CN1724414A - Process for biological decolouring of waste water of pulping - Google Patents
Process for biological decolouring of waste water of pulping Download PDFInfo
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- CN1724414A CN1724414A CN 200510035389 CN200510035389A CN1724414A CN 1724414 A CN1724414 A CN 1724414A CN 200510035389 CN200510035389 CN 200510035389 CN 200510035389 A CN200510035389 A CN 200510035389A CN 1724414 A CN1724414 A CN 1724414A
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- biochemical reactor
- whiterot fungi
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Abstract
A process for bio-de-coloring the pulping sewage includes such steps as naturalizing white rot and pulping sewage, inoculating to aerobic bioreactor, culturing, filming, and de-coloring while controlling temp and pH value. Its advantage is high de-coloring effect.
Description
Technical field
The present invention relates to a kind of method of biological decolouring of waste water of pulping, specifically relate to a kind of method of utilizing whiterot fungi that mechanical pulp waste liquid, semi-chemical pulp waste liquid, Alkaline Peroxide Mechanical Pulp waste liquid and the sulfonation machine pulp waste of different paper making raw materials effectively decoloured.
Background technology
Mechanical pulp, semi-chemical pulp, Alkaline Peroxide Mechanical Pulp and sulfonation machine slurry pulping process are the advanced pulping process methods of low pollution, high yield.Be mainly used in the TMP and the CTMP slurrying of South America and North America assortment abroad from the seventies, produce newsprinting paper, high-grade printing paper and packing board.China introduces the pulping technique and the equipment of chemimechanical pulp since the eighties, successfully is applied to SCMP (CTMP) technology (as Jilin Paper Mill, stone Xian paper mill etc.) of northern assortments such as poplar alkaline hydrogen peroxide machinery pulping (APMP) technology (as Yueyang woods paper group, Qiqihar papermaking company limited and paper mill, the Yalu River etc.), Pinus massoniana Lamb thermomechanical pulp (TMP) technology (as Guangzhou Paper Co., Ltd) and tamarack, birch at present.Because yield height, energy consumption are low, above-mentioned mechanical feedback technology has become the important development trend of pulp and paper industry.
The principal pollutant matter of mechanical pulp waste liquid, semi-chemical pulp waste liquid, Alkaline Peroxide Mechanical Pulp waste liquid and sulfonation machine pulp waste comprises part lignin molecule and degraded product, carbohydrate and degraded product thereof, the polyphenolic compound of complexity and the organic acid of low molecular mass etc. of stripping.These waste liquids have very dark color, reach 1500～4500 times, and the colourity of waste water is difficult to general chemistry or physical-chemical method such as removals such as flocculence, ultrafiltration process and biological process such as activated sludge process.Up till now, all there is not the technology and method of effective mechanical pulp waste liquid, semi-chemical pulp waste liquid, Alkaline Peroxide Mechanical Pulp waste liquid and sulfonation machine pulp waste biological decolouring both at home and abroad.
Summary of the invention
The objective of the invention is to overcome the shortcoming that prior art exists, a kind of method of biological decolouring of waste water of pulping is provided.Percent of decolourization of the present invention surpasses 70%, and waste liquid can clean reuse through after the follow-up one-level biochemical treatment.
For achieving the above object, the present invention has taked following technical scheme:
A kind of method of biological decolouring of waste water of pulping comprises following technological step:
1, the screening of whiterot fungi bacterial strain: whiterot fungi obtains for the process isolation and selection substratum of dote from the forest of the torrid zone, subtropics, temperate zone physical environment (aperture＞60 purpose wood powder substratum) screening, and CTMP pulping waste liquor principal pollutant matter lignin and sulfuration lignin molecule are reached 5～40% whiterot fungi bacterial strain at 3～15 days degradation rates; Whiterot fungi is the microorganism of public use.
The characteristic of the enzyme that whiterot fungi produces is: lignin peroxidase field of activity: 100～1500IU/g; Manganese peroxidase field of activity: 100～1500IU/g; Laccase activity scope: 100～1500IU/g.
2, whiterot fungi is tamed adaptability mechanical pulp waste liquid, semi-chemical pulp waste liquid, Alkaline Peroxide Mechanical Pulp waste liquid and sulfonation machine pulp waste: the whiterot fungi that 1 step is screened is that 1: 0.1～10 weight ratio is mixed with fresh weight of mycelium, and as inoculation source, the pulping waste liquor that joins after diluting colourimetric number and be 20～1500 times is tamed; The add-on of waste liquid is 1000,000～1000,000,000 times (L/g) of mycelia weight during domestication, does not add exogenous nutrition, cultivates 1～7 day under pH 2～6,18～45 ℃ of temperature, ventilation and penetrating light condition.
Whiterot fungi has the adaptability to environment, makes the specific pending waste liquid environment of its adaptation of domestication become possibility.Under the lower situation of liquid waste concentration, mycelial growth and multiply vigorous.Along with the raising of liquid waste concentration, the mycelial speed of growth slows down gradually.Through progressively improving the domestication process of concentration, bacterial strain has obtained the adaptability to pulping waste liquor.
(3) whiterot fungi is inoculated into cultivation in the aerobic biochemical reactor, growth and biofilm: the fresh mycelium inoculation of well-grown whiterot fungi is in the biochemical reactor that packed bed is arranged when being chosen in domestication, inoculum size is long-pending 1: 1000 of overall reactor, 000～1000,000,000 (g/L); Whiterot fungi is through the cultivation of 1～5d, absorption on biochemical reactor weighting agent surface, fixing, growth and biofilm.
Packed bed material in the biochemical reactor is cinder, porous ceramics, thick pencil nylon ropes, porous plastics, steel wire, lightweight stone, sheet synthetic glass or granulated glass sphere.Biofilm is the whiterot fungi mycelia of white and the mixture of sporophyte.
Described aerobic biochemical reactor is tandem aerobic biochemical reactor, vertical baffling aerobic biochemical reactor, air lift type aerobic biochemical reactor, gas circulation type biochemical reactor, aeration thermopnore biochemical reactor or filling bed type biochemical reactor.The volume of described aerobic biochemical reactor reaction device is 8-80,000M
3, have temperature and pH value Detection ﹠ Controling device.
4, whiterot fungi decolours to pulping waste liquor: waste liquid is added carry out the biological decolouring reaction in the whiterot fungi biochemical reactor; Temperature of reaction is 25～55 ℃, and the pH value is 2～6.5, and waterpower residence time is 5～24h; Biochemical reaction does not add exogenous nutrition; The waste liquid CODcr value that joins the whiterot fungi biochemical reactor is 300～35000; Colourimetric number is 150～4500 times.
5, after the waste liquid process precipitation process through the whiterot fungi decolouring, enter again handle 5～18h in activated sludge reactor or the sequencing batch type biochemical reactor after, waste liquid reaches national grade one discharge standard, and can reuse, thereby reduced water consumption, met the requirement of national cleaner production.
Compared with the prior art, the present invention has following beneficial effect:
In waterpower 6～24h residence time, whiterot fungi surpasses 70% to the percent of decolourization of pulping waste liquor (colourimetric number is 40～4500 times), waste liquid can clean reuse through after the follow-up one-level biochemical treatment, both at home and abroad up to the present this effect is, it is inaccessiable to adopt flocculence, ultrafiltration process or activated sludge process to handle.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
Paper making raw material: Pinus massoniana Lamb;
Bacterial strain screening: the bacterial strain that obtains reached 27% whiterot fungi at 12 days to the Bjorkman's lignin degradation rate and penetrates arteries and veins side bacterium, was the microorganism of public use;
Pulping process (sulfonation machine slurry CTMP): the processing condition of Chemical Pretreatment and defibrination are as being: NaOH consumption 2.0%, Na
2SO
3Consumption 3.0%, liquor ratio 1: 4,90 ℃ of top temperatures, heating-up time 40min, soaking time 50min, refining concentration 24%, resulting waste liquid colourity is 2613 times.
The whiterot fungi domestication: as inoculation source, adding is 1500 times CTMP pulping waste liquor through dilution back colourimetric number with mycelia; The add-on of waste liquid is 10,000,000 times (L/g) of mycelia weight during domestication.Do not add exogenous nutrition, under pH3.5,37 ℃ of temperature, ventilation and penetrating light condition, cultivated 3 days;
Whiterot fungi biofilm and decolouring: biochemical reactor air lift type packed bed biochemical reactor.Reactor volume 12M
3, 35 ℃ of temperature, pH value are 4.5.The waste liquid CODcr value that joins the whiterot fungi biochemical reactor is 21762; Colourimetric number is 2613 times.Biochemical reaction is not adding exogenous nutrition.
The whiterot fungi decolouring result of table 1. after embodiment 1 described condition is handled
| Waterpower residence time (h) | Waste liquid percent of decolourization (%) | COD clearance (%) |
| 1 3 6 9 12 | 11.2 41.1 75.6 78.9 81.3 | 34.6 46.3 59.5 62.8 68.3 |
Embodiment 2
Paper making raw material: Eucalyptus;
Bacterial strain screening: the bacterial strain that obtains reached 23% whiterot fungi at 9 days to the Bjorkman's lignin degradation rate and penetrates arteries and veins side bacterium I-7-11;
Pulping process (Alkaline Peroxide Mechanical Pulp APMP): the processing condition of Chemical Pretreatment and defibrination are as being: NaOH consumption 3.0%, H
2O
2Consumption 3.0% liquor ratio 1: 4,80 ℃ of top temperatures, heating-up time 45min, soaking time 50min, refining concentration 18%, resulting waste liquid colourity is 2853 times.
The whiterot fungi domestication: as inoculation source, adding is 1700 times APMP pulp waste through dilution back colourimetric number with mycelia; The add-on of waste liquid is 100,000,000 times (L/g) of mycelia weight during domestication.Do not add exogenous nutrition, under pH4.5,40 ℃ of temperature, ventilation and penetrating light condition, cultivated 5 days;
Whiterot fungi biofilm and decolouring: biochemical reactor air lift type packed bed biochemical reactor.Reactor volume 16M
3, 45 ℃ of temperature, pH value are 3.0.The waste liquid CODcr value that joins the whiterot fungi biochemical reactor is 25463; Colourimetric number is 2853 times.Biochemical reaction is not adding exogenous nutrition.
Table 2: the whiterot fungi decolouring result after embodiment 2 described conditions are handled
| Waterpower residence time (h) | Waste liquid percent of decolourization (%) | COD clearance (%) |
| 1 3 6 9 12 | 14.5 57.7 73.8 76.2 79.5 | 25.7 35.1 47.8 61.5 65.3 |
Claims (5)
1, a kind of method of biological decolouring of waste water of pulping is characterized in that comprising following technological step:
(1) screening of whiterot fungi bacterial strain: whiterot fungi obtains for the process isolation and selection substratum of dote from the forest of the torrid zone, subtropics, temperate zone physical environment (aperture＞60 purpose wood powder substratum) screening, and different pulping waste liquor principal pollutant matter lignins and sulfuration lignin molecule are reached 5～40% whiterot fungi bacterial classification at 3～15 days degradation rates;
(2) whiterot fungi is to the domestication of the adaptability of pulping waste liquor: with the whiterot fungi of (1) step with mycelia or spore as inoculation source, the pulping waste liquor that joins after diluting colourimetric number and be 100～1500 times is tamed; The add-on of waste liquid is 1000,000～1000,000,000 times (g/g) of mycelia weight during domestication, does not add exogenous nutrition, cultivates 1～7 day under pH2～6,18～45 ℃ of temperature, ventilation and penetrating light condition;
(3) whiterot fungi is inoculated into cultivation in the aerobic biochemical reactor, growth and biofilm: the fresh mycelium inoculation of well-grown whiterot fungi is in the biochemical reactor that packed bed is arranged when being chosen in domestication, inoculum size is long-pending 1: 1000 of overall reactor, 000～1000,000,000 (g/L); Whiterot fungi is through the cultivation of 1～5d, absorption on biochemical reactor weighting agent surface, fixing, growth and biofilm;
(4) whiterot fungi decolours to waste liquid: waste liquid is added carry out the biological decolouring reaction in the whiterot fungi biochemical reactor; Temperature of reaction is 25～55 ℃, and the pH value is 2～6.5, and waterpower residence time is 5～24h; Biochemical reaction does not add exogenous nutrition; The waste liquid CODcr value that joins the whiterot fungi biochemical reactor is 300～35000; Colourimetric number is 150～4500 times.
(5) after the waste liquid process precipitation process through the whiterot fungi decolouring, enter again in activated sludge reactor or the sequencing batch type biochemical reactor and handle 5～18h.
2, the method for a kind of biological decolouring of waste water of pulping according to claim 1 is characterized in that the described pulping waste liquor of (2) step is mechanical pulp waste liquid, semi-chemical pulp waste liquid, Alkaline Peroxide Mechanical Pulp waste liquid or sulfonation machine pulp waste.
3, the method for a kind of biological decolouring of waste water of pulping according to claim 1 is characterized in that the packed bed material in the described biochemical reactor of (2) step is cinder, porous ceramics, thick pencil nylon ropes, porous plastics, steel wire, lightweight stone, sheet synthetic glass or granulated glass sphere.
4, the method for a kind of biological decolouring of waste water of pulping according to claim 1 is characterized in that the described general aerobic biochemical reactor of (3) step is tandem aerobic biochemical reactor, vertical baffling aerobic biochemical reactor, air lift type aerobic biochemical reactor, gas circulation type biochemical reactor, aeration thermopnore biochemical reactor or filling bed type biochemical reactor.
5, the method for a kind of biological decolouring of waste water of pulping according to claim 4 is characterized in that described aerobic biochemical reactor volume is 8-80,000M
3, have temperature and pH Detection ﹠ Controling device.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259986A (en) * | 2011-07-21 | 2011-11-30 | 绍兴文理学院 | Method for rapidly reducing chromaticity of printing and dying wastewater by utilizing white rot fungi |
| CN105503292A (en) * | 2016-01-21 | 2016-04-20 | 北京健源泽农科技有限公司 | Preparation method of organic plant cultivation substrate |
| CN109652389A (en) * | 2019-02-18 | 2019-04-19 | 福州大学 | Utilize the method for laccase treatment dyeing waste water |
| CN115434178A (en) * | 2022-08-23 | 2022-12-06 | 天津科技大学 | Chemical alkali recovery treatment process for chemi-mechanical pulp waste liquid |
-
2005
- 2005-06-24 CN CN 200510035389 patent/CN1724414A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259986A (en) * | 2011-07-21 | 2011-11-30 | 绍兴文理学院 | Method for rapidly reducing chromaticity of printing and dying wastewater by utilizing white rot fungi |
| CN105503292A (en) * | 2016-01-21 | 2016-04-20 | 北京健源泽农科技有限公司 | Preparation method of organic plant cultivation substrate |
| CN109652389A (en) * | 2019-02-18 | 2019-04-19 | 福州大学 | Utilize the method for laccase treatment dyeing waste water |
| CN115434178A (en) * | 2022-08-23 | 2022-12-06 | 天津科技大学 | Chemical alkali recovery treatment process for chemi-mechanical pulp waste liquid |
| CN115434178B (en) * | 2022-08-23 | 2023-09-01 | 天津科技大学 | Chemical alkali recovery treatment process for chemical mechanical pulp waste liquid |
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