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1、英文文献-氧化沟工艺在污水处理中的应用与发展 Oxidize the ditch craft in dirty water handle of application and development Summary: This text expatiated primarily the Carrousel oxidizes the construction, craft mechanism of the ditch and circulate the problem exsited in the process with the homologous the method of solutio
2、n.Finally, introduce the Carrousel oxidize the latest research progress of the ditch and pointed out the future and main research direction. Key phrase: The Carrousel oxidizes the ditch divideds by the phosphor takes off the nitrogen construction mechanism Application and Development of Carrousel Ox
3、idation Ditch Process on Wastewater Treatment Abstract: The structure and the techniques of carrousel oxidation ditch process on nitrogen and phosphor removal are introduced in this paper. The problems inrunning and their corresponding resolvent are also pointed. At last, The authorshowed the up to
4、date research improvement and the mainly future research dire-ction Key words: Carrousel; oxidation ditch; nitrogen and phosphor removal; structure;techniques 1. Foreword Oxidize the ditch oxidation ditch again a continuous circulation spirit pond Continuous loop reactor, is a live and dirty mire me
5、thod a kind of to transform.Oxidizing the dirty water in ditch handles the craft be researched to manufacture by the hygiene engineering graduate school of Holland in the 50s of 20 centuries success.Since in 1954 at Dutch throw in the usage for the very first time.Because its a water fluid matter go
6、od, circulate the stability and manage convenience etc. technique characteristics, already at domestic and international and extensive application in live the dirty water to is dirty to manage aqueously with the industry1. Current application than oxidize extensively the ditch type include:The Pasve
7、er oxidizes the ditch, the Carrousel oxidizes the ditch, Orbal oxidizes the ditch, the type of T oxidizes the ditch three ditch types oxidize the ditch, the type of DE oxidizes the ditch to turn to oxidize the ditch with the integral whole.These oxidize the ditch because of the difference of esse in
8、 construction with circulating, therefore each characteristics2.This text will introduce construction, mechanism, existent problem and its latest developments that Carrousel oxidize ditches primarily. 2. The Carrousel oxidizes the construction of the ditch The Carrousel oxidize the ditch to be resea
9、rched to manufacture by Dutch DHV company development in 1967.Oxidize the last the company of DHV in foundation of the ditch in the original Carrousel to permited specially the company EIMCO to invent again with its patent in the United States Carrousel 2000 system see the figure , realizes the livi
10、ng creature of the higher request takes off the nitrogen with divided by the function of .There has been in the world up to now more than 850 Carrousels oxidize the ditch with the Carrousel 2000 system are circulating3. From diagram therefore, the Carrousel oxidizes the ditch the usage the spirit of
11、 that definite direction control with shake up the device, face to mix with the liquid deliver the level speed, from but make drive the liquid of admixture that shake up is in oxidize ditch shut match outlet circulate flow.Therefore oxidize the ditch have the special hydraulics flows the , current c
12、omplete mix with the characteristics of the type reactor, have the characteristics that push the flow type reactor again, the ditch inside exsits obviously of deliquescence oxygen density steps degree.Oxidizing the ditch cross section is rectangle or trapezoids, the flat surface shape is many for ov
13、al, the ditch internal water is deep general for 2.5 4.5 m , the breadth is deep compare for 2:1, also have the deep water amount to 7 ms of, ditch inside average speed in water current is 0.3 ms/ s.Oxidize ditch spirit admixture equipments contain surface spirit machine, the spirit of turn to brush
14、 or turn the dish and shoot to flow the spirit machine, pipe type spirit machine with promote take care of type spirit machine etc., match with in recent years usage still contain underwater push machine46. 图1 Carrousel 2000系统平面结构图3. The Carrousel oxidizes the mechanism of the ditch 3.1 The Carrouse
15、l oxidizes the ditch handles dirty and aqueous principle The at the beginning common Carrousel oxidizes the dirty water in inside in craft of the ditch direct with dirty mire in reflux together enter oxidize the ditch system.The surface spirit machine makes fuse in the liquid of admixture the densit
16、y of the oxygen DO increases about 2 the 3 mgs/ L.Under this kind of well the term of the oxygen , the microorganism gets the enough deliquescence oxygen comes and go to divided by the BOD;At the same time, the ammonia were too oxidized nitrate with second nitrate, this time, mix with the liquid be
17、placed in the oxygen appearance.In the spirit machine downstream, after water current be become by the swift flow appearance of the spirit District of even flow the appearance, the water current maintains in the minimum current velocity, guaranteeing the live and dirty mire be placed in the floats t
18、he appearance. average current velocity0.3 ms/ sOxidize microbially the process consumed to fuse the oxygen in the water, until the value of DO declines for zero, mixing with the liquid report the anoxia appearance.Versa nitric that turn the function through anoxia area, mix with the liquid enter to
19、 have the oxygen area, completing once circulating.That system inside, the BOD declines the solution is a continuous process, the nitric turns the function to turn with the versa nitric the function take place in same pond.Because of structural restrict, this kind of oxidize the ditch although can t
20、hen valid whereabouts BOD, divided by the phosphorus take off the nitrogenous ability limited7. For the sake of the acquisition better divided by the phosphorus take off the nitrogenous result, Carrousel 2000 systems increased a oxygen District before common Carrousel oxidize ditch with the unique o
21、xygen area. call again that the versa nitric in front turns the areaThe dirty mire in all refluxes enters the anaerobic District with 10-30% dirty water, can under the anoxia with 10-30% carbon source term complete remaining of dirty mire in reflux inside nitric acid nitrogen to versa nitric to turn
22、, creates for the unique oxygen pond of hereafter unique oxygen term.At the same time, anaerobic District inside of concurrently the sex germs convert the dissolubility BOD VFA, the germ acquire the VFA its assimilation PHB, the energy source needed solves in the phosphoric water and cause phosphati
23、c releasing.The anaerobic District a water enters the inner part installs the unique oxygen area that have the mixer, the so-called unique oxygen is a pond inside to mix with liquid since have no the numerator oxygen, also have no the compound oxygen nitric acid root, the here unique oxygen environm
24、ent is next,70-90% dirty water can provide the enough carbon source, can make the germ of released the phosphorus well.The unique oxygen area connects behind the common Carrousel oxidizes the ditch system, further completing to do away with the BOD and take off the nitrogen with divided by the phosp
25、horus .Finally, mix with the liquid transfer the dirty mire inside in oxidize ditch enrich oxygen area eject, while enriching the oxygen environment germ surfeit, phosphorus from the water, ejecting the system with the dirty mire in surplus.Like this, in Carrousel 2000 systems, than completed to do
26、away with the BOD, COD with take off at the same time goodly the nitrogen divided by the phosphorus Synthesizing and dirty water in the river City , long sand City decontamination centers of the dirty the factory of water in the first in Kunming of adoption that crafts handles the movement result of
27、 the factory therefore:Through Carrousel 2000 system after handling, the BOD, COD, SS does away with the rate to all come to a 90% above, the TN does away with the rate comes to a 80%, the TP does away with the rate to also come to a 90%. 3.2 The Carrousel oxidizes the ditch divideds by the phosphor
28、us takes off the nitrogenous influence factor. Affecting the Carrousel oxidizes the ditch divideds by the phosphoric factor is dirty mire , nitrate density and quality densities primarily.The research expresses, being total and dirty mire as 11% that a hour biggest phosphorus 4% with deal is its fuc
29、k dirty mire deal within live and dirty mire, keep for the the germ physical endowment measures, but when dirty mire over 15 d hour dirty mire the inside is biggest to contain the obvious descent in deal in phosphorus , canning not reach the biggest divideding by the result of phosphorus on the cont
30、rary.Therefore, prolong persistently the dirty mire for example 20ds,25ds,30ds is to have no necessary, proper choose to use within the scope of 815 d.At the same time, high nitrate density with low quality density disadvantage in divided by the process of phosphorus Affecting the Carrousel oxidizes
31、 the ditch takes off the nitrogenous and main factor is DO, nitrate density and carbon source densities.The research expresses, oxidizing the ditch inside exsits deliquescence oxygen density steps degree namely the good oxygen area DO attains 33.5 mgs/ L, the anoxia area DO attains 00.5 mgs/ L is a
32、prior condition to take place nitric turn reaction and versa nitrics turn the reaction.At the same time, ample carbon source and higher C/ the N ratio benefits to take off to complete nitrogenously7. 4. The Carrousel oxidizes problem and solution methods of the ditch esse. Though the Carrousel oxidi
33、zes the ditch has a water fluid matter good, the anti- pounds at the burthen ability strong, divided by the phosphorus take off the nitrogen efficiency. But, in physically of movement process, still exsits a series of problem. 4.1 Dirty mire inflation problem When discard the aquatic carbohydrate mo
34、re, the N, P contains the unbalance of deal, the pH value is low, oxidizing the dirty mire in inside in ditch carries high, fuse the oxygen density the shortage, line up the mire not etc. causes easily dirty mire in germ in form in silk inflation;Not the dirty mire in germ in form in silk inflation
35、takes place primarily at the waste water water temperature is lower but the dirty mire carries higher hour.The microbial burthen is high, the germs absorbed the large quantity nourishment material, is low because of the temperature, metabolism the speed is slower, accumulating the rises large quanti
36、ty is high to glue sexual and many sugar materials, making the surface of the live and dirty mire adhere to the water to increase consumedly, SVI the value is very high, becoming the dirty mire inflation. Cause that aim at the dirty mire inflation, can adopt the different counterplan:From the anoxia
37、, water temperature high result in of, can enlargement tolerance or lower into the water measures to alleviate burthen, or the adequacy lowers the MLSS control dirty mire reflux measure, making need the oxygen measures decrease;If the dirty mire carries high, can increase MLSS, to adjust the burthen
38、, necessity the hour can stop into the water, stuffy a period of time;Can pass the hurl add the nitrogen fertilizer, phosphorus fatty, adjust the admixture nourishment in the liquid material equilibrium BOD5:N:P100:5:1;The value of pH over low, can throw to add the lime regulate;Bleach the powder wi
39、th the liquid chlorin press to fuck 0.3% of the dirty mire0.6% the hurl adds, can repress the silk form germ breed, controling the dirty mire in combinative water inflation11. 4.2 Foam problem Because entering to take the grease of large quantity in the water, handling system cant completely and ava
40、ilably its obviation, parts of greases enriches to gather in in the dirty mire, through turn to brush the oxygen agitation, creation large quantity foam;The mire is partial to long, the dirty mire is aging, and also easy creation foam.Spray to pour the water or divided by with the surface the of do
41、away with the foam, in common use divided by the an organism oil, kerosene, the oil of silicon, throw deal as 0.51.5 mgs/ L.Pass to increase dirty mire in pond in spirit in density or adequacies let up the tolerance of , also can control the foam creation effectively.When contain the live material i
42、n surface in the waste water more, separate with the foam easily and in advance method or other methods do away with.Also can consider to increase to establish a set of divideding by the oil device moreover.But enhance most importantly the headwaters manage, reducing to contain the oil over the high
43、 waste water and other poisonous waste water of into12. 4.3 Float the problem on the dirty mire When contain in the waste water the oil measures big, whole system mire quality become light, cant like to control very much in operate process its at two sink the pond stop over time, resulting in the an
44、oxia easily, producing the corrupt and dirty mire ascend to float;When spirit time over long, take place in pond the high degree nitric turn the function, making nitrate density high, at two sink the versa nitric in easy occurrence in pond turn the function, creation nitrogen spirit, make dirty mire
45、 ascend float;Moreover, contain the oil in the waste water? Take place the dirty mire ascend after floating should pause enter water, broke off or dirty mire in clearance, judge the clear reason, adjust the operation.The dirty mire sinks to decline the sex bad, can throw to add of oagulate or sloth
46、materials, the improvement precipitates the sex;Such as enter the water carries big let up into the water measures or the enlargement reflux measures;Such as the dirty mire grain small lower the spirit machine turn soon;If discovers versa nitric turning, should let up the tolerance , enlarge the ref
47、lux or row the mire measures;If discover the dirty mire is corrupt, should enlargement tolerance, the clearance accumulates the mire, and try the ameliorative pond internal water dint term12. 4.4 Current velocity is not all and the dirty mire sinks to accumulate the problem In Carrousel oxidize ditc
48、h, for acquiring its special admixture with handles result, mix with liquid must with certain current velocity is in ditch circulate flow.Think generally, the lowest current velocity should should attain for an average current velocity for, doing not take place sinking accumulating 0.30.5 ms/ s.The
49、spirit equipments that oxidize the ditch is general to turn to brush for the spirit of to turn the dish with the spirit of , turning to brush of immerse to have no depth for 250300 mms, turn the dish immerse to have no depth for 480530 mms.With oxidize the ditch water the deep3.03.6 ms comparing, turn to brush occupied the deep 1/10 in water 1/12, turned the dish to also occupy the 1/6
