the primary standard discharging among " integrated wastewater discharge standard " GB8978-1996.
2, mud flow process
The wooden slag that strainer, centrifugal device filter out goes boiler to make energy fuel after the mummification of stock ground.
The excess sludge of the mud of vertical sedimentation tank, the scum silica frost of air flotation pool, ABR anaerobic pond and the mud of settling tank are discharged to concentration basin, form the mud cake of water ratio 70%～80% through the pressure filter dehydration, outward transport or send our factory's energy centre to make energy fuel, supernatant liquor refluxes and to enter the horizontal sedimentation tank re-treatment.
Particularly: factory effluent after filtration, major part is back to use washing wood chip technology behind the centrifugal removal suspended substance, has reduced the use of fresh water, day saves tap water more than 300 tons.
Particularly: biochemical treatment system has adopted the ABR anaerobic treatment unit of band filtrate, characteristics are the thickness that has reduced filter material layer, between pond base fabric water system and filter material layer, reserved certain space, accumulation so that the floc sludge of suspended state and granule sludge can be grown therein.When water during successively by the sludge blanket that suspends and filter material layer, wherein organism will contact with the microorganism on mud and the microbial film and obtain to degrade.This reactor that combines baffling type anaerobic reactor and anaerobic biofilter characteristics has the height that following advantage: a. has reduced filter material layer, reduces the blocked possibility in filter tank.B. can increase biosolids amount total in the reactor.
Advantage of the present invention is:
1. the pretreatment system of combined technology for wastewater treatment technology of the present invention to suspended substance removal efficient height, has promoted the circulation repeat usage of washing water, saves tap water consumption, and the factory effluent quantity discharged reduces more than 300 tons every day.
2. behind the combined technology for wastewater treatment technology one-time investment of the present invention, equipment takes up an area of little, easy and simple to handle, and working cost is low.
3. combined technology for wastewater treatment technology of the present invention has been started the new situation of Fibreboard Production waste water treatment process.Utilize combined technology for wastewater treatment technology of the present invention, can alleviate the difficulty of fibre-board plant's wastewater treatment greatly, the waste water index of processing can reach the requirement of the primary standard among " integrated wastewater discharge standard " GB8978-1996.
4. adopt band filtrate ABR anaerobic pond.Band filtrate ABR anaerobic pond is in recent years according to for many years engineering experience, at the characteristics of wood industry waste water, the anaerobic pond of a kind of special construction of exploitation.The macromolecule organic that contains difficult degradation for processing has good especially effect.
5. the treatment process that adopts air supporting-anaerobic-aerobic to combine, the system volume load is big, has stronger anti impulsion load ability, can save operation energy consumption.
6. the wooden slag sludge that comes out of extruding can be used as the energy and delivers to the energy centre burning, can realize certain economic benefit.Non-secondary pollution has been realized cleaning and carrying out production strictly in line with rules and regulations.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is a mud schema of the present invention.
Embodiment
Embodiment 1
Factory effluent is by arc sieve strainer, whizzer, after removing the material such as wooden slag, staple fibre, silt particle of big material, most of waste water recycling is to the washing wood chip, and water outlet is to horizontal sedimentation tank, pre-exposure equalizing tank, the iron aeration tank, air supporting, ABR anaerobic treatment, syllogic contact-oxidation pool, tube settler, the cell process combination of valveless filtering pool.
Each cell processing technic index situation and explanation:
Adopt the Waste Water Treatment of aforesaid combination technology, handle back effluent quality depth index and meet " integrated wastewater discharge standard " first discharge standard in (GB8978-1996), main water-quality guideline:
| Project | Numerical value | Project | Numerical value |
| CODcr | ＜100mg/L | pH | 6～9 |
| BOD 5 | ＜20mg/L | SS | ＜70mg/L |
Adopt the aforesaid combination Technology, saved the tap water consumption, arranged factory effluent less, the present invention has played strong promoter action to the energy-saving and emission-reduction that country advocates.Adopt the iron aeration tank that the macromole pigment that extracts in the timber is had fine Decomposition simultaneously, it is better to remove chromatic effect.Save fresh 90,000 tons in the tap water of using waste water recycling year, 90,000 tons of young process for producing waste water, 55.8 ten thousand yuan of year saving working costs, remarkable benefit.
Embodiment 2
This routine factory effluent is through separating slag rear section reuse, and water outlet is to advection sedimentation, and the pre-exposure equalizing tank erects the stream precipitation, air supporting, ABR anaerobic treatment, syllogic contact-oxidation pool, tube settler, the cell process combination of valveless filtering pool.
Each cell processing technic index situation:
Adopt the Waste Water Treatment of aforesaid combination technology, handle back effluent quality depth index and meet " integrated wastewater discharge standard " first discharge standard in (GB8978-1996), main water-quality guideline:
| Project | Numerical value | Project | Numerical value |
| CODcr | ＜100mg/L | pH | 6～9 |
| BOD 5 | ＜20mg/L | SS | ＜70mg/L |
Adopt the aforesaid combination Technology, saved the tap water consumption, arranged factory effluent less, the present invention has played strong promoter action to the energy-saving and emission-reduction that country advocates.Adopt the vertical sedimentation tank clearance of dosing higher simultaneously, the resistance to overload shock ability is stronger, moves more stable.Save fresh 90,000 tons in the tap water of using waste water recycling year, 90,000 tons of young process for producing waste water, 55.8 ten thousand yuan of year saving working costs, remarkable benefit.
Claims (2)
1, a kind of method for treating wastewater of fibre-board plant is characterized in that comprising the combination of following three part Technologies: pretreatment system, biochemical treatment system, after-treatment system;
(1) pretreatment system: factory effluent enters strainer, whizzer respectively, after the slagging-off, flows into horizontal sedimentation tank, pre-exposure equalizing tank, iron aeration tank or vertical sedimentation tank, again through air supporting machine air-dissolving air-float;
(2) biochemical treatment system: water outlet pumps into band filtrate baffling type anaerobic pond, oxidation pond after pre-treatment, carries out nitration treatment simultaneously;
(3) after-treatment system: the biochemical treatment water outlet adds alum liquor through mixing tank reaction decolouring, flows into the tube settler sedimentation again, remove suspended matter in the water through the filter tank after, qualified discharge.
2, method of wastewater treatment according to claim 1 is characterized in that: waste water pretreatment system after filtration, the most of waste water recycling in centrifugal slagging-off back is in the washing wood chip.
Priority Applications (1)
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| CNA2009101141383A CN101575162A (en) | 2009-06-12 | 2009-06-12 | Method for treating wastewater of fibre-board plant |
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| CNA2009101141383A CN101575162A (en) | 2009-06-12 | 2009-06-12 | Method for treating wastewater of fibre-board plant |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351364A (en) * | 2011-09-01 | 2012-02-15 | 中国制浆造纸研究院 | Treatment method of wood chip washing waste water |
| CN102633379A (en) * | 2012-04-28 | 2012-08-15 | 中国矿业大学(北京) | Efficient pretreatment system for mine water |
| CN103112983A (en) * | 2013-02-19 | 2013-05-22 | 哥乐巴环保科技(上海)有限公司 | Technical process and apparatus for sewage treatment in artificial wood board production |
| CN103553274A (en) * | 2013-11-14 | 2014-02-05 | 安徽省绿巨人环境技术有限公司 | Treatment process of industrial wastewater of medium density fiber |
| CN104261634A (en) * | 2014-10-17 | 2015-01-07 | 南宁金科环境工程有限公司 | Artificial board wastewater treatment system and technology |
| CN104787983A (en) * | 2015-04-23 | 2015-07-22 | 河南鑫饰板业有限公司 | Treatment process for synthetic fiberboard production wastewater |
| CN104803560A (en) * | 2015-04-23 | 2015-07-29 | 河南鑫饰板业有限公司 | Method for manufacturing precipitated lignin from production waste water of man-made fiber boards |
| CN105016560A (en) * | 2014-04-18 | 2015-11-04 | 龙岩市绿河环保科技有限公司 | Sewage treatment system |
| CN106396301A (en) * | 2016-12-13 | 2017-02-15 | 大庆市海油庆石油科技有限公司 | Microbiological treatment device for oilfield sewage station |
| CN109422425A (en) * | 2017-08-25 | 2019-03-05 | 长沙创远环保科技有限公司 | A kind of cultivating wastewater purification method |
| CN110655271A (en) * | 2019-09-06 | 2020-01-07 | 深圳德蓝生态环境有限公司 | Integrated technology for treating wheat straw wastewater |
| CN110902953A (en) * | 2019-12-03 | 2020-03-24 | 广西金科环境工程有限公司 | Energy-saving treatment process for waste water of artificial board and wood industry |
| CN111138036A (en) * | 2020-01-16 | 2020-05-12 | 广西金科环境工程有限公司 | Novel energy-saving process for continuously treating artificial board wastewater and wood industry wastewater |
| CN112358129A (en) * | 2020-10-27 | 2021-02-12 | 成都锦汇绿源环保技术有限公司 | Hot pot material wastewater treatment process |
-
2009
- 2009-06-12 CN CNA2009101141383A patent/CN101575162A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351364A (en) * | 2011-09-01 | 2012-02-15 | 中国制浆造纸研究院 | Treatment method of wood chip washing waste water |
| CN102633379A (en) * | 2012-04-28 | 2012-08-15 | 中国矿业大学(北京) | Efficient pretreatment system for mine water |
| CN103112983A (en) * | 2013-02-19 | 2013-05-22 | 哥乐巴环保科技(上海)有限公司 | Technical process and apparatus for sewage treatment in artificial wood board production |
| CN103553274A (en) * | 2013-11-14 | 2014-02-05 | 安徽省绿巨人环境技术有限公司 | Treatment process of industrial wastewater of medium density fiber |
| CN103553274B (en) * | 2013-11-14 | 2015-04-22 | 安徽省绿巨人环境技术有限公司 | Treatment process of industrial wastewater of medium density fiber |
| CN105016560A (en) * | 2014-04-18 | 2015-11-04 | 龙岩市绿河环保科技有限公司 | Sewage treatment system |
| CN104261634A (en) * | 2014-10-17 | 2015-01-07 | 南宁金科环境工程有限公司 | Artificial board wastewater treatment system and technology |
| CN104803560A (en) * | 2015-04-23 | 2015-07-29 | 河南鑫饰板业有限公司 | Method for manufacturing precipitated lignin from production waste water of man-made fiber boards |
| CN104787983A (en) * | 2015-04-23 | 2015-07-22 | 河南鑫饰板业有限公司 | Treatment process for synthetic fiberboard production wastewater |
| CN106396301A (en) * | 2016-12-13 | 2017-02-15 | 大庆市海油庆石油科技有限公司 | Microbiological treatment device for oilfield sewage station |
| CN106396301B (en) * | 2016-12-13 | 2023-02-03 | 大庆市海油庆石油科技有限公司 | Oil field sewage station adds little biological treatment device |
| CN109422425A (en) * | 2017-08-25 | 2019-03-05 | 长沙创远环保科技有限公司 | A kind of cultivating wastewater purification method |
| CN110655271A (en) * | 2019-09-06 | 2020-01-07 | 深圳德蓝生态环境有限公司 | Integrated technology for treating wheat straw wastewater |
| CN110902953A (en) * | 2019-12-03 | 2020-03-24 | 广西金科环境工程有限公司 | Energy-saving treatment process for waste water of artificial board and wood industry |
| CN111138036A (en) * | 2020-01-16 | 2020-05-12 | 广西金科环境工程有限公司 | Novel energy-saving process for continuously treating artificial board wastewater and wood industry wastewater |
| CN112358129A (en) * | 2020-10-27 | 2021-02-12 | 成都锦汇绿源环保技术有限公司 | Hot pot material wastewater treatment process |
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Open date: 20091111 |