CN101781006A - New method for improving flocculation treatment effect of high yield pulp waste liquid by using surplus sludge - Google Patents
New method for improving flocculation treatment effect of high yield pulp waste liquid by using surplus sludge Download PDFInfo
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- CN101781006A CN101781006A CN 201010116607 CN201010116607A CN101781006A CN 101781006 A CN101781006 A CN 101781006A CN 201010116607 CN201010116607 CN 201010116607 CN 201010116607 A CN201010116607 A CN 201010116607A CN 101781006 A CN101781006 A CN 101781006A
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Abstract
The invention provides a new method for improving flocculation treatment effect of high yield pulp waste liquid, which is suitable for the high yield pulp produced synthetic wastewater, wherein the high yield pulp results from poplar wood, eucalyptus and all kinds of fast growing wood raw materials by adopting pulping processes of APMP, PRC-APMP, and BCTMP, etc. The method comprises the following steps: adding biological treatment surplus sludge into the high yield pulp waste liquid with the addition of 0.1-0.5%; leading the sludge and the waste liquid to contact and react for some time; and flocculating the waste liquid. For the high yield pulp waste liquid, in particular to the waste liquid of the APMP and the BCTMP, the flocculation treatment has good effect by using aluminum potassium sulfate and cationic polyacrylamide. By using the process to process the high yield pulp waste liquid, the removal rate of COD can reach 78-92.5%, and the removal rate of SS can reach 92-96.7%, and the removal rate of COD is improved by 10-22% compared with the removal rate of COD in the method which performs the flocculation treatment using no activated sludge.
Description
Technical field:
The invention belongs to the Industrial Wastewater Treatment field, relate in particular to the flocculation pre-treatment workshop section of high-yield pulping waste liquid.
Background technology:
High yield cooking is one of resource-effective practice of China's pulp and paper industry.In recent years, the high yield cooking particularly development and use of technology such as APMP, PRC-APMP, BCTMP has improved the utilization ratio of fibrous material, has directly reduced the consumption of fibrous material, has become one of the fastest slurry kind of development in recent years.
Although the contamination level that produces in the high yield cooking processes such as APMP, PRC-APMP, BCTMP greatly reduces than general chemistry pulping process, but different with chemical pulp factory is, high yield pulp factory does not generally have pharmaceutical chemicals to recycle facility, in slurrying and the bleaching process from timber the material of stripping all enter in the waste water.With the living leaf wood of speed is that raw material production APMP slurry is an example, and its wastewater discharge is generally 20-30m
3/ t slurry, BOD
5Be respectively 20-100kg/t slurry and 60-250kg/t slurry with COD, and with a large amount of suspended substances, solvability colloidalmaterial and darker color, the COD of high yield pulp factory waste water
CrCan reach 5000-20000mg/L, BOD
5Be the 30%-45% of COD then, and contain multiple toxic organic compound and comprise the RFA big (resin andfatty acids) material, therefore, must take other measure that it is effectively administered hydrobiont toxicity.
At present, both at home and abroad two kinds of approach of the general employing of processing of such waste water are handled, the one, adopt the biological treatment mode, the 2nd, adopt the minimizing technology that waste liquid is handled.Wherein biological method especially activated sludge process use at most, the minimizing technology also is in experiment and research and development stage mostly except that the minority application example.
Apply to the biochemical processing process in the production, because the composition more complicated (organism mainly comprises lignin degradation product, resinous acid, lipid acid, phenols, alkanes and phthalate etc.) of high yield pulp waste liquid and contain large number of biological toxicant RFA, adopt " pre-treatment+biological treatment of (flocculation) precipitation " or (flocculation) precipitate the pattern of pre-treatment+biological treatment+advanced treatment more.Because high yield cooking is different from the chemical pulping technology, the pulping process is mainly still finished by mechanical forces, therefore SS class substances content is higher in the waste liquid, therefore before biological treatment, be the stabilizing treatment system, minimizing is to the influence of biological treatment system mud, and many isolation technique that adopt are earlier removed a large amount of SS material in the waste water.Particularly the treatment process of anaerobism+aerobic pattern is adopted in biological treatment, helps the maintenance of anaerobic sludge.The most frequently used separation method is that precipitation and air supporting mode are removed suspended substance in the waste water.Be to improve separating effect, the most common means that flocculation treatment is in the sepn process to be adopted.The employing flocculation sedimentation on average can be removed the suspended matter more than 80%, adopts the isolating flocculation treatment of dissolved air flotation, and the TSS clearance can reach 65%～95%.
Flocculation treatment has good effect of removing for SS class material in the waste liquid and part colloidalmaterial, is very limited to solvability with than the colloidalmaterial removal effect of small molecular weight.But consider from water treatment system itself, more pollutent is removed by flocculation treatment, can alleviate the load and the operating pressure of biological treatment greatly, and can reduce the content of bio-toxicity material to a certain extent.For improving flocculation treatment effect, add sorbent material in waste liquid, rely on the characterization of adsorption of sorbent material to pollutent, the absorption that sorbent material and pollutent are removed in the lump helps that to coagulate research many then, effect is also very remarkable, is a fine approach that improves flocculation treatment effect.Domestic scholars adopts absorption coagulant aidss such as atlapulgite, flyash, superfine talcum powder that the dense wastewater of starch factory of height, paper waste etc. are adsorbed to help to coagulate and handles, and has all obtained good effect of flocculant.Biological sludge is having a lot of application as a kind of high-efficiency adsorbent aspect each heavy metal species absorption removal.Wastewater treatment help coagulate aspect, numerous application are also arranged, especially aspect sanitary sewage disposal.
Biological activity mud is added in the high yield pulp pulping waste liquor, utilize the biological sludge adsorption, improve flocculation treatment effect, the economy and the stability of whole pulping waste liquor treatment system is all had very big benefit.Biological sludge is added in the pulping waste liquor pretreatment system simultaneously, though can increase total mud generation, but because the good dewatering that biological sludge has, also help to improve the dehydrating effect of pre-treatment mud, therefore the subsequent disposal that helps mud is very beneficial to reducing the sludge dewatering treatment cost.
In the high-yield pulping waste liquid with the residual active sludge adding, improve the waste liquid flocculation treatment effect and do not see that other people report.
Summary of the invention
The invention provides a kind of a kind of novel method that improves high yield pulp pulping waste liquor flocculation pretreating effect, be applicable to the comprehensive wastewater that poplar, Eucalyptus and various fast growing wood raw material adopt pulping process high yield pulps such as APMP, PRC-APMP, BCTMP to produce.
The excess sludge of will carrying out a biological disposal upon directly adds in the high yield pulp pulping waste liquor, add-on is 0.1-0.5%, mud preferably makes mud and waste liquid that one section reaction contact time is arranged after adding, so that make active sludge can with pollutent generation absorption reaction in the waste liquid, mud and waste liquid contact reacts time 10-60 minute, mud adds in the waste liquid, the pH value of waste liquid preferably is controlled at 7.2-9.5, the general APMP that adopts, high yield cooking technologies such as BCTMP produce the waste liquor PH value substantially in this scope, so most technologies need not be regulated the pH value when using, to with the waste liquor PH value enterprise in this scope not, suggestion is suitably regulated the waste liquor PH value, and waste liquid temperature is controlled at 20 ℃-45 ℃.In mud and waste liquid contact reacts process, preferably be furnished with agitation as appropriate, contact so that waste liquid has fully with mud, and help the transmission of pollutent, stirring intensity is so that mud is in suspended state is advisable.
Residue biological sludge and waste liquid are after reaction for some time, again waste liquid is carried out flocculation treatment, for high yield pulp waste liquid, APMP particularly, BCTMP waste liquid flocculation treatment effect, flocculation treatment employing potassium aluminium sulfate and cationic polyacrylamide effect are better, at first add potassium aluminium sulfate, add-on is at 50-350mg/l, add cationic polyacrylamide then, both interval 5-25 seconds joining days or pipeline location are at a distance of 5-30m, make potassium aluminium sulfate and waste liquid and active sludge that a reaction times be arranged, so that flco can better form, cationic polyacrylamide consumption 2-50mg/l, adopt this technology that high-yield pulping waste liquid is handled, the COD clearance can reach 78-92.5%, and the SS clearance can reach 92-96.7%, can improve 10%-22% than directly carrying out flocculation treatment COD clearance without active sludge.
Embodiment 1 cotton stalk high yield pulp waste liquor is handled
Waste water original index: COD
Cr: 10650mg/l, SS:2500mg/l, pH:8.7
Mud add-on 0.2%, mud contact reacts time 30min, pH value 8.7,35 ℃ of temperature, mixing speed 150rpm, potassium aluminium sulfate consumption 150mg/l, PAM consumption 10mg/l.
Handle back COD
Cr: 1860mg/l, SS:82.5mg/l, pH:8.25
The COD clearance: 82.5%, SS clearance: 96.7%.
Do not help with fixed attention than not adding mud that the COD clearance has improved 18 percentage points.
Embodiment 2 Eucalyptus APMP pulping waste liquor dispositions
Waste water original index: COD
Cr: 7360mg/l, SS:2150mg/l, BOD5:2260mg/l, pH:8.41 mud add-on 0.25%, mud contact reacts time 15min,, pH value 8.41,30 ℃ of temperature, mixing speed 150rpm, potassium aluminium sulfate consumption 100mg/l, PAM consumption 10mg/l.
Handle back COD
Cr: 1540mg/l, SS:95mg/l, the pH:8.21COD clearance: 79.1%, SS clearance: 95.6%.
10 percentage points have not been improved than not adding active sludge.
Claims (7)
1. novel method of utilizing excess sludge to improve flocculation treatment effect of high yield pulp waste liquid, it is characterized in that the residual active sludge that will produce in the pulping waste liquor bioprocess adds in the flocculation preprocessing process, utilize active sludge the special flocculation treatment effect that improves of pollutent absorption.
2. according to the method for the described raising flocculation treatment effect of claim 1, be applicable to that various fast growing wood raw materials adopt high yield cooking technologies such as APMP, PRC-APMP, BCTMP to give birth to the flocculation treatment of the comprehensive wastewater of slurrying generation, are particularly useful for adopting the common technical process of flocculation pre-treatment+biological treatment.
3. according to the method for the described raising flocculation treatment effect of claim 1, it is characterized in that the residual active sludge that will produce in the pulping waste liquor biological treatment process adds in the flocculation preprocessing process, utilize the adsorption of active sludge to pollutent in the waste liquid, improve the effect of flocculation treatment, then waste liquid is carried out flocculation treatment.
4. according to the method for the described raising flocculation treatment effect of claim 3, the remaining activity of at first will carrying out a biological disposal upon adds in the high-yield pulping waste liquid, add-on is 0.1-0.5%, mud and waste liquid contact reacts time 10-60min, pH value 7.2-9.5, wastewater temperature 20-45 ℃, the mixing and contacting reaction process is preferably with stirring, and stirring intensity does not sink to the bottom with mud and is advisable.
5. according to the described treatment process of claim 3, after the biological sludge contact reacts finishes, waste water is carried out flocculation treatment, flocculation treatment adopts potassium aluminium sulfate and cationic polyacrylamide to handle, and addition sequence is before the potassium aluminium sulfate, behind the cationic polyacrylamide, and both interval 5-25 seconds joining days or pipeline location are at a distance of 5-30m, potassium aluminium sulfate consumption 50-350mg/l, cationic polyacrylamide consumption 2-50mg/l, CODcr clearance are at 45%-82%, and the SS clearance is at 55%-85%.
6. according to claim 4, the described treatment process of claim 5, high-yield pulping waste liquid helps to coagulate through active sludge and handles, the COD clearance can reach 78-92.5%, and the SS clearance can reach 92-96.7%, handles the COD clearance with fixed attention and can improve 10%-22% than helping without mud.
7. originally helping with fixed attention, method also has certain effect of flocculant for other organic wastewater with high concentration.
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| CN 201010116607 CN101781006A (en) | 2010-03-03 | 2010-03-03 | New method for improving flocculation treatment effect of high yield pulp waste liquid by using surplus sludge |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765849A (en) * | 2011-05-05 | 2012-11-07 | 天津广聚源纸业有限公司 | Deep treatment method of papermaking wastewater |
| CN102816007A (en) * | 2012-09-10 | 2012-12-12 | 谢明文 | Method for preparing trace-element fertilizer |
| CN102963967A (en) * | 2012-09-02 | 2013-03-13 | 栾川县秦豫科技有限公司 | Molybdenum dressing tailing slurry treatment agent and preparation method thereof |
| CN106186292A (en) * | 2016-08-08 | 2016-12-07 | 孟祥娣 | A kind of method of active sludge treatment waste water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996009435A1 (en) * | 1994-09-21 | 1996-03-28 | Kimberly-Clark Worldwide, Inc. | Wet-resilient webs |
| CN1379152A (en) * | 2001-11-13 | 2002-11-13 | 徐守才 | Process for reclaiming waste digestion liquid of alkaline (or neutral) straw pulp generated by sodium sulfite method |
| CN101269885A (en) * | 2008-05-09 | 2008-09-24 | 天津科技大学 | Processing method for biotransformation of cotton stalk high yield pulp waste liquor with bacterial N4 |
-
2010
- 2010-03-03 CN CN 201010116607 patent/CN101781006A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996009435A1 (en) * | 1994-09-21 | 1996-03-28 | Kimberly-Clark Worldwide, Inc. | Wet-resilient webs |
| CN1379152A (en) * | 2001-11-13 | 2002-11-13 | 徐守才 | Process for reclaiming waste digestion liquid of alkaline (or neutral) straw pulp generated by sodium sulfite method |
| CN101269885A (en) * | 2008-05-09 | 2008-09-24 | 天津科技大学 | Processing method for biotransformation of cotton stalk high yield pulp waste liquor with bacterial N4 |
Non-Patent Citations (1)
| Title |
|---|
| 《中国造纸》 20081231 刘廷志等 用活性污泥吸附助凝处理棉秆半化学浆废液 第27～30页 1-6 第27卷, 第10期 2 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102765849A (en) * | 2011-05-05 | 2012-11-07 | 天津广聚源纸业有限公司 | Deep treatment method of papermaking wastewater |
| CN102963967A (en) * | 2012-09-02 | 2013-03-13 | 栾川县秦豫科技有限公司 | Molybdenum dressing tailing slurry treatment agent and preparation method thereof |
| CN102816007A (en) * | 2012-09-10 | 2012-12-12 | 谢明文 | Method for preparing trace-element fertilizer |
| CN102816007B (en) * | 2012-09-10 | 2013-10-23 | 谢明文 | Method for preparing trace-element fertilizer |
| CN106186292A (en) * | 2016-08-08 | 2016-12-07 | 孟祥娣 | A kind of method of active sludge treatment waste water |
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Open date: 20100721 |