CN102531267A - Advanced treatment recycling process for wastewater generated by deep processing of maize - Google Patents
Advanced treatment recycling process for wastewater generated by deep processing of maize Download PDFInfo
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- CN102531267A CN102531267A CN201010590826XA CN201010590826A CN102531267A CN 102531267 A CN102531267 A CN 102531267A CN 201010590826X A CN201010590826X A CN 201010590826XA CN 201010590826 A CN201010590826 A CN 201010590826A CN 102531267 A CN102531267 A CN 102531267A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses an advanced treatment recycling process for wastewater generated by deep processing of maize. The advanced treatment recycling process comprises the following steps of: (a) directly pumping effluent formed by conventional secondary treatment on wastewater generated by deep processing of maize purchased by enterprises into a BAF (Biological Aerated Filter) reaction tank, effectively removing organic matters in the wastewater under the actions of biochemical and filtering actions in a filler layer and introducing upper-layer clear water into a clean water tank; (b) introducing the wastewater treated by the BAF into an ultrafiltration device to remove biologic contaminants, particulate matters, colloid, turbidity and bacteria in the wastewater; and (c) introducing the wastewater subjected to ultrafiltration in a reverse osmosis system for desalting to obtain reverse osmosis effluent, wherein the reverse osmosis effluent can be used as complemented water of water in a cooling circular system.
Description
Technical field
The present invention relates to through the corn deep processing enterprise wastewater after certain conventional second-stage treatment again through the technology of advanced treatment and reclamation in circulating cooling system, specifically be meant corn deep processing waste water after advanced treatment reach " Code for design of industrial recirculating cooling water treatment " (GB50050-2007) in about the cooling recirculation system water quality requirement.
Background technology
China is the country of a water resources shortage, water resources ownership per capita 2500m
3, be 1/5 of world's per capita share, along with socioeconomic fast development, the contradiction of lack of water is on the rise.And China's water is higher, and it is 5～10 times of developed country that ten thousand yuan of industry increases water withdrawal, and the service water reclamation rate is lower than 30%, and water treatment and water use efficiency technology are and can reach the level of medium-developed country.Corn deep processing enterprise is the water consumption rich and influential family; As 2004; About 53,110 ten thousand t/a of total water amount of whole nation corn deep processing enterprise main products; The all contaminations that discharges in its course of processing is the organic waste water of high density especially, also makes corn deep processing enterprise become the rich and influential family of higher concentration organic contamination.Therefore; Corn is added waste water deeply carry out advanced treatment and be back to use circulating cooling system, can practice thrift a large amount of fresh water consumptions on the one hand, also directly reduced the quantity discharged of contaminated wastewater thing simultaneously; To enterprise's water saving, realize that energy-saving and emission-reduction have important promotion meaning.
Advanced waste treatment method commonly used has multiple, comprises traditional wastewater advanced treatment technology (filtration, absorption, coagulating sedimentation and sterilization), membrane separation technique, photochemical catalytic oxidation and ozonation technology etc.The corn deep processing enterprise wastewater will be back to use in the recirculating cooling water system after conventional second-stage treatment, and the subject matter of existence has two: the one, and saltiness is high in the waste water, i.e. Cl
-Concentration is high; The 2nd, the organism difficulty of further degrading in the waste water.For this waste water, single advanced treatment process can not meet the demands, and the optimum combination of taking multiple monotechnics is the key of waste water advanced processing and reuse.To the characteristics of corn deep processing waste water secondary treatment yielding water, take the technology of BAF (BFA)+ultrafiltration (UF)+r-o-(RO) system in combination to carry out advanced treatment.
Summary of the invention
The object of the present invention is to provide a kind of corn deep processing waste water advanced treatment recovery method; Be about to carry out advanced treatment through the corn deep processing enterprise wastewater after certain conventional second-stage treatment, make its water quality can reach " Code for design of industrial recirculating cooling water treatment " (GB50050-2007) in about cooling recirculation system make up water water quality requirement.
For realizing above-mentioned purpose, technical scheme of the present invention is following:
A) water outlet of enterprise's corn deep processing waste water after conventional second-stage treatment directly gets in the BAF reaction tank through force (forcing) pump, and biochemical and filtering effect is effectively removed the organism in the waste water through packing layer, and the upper strata clear water is from flowing into clean water basin;
B) waste water after BAF handles gets into ultra-filtration equipment, removes biological pollutant, PM for particulate matter, colloid, turbidity and bacterium in the waste water;
C) waste water after the ultrafiltration enters into reverse osmosis system and carries out desalination, obtains the r-o-water outlet, can be used as cooling recirculation system water make up water and uses.
In the said method; BAF adopts the lower end water inlet among the step a, and waste water at first gets into the cloth tank, evenly travels up to BAF filler supporting layer and filtering layer; Waste water upwards gets into the clear water layer through the two-stage packing layer; Be respectively one-level haydite and secondary haydite in the packing layer from bottom to top, one-level haydite particle diameter is 3～6mm, and secondary haydite particle diameter is 0.5～2mm; The filter tank technique gas distribution system adopts the disc type micro-hole aerator.
In the said method, adding in the waste water of ultrafiltration among the step b has reductive agent and Scale inhibitors.
Advantage of the present invention and active effect are embodied in:
Adopt the pretreatment technology of BAF as reverse osmosis system; Because it has salt tolerance and anti impulsion load ability preferably; Ultrafiltration and reverse osmosis system associated treatment high slat-containing wastewater with the rear end; Can guarantee that advanced waste treatment system is efficient, in the steady running, effectively reduce investment and working cost.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
1, secondary ceramics filling layer (particle diameter is 0.5～2mm), 2, one-level ceramics filling layer (particle diameter is 3～6mm), 3, the disc type micro-hole aerator, 4, water inlet pipe (being the back flushing water pipe during back flushing), 5, aeration uses gas blower, 6, backwash pump.
The BAF synoptic diagram of Fig. 2 for adopting in the technology of the present invention.
Embodiment
Further specify embodiment of the present invention below in conjunction with accompanying drawing; The waste water advanced processing technological flow figure that the present invention adopts and install as depicted in figs. 1 and 2; Need to prove; Each unit is well-known components in the complete assembly of the present invention, and each unit that therefore in description, it is adopted does not elaborate, and only provides the BAF structural representation in the accompanying drawing.
Embodiment
Certain corn deep processing enterprise, waste water adopts the IC+ aerobic process, and COD is 60～100mg/L in the processing back water outlet, Cl
-Be 1000mg/L.Adopt technology of the present invention to handle, flow process is following:
A) pending waste water gets in the BAF through force (forcing) pump, and the major function of BAF is the organism of further removing in the water.
BAF is periodic duty, finishes to finish for complete cycle from beginning to be filtered to back flushing.Detailed process is following:
Waste water and air all get into BAF from the bottom, inject tank body through Machinery Diaphragm Pump through bottom, filter tank water distributor, and flow is by ball valve and spinner-type flowmeter control.Air is supplied with by air, and to the water body oxygenation, tolerance is also by being controlled by ball valve and spinner-type flowmeter behind the aeration head uniform aeration of aeration and biological filter post bottom.Water-out manners adopts tank body top overflow weir overflow water outlet.Normal course of operation is the air water concurrent, through filter material layer the time, makes the COD in the former water obtain degraded, and SS reduces.Through operation after a while, owing to holding back and biomembranous aging coming off of SS in the former water, make and filter head loss increase in the post that effluent quality worsens, and at this moment must carry out back flushing to recover its processing power to BAF.During back flushing, close water intaking valve, open air (adjustments of gas flow); Advanced promoting the circulation of qi is washed, and opens backwash pump (adjusting discharge) then and carries out combined water and air backwash, closes air at last; Clean with treating water, the back flushing water outlet is discharged by the filter column top.
B) waste water after BAF handles gets into ultra-filtration equipment, removes biological pollutant, PM for particulate matter, colloid, turbidity and bacterium in the waste water;
C) waste water after the ultrafiltration is after adding reductive agent, Scale inhibitors and biocide; Enter into reverse osmosis system through HPP and carry out desalination; The reverse osmosis system major function is the salinity that removes in the water, and cooling recirculation system water make up water water quality requirement is satisfied in the r-o-water outlet that obtains.Reverse osmosis system mainly comprises RO desalination unit, dosing unit, service pump and matting unit.
In sum, the raw water quality situation before water quality after art breading of the present invention and the processing is seen shown in the table 1.
Table 1 raw water quality and each unit effluent quality situation
Can find out by last table; Art breading technology of the present invention is really effectively handling on the conventional secondary treatment yielding water of corn deep processing enterprise wastewater; Effluent quality satisfy fully " Code for design of industrial recirculating cooling water treatment " (GB50050-2007) in about cooling recirculation system make up water water quality requirement, can be used as cooling recirculation system water make up water and use.
Claims (3)
1. the advanced treatment recycling technique of corn deep processing waste water after the conventional second-stage treatment is characterized in that, may further comprise the steps:
A) water outlet of enterprise's corn deep processing waste water after conventional second-stage treatment directly gets in the BAF reaction tank through force (forcing) pump, removes the organism in the waste water effectively through packing layer biochemistry and filtering effect, and the upper strata clear water is from flowing into clean water basin;
B) waste water after BAF handles gets into ultra-filtration equipment, removes biological pollutant, PM for particulate matter, colloid, turbidity and bacterium in the waste water;
C) waste water after the ultrafiltration enters into reverse osmosis system and carries out desalination, obtains the r-o-water outlet, can be used as cooling recirculation system water make up water and uses.
The method of claim 1, wherein among the step a BAF adopt the lower end water inlet; Waste water at first gets into the cloth tank; Evenly travel up to BAF filler supporting layer and filtering layer, waste water upwards gets into the clear water layer through the two-stage packing layer, is respectively one-level haydite and secondary haydite in the packing layer from bottom to top; One-level haydite particle diameter is 3～6mm, and secondary haydite particle diameter is 0.5～2mm; The filter tank technique gas distribution system adopts the disc type micro-hole aerator.
3. the method for claim 1, wherein add in the waste water of ultrafiltration among the step b reductive agent and Scale inhibitors are arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010590826XA CN102531267A (en) | 2010-12-16 | 2010-12-16 | Advanced treatment recycling process for wastewater generated by deep processing of maize |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010590826XA CN102531267A (en) | 2010-12-16 | 2010-12-16 | Advanced treatment recycling process for wastewater generated by deep processing of maize |
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| Publication Number | Publication Date |
|---|---|
| CN102531267A true CN102531267A (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010590826XA Pending CN102531267A (en) | 2010-12-16 | 2010-12-16 | Advanced treatment recycling process for wastewater generated by deep processing of maize |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103232122A (en) * | 2013-04-25 | 2013-08-07 | 合肥锦泰糖业有限公司 | Treatment method of rice-washing waste water |
| CN105565585A (en) * | 2014-11-06 | 2016-05-11 | 中国环境科学研究院 | Corn deep-processing wastewater treatment and protein recovery method |
-
2010
- 2010-12-16 CN CN201010590826XA patent/CN102531267A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103232122A (en) * | 2013-04-25 | 2013-08-07 | 合肥锦泰糖业有限公司 | Treatment method of rice-washing waste water |
| CN103232122B (en) * | 2013-04-25 | 2015-04-01 | 合肥锦泰糖业有限公司 | Treatment method of rice-washing waste water |
| CN105565585A (en) * | 2014-11-06 | 2016-05-11 | 中国环境科学研究院 | Corn deep-processing wastewater treatment and protein recovery method |
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Application publication date: 20120704 |