CN102491552A - Method for low temperature rapid removal of COD and ammonia nitrogen material in wastewater - Google Patents
Method for low temperature rapid removal of COD and ammonia nitrogen material in wastewater Download PDFInfo
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- CN102491552A CN102491552A CN2011103786012A CN201110378601A CN102491552A CN 102491552 A CN102491552 A CN 102491552A CN 2011103786012 A CN2011103786012 A CN 2011103786012A CN 201110378601 A CN201110378601 A CN 201110378601A CN 102491552 A CN102491552 A CN 102491552A
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Abstract
The invention relates to a method for low temperature rapid removal of COD and an ammonia nitrogen material in wastewater. The method comprises: adding a flocculating agent to the wastewater and carrying out a flocculating treatment, wherein the wastewater is subjected to a two-stage treatment; inputting the treated fluid to an air floating selection pool; finally inputting the resulting fluid to a powerful fast absorbing fiber adsorption tower to carry out adsorption filtration to obtain the filtered effluent. According to the present invention, the method of the present invention is applicable for the treatment of the ordinary city sewage and the low temperature treatment of the non-urban sewage; at the low temperature of 5-15 DEG C, the COD content is 50-200 mg/L, the ammonia nitrogen material content is in the range of 10-100 mg/L, after adjusting the operation and operation coefficient, the COD in the filtered effluent is less than or equal to 50 mg/L, and even less than 20 mg/L, and the amount of the produced concentrated water is less than 1% of the amount of the treated water; the filler inside the tower can be successfully subjected to elution regeneration, the service life is more than 5 years, the operating cost of the present invention is 1/20 of the operating cost by using the RO membrane technology, and the construction investment of the present invention is 1/5 of the construction investment by using the RO membrane technology.
Description
Technical field
The present invention relates to a kind of low temperature and remove the method for COD in the waste water, ammonia nitrogen material fast, belong to WWT purification techniques field.
Background technology
As everyone knows, all there are high concentration of COD, ammonia nitrogen material in any sewage,, generally use drug precipitation clarifying treatment or biochemical treatments such as flocculation agent because major part is the dispersed material.But always some The dissolved COD, ammonia nitrogen material not only are not easy oxidation, coagulation, and almost do not have biodegradability, and intractability is very big.The significantly raising of new discharging standards makes traditional treatment method receive severe challenge.At present, this COD, ammonia nitrogen material are removed and can only be adopted RO membrane reverse osmosis method to handle.But r-o-not only construction investment is very high, and running cost water per ton surpasses 10 yuan, and general owner can't bear.Moreover when membrane filtration was removed the above COD of 200mg/L, ammonia nitrogen material, finished product water accounted for 50% at most, and the dense water of residue 50% will be more hard to manage.Simultaneously, the biochemical process of WWT can not be brought into play it in the winter time during low temperature and purifies and render a service.
Therefore, be badly in need of a kind of materilization freatment method that can when low temperature (5～15 ℃), can normally move, meanwhile, should guarantee also that this technology running cost is low, floor space is little, easy and simple to handle, the expense that guarantees investment and operation.To above problem, in recent years, I concentrated on studies at company's process, developed the fast fibre sucking tower of strong effect and the method thereof of absorption principle, in order to remove the most unmanageable COD of low concentration, ammonia nitrogen material.
Summary of the invention
The present invention has overcome in COD in the waste water, the ammonia nitrogen substance processing method, and the problem that RO membrane reverse osmosis method cost is high, the biochemical process low temperature environment can't be suitable for down provides a kind of efficient, removal method that cost is low.
A kind of low temperature is removed the method for COD in the waste water, ammonia nitrogen material fast; Method is following: in the waste water of second-stage treatment, adding flocculation agent and carrying out flocculation treatment; Again the pond is selected in above-mentioned treatment solution input air supporting, the fast fibre sucking adsorption tower of the strong effect of input at last carries out adsorption filtration, and water outlet gets final product.The waste water of second-stage treatment is the general address of sewage treatment area; What second-stage treatment was the most frequently used is biological treatment; It can remove the organism that is colloid and dissolved state in the waste water significantly; But also retain algae increment nutrition such as a certain amount of suspended substance, biological indissoluble dissolved organic matter, solvability inorganics and nitrogen phosphorus, and contain virus and bacterium.
Further, strong mesopore parameter of imitating fast fibre sucking is specially in the fast fibre sucking adsorption tower of said strong effect: median pore diameter is 3～10nm, and mesopore volume and fiber holes volume ratio are 40～70% (being effective porosity).Preferably, median pore diameter is 4～6nm, and mesopore volume is 45～65% with fiber total pore volume ratio.
The fast fibre sucking employing of strong effect cotton is starting material in the fast fibre sucking adsorption tower of said strong effect, generates through high-temperature activation, two steps of chemical modification, and finished fiber is a felted.Particularly, this tower mainly is made up of tower body itself and internal structure, and tower body generally adopts 2.0 meters of diameters, 3.5 meters of height, and material is that carbon steel material gets final product, this tower body is public offering on market, does not do too much introduction at this.Wherein, imitating fast fibre sucking employing cotton by force is starting material, generates through high-temperature activation, two steps of chemical modification, and finished fiber is a felted, is the high-efficiency activated fiber that performance is superior to gac.Ultramicron wherein combines in every way, forms abundant nanometer space, and these spatial sizes of formation are in the same order of magnitude with ultramicron, thereby have brought up bigger specific surface area.Many erratic composition-heterocycle structures that it contains or contain surface functional group, this is to cause the major cause that the fast fibre sucking specific surface area of strong effect is big, adsorption desorption speed is fast, adsorption efficiency is high.
Said flocculation agent is inorganic flocculating agent polymer alumina or polyaluminium sulfate, and dosage is 10～20mg/L, or is the organic floculant SEPIGEL 305, and dosage is 0.3～0.8mg/L.
Air supporting selects the operational condition in pond to do, gas content was not less than 10mg/ L during air water mixed, and flow velocity is 10～30m/h.
Strong operating pressure of imitating fast fibre sucking adsorption tower is 0.1～0.4Mpa, and flow velocity is 15～30m/h.
During operation; Always add an amount of flocculation agent in the water, impurity such as the suspended substance in the former water, colloid, bacterium algae, oils are taken off steady effect and broken truss role, select materials such as gas water-soluble in the water are discharged with the form of scum silica frost through air supporting then; At last through the fast fibre sucking adsorption tower absorption of strong effect; Make most of small-molecule substance absorption, thereby reduce COD, ammonia nitrogen substances content in the water, and can effectively improve turbidity and the colourity in the water.
Can adopt two kinds of method desorbs after the fast fibre sucking adsorption tower absorption of strong effect is saturated, the one, adopt the steam desorption and regeneration, should feed 2～3 kilograms of pressure saturation steams then earlier the jar emptying before the regeneration, about 30 minutes is a renewable single tower; Two are to use 3% sodium hydroxide solution, behind the void tower solution are squeezed into 3 kilograms of pressure to get final product, and consume solution at every turn and be 2 times of adsorption tower volume.Desorb water contains the high concentration COD of several ten thousand milligrams per liters, can enter the desorb liquid pool, makes its deposition behind the adding medicament, and supernatant returns biochemical preceding equalizing tank, and throw out is buried or fermented manure through the pressure filter squeezing, also can sprinkle coal and burn.
The method that low temperature of the present invention is removed COD in the waste water, ammonia nitrogen material fast is applicable to the subzero treatment of common municipal sewage treatment and non-municipal effluent; 5～15 ℃ of low temperature; COD content is that 50～200mg/L, ammonia nitrogen substances content are in 10～100mg/L scope, through adjustment operation and stream coefficient, and water outlet COD≤50mg/L even can reach below the 20mg/L; Produce dense water less than handling 1% of the water yield; And inner-tower filling material wash-out regeneration smoothly, work-ing life, running cost and construction investment were respectively 1/20th and 1/5th of RO membrane technique more than 5 years.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Embodiment 1
Adopt present embodiment 1 method to handle the city secondary waste water of northern China, TR is 8～15 ℃, and medial temperature is 12 ℃, and COD concentration is 120mg/L, and ammonia nitrogen concentration is 50mg/L, and the water yield is 100 tons/hour, and water yield variation range is ± 10%.
Strong specific surface area of imitating fast fibre sucking is 2000m
2/ g, effective porosity are 95%, and the mesopore parameter is: median pore diameter is 3nm, and mesopore volume and fiber holes volume ratio are 55%.
During operation, waste water and 10 minutes postprecipitations of flocculant poly aluminum chloride association reaction, flocculant addition is 15mg/L; Select the pond with the velocity flow of 10m/h through air supporting then, it is 13mg/L that the gas content in pond is selected in air supporting; Flow through with the flow velocity of 15m/h at last and imitate fast fibre sucking adsorption tower by force, adopt advection to advance, operating pressure is 0.15Mpa, moves from bottom to top with pipe core.
The monomer cycle of operation is 48 hours, and treatment capacity is 1000 tons, and COD is 30mg/L in the processing back water outlet, and ammonia nitrogen is 7mg/L, and the waste water after the processing can reuse or directly discharging.
Embodiment 2
Waste water is embodiment 1 said city secondary waste water, and difference is: the mesopore parameter of imitating fast fibre sucking by force is: median pore diameter is 6nm, and mesopore volume and fiber holes volume ratio are 70%.
During operation, waste water and 10 minutes postprecipitations of flocculant poly Tai-Ace S 150 association reaction, flocculant addition is 20mg/L; Select the pond with the velocity flow of 20m/h through air supporting then, it is 12mg/L that the gas content in pond is selected in air supporting; Flow through with the flow velocity of 22m/h at last and imitate fast fibre sucking adsorption tower by force, adopt advection to advance, operating pressure is 0.25Mpa, moves from bottom to top with pipe core.
The monomer cycle of operation is 48 hours, and treatment capacity is 800 tons, and COD is 33mg/L in the processing back water outlet, and ammonia nitrogen is 8mg/L, and the waste water after the processing can reuse or directly discharging.
Embodiment 3
Waste water is embodiment 1 said city secondary waste water, and difference is: the mesopore parameter of imitating fast fibre sucking by force is: median pore diameter is 10nm, and mesopore volume and fiber holes volume ratio are 40%.
During operation, waste water and 10 minutes postprecipitations of flocculation agent SEPIGEL 305 association reaction, flocculant addition is 0.55mg/L; Select the pond with the velocity flow of 30m/h through air supporting then, it is 12mg/L that the gas content in pond is selected in air supporting; Flow through with the flow velocity of 30m/h at last and imitate fast fibre sucking adsorption tower by force, adopt advection to advance, operating pressure is 0.4Mpa, moves from bottom to top with pipe core.
The monomer cycle of operation is 48 hours, and treatment capacity is 900 tons, and COD is 35mg/L in the processing back water outlet, and ammonia nitrogen is 8mg/L, and the waste water after the processing can reuse or directly discharging.
Embodiment 4
After wastewater treatment is carried out 48 hours among the embodiment 1, should wash the fast fibre sucking adsorption tower of strong effect, the monomer dry weight is 100kg when just adorning; Be 180kg after the clear water moisture absorption, be weighed as 205kg after the use, the fiber after using is washed; Pressure is 0.3Mpa, and the time is 8 minutes.Be weighed as 180.50kg after the flushing, analyzing reason possibly be because fiber pressure in the process of using causes due to the fibre density increase.Fiber after the flushing comes into operation again, realizes the desorb to the fast fibre sucking of strong effect with this.
Keep above-mentioned condition constant, the fiber after reusing is washed and weighs, obtaining weight is 180.49kg, and variable quantity is less than per mille.Can ignore.This shows, imitate by force fast fibre sucking use and desorb after, quality does not reduce, and can adapt to the engineering of water treatment midium or long term, the high loading utilization and operation guarantees efficient processing efficiency simultaneously.
Claims (8)
1. a low temperature is removed the method for COD in the waste water, ammonia nitrogen material fast; It is characterized in that; Method is following: in the waste water of second-stage treatment, adding flocculation agent and carrying out flocculation treatment; Again the pond is selected in above-mentioned treatment solution input air supporting, the fast fibre sucking adsorption tower of the strong effect of input at last carries out adsorption filtration, and water outlet gets final product.
2. remove the method for COD in the waste water, ammonia nitrogen material fast according to the described low temperature of claim 1; It is characterized in that; Strong mesopore parameter of imitating fast fibre sucking is in the fast fibre sucking adsorption tower of said strong effect: median pore diameter is 3～10nm, and mesopore volume and fiber holes volume ratio are 40～70%.
3. remove the method for COD in the waste water, ammonia nitrogen material according to the described low temperature of claim 1 fast, it is characterized in that median pore diameter is 4～6nm, mesopore volume is 45～65% with fiber total pore volume ratio.
4. remove the method for COD in the waste water, ammonia nitrogen material fast according to the described low temperature of claim 1; It is characterized in that; The fast fibre sucking employing of strong effect cotton is starting material in the fast fibre sucking adsorption tower of said strong effect, generates through high-temperature activation, two steps of chemical modification, and finished fiber is a felted.
5. remove the method for COD in the waste water, ammonia nitrogen material according to the described low temperature of the arbitrary claim of claim 2-4 fast, it is characterized in that the operating pressure of imitating fast fibre sucking adsorption tower by force is 0.1～0.4Mpa, flow velocity is 15～30m/h.
6. remove the method for COD in the waste water, ammonia nitrogen material according to the described low temperature of the arbitrary claim of claim 2-4 fast, it is characterized in that said flocculation agent is polymer alumina or polyaluminium sulfate, dosage is 10～20mg/L.
7. remove the method for COD in the waste water, ammonia nitrogen material according to the described low temperature of the arbitrary claim of claim 2-4 fast, it is characterized in that said flocculation agent is a SEPIGEL 305, dosage is 0.3～0.8mg/L.
8. remove the method for COD in the waste water, ammonia nitrogen material according to the described low temperature of the arbitrary claim of claim 2-4 fast, it is characterized in that, air supporting selects the operational condition in pond to do, the content of gas was not less than 10mg/ L during air water mixed, and flow velocity is 10～30m/h.
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| CN201110378601.2A CN102491552B (en) | 2011-11-24 | 2011-11-24 | Method for low temperature rapid removal of COD and ammonia nitrogen material in wastewater |
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| CN201110378601.2A CN102491552B (en) | 2011-11-24 | 2011-11-24 | Method for low temperature rapid removal of COD and ammonia nitrogen material in wastewater |
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Cited By (1)
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| CN105505810A (en) * | 2015-09-16 | 2016-04-20 | 广州金水动物保健品有限公司 | Microbe composition and use thereof |
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| CN102120657A (en) * | 2011-01-28 | 2011-07-13 | 姜雪 | Fluorine removing process and device for drinking water |
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2011
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Patent Citations (3)
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| CN1765776A (en) * | 2004-10-27 | 2006-05-03 | 贵阳铝镁设计研究院 | Electrolytic aluminium factory production waste water disposal method |
| KR100954886B1 (en) * | 2008-02-19 | 2010-04-28 | 전북대학교산학협력단 | Method and apparatus for recycling sewage and waste water by highly oxidative treatment |
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| CN105505810A (en) * | 2015-09-16 | 2016-04-20 | 广州金水动物保健品有限公司 | Microbe composition and use thereof |
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