Jet-Loop System Technical Paper

8/19/2019 Jet-Loop System Technical Paper

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JET-LOOP SYSTEM ©®

A NEW ENERGY EFFICIENT AND NEAR ZERO SLUDGE EXCESS

PRODUCTION FOR AEROBIC WASTEWATER TREATMENT USING

ATMOSPHERIC OXYGEN DRIVEN TO THE EFFLUENT BY EJECTOR(S)

Ferreira, António M.C.M., , Lda – Headquarters: %&"! , Portugal

E!Mail:

ABSTARCT

T5e Je-L!!" S#$e%©® a99lies or aeroi/ ;aste;ater treatent using e as

t5e e/5ani/al s4ste or aeration.

T5e e are installed outside and ao8e t5e eluent, and t5e air as9irated at t5e air

inlet is /ondu/ted ;it5 t5e eluent in /ir/ulation to t5e otto o t5e aeration iorea/tor, 4 a drat tue.

T5e design and engineering o t5e e is unique, sin/e it is ale to introdu/e air

against a de9t o liquid not less t5an $,& , and at t5e sae tie, ?ee9s t5e 8olue o

as9irated air and t5e /onsu9tion o energ4 et;een liits t5at turn t5e s4ste t5e ost

ei/ient in o14gen transer to t5e eluent and t5e one aong all ot5er 9ro/esses t5ats9ent less energ4 in t5e aeration 9ro/ess.

T5e Je-L!!" S#$e%©® doesn@t 9rodu/e an4 signii/ant aount o e1/ess sludge

=ML>, sin/e it /oines toget5er t5ree inno8ati8e eatures:

-ne! T5e e 9assing in t5e e


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T5e Je-L!!" S#$e%D is ;ell ada9ted or t5e treatent o 8er4 5ig5 /5arged organi/

loads, as industrial iodegradale eluents, as ;ell as less /ontainated eluents, as in

uni/i9al ;aste;ater treatent. It /an e installed in an4 sie ro sall /ounities,u9 to t5e iggest /ities, de9ending onl4 in t5e sie o t5e iorea/tor=s> all toget5er ;it5

t5e nuer o e t5at dri8en t5e eluentt5ro; t5e e.

&EYWORDS:

C- =C5ei/al -14gen eand>G 0- = 0iologi/al -14gen eand>G + l a =gloal

/oei/ient or o14gen ass transer>G-T)= tandard -14gen Transer )ate>G-=issol8ed -14gen>.

INTRODUCTION'

T5e Je-L!!" S#$e%D is a ne; and re8olutionar4 9ro/ess or iologi/al ;aste;ater

treatent, in using atos95eri/ o14gen as sour/e or o1idation o t5e ra; organi/ loads,

dri8en to t5e eluents 4 e


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t5e eeding to t5e /entriugal 9u9=s> t5at dri8es t5e eluent t5roug5 t5e e. Fig

(.

T5e e dis/5arge t5roug5 a drat tue to t5e otto o t5e iorea/tor, and at t5is 9oint t5e air is released, lo;ing u9 reel4, due to t5e dieren/e o gra8it4.

Fig. (. ET!L--P TEM D si9liied 9ro/ess diagra.

DISCUSSION'

In t5e Je-L!!" S#$e%D T5e organi/ /5arged eluents , C-=C5ei/al -14gen

eand> , and 0-& = 0io/5ei/al -14gen eand> are 5ig5l4 o1idied 4atos95eri/ o14gen, ;it/5 is diused into t5e eluent in an en5an/ed ;a4 as a

/onsequen/e o t5ree a


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! T5ree: t5e 5ig5 8olue o air introdu/ed into t5e eluents /reates an 5oldu9 o gas

greater t5an ost o t5e ?no;n /ases using ot5er ors o aeration.

As /onsequen/e o t5ese o9erational and inno8ati8e design, t5e Je-L!!" S#$e%D isale to 9eror in 5ig5er - /on/entrations t5an an4 ot5er s4ste ;it5out t5e need or

an4 e1/e9tional /onsu9tion o energ4#-14gen. In t5e Je-L!!" S#$e%D /ase, ;e5a8e oser8ed in soe industrial ull o9erational 9lants 9eranent le8els o - et;een

'&!&&B o t5e a1iu saturation le8el. T5ose le8els ;ere otained in ull s/aleo9eration, ;it5 /onsistent deli8er o ($,&! %, 2 Air to t5e eluents, 9er +;5 energ4

s9ent in t5e 9u9s used or dri8ing t5e eluents to t5e e,

t5eJe-L!!" S#$e%D 9eroran/e ;as 8eriied in ters o t5e -T) and +la. T5eoser8ed and easured 8alues ;ere otained in real 5ig5 /5arged industrial eluents,

;it5 /on/entrations in C- u9 to ($. g # L.

T5e tests ;ere ade in ield, ;it5 one - sensor easuring t5e - as 9er/entage o t5esaturation le8el.

T5e easured te9erature o t5e eluent ;ere %' C and t5e estiated salinit4 o t5e

eluent ;ere set as & 9arts 9er t5ousand. T5e aroetri/ 9ressure ;ere assued as $"

Hg. At t5is /onditions, t5e saturation dissol8ed o14gen in ;ater is 3,( g#L.

T5e +la or t5e Je-L!!" S#$e%D ;as deterined /onsidering t5e i/roorganissu9ta?e o o14gen:

dC

dt = Kla Cs−C −rM

5ere +la is t5e o8erall o14gen diusion transer /oei/ient to t5e liquid, Cs is t5e

dissol8ed o14gen saturation /on/entration, and rM is t5e rate o o14gen /onsued 4 t5ei/roorganiss.

To deterine t5e rM = )ate o -14gen used 4 t5e i/roorganiss> ;e s5ould use t5e

arurg laorator4 a99aratus and ?no; e1a/tl4 t5e ML* /on/entration. As


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alternati8e, ;e easured t5e /onsu9tion o o14gen in t5e 9ro/ess = ig. %> , as un/tion

o t5e tie.

Fig. %: issol8ed -14gen =-> in t5e Je-L!!" S#$e%D as un/tion o tie, or total asen/e o

aeration. T5e easureents ;ere 9erored 4 INETI, at ois Portos ;aste;ater installation, during et!%&.

in/e t5e redu/tion o - oser8ed ;as /onstant and equal to %,6" g#L -%, in %

seg., rM is equal to (%3 g -%#da4.L

T5e aeration o t5e 9ro/ess, ro B -, or a rea/tor ;it5 " 2 8olue, ;it5 onee


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T5e easureents, indi/ate a ass transer o o14gen to t5e eluent o %,33

g-%#L.in, or ($%,3 g-%#L.H. T5us, t5e total -14gen transerred to t5e s4ste, ;as:

($%,31 ". O (,2"3 +g -%#H.

T5e a8erage ass o o14gen 9er 2 o air is ,%& +g. Considering t5e air introdu/ed int5e liquid, t5e total -14gen su99lied to t5e liquid ;as "&1%&O(",%& +g.

Fro t5is /al/ulation, ;e /an deterine t5e -T) = tandard -14gen Transer )ate>

and t5e -TE = tandard -14gen transer ei/ien/4> or t5e eluent. in/e t5e s4ste

;ere o9erated 4 one e loose t5eir /a9a/it4 and ei/ien/4 ao8e t5e 9ressures o ,& ar.

T5e Je-L!!" S#$e%©® introdu/es an inno8ati8e and unique a99roa/5 to t5eliitations oser8ed in t5e e1isting aeration s4stes.

As a /onsequen/e o t5e inno8ati8e 9ro/ess de8elo9ed, t5e result ro t5e 5old!u9 o air

into t5e eluent, toget5er ;it5 t5e 9ere/t i1ing o t5e e1treel4 sall i/ro ules

o air ;it5 t5e liquid, /reates t5e ost ee/ti8e and t5e 5ig5est diusion /oei/ient oo14gen into t5e ;ater until no; ?no;n or 9ro/esses using atos95eri/ o14gen.

As /onsequen/e o t5e 5ig5 -T) t5e Je-L!!" S#$e% D, /an o9erate ;it5 a great

energ4 e/ono4. in/e t5e a.


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T5e 8alues or t5e +la = loal Coei/ient or -14gen ass transer> ;ere /al/ulated in

a//ordan/e to t5e e19eriental 8alues.

T5e et5odolog4 a99lied ollo; t5e guidelines ro Met/al Q Edd4 or linear 9lot ot5e dissol8ed o14gen /on/entration 8ersus t5e tie.

T5e 8alues used or t5e /al/ulation ;ere t5ose ro tale (:

Tale (: -ser8ed 8alues or t5e - /on/entration in t5e aerated eluent as un/tion o tie.

(C$-C) %O*L T+%e ( $e)

",$$ ((6

",'$ (2(

",( ('$

&,& (&&

And 9lotted in sei!logarit s/ale or otaining a linear /orrelation, as:

+laO %,22 1=log ",$$!log &,&&>#=(&&!((6> =(> O ,&& seg!( O ,22 in!(

T5e Je-L!!" S#$e%D as een a99lied to t5e se/ondar4 ;aste;ater treatent o

doesti/ and industrial eluents. -ne o t5e /ases o a99li/ation is resued elo;:

Tale %: et!Loo9 4ste D a99li/ation to oesti/ R Industrial eluents.

P,,%ee I."/ O/"/

C- =C5ei/al -14gen eand> g#L ($ %%& (%

0-&= 0iologi/al -14gen

eand>g#L

6'&2 '

T = Total us9ended olids>g#L %(%3 2&

PH = orensen s/ale> ' $

T5e Je-L!!" S#$e%©® eets t5e liits in ;aste;ater 9araeters standards or

Euro9ean Snion. requireents. It is t5us 8er4 ee/ti8e in uni/i9al ;aste;ater

treatent as also in industrial 5ig5 loaded ;aste;ater.

ue to t5is 5ig5 - /on/entrations, t5e s4ste 5andles 9ere/tl4 ;it5 *-C ;it/5usuall4 are released 4 ;aste;ater eluents, li?e aonia and H%, o1idiing t5ose

/o9onents strongl4 and liiting is eissions elo; insignii/ant le8els. T5is ad8antage

is adequate or eliination o odors in t5e ;aste;ater treatent 9lants and t5e nearsurroundings.

Tale 2: et!Loo9 4ste D -9erational ain 9araeters.


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Parameter

HRT ( Hydraulic Retention Time) H 6-7

C! "#eci$ic in#ut ( %& C!' m3d) 3-25

'* ( eed' *+, ratio) %&'%& 0.8- 4.2

C! e$$iciency reduction ( /) 97

-ne 8er4 i9ortant ad8antage introdu/ed 4 t5e Je-L!!" S#$e% is t5e a/t t5at it;or?s a//ording to t5e 9rin/i9le o NEA) JE)- ECE LSEK

as a/tuall4 se8en ull s/ale 9lants installed ;it5 t5e Je-L!!" S#$e%a99lied to industrial and doesti/ eluents.

In all o t5ose 9lants, soe o9erating at ore t5an t5ree 4ears, t5e e1/ess sludge oser8ed

is 9ra/ti/all4 near ero. In 9arti/ular, as een onitoring /losel4 installation o9eration %&. 9lant,

.T5e lo; or ero e1/ess sludge is a /onsequen/e o t5e inno8ation introdu/ed in t5e

e and as a e/5anis or destru/tion o ioass. T5is is a/5ie8ed in t5e

se/tion o t5e noles o t5e e


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– T5e aeration equi9ent and s4ste is unique and doule or tri9le t5e usual design

9araeters: -T) and -TE are ore t5an doule t5e est e1isting s4stes.

– T5e Installation is ast, si9le and saller t5an an4 ot5er e1isting s4ste.

– T5e aintenan/e o t5e Je-L!!" S#$e% is 9ra/ti/all4 ine1istent, sin/e in all t5es4ste, t5e e/5ani/al an o8ing 9arts are resued to t5e /entriugal 9u9s. All t5eot5er /o9onents and equi9ents o t5e s4ste are stati/, t5us ;it5 inial or none

aintenan/e.

T5e Je-L!!" S#$e%D /an e /ou9le ;it5 eit5er 9er/olating ilters or ;aterdis/5arge requireents, or ;it5 ultrailtration eranes or total ;ater re/laation and

reuse. In t5is /ase, t5e ;ater qualit4 /an eet t5e regulator4 9araeters or use in

agri/ultural irrigation, industr4, et/.

Fig ': T5e et!Loo9 4ste /oniguration or ediu uni/i9al ;aste;ater treatent. 0iorea/tor

diensions: iaeterO (',$ G HO 3,& , *O (2$ 2. ail4 treated ;aste;ater:'&!& 2#da4.

Po9ulation ser8ed: %. – 2. 5aitants /it4. i1 e


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T5e et!Loo9 4ste is

T5e s4ste ;as de8elo9 ro (66" and /ontinuou

i9ro8ed to t5e a/tual state o t5e art.

AC&NOWLEDGMENTS0

T5e de8elo9ent o t5e s4ste ;as ade 9ossile due to t5e inan/ial su99ort

a/5ie8ed 4 t5e &t5 EC )esear/5 Frae;or? Progra, and t5e LIFE 6".

T5e /ollaoration on t5e earlier resear/5 ro INETI = National Institute or Engineeringand Industrial Te/5nolog4> ;as also a great /ontriution to t5e et!loo9 4ste.

All t5e Portuguese Industrial /o9anies t5at ro t5e eginning did sele/t t5is

te/5nolog4 or t5e treatent o t5eir eluents, elie8ing on t5e ad8antages o t5e s4ste.

The JET-LOOP SYSTEM received several National and international awards such as the "Prémio Nacional de Ambiente" - 2006 and the nomination for European Environmental 10 best environme

solutions in 2006.

.

REFERENCES'

=(> !Met/al Q Edd4., aste;ater Engineering. M/gra;!Hill International.

.C.0loor, .C. Anderson Q A. );ille4 = (66&> Hig5 )ate Aeroi/ Treatent o0re;er4 aste;ater Ssing t5e et Loo9 )ea/tor. Wat Res., =&> : (%($!(%%2.

VALORSABIO! Is a Leading En8ironental )esear/5 Engineering Co9an4 in Euro9e, ;ere

5a8e een /ondu/ting su//essul resear/5 9ro

Documents

Jet-Loop System Technical Paper