CN1033852A - New technology of disposing pollutant black effluent from small pulp mill - Google Patents
New technology of disposing pollutant black effluent from small pulp mill Download PDFInfo
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- CN1033852A CN1033852A CN 88106448 CN88106448A CN1033852A CN 1033852 A CN1033852 A CN 1033852A CN 88106448 CN88106448 CN 88106448 CN 88106448 A CN88106448 A CN 88106448A CN 1033852 A CN1033852 A CN 1033852A
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- black liquor
- digestive juice
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Abstract
The present invention is the new technology that a kind of anaerobic in low temperature digestion and chemical industry method are also used comprehensive regulation small paper pulp mill black liquor pollution.This technological process and equipment are simple, efficient, low temperature, can advance high concentration black liquor, and advantages such as low amount of consumption of drugs are applicable to the comprehensive regulation of small paper pulp mill waste liquor contamination.
Description
The present invention is a kind of new technology of administering the small paper pulp mill black liquor pollution with the biochemical industry method synthesis, belongs to water quality environment protection field.
China has surplus the enterprises in pulp and paper industry 9000 now approximately, and the factory that produces per year more than ten thousand tons only has about 160, and little factory just accounts for more than 90%.The organic matter amount of pulp and paper industry discharging accounts for 1/4th of national industrial discharge organic substance, and wastewater discharge accounts for 1/10th of national discharged volume of industrial waste water, and the waste liquid of pulp mill is extremely serious to the pollution of water quality.
The waste liquid of pulp mill is mainly formed by the black liquor of cooking section.The black liquor look black, and the foul smelling flavor belongs to the strong basicity high concentrated organic waste liquid, is one of primary pollution source of at present domestic and international water quality.The black liquor of large-scale pulp mill can be handled by alkali reclaiming method, but for numerous little factories, because of the black liquor amount few, siliceous many, material heat energy can't balance, and alkali recovery process is too complicated again, so little factory can't use alkali recycling black liquor, its pollution problem still can not get solving so far.
High concentrated organic wastewater with producing in the Anaerobic Digestion pulping and papermaking processes at home and abroad causes great concern, and is considered to the most important processing method of the nineties.But according to relevant both at home and abroad, the method is handled pulping and paper-making high concentrated organic wastewater-black liquor, has following fatal shortcoming:
(1) starting is slow, efficient is low;
(2) adopt the medium and high temperature fermentation, energy consumption is big;
(3) the reliable perfect technological process of neither one, digestive juice does not reach discharge standard.
The new technology that the purpose of this invention is to provide the comprehensive regulation small paper pulp mill black liquor pollution of a kind of anaerobic in low temperature digestion and chemical industry method and usefulness is for the pollution problem that solves small paper pulp mill provides a kind of effective method.
Content of the present invention and enforcement comprise seven steps of processing of pre-acidifying, batching, anaerobic in low temperature digestion, precipitation, coagulation, chlorination and digestion gas and excessive mud, and existing division is as follows:
1, pre-acidifying
Allow macromolecule organic matter such as polysaccharide ((C such as cellulose and hemicellulose in the black liquor
6H
12O
6)
x) the class material, having under the microbial action of specific function, be degraded to the low molecular compound of Yi Rong in a large number, as acetate (CH
3COOH) etc.The free alkali in the black liquor because easy the to be molten low molecular compound that is degraded into has neutralized so make the pH value of black liquor be dropped rapidly to neutrality, has promptly been created the suitable pH value condition of anaerobic digestion, and for methane fermentation provides abundant matrix, main chemical reactions is again:
Carbohydrate water acetate hydrogen carbon dioxide
2, batching
Organic matter in the pulping back liquor, Main Ingredients and Appearance is cellulose, hemicellulose and lignin, they mainly provide abundant carbon (C) source, yet the energy that consumes in the microbial metabolism is to be produced through the biochemical reaction of a series of complexity from carbon (C), nitrogen (N), phosphorus (P) nutrients by microorganism, study according to biological basis, nutrition ratio in the anaerobic digestion is generally with C: N: P=100: be advisable at 2.5: 0.5, so the black liquor anaerobic digestion must increase N, P nutrition.
This technology provides nutrition with plant wastes.Throw in the Kunming tannery waste and handle the discarded mud in back in dosage bunker, proportioning is about: pre-acidifying black liquor: mud=3: 1(V), or throw in brewery's discarded object vinasse, proportioning is about: pre-acidifying black liquor: vinasse=7: 3(V).Owing to contain amounts of protein and fat in leather-making mud or the vinasse, abundant N, P nutrition are arranged, can satisfy the requirement of this technology.
3, anaerobic in low temperature digestion
Deployed material is dropped into the airtight activated sludge anaeroic digestor of (mixing the reorganization flora) that has, materials: the amount of activated sludge=1: 1 starts, and is about at low temperature (natural temperature) and PH under 8 the condition to carry out anaerobic digestion.When treating that digestion gas can be lighted, reaction is reloaded at every turn and can be gone out laggardly earlier, and the input and output material amount is controlled at 10%(V) about be advisable.The main chemical reactions formula is:
4, precipitation
Digestive juice is discharged, and send subordinate to handle through post precipitation.
5, coagulation
With the digestive juice of post precipitation and the iron chloride (FeCl of pulp mill's bleachery chlorine-contained wastewater and waste iron filing reaction generation
3) solution fully mixes, and add milk of lime simultaneously (Ca(OH)
2), when pH value reaches 11.5 left and right sides, iron hydroxide (Fe(oH) is arranged
3) generate the iron hydroxide adsorpting pigment precipitation of colloid.
6, chlorination
Digestive juice by coagulating treatment is transferred to filbert by pitchy, but also remaining some organic matters in the digestive juice, harmful inorganic matter, pigment and smell also have certain distance apart from emission request.Add liquid chlorine in digestive juice, chlorine and water reaction generate hypochlorous acid (HOCl), and are dissociated into H thereupon
++ OCl
-Hypochlorous acid is strong oxidizer, OCl
-+ H
+Immediately with digestive juice in residual organic matter, harmful inorganic matter produces a series of redox reaction, reaches the purpose except that crude removal.The digestive juice of eccysis dirt is through post precipitation, and adding dilution a little can discharge.The main chemical reactions formula is:
7, the processing of digestion gas and excessive mud
Digestion gas is drawn continuously, removes H through washing
2Can after dehydrating, excessive digested sludge can do farming, the use of woods fertilizer for burning usefulness behind the S.
The present invention compares with prior art, existing achievement in research, mainly possesses following advantage:
1, this technological process and equipment are simple.Equipment is general chemical industry common equipment, and most equipment and materials can be used concrete for making, and small investment is safeguarded cheaply, is suitable for the improvement of small paper pulp mill black liquor pollution.
2, efficient.The bacterial activity height that this technology is used, it is effective to handle pre-acidified black liquor.This technology is all high to the degree of purification and the energy recovery rate of black liquor.
3, realize anaerobic in low temperature digestion.This technology is tamed out the low-temperature biological flora by adjusting other ambient parameter cultivation, has simplified heating operation and equipment.
4, can the high concentration charging.This law can directly be thrown in (6～12) * 10
4The concentrated black liquid of mg CODr/L.
5, low medicine consumption, whole technology are thrown in a small amount of liquid chlorine during except that chlorination, and other all adopts pending trade waste to replace chemical reagent to use, and has the effect of the treatment of wastes with processes of wastes against one another comprehensive regulation.
6, digestion gas (biogas) gas production height, quality is good.
7, the basic principle of using this law can further be turned out more efficient cryogenic anaerobic digestion flora, open up a wide new approach for other small-sized paper pulp factory and office reason black liquor pollution, also can further explore the new method of handling general industry organic wastewater.
Embodiment:
Example 1:
Waste liquid: Yun Feng paper mill alkaline straw-pulp black liquid.
Yun Feng paper plant alkaline straw-pulp black liquid pollution condition
| Project | Country allows discharge value | Rich paper plant black liquor is removed in Kunming |
| PH value | ±7 | 13 |
| COD cr | 300(mg/L) | (6-12)×10 4(mg/L) |
| BOD 5 | 60(mg/L) | (3～4)×10 4(mg/L) |
Main processes: the processing of prewiredization, batching, anaerobic in low temperature digestion, precipitation, coagulation, chlorination and digestion gas and excessive mud.
Batching: Yun Feng paper mill alkaline straw-pulp black liquid, input 1/3(V) leather-making mud, (kraft cooking bagasse and imperial cogongrass, slag: grass=the gained black liquor was used after pre-acidifying in 2: 1).
Equipment: the anaerobic digestion device of dressing up with thin mouthful of vial of 3L.
Condition: PH=7～8; Natural temperature; 14 days demurrages; The semicontinuous operation mode.
Effect: COD in the digestive juice
CrThe rate of removing can reach 89%; Methane content can reach 78% in the digestion gas; Factor of created gase 3.3(L gas/L black liquor d), see following table for details:
Yun Feng paper plant alkaline straw-pulp black liquid anaerobic in low temperature digestion situation
COD
CrResult of the test
Yun Feng paper plant alkaline straw-pulp black liquid anaerobic in low temperature digestion situation
The biogas production situation
Example 2:
Waste liquid: Yun Feng paper mill alkaline straw-pulp black liquid.
Main processes (the same)
Batching: with after the Yun Feng paper mill alkaline straw-pulp black liquid acidifying with the alcohol mix,
Mixing ratio is: black liquor: vinasse=7～8: 3～2.
Equipment: use the 10L anaerobic digestion device.
Condition: PH=7～8; Natural temperature; 8 days demurrages, the semicontinuous operation mode.
Effect: digestive juice COD
CrClearance 70%, methane content is nearly 69% in the digestion gas, factor of created gase reaches 3.37(L gas/black liquor d), see following table for details:
Claims (4)
1, a kind of new technology of disposing pollutant black effluent from small pulp mill is characterized in that adopting following steps:
1.1, allow macromolecule organic matter in the black liquor of storing under action of microorganisms, be degraded to the low molecular compound of Yi Rong in a large number, as acetate (CH
3COOH) etc.,
1.2, drop into waste sludge or abandoned vinasse in the black liquor after pre-acid, increase necessary N, the P nutrition of anaerobic digestion,
1.3, deployed material is dropped into the airtight activated sludge digester of (mixing the reorganization flora) that has, under low temperature (natural temperature) and PH=7～8 conditions, carry out anaerobic digestion,
1.4, digestive juice discharges through post precipitation and send subordinate to handle,
1.5, with the digestive juice and the iron chloride (FeCl of post precipitation
3) solution fully mixes, and [the Ca (OH) that adds milk of lime simultaneously
2], reaching up to pH value had the iron hydroxide of colloid adsorpting pigment precipitation at 11.5 o'clock,
1.6, add liquid chlorine in the digestive juice after Coagulation with Treatment, remove residual organic and harmful substance in the digestive juice,
1.7, the digestive juice after the chlorination through precipitation a little dilution can discharge,
1.8, batching and the postdigestive gas of anaerobic in low temperature removes H by washing
2Biogas behind the S can be used as the energy,
1.9, the mud that produces of anaerobic in low temperature digestion and precipitation can make farming, woods fertilizer after through dehydration, drying.
2, as the described processing method of claim 1.2, it is characterized in that:
Pre-acidifying black liquor: mud=3: 1(V)
Pre-acidifying black liquor: vinasse=7: 3(V)
3, as claim 1,3 described processing methods, it is characterized in that: materials activated sludge=1: 1(V) amount starts, and treats that digestion gas can light, and operation enters normally reloads to go out earlier laggard at every turn, and the input and output material amount is controlled at 10%(V) about.
4,, it is characterized in that used iron chloride (FeCl as the described processing method of claim 1.5
3) solution is that the reaction of pulp mill's bleachery chlorine-contained wastewater and waste iron filing generates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88106448 CN1033852A (en) | 1988-08-29 | 1988-08-29 | New technology of disposing pollutant black effluent from small pulp mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88106448 CN1033852A (en) | 1988-08-29 | 1988-08-29 | New technology of disposing pollutant black effluent from small pulp mill |
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| Publication Number | Publication Date |
|---|---|
| CN1033852A true CN1033852A (en) | 1989-07-12 |
Family
ID=4834252
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88106448 Pending CN1033852A (en) | 1988-08-29 | 1988-08-29 | New technology of disposing pollutant black effluent from small pulp mill |
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| Country | Link |
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| CN (1) | CN1033852A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796577A (en) * | 2011-11-16 | 2012-11-28 | 山东省农业科学院农业资源与环境研究所 | Method for producing methane by utilizing papermaking black liquid caused by ammonium sulfite method |
| CN103757965A (en) * | 2014-01-15 | 2014-04-30 | 新疆国力源投资有限公司 | Biological alkali recovery process for papermaking black liquor |
| CN104478164A (en) * | 2014-12-10 | 2015-04-01 | 中国宣纸股份有限公司 | Treatment system for secondary black liquor |
| CN108017149A (en) * | 2017-12-14 | 2018-05-11 | 山鹰国际控股股份公司 | A kind of application of multiphase synergy nitrogen in sewage disposal |
| CN109205940A (en) * | 2018-09-30 | 2019-01-15 | 广西大学 | A kind of processing of alkalinity defibrination waste water and circulation utilization method |
| CN111542661A (en) * | 2017-12-29 | 2020-08-14 | 维美德技术有限公司 | Method and system for adjusting S/Na balance of pulp mill |
-
1988
- 1988-08-29 CN CN 88106448 patent/CN1033852A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796577A (en) * | 2011-11-16 | 2012-11-28 | 山东省农业科学院农业资源与环境研究所 | Method for producing methane by utilizing papermaking black liquid caused by ammonium sulfite method |
| CN102796577B (en) * | 2011-11-16 | 2014-01-08 | 山东省农业科学院农业资源与环境研究所 | Method for producing methane by utilizing papermaking black liquid caused by ammonium sulfite method |
| CN103757965A (en) * | 2014-01-15 | 2014-04-30 | 新疆国力源投资有限公司 | Biological alkali recovery process for papermaking black liquor |
| CN104478164A (en) * | 2014-12-10 | 2015-04-01 | 中国宣纸股份有限公司 | Treatment system for secondary black liquor |
| CN104478164B (en) * | 2014-12-10 | 2017-01-18 | 中国宣纸股份有限公司 | Treatment system for secondary black liquor |
| CN108017149A (en) * | 2017-12-14 | 2018-05-11 | 山鹰国际控股股份公司 | A kind of application of multiphase synergy nitrogen in sewage disposal |
| CN111542661A (en) * | 2017-12-29 | 2020-08-14 | 维美德技术有限公司 | Method and system for adjusting S/Na balance of pulp mill |
| CN111542661B (en) * | 2017-12-29 | 2023-07-18 | 维美德技术有限公司 | Method and system for adjusting S/Na balance of pulp mill |
| CN109205940A (en) * | 2018-09-30 | 2019-01-15 | 广西大学 | A kind of processing of alkalinity defibrination waste water and circulation utilization method |
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