CN204325083U - A kind for the treatment of system of straw-pulp-papermaking wastewater - Google Patents
A kind for the treatment of system of straw-pulp-papermaking wastewater Download PDFInfo
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- CN204325083U CN204325083U CN201420754144.1U CN201420754144U CN204325083U CN 204325083 U CN204325083 U CN 204325083U CN 201420754144 U CN201420754144 U CN 201420754144U CN 204325083 U CN204325083 U CN 204325083U
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Abstract
The utility model relates to a kind for the treatment of system of straw-pulp-papermaking wastewater, comprise inlet channel, grid, equalizing tank, settling pit, anaerobic fixed film reactor, hydrolytic precipitation pool, aeration tank, secondary sedimentation basins, coagulation basin, air flotation pool, outlet conduit, sludge thickener, anaerobic sludge digestion pond, belt filter press, mud outward transport pipeline, described inlet channel, grid, equalizing tank, settling pit, anaerobic fixed film reactor, hydrolytic precipitation pool, aeration tank, secondary sedimentation basins, coagulation basin, air flotation pool is communicated with successively with outlet conduit, described equalizing tank, hydrolytic precipitation pool, secondary sedimentation basins, coagulation basin, anaerobic sludge digestion pond is all communicated with sludge thickener, belt filter press and anaerobic sludge digestion pond, mud outward transport pipeline communication.The paper waste of the utility model process, the good biodegradability of its water, water quality is good, reaches standard of drainage, solves the predicament of current paper industry wastewater treatment, compensate for the blank spot of existing pulping wastewater treatment technology, is applicable to popularity and uses.
Description
Technical field
The utility model relates to a kind for the treatment of system of straw-pulp-papermaking wastewater.
Background technology
China's paper industry total displacement is only second to chemical industry and iron and steel, occupy the 3rd of industrial sector quantity discharged, and COD (COD and Chemical Oxygen Demand, chemical oxygen demand (COD)) quantity discharged then accounts for 1/3rd of national industrial discharge amount.Therefore, paper industry water pollution control has become the focus of paper industry and even whole society's concern, and becomes the key of the papermaking enterprise survival and development.
Paper waste is one of main industrial pollution source of China.The straw fibers such as the careless bar of the many employings of China's paper-making industry as paper making raw material, relative wood pulp papermaking waste water, straw-pulp-papermaking wastewater complicated component, the BOD of waste water
5(biochemical oxygen demand (BOD))/COD (chemical oxygen demand (COD)) is about 0.25, and the biodegradability of water is poor, belongs to more unmanageable trade effluent, and how reasonably processing this kind of waste water is the significant problem that environmental engineering worker faces.
Utility model content
The purpose of this utility model is the defect overcoming prior art existence, provides a kind for the treatment of system of straw-pulp-papermaking wastewater.
The technical scheme realizing the utility model object is: a kind for the treatment of system of straw-pulp-papermaking wastewater, the treatment system of described straw-pulp-papermaking wastewater comprises inlet channel, grid, equalizing tank, settling pit, anaerobic fixed film reactor, hydrolytic precipitation pool, aeration tank, secondary sedimentation basins, coagulation basin, air flotation pool, outlet conduit, sludge thickener, anaerobic sludge digestion pond, belt filter press, mud outward transport pipeline, described inlet channel, described grid, described equalizing tank, described settling pit, described anaerobic fixed film reactor, described hydrolytic precipitation pool, described aeration tank, described secondary sedimentation basins, described coagulation basin, described air flotation pool is communicated with successively with described outlet conduit, described equalizing tank, described hydrolytic precipitation pool, described secondary sedimentation basins, described coagulation basin, described anaerobic sludge digestion pond is all communicated with described sludge thickener, described belt filter press and described equalizing tank, described anaerobic sludge digestion pond, described mud outward transport pipeline communication.
As optimization, the partial sludge of described hydrolytic precipitation pool is back to described anaerobic fixed film reactor, and excess sludge flows into described sludge thickener, and sewage flows into described aeration tank.
As optimization, the partial sludge of described secondary sedimentation basins is back to described aeration tank, and excess sludge flows into described sludge thickener, and sewage flows into described coagulation basin.
As optimization, the mud of described coagulation basin flows into described sludge thickener, and sewage flows into described air flotation pool.
As optimization, the drainage of described sludge thickener, described belt filter press is back to described equalizing tank.
The utility model has positive effect: when the utility model uses, first straw-pulp-papermaking wastewater enters grid by inlet channel and removes oarse-grained pollutent, then waste water enters the regulating water quality water yield in equalizing tank, enter settling pit again, in settling pit, the sand grains in waste water is got rid of, then waste water enters anaerobic fixed film reactor, in anaerobic fixed film reactor by the organism of the difficult degradation in waste water as Mierocrystalline cellulose, the acidications such as xylogen are micromolecular compound, improve the biodegradability of waste water, aerobic treatment in convenient aeration tank below, thus reduce COD, the content of BOD, waste water is after anaerobic fixed film reactor process, and waste water enters hydrolytic precipitation pool and carries out sewage, mud separation, and the sewage after hydrolytic precipitation pool is separated enters in aeration tank, the mud of separation, and a part of sludge reflux is to anaerobic fixed film reactor, and excess sludge flows into sludge thickener, sewage flows in aeration tank and carries out organic degraded, then waste water inflow secondary sedimentation basins carries out sewage again, the separation of mud, sewage after separation flows into coagulation basin, mud after separation, part sludge reflux is to aeration tank, excess sludge flows into sludge thickener, after sewage flows into coagulation basin, by small granular suspended matters coagulation in coagulation basin, precipitation, be separated, the mud precipitated in coagulation basin flows into sludge thickener, water in coagulation basin flow into air flotation pool, in air flotation pool, again the fine suspension in water is removed, last standard water discharge, discharged by outlet conduit, to flow in sludge thickener mud after concentrated, precipitation, sewage is sent into equalizing tank and is again processed, mud sends into sludge digestion tank anaerobic digestion, after mud after sludge digestion tank anaerobic digestion is dewatered by belt filter press, transport outward pipeline by mud to transport, sewage backflow processes again to equalizing tank.
Straw-pulp-papermaking wastewater after the utility model process, in the processing system, the biodegradability of first lifting waste water in anaerobic fixed film reactor, and then carry out aerobic treatment, water quality after precipitation process is good, and in water outlet, the contamination index such as COD and BOD all reaches standard of drainage, solves the predicament of current papermaking straw pulp industry wastewater treatment, compensate for the blank spot of existing straw-pulp-papermaking wastewater treatment technology, be applicable to popularity and use.
Accompanying drawing explanation
In order to make content of the present utility model more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 is the schematic flow sheet of straw-pulp-papermaking wastewater treatment system of the present utility model.
Embodiment
As shown in Figure 1, the utility model is a kind for the treatment of system of straw-pulp-papermaking wastewater, the treatment system of described straw-pulp-papermaking wastewater comprises inlet channel, grid, equalizing tank, settling pit, anaerobic fixed film reactor, hydrolytic precipitation pool, aeration tank, secondary sedimentation basins, coagulation basin, air flotation pool, outlet conduit, sludge thickener, anaerobic sludge digestion pond, belt filter press, mud outward transport pipeline, described inlet channel, described grid, described equalizing tank, described settling pit, described anaerobic fixed film reactor, described hydrolytic precipitation pool, described aeration tank, described secondary sedimentation basins, described coagulation basin, described air flotation pool is communicated with successively with described outlet conduit, described equalizing tank, described hydrolytic precipitation pool, described secondary sedimentation basins, described coagulation basin, described anaerobic sludge digestion pond is all communicated with described sludge thickener, described belt filter press and described equalizing tank, described anaerobic sludge digestion pond, described mud outward transport pipeline communication.The partial sludge of described hydrolytic precipitation pool is back to described anaerobic fixed film reactor, and excess sludge flows into described sludge thickener, and sewage flows into described aeration tank.The partial sludge of described secondary sedimentation basins is back to described aeration tank, and excess sludge flows into described sludge thickener, and sewage flows into described coagulation basin.The mud of described coagulation basin flows into described sludge thickener, and sewage flows into described air flotation pool.The drainage of described sludge thickener, described belt filter press is back to described equalizing tank.
Grid is used for bulk in filter sewage and suspends or floating pollutent, and ensure that follow-up structures, water pump, pipeline etc. normally run, the sewage after filtration flows into equalizing tank.
Because the water quality of trade effluent, the water yield change greatly, equalizing tank is used for regulating the water quality and quantity of waste water, and ensure the effect of follow-up structures process, the waste water after adjustment flows into settling pit.
Settling pit is for removing the larger particle of proportion, silt etc., and then sewage flows into anaerobic fixed film reactor.
The xylogen that COD composition in papermaking midcourse wastewater mainly dissolves, it is a kind of macromolecular compound, anaerobic activated sludge is had in anaerobic fixed film reactor, a large amount of anaerobion is had in anaerobic activated sludge, anaerobic fixed film reactor effect makes macromolecular compound decomposition be micromolecular acid exactly, improves the biodegradability of waste water, the aerobic treatment in convenient aeration tank below, thus reducing the content of COD, BOD, the sewage after anaerobic treatment flows into hydrolytic precipitation pool.
Hydrolytic precipitation pool is used for the separation of sewage, mud, during due to anaerobic fixed film reactor water outlet, a large amount of anaerobic activated sludge is entrained with in water, and the speed of growth of anaerobic activated sludge in anaerobic fixed film reactor is very slow, in order to ensure the decomposition efficiency of anaerobic fixed film reactor, hydrolytic precipitation pool is by this part sludge settling, then a part of sludge reflux is to anaerobic fixed film reactor, excess sludge flows into sludge thickener, also ensure that sludge quantity balance in hydrolytic precipitation pool, the sewage after hydrolytic precipitation pool process flows into aeration tank simultaneously.
Aeration tank is the principal facility of degradable organic pollutant, and the organism in sewage is decomposed, adsorbs under the effect of aerobic microbiological, thus reduces the concentration of pollutent, and the sewage after the process of aeration tank flows into secondary sedimentation basins.
The aerobic activated sludge that aeration tank is discharged carries out being separated, precipitating with the mixed solution of sewage in secondary sedimentation basins, sludge part after sedimentation will be back in aeration tank, ensure the amount of aerobic activated sludge in aeration tank, because containing microorganism in aerobic activated sludge, in aeration tank, contribute to the decomposition of aerobic microbiological, absorption, excess sludge just flows into sludge thickener, also ensure that sludge quantity balance in secondary sedimentation basins simultaneously; Sewage after secondary sedimentation basins process flows into coagulation basin.
Owing to there is a certain amount of suspension microorganism in secondary sedimentation basins, and a small amount of fiber fines, in coagulation basin, Xiang Shuizhong adds some coagulating agent and coagulant aids, the small-particle that in water, those are difficult to precipitate can be polymerized mutually, volume increases, and be then discharged in sludge thickener by after the solids precipitation of polymerization, the water in coagulation basin flow into air flotation pool.
By produce small bubbles by established in coagulation basin, be suspended in granular absorption in the water surface to self, by the floating of the floating drive particulate matter of bubble, thus by pollutant removal, the water after air flotation pool process just can Chinese effluent up to standard.
Sludge thickener, by sludge condensation, reduces the water ratio of mud, the volume of mud is reduced; Mud after sludge thickener process is similar to pasty state, still keeps mobility, and send in sludge digestion tank, sludge thickener sewage is out back to equalizing tank again and again processes.
Mud in sludge digestion tank after anaerobic digestion, part organic solid is converted into biogas, part organism forms the soil ulmin had good stability, thus the amount of solid reduced in mud, sludge volume can reduce more than 1/2, and the pathogenic microorganism in mud have also been obtained deactivation in various degree, be conducive to the further disposal and utilization of mud, the mud conveying belt belt filter press after sludge digestion tank process.
Belt filter press makes mud dewater further, reduced volume, and convenient outward transport, sewage backflow processes again to equalizing tank.
Embodiment:
Wastewater discharge Q=60000 ton/sky, i.e. Q=2500m3/h
The water quality of the middle-stage wastewater of certain papermaking straw pulp factory discharge is as follows: pH=6-9, SS=90-130mg/L (SS suspend solid, suspended solid are the important indicators of water quality), BOD
5=250-400mg/L, COD=2000-2500mg/L.
When the utility model uses: when the utility model uses, first straw-pulp-papermaking wastewater enters grid by inlet channel and removes oarse-grained pollutent, then waste water enters the regulating water quality water yield in equalizing tank, enter settling pit again, in settling pit, the sand grains in waste water is got rid of, then waste water enters anaerobic fixed film reactor, in anaerobic fixed film reactor by the organism of the difficult degradation in waste water if the acidication such as Mierocrystalline cellulose, xylogen is micromolecular compound, improve the biodegradability of waste water, aerobic treatment in convenient aeration tank below, thus reduce the content of COD, BOD, waste water is after anaerobic fixed film reactor process, and waste water enters hydrolytic precipitation pool and carries out sewage, mud separation, and the sewage after hydrolytic precipitation pool is separated enters in aeration tank, the mud of separation, and a part of sludge reflux is to anaerobic fixed film reactor, and excess sludge flows into sludge thickener, sewage flows in aeration tank and carries out organic degraded, then waste water inflow secondary sedimentation basins carries out sewage again, the separation of mud, sewage after separation flows into coagulation basin, mud after separation, part sludge reflux is to aeration tank, excess sludge flows into sludge thickener, after sewage flows into coagulation basin, by small granular suspended matters coagulation in coagulation basin, precipitation, be separated, the mud precipitated in coagulation basin flows into sludge thickener, water in coagulation basin flow into air flotation pool, in air flotation pool, again the fine suspension in water is removed, last standard water discharge, discharged by outlet conduit, to flow in sludge thickener mud after concentrated, precipitation, sewage is sent into equalizing tank and is again processed, mud sends into sludge digestion tank anaerobic digestion, after mud after sludge digestion tank anaerobic digestion is dewatered by belt filter press, transport outward pipeline by mud to transport, sewage backflow processes again to equalizing tank.
The effluent quality reached: pH=6-9, SS≤150mg/L, BOD5≤100mg/L, COD≤300mg/L
Each processing unit treatment effect is as following table:
| Processing unit | Project (mg/l) | PH | COD | BOD | SS |
| Former water | 6-9 | 2500 | 400 | 130 | |
| Grid | Clearance | － | 0 | 0 | 80％ |
| Aqueous concentration | 6-9 | 2500 | 400 | 26 | |
| Equalizing tank | Clearance | － | 0 | 0 | 0 |
| Aqueous concentration | 6-9 | 2500 | 400 | 26 | |
| Settling pit | Clearance | － | 10％ | 5％ | 30％ |
| Aqueous concentration | 6-9 | 2250 | 380 | 18.2 | |
| Anaerobic waste water pond | Clearance | － | 30％ | 30％ | － |
| Aqueous concentration | 6-9 | 1575 | 266 | 18.2 | |
| Hydrolytic precipitation pool | Clearance | － | 20％ | 20％ | － |
| Aqueous concentration | 6-9 | 1260 | 212.8 | 18.2 | |
| Aeration tank and secondary sedimentation basins | Clearance | － | 85％ | 90％ | － |
| Aqueous concentration | 6-9 | 189 | 21.28 | 18.2 | |
| Coagulation basin and air flotation pool | Aqueous concentration | － | 25％ | 25％ | － |
| Clearance | 6-9 | 141.75 | 15.96 | 18.2 | |
| Require target | Aqueous concentration | ≤6-9 | ≤150 | ≤100 | ≤300 |
As can be seen from this embodiment, straw-pulp-papermaking wastewater after the utility model process, in the processing system, the biodegradability of first lifting waste water in anaerobic fixed film reactor, and then carry out aerobic treatment, the water quality after precipitation process is good, in water outlet, the contamination index such as COD and BOD all reaches the standard of drainage requiring target, solve the predicament of current papermaking straw pulp industry wastewater treatment, compensate for the blank spot of existing straw-pulp-papermaking wastewater treatment technology, be applicable to popularity and use.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. the treatment system of a straw-pulp-papermaking wastewater, it is characterized in that: the treatment system of described straw-pulp-papermaking wastewater comprises inlet channel, grid, equalizing tank, settling pit, anaerobic fixed film reactor, hydrolytic precipitation pool, aeration tank, secondary sedimentation basins, coagulation basin, air flotation pool, outlet conduit, sludge thickener, anaerobic sludge digestion pond, belt filter press, mud outward transport pipeline, described inlet channel, described grid, described equalizing tank, described settling pit, described anaerobic fixed film reactor, described hydrolytic precipitation pool, described aeration tank, described secondary sedimentation basins, described coagulation basin, described air flotation pool is communicated with successively with described outlet conduit, described equalizing tank, described hydrolytic precipitation pool, described secondary sedimentation basins, described coagulation basin, described anaerobic sludge digestion pond is all communicated with described sludge thickener, described belt filter press and described equalizing tank, described anaerobic sludge digestion pond, described mud outward transport pipeline communication.
2. the treatment system of a kind of straw-pulp-papermaking wastewater according to claim 1, is characterized in that: the partial sludge of described hydrolytic precipitation pool is back to described anaerobic fixed film reactor, and excess sludge flows into described sludge thickener, and sewage flows into described aeration tank.
3. the treatment system of a kind of straw-pulp-papermaking wastewater according to claim 2, is characterized in that: the partial sludge of described secondary sedimentation basins is back to described aeration tank, and excess sludge flows into described sludge thickener, and sewage flows into described coagulation basin.
4. the treatment system of a kind of straw-pulp-papermaking wastewater according to claim 3, is characterized in that: the mud of described coagulation basin flows into described sludge thickener, and sewage flows into described air flotation pool.
5. the treatment system of a kind of straw-pulp-papermaking wastewater according to any one of claim 1 to 4, is characterized in that: the drainage of described sludge thickener, described belt filter press is back to described equalizing tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420754144.1U CN204325083U (en) | 2014-12-04 | 2014-12-04 | A kind for the treatment of system of straw-pulp-papermaking wastewater |
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| CN201420754144.1U CN204325083U (en) | 2014-12-04 | 2014-12-04 | A kind for the treatment of system of straw-pulp-papermaking wastewater |
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| CN204325083U true CN204325083U (en) | 2015-05-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109095724A (en) * | 2018-09-20 | 2018-12-28 | 中国宣纸股份有限公司 | A kind of fibrous raw material of Xuan paper wingceltis skin impregnates the processing method of waste water |
| CN111573995A (en) * | 2020-06-05 | 2020-08-25 | 江西省顺丰纸业有限责任公司 | Papermaking sewage recycling process |
-
2014
- 2014-12-04 CN CN201420754144.1U patent/CN204325083U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109095724A (en) * | 2018-09-20 | 2018-12-28 | 中国宣纸股份有限公司 | A kind of fibrous raw material of Xuan paper wingceltis skin impregnates the processing method of waste water |
| CN111573995A (en) * | 2020-06-05 | 2020-08-25 | 江西省顺丰纸业有限责任公司 | Papermaking sewage recycling process |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20181204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |