CN102616998B - Device for treating wastewater produced in production process of alkaline peroxide mechanical pulp (APMP) - Google Patents
Device for treating wastewater produced in production process of alkaline peroxide mechanical pulp (APMP) Download PDFInfo
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- CN102616998B CN102616998B CN201210100699XA CN201210100699A CN102616998B CN 102616998 B CN102616998 B CN 102616998B CN 201210100699X A CN201210100699X A CN 201210100699XA CN 201210100699 A CN201210100699 A CN 201210100699A CN 102616998 B CN102616998 B CN 102616998B
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Abstract
The invention discloses a device for treating wastewater produced in the production process of alkaline peroxide mechanical pulp (APMP). The device consists of a grid trench, an adjustment primary settlement tank, a shallow layer air floatation device, a middle water tank, a cooling tower, an upflow anaerobic sludge blanket (UASB), a hydrolysis and acidification tank, a middle settlement tank, a cyclic activated sludge system (CASS) biochemical tank, a secondary settlement tank and an advanced oxidation tank which are sequentially connected; the secondary settlement tank is connected with a sludge concentration tank; the sludge concentration tank is connected with a belt dehydrator; the CASS biochemical tank comprises an organism selection area adopting an anaerobic environment, a facultative area which has the effect of buffering water quality, and a main reaction area for degrading organic matter; the main reaction area is provided with an oxygen supply system which ensures long sludge age and low sludge load; and an ozone composition is arranged in the advanced oxidation tank to reduce chemical oxygen demand (COD). The UASB, hydrolysis and acidification, CASS and advanced oxidation process combined device is adopted, so that wastewater produced in the production process of APMP can be effectively treated, and the index of effluent reaches the requirement of GB3544-2008.
Description
Technical field
The present invention relates to the Industrial Wastewater Treatment field, relate in particular to a kind for the treatment of unit of APMP pulp-making waste-water.
Background technology
APMP (alkaline peroxide mechanical pulp) slurrying principle is with the high compression ratio spiral raw material to be carried out extrusion process before defibrination, strengthening soup soaks into, add pharmaceutical chemicalss such as hydrogen peroxide and sodium hydroxide then and carry out bleaching action, thereby saved a series of equipment of behind defibrination, bleaching again.The characteristics of APMP method are that slurrying and bleaching combination are carried out, Production Flow Chart is simple, production cost is low, the pulp yield height, intensity is good, whiteness is high, improved the utilization ratio of fibrous material, directly reduce the consumption of fibrous material, developed rapidly in recent years, become the main method of high yield cooking in the world.
The processes such as washing concentrating that are mainly derived from wood chip decatize, screw extrusion, chemical impregnation and slurry of alkaline hydrogen peroxide mechanical pulping waste water, the waste water principal feature is that the pulping water consumption is low, sewage quantity is few, the water temperature height, SS content height, COD concentration height, suspended substance and colloidal content height, good biodegradability.Waste water mainly consists of wood chip in small, broken bits, soup leachable, fiber fines, stripping xylogen etc.
The method of the Processing Paper Wastewater that adopts usually is physico-chemical process, membrane filter method and biochemical process at present.
It is often very difficult up to standard that physico-chemical process is handled the water outlet that obtains, and can not directly discharge.The film of membrane filter method is easily stopped up by the suspended substance in the waste water, and membrane lifetime reduces, and cost raises.Biochemical process is to adopt active sludge treatment process, and present technology shortcoming is for occurring sludge bulking easily, and treatment effect is relatively poor.
Summary of the invention
The invention provides a kind for the treatment of unit of APMP pulp-making waste-water, with solve existing APMP pulp-making waste-water handle have that filtering membrane stops up easily, cost height, sludge bulking cause deficiencies such as treatment effect is relatively poor.
The present invention adopts following technical scheme:
A kind for the treatment of unit of APMP pulp-making waste-water, by the grid canal that connects in turn, regulate preliminary sedimentation tank, the shallow air-floatation device, intermediate pool, cooling tower, the UASB Sludge Bed, hydrolysis acidification pool, medium sediment pool, the CASS biochemistry pool, second pond and deep oxidation pond are formed, described second pond is connected with sludge thickener, sludge thickener inserts a belt water extracter, described CASS biochemistry pool comprises the biological selecting area that adopts anaerobic environment, the main reaction region that water quality is had aerobic area and the degradation of organic substances of shock absorption, main reaction region is provided with one makes mud long age, the oxygen system that sludge loading is low, the built-in combined with ozone thing in described deep oxidation pond is to reduce COD, the preferred O of combined with ozone thing
3/ UV/TiO
2
Above-mentioned shallow air-floatation device, medium sediment pool and deep oxidation pond all are added with coagulating agent, described coagulating agent preferred polymeric aluminum chloride is made coagulating agent and is done coagulant aids with the epistasis cationic-type polyacrylamide, the solid substance of shallow air-floatation device is mainly based on fiber, recyclable utilization.
Above-mentioned medium sediment pool, second pond part mud are back to hydrolysis acidification pool, CASS biochemistry pool respectively, other has part mud to deliver to sludge thickener with the mud in UASB Sludge Bed, hydrolysis acidification pool, deep oxidation pond to precipitate and concentrate the back by the dehydration of belt water extracter, and mud is transported outward again.
Further, be provided with dissolved oxygen on-line determination instrument in the described biological selecting area, its output signal inserts the PLC substation, and the station of this PLC is carried out online adjusting according to dissolved oxygen value size and variation to sludge back flow quantity, to reach the release that best anaerobic environment is beneficial to phosphorus.
Further, elastic filler is installed in the described hydrolysis acidification pool is fixed in filling surface with a large amount of microorganisms of cultivating in the domestication water with the microbial film form, effective residence time of described hydrolysis acidification pool is 5.84h.
Again further, be 15.7d design mud age of described main reaction region, described oxygen system preferred microporous blast aeration device.
By the above-mentioned description of this invention as can be known, the invention has the advantages that:
One, the present invention adopts the process combination device of " UASB+ acidication+CASS+ deep oxidation ", can handle the waste water that APMP slurrying produces effectively, and effluent index reaches the requirement of GB3544-2008.
Two, cooling tower is located at the back of shallow air-floatation device, arrives cooling tower again after utilizing the shallow air-floatation device to lower the temperature naturally, has reduced the load of cooling tower, has saved the energy.
Three, hydrolysis acidification pool makes acidization rest on hydrolysis and souring stage by the control residence time and reaction conditions, avoids because of overstand, produces H
2Unpleasant odors such as S, indoles, biogas.
Four, the CASS pond is played shock absorption preferably at biological selecting area and aerobic area to influent quality, the water yield, pH and hazardous and noxious substances, effectively prevent sludge bulking, select rational air demand and micropore extended aeration mode for use in main reaction region, make main reaction region have synchronous nitration and denitrification function.
Description of drawings
Fig. 1 is block diagram of the present invention;
Fig. 2 is the block diagram of CASS biochemistry pool of the present invention.
Embodiment
The specific embodiment of the present invention is described with reference to the accompanying drawings.
With reference to Fig. 1, a kind for the treatment of unit of APMP pulp-making waste-water is made up of the grid canal 1 that connects in turn, adjusting preliminary sedimentation tank 2, shallow air-floatation device 3, intermediate pool 4, cooling tower 5, UASB Sludge Bed 6, hydrolysis acidification pool 7, medium sediment pool 8, CASS biochemistry pool 9, second pond 10 and deep oxidation pond 11, described second pond 8 is connected with sludge thickener 12, and sludge thickener 12 inserts belt water extracter 13.
Change machine pulp waste water flows automatically into frame trough 1 through the sewage pipe duct, after grid sewage-removing machine is removed fiber and a large amount of suspended substance, enter adjusting preliminary sedimentation tank 2 and carry out the adjusting of the water yield and water quality, rising to shallow air-floatation device 3 through pump adds coagulating agent and carries out fiber recovery, water outlet enters intermediate pool 4, and rise to cooling tower 5 through pump wastewater temperature is dropped to 30 ℃ ~ 40 ℃, entering UASB Sludge Bed 6 again handles, waste water is at the residence time of UASB Sludge Bed 6 control 25.59h, the collecting methane that produces is as its usefulness, and mud is delivered to sludge thickener 12.The active sludge that the pulp-making waste-water that UASB Sludge Bed 6 is handled and part medium sediment pool reflux enters hydrolysis acidification pool 7 synchronously, larger molecular organicses such as the fat under the condition of oxygen of holding concurrently in the hydrolysis sewage, protein are small organic molecule, simultaneously by ammonifying bacteria in the water effect the organonitrogen in the sewage is converted into and can be utilized the NH that decomposes by nitrifier
4 +Mud regularly pumps into sludge thickener 12 by sludge pump, hydrolysis acidification pool 7 effective residence time controls are at 5.84h, hydrolysis acidification pool 7 water outlets are from flowing into medium sediment pool 8, add the coagulating agent coagulation, remove suspended substance, colourity in the waste water, medium sediment pool 8 hydraulic detention times are controlled at 1.17h, and medium sediment pool 8 water outlets enter CASS biochemistry pool 9.
With reference to Fig. 2, CASS biochemistry pool 9 is divided into biological selecting area 91, aerobic area 92 and main reaction region 93, biological selecting area 91 adopts anaerobic environment, when the mud quantity of reflux is preferred maximum 20% for the treatment of capacity, biological selecting area 91 bottoms arrange submersible agitator 911 to have and mixes agitating function preferably, returned sluge and sewage are fully mixed, because anaerobic environment is bigger to the release influence of phosphorus, in biological selecting area 91, also be provided with dissolved oxygen on-line determination instrument 912, its output signal inserts PLC substation 913, PLC substation 913 is carried out online adjusting according to size and the variation of dissolved oxygen value to sludge back flow quantity, to reach the release that best anaerobic environment is beneficial to phosphorus; Aerobic area 92 not only has the biological selecting area that moves under auxiliary anaerobism or the double oxygen condition to the shock absorption that the influent quality water yield changes, and also has the further release and the intensified anti-nitrated effect that promote phosphorus simultaneously; Main reaction region 93 has adopted the extended aeration mode that mud age is long, sludge loading is lower, so the mud mud production rate is lower, design mud age is 15.7 days, and the method for calculation of the aeration oxygen requirement of preferred main reaction region 93 adopt: remove BOD
5Oxygen (the 0.5kgO that consumes
2/ kgBOD), keep the needed oxygen (0.11kgO of sludge aerobic in the aeration tank
2/ kg mud), the needed oxygen (4.7kgO of ammonia nitrogen nitre fat
2/ kgNH
3-N), preferred oxygen system adopts micropore air-blast device 931.Biological selecting area 91 and aerobic area 92 pairs of influent qualities, the water yield, pH and hazardous and noxious substances play shock absorption preferably, can effectively prevent sludge bulking; Main reaction region 93 is finished the degraded to organic substance in the sewage, and 9 residence time of CASS biochemistry pool are controlled at 10.81h.
Continuation is with reference to Fig. 1,9 water outlets of CASS biochemistry pool enter second pond 10,9 water outlets precipitate to the CASS biochemistry pool, remove suspended substance, colourity in the sewage, dirty 10 mud of second pond are delivered to sludge thickener 12, second pond 10 control hydraulic detention time 3.04h, second pond 10 water outlets enter deep oxidation pond 11, add coagulating agent and remove suspended substance, combination ozone method, the preferred O of combination ozone method are adopted in deep oxidation pond 11
3/ UV/TiO
211 handle to remove the organic macromolecule of bio-refractories and chroma pollution thing and reduce COD through the deep oxidation pond, chroma in waste water is significantly descended until colourless, deep oxidation pond 11 control residence time 2.58h, the 11 effluent quality indexs of handling reach the requirement of GB3544-2008 through the deep oxidation pond.The mud in UASB Sludge Bed 6, hydrolysis acidification pool 7, medium sediment pool 8, CASS biochemistry pool 9, second pond 10 and deep oxidation pond 11 is delivered to sludge thickener 12 together and is precipitated and concentrate the back and deliver to 12 dehydrations of belt water extracter, mud outward transport by slush pump.
Following table is to adopt the present invention that organic pulp waste water is handled back water quality detection example.
Above-mentioned only is the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, and allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.
Claims (6)
1. the treatment unit of an APMP pulp-making waste-water, it is characterized in that: by the grid canal that connects in turn, regulate preliminary sedimentation tank, the shallow air-floatation device, intermediate pool, cooling tower, the UASB Sludge Bed, hydrolysis acidification pool, medium sediment pool, the CASS biochemistry pool, second pond and deep oxidation pond are formed, described second pond is connected with sludge thickener, sludge thickener inserts a belt water extracter, in the described hydrolysis acidification pool elastic filler is installed and is fixed in its surface so that cultivate acclimated microorganism with the microbial film form, effective residence time of described hydrolysis acidification pool is 5.84h, described CASS biochemistry pool comprises the biological selecting area that adopts anaerobic environment, the main reaction region that water quality is had aerobic area and the degradation of organic substances of shock absorption, main reaction region is provided with one makes mud long age, the oxygen system that sludge loading is low, be provided with dissolved oxygen on-line determination instrument in the described biological selecting area, its output signal inserts according to the dissolved oxygen value size and changes the PLC substation that sludge back flow quantity is carried out online adjusting, and the built-in combined with ozone thing in described deep oxidation pond is to reduce COD.
2. the treatment unit of a kind of APMP pulp-making waste-water as claimed in claim 1, it is characterized in that: described shallow air-floatation device, medium sediment pool and deep oxidation pond all are added with coagulating agent.
3. the treatment unit of a kind of APMP pulp-making waste-water as claimed in claim 2, it is characterized in that: described coagulating agent is aluminum chloride, and does coagulant aids with the epistasis cationic-type polyacrylamide.
4. the treatment unit of a kind of APMP pulp-making waste-water as claimed in claim 1, it is characterized in that: described medium sediment pool, second pond part mud are back to hydrolysis acidification pool, CASS biochemistry pool respectively, and other has part mud to deliver to sludge thickener with the mud in UASB Sludge Bed, hydrolysis acidification pool, deep oxidation pond to precipitate and concentrate the back and dewatered by the belt water extracter.
5. the treatment unit of a kind of APMP pulp-making waste-water as claimed in claim 1 is characterized in that: be 15.7d design mud age of described main reaction region, and described oxygen system is micropore blast aeration device.
6. the treatment unit of a kind of APMP pulp-making waste-water as claimed in claim 1, it is characterized in that: described combined with ozone thing is O
3/ UV/TiO
2
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| CN103043864A (en) * | 2012-12-07 | 2013-04-17 | 常州大学 | Treatment method of waste water in leather industry |
| CN103011528B (en) * | 2012-12-31 | 2013-09-25 | 江苏金润环境科技有限公司 | Comprehensive sewage treatment system and method |
| CN103739146A (en) * | 2013-11-15 | 2014-04-23 | 安徽省绿巨人环境技术有限公司 | Animal vaccine production wastewater treatment technology |
| CN104743742B (en) * | 2015-03-09 | 2016-08-17 | 常州大学 | A kind of chemi-mechanical pulp Waste Water Treatment |
| CN105384311B (en) * | 2015-12-09 | 2018-01-16 | 浦华环保股份有限公司 | A kind of method and its device for handling high concentration conurbation sewage |
| CN105502815B (en) * | 2015-12-10 | 2018-10-12 | 南京国能环保工程有限公司 | A kind of sludge drying condensation method for treating water |
| CN112047578A (en) * | 2020-09-11 | 2020-12-08 | 江苏南大华兴环保科技股份公司 | Recycling treatment process for pulping and papermaking wastewater |
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| US20050247622A1 (en) * | 2004-04-28 | 2005-11-10 | Long Dennis J | Anaerobic biological treatments |
| CN101659493A (en) * | 2008-08-27 | 2010-03-03 | 张飞虎 | Method for treating printing and dyeing wastewater |
| CN101734827B (en) * | 2009-12-29 | 2011-07-27 | 广西博世科环保科技股份有限公司 | Method for treating yeast wastewater |
| CN202576156U (en) * | 2012-04-09 | 2012-12-05 | 泉州市天龙环境工程有限公司 | Treatment device for APMP (Alkaline Peroxide Mechanical Pulp) pulping waste water |
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Effective date of registration: 20180111 Address after: 361006 Fujian city of Xiamen province China (Fujian) free trade zone five road Xiamen District No. 3 South 222 Gaoqi Aviation Business Plaza, No. 2 building eighth room 803 Patentee after: Zhongke Tianlong (Xiamen) environmental protection Limited by Share Ltd Address before: 362332 Fujian city of Quanzhou province Nanan Kang Mei Zhen Futiecun Patentee before: Tianlong Environment Engineering Co., Ltd., Guizhou City |
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