knowingly污水处理英文文献英语

2021年1月20日发(作者：abramovi)

Oxidize the ditch craft in dirty water handle





of application and development

































CaiZhi
一
jun



(Foshan City Shunde District Environmental EngineeringBranch Foshan Guangdong 528000)

【
Abstract
】

Setanaerobic, naoxic section Carrous oxidation ditch with biologicla nitrogen and
phosphoru sremoval capabilitie, is curren dythe mainstream of city life process of sewage treatme
nt, This article descirbes the structure of Carrousel oxidation ditch, porcess and design problems d
uring the oper-ation and the corresponding solutions
．

【
Keywords
】
Carr ousel
；
Oxidationditch
；
Phosphorusnad nitrogenremoval
；
Structure
；
Mechanis m

1. Foreword
Oxidize the ditch( oxidation ditch) again a continuous circulation spirit pond( Continuous loop r
eactor), is a live and dirty mire method a kind of to ing the dirty water in ditch ha
ndles the craft be researched to manufacture by the hygiene engineering graduateschool of Hollan
d in the 50' in 1954 at Dutch throw in the usage for the velY first nme
.secause its a water fluid matter good, circulate the stability and manage convenience etc. techniqu
e characteristics, already at domestic and international and extensive application in live the dirty w
ater to is dirty to manage aquecustv with the industy[1].
Current application than oxidize extensively the ditch type include:The ( Pasveer) oxidizes the
ditch, the (Carrousel) oxidizes the ditch, ( Orbal) oxidizes the ditch, the type of T oxidizes the ditc
h( three ditch types oxidize the ditch), the type of DE oxidizes the ditch to turn to oxidize the ditch
with the Integral oxidize the ditch because of the difference of esse in construction wi
th circulating, therefore each characteristics[2].This text will introduce construction, mechanism, e
xistent 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 researched to manufacture by Dutch DHV company deve
lopment in 1967.0xidize the last the companyofDHVinfou ndationoftheditchin theoriginal Carrous
el to permited specially the company EIMCO to invent again with its patent in the United States C
arrousel 2000 system realizes the living creature of the higher request takes off the nitrogen with d
asbeen in the world up to now more than 850 Carrousels oxidize the
ditch with the Carrousel 2000 system are circulating From diagram therefore[3].
The Carrousel oxidizes the ditch the usage the spirit of that definite direction control with shak
e 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 nowrnererore oxidize the
ditch have the special hydraulics flows the ,current complete mix with the characteristics of the ty
pe reactor, have the characteristics that push the flow type reactor again, the ditch inside exsrts ob
viously of deliquescence oxygen density steps ing the ditch cross section is rectangl
e or trapezoids, the fiat surface shape is many for oval, 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 wate r amount to 7 ms of, ditc
h inside average speed in water current is 0.3 mS/ e ditch spirit admixture equipments cont
ain surface spirit machine, the spirit of turn to brush or turn the dish and shoot to flow the spirit m
achine, pipe type spirit machine with promote take care of type spirit machine etc., match with in r
ecent years usage still contain underwater push machine[4~6].

3. The Carrousel oxidizes the mechanism of the ditch

3.1 The Carrousel 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 di
rect with dirty mire In reflux together enteroxidize theditch surface spiritmachinemake
sfuse In the liquid of admixture the density of the oxygen DO increases about 2 the 3 mgsl
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 wi
th second nitrate, this time, mix with the liquid be placed in the oxygen the spirit ma
chine downstream, after water current be become by the swift flow appearance of the spirit Distric
t oP even flow the appearance, the water current maintainsin theminim umcurrentvelocity,guarante
eingthe liveand dirty mire be placed in the floats the appearance.( average current vercctvs-o.a msl
s)Oxldlze microbially the process consumed to fuse theoxygenin thewater,until thevalueofDOdecl
inesforzero, mixing with the liquid report the anoxia nitric that turn the function
through anoxia area, mix with the liquid enter to have the oxygen area, completing once circulatin
system inside, the BOD declines the solution is a continuous process, the nitric turns the fu
nction to turn with the versa nitric ~e function ta ke place in same e of structural restri
ct, this kind of oxidize the ditch although can then valid whereabouts BOD,divided by the phosph
orus take off the nitrogenous ability ltmrtedt
3.2 The Carrousel oxidizes the ditch divideds by the phosphorus takes off the nitrogenous inf
luence factor.
Affecting the Carrousel oxidizes the ditch divideds by the phosphoric factor is dirty mire, nitrat
e density and quality densities research expresses, being total and dirty mire as 11%
that a hour biggest phosphorus 4% with deal is its fuck dirty mire deal within live and dirty mire, k
eep for the the germ physical endowment measures, but when dirty mire over 15 d hour dirty mire
the Inside is biggesttocontain theobviousdescentindealIn phosphorus,canning not reach the biggest
divideding by the result of phosphorus on the ore, prolong persistently the dirty mi
re (for example 20ds,25ds,30ds) is to have no necessary, proper choose to use within the scope of
8~ 15 the same time, high nitrate density with low quality density disadvantage in divided by
the process of phosphorus .

4. The Carrousel oxidizes problem and solution methods of the ditch esse.
Though the Carrousel oxidizes the ditch has a water fluid matter good, the anti-pounds at the b
urthen ability strong, divided by the phosphorus take off the nitrogen efficiency. But, in physically
of movement process, still exstts a series of problem.
4.1 Dirty mire inflation problem
When discard the aquatic carbohydrate more, the N, P contains the unbalance of deal, the pH v
alue is low, oxidizing the dirty mire in inside in ditch carries high, fuse the oxygen density the shor
tage, line up the mire not etc. causes easily dirty mire ingerm in form in silk inflatlon;Not the dirty
mire in germ in form in silk inflation takes place primarily at the waste water water temperature is
lower but the dirty mire carries higher microbial burthen is high, the germs absorbed the
large quantity nourishment material, is low because of the temperature, metabolism the speed is sl
ower, accumulating the rises large quantity is high to glue sexual and many sugar materials, makin
g the surface of the live and dirty mire adhere to the water to increase consumedly, SVI the value i
s very high, becoming the dirty mire inflation.
Cause that aim at the dirty mire inflation, can adopt the different counterplan:From the anoxia,
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 n
eed the oxygen measures the dirty mirecarrieshigh, can increaseMLSS, toadjusttheburt
hen, necessity
4.2 Foam problem
Becauseentering totakethe greaseoflarge quantityinthewater, handling system can't completely
and availably 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 topourthewaterordivided bywiththesurfacetheof do aw
ay with the foam, in common use divided by the an organism oil, kerosene, the oil of stncon, thro
w deal as 0.5~ 1.5 mgsl to increase dirty mire in pond in spirit in density or adequacies let
up the tolerance of ,also can control the foam creation contain the live materia! i
n surface in the waste water more, separate with the foam easily and in advance method or other m
ethods do away can consider to increase to establish a set of dlvideding by the oil device
enhance most importantly the headwaters manage, reducing to contain the oil over t
he high waste water and other poisonous waste water of into[llJ.
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
, can't like to control very much in operate process its at two sink the pond stop over time, resultin
g in the anoxia easily, producing the corrupt and dirty mire ascend to float;When spirit time over l
ong, 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 di
rty mire ascend f1oat;Moreover, contain the oil in the waste water?
Take place thedirtymire ascendafterfloating should pauseenter water, broke off or dirty mire in
clearance, judge the clear reason, adjust the dirty mire sinks to decline the sex bad,
can throw to add of oagulate or sloth materials, the improvement precipitates the sex;Suchas entert
he watercarries big let upintothe water measures or the enlargement reflux as the di
rty mire grain small lower the spirit machine turn discovers versanitricturning,shouldletup
thetolerance,enlarge the reflux or row the mire measures;1f discover the dirty mire is corrupt, shou
ld enlargement tolerance, the clearance accumulates the mire, and try the ameliorative pond intern
al water dint term!':
4.4 Current velocity is not all and the dirty mire sinks to accumulate the problem
In Carrousel oxidize ditch, for acquiring its special admixture with handles result, mix with liq
uid must with certain current velocity is in ditch circulate generally, the lowest current
velocity should should attain for an average current velocity for, doing not take place sinking accc