evt577 wastewater exp2 cod

8/18/2019 EVT577 Wastewater Exp2 COD

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89. The 4!s;s -!s *"!ce& on ! m!%ne'c s',,e, !n& -!s ,!*&"$

'',!'e& -'h 9.8 N e,,os !mmonm s"*h!'e 'o 'he 2,s' ,e&70,o-n

en&*on'.

) REACTOR DIGESTION (CLOSE REFLUX)

8. The COD ,e!c'o, -!s ',ne& on !n& -!s *,ehe!' 'o 869 ℃ . The

s!e'$ she"& -!s *"!ce& n ,on' o 'he ,e!c'o,.


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BLAN@ A (60.4−47.8 ) (0.052 ) X 8000

50mL BLAN@ B

(57.6−47.8 ) (0.052 ) X 800050mL

89?.> m%L 8.6? m%L

. REACTOR DIGESTION (CLOSE REFLUX)

BLAN@ 9 m%LSTANDARD 5= m%LSAMPLE 85> m%L

DISCUSSIONS

F,om 'he e#*e,men' o o*en ,e4# mos' '$*es o o,%!nc m!''e,

!,e o#&+e& 0$ ! 0o"n% m#',e o ch,omc !n& s",c !c&s. A s!m*"e s

,e4#e& n s',on%"$ !c& so"'on -'h ! ;no-n e#cess o *o'!ssm

&ch,om!'e (@


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CONCLUSIONS

The Chemc!" O#$%en Dem!n& (COD) h!s 0een &e'e,mne&. The

no,m!"'$ o FAS h!/e o0'!ne& 'o 0e 9.96< !n& ,om FAS 'he c!"c"!'on

o COD c!n m!;e 'o %e' 'he ,es"' o, 'he s!m*"e. F,om 'he c!"c"!'on o

o*en ,e4# me'ho& -e,e o0'!n 89?.> m%L o, 0"!n; A -h"e 8.6? m%Lo, 0"!n; B o COD /!"e. The s!m*"e -!s se 'he !mon' o o#$%en

(COD) consme& 'o com*"e'e"$ chemc!""$ o#&+e 'he o,%!nc -!'e,

cons''en's 'o no,%!nc en& *,o&c's. Fo, 'he ,e!c'o, &%es'on me'ho&

'he COD ,es"' o, 0"!n; s'!n&!,& !n& s!m*"e h!s 'o 0e 9 5= !n& 85>

m%L.

REFERENCES

8. ---.*!/"oschemc!"s.com"!0


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&e'e,mne 'he o,%!nc o#&+e !0"e m!''e,s con'en' o -!'e,

s!m*"es. h"e Bochemc!" O#$%en Dem!n& s ! common

en/,onmen'!" *,oce&,e o, &e'e,mnn% 'he e#'en' 'o -hch

o#$%en -'hn ! s!m*"e c!n s**o,' mc,o0!" "e.

-h"e BOD &esc,0es 'he 0o"o%c!" o#&!'on c!*!c'$ o !-!s'e-!'e, ' s no' ! me!s,e o 'he 'o'!" *o'en'!" o#&!'on

o 'he o,%!nc com*on&s *,esen' n 'he -!s'e-!'e,. A

nm0e, o chemc!" 'es's !,e se& 'o me!s,e 'hs *!,!me'e,

e'he, n 'e,ms o 'he o#$%en ,e,e& o, /,'!""$ com*"e'e

o#&!'on o, n 'e,ms o 'he e"emen' c!,0on. P,o0!0"$ 'he

mos' common 'es' o, es'm!'n% n&s',!" -!s'e-!'e,

s',en%'h s 'he Chemc!" O#$%en Dem!n& (COD) Tes'. Ths

'es' essen'!""$ me!s,es 'he chemc!" o#&!'on o 'he

-!s'e-!'e, 0$ ! s',on% o#&+n% !%en' n !n !c& so"'on. The /!"e o, 'he COD 'es' s !"-!$s %,e!'e, 'h!n 'he BOD 'es'

!n& s no' !"-!$s ! %oo& n&c!'on o BOD /!"es o, 'he s!me

-!s'e.

- Bec!se 'he COD 'es' o#&+es 0o'h 0o"o%c!""$ &e%,!&!0"e

!n& n0o&e%,!&!0"e o,%!nc m!'e,!"s 'he ene,%$ !/!"!0"e

o, 0o"o%c!" !c'on s s!""$ o/e,es'm!'e&. Ho-e/e, 'hs

&oes no' ,e&ce 'he se"ness o 'he 'es'. I ' s !ssme& 'h!''he ,!c'on o o,%!nc m!'e,!" 'h!' s no' o#&+e& n 'he COD

'es' ,em!ns cons'!n' 'hen !n$ ch!n%e n COD 0e'-een '-o

*on's n 'he *,ocess *,o/&es !n !ssessmen' (n 'e,ms o

o#$%en) o co,,es*on&n% ene,%$ ch!n%e. The ch!n%e n COD

'hen c!n 0e se& 'o es'!0"sh 'he ;ne'cs o ene,%$ con/e,son

n 'he *,ocess .e. 'he ene,%$ ,emo/!" c!n 0e &,ec'"$ "n;e&

'o 'he COD ch!n%e. B$ con',!s' BOD6 /!"es ,e,e !

co,,ec'on !c'o, 'o co,,es*on& 'he ene,%$ ch!n%es 0ec!se

'he 'es' /!"es &o no' ,e4ec' 'he 'o'!" o#$%en &em!n&.

;. W"< $"' COD=& #0' -''8& $+ /' 2+-%$+* ,+* $"' +00$'8

&*,#6' 9#$'* &6" #& %- 0#'& #-8 *%'*& #& 9'00 #& ,+*

9#&$' 9#$'*4

> In en/,onmen'!" 'he chemc!" o#$%en &em!n& (COD) 'es' s

common"$ se& 'o n&,ec'"$ me!s,e 'he !mon' o o,%!nc

com*on&s n -!'e,. Mos' !**"c!'ons o COD &e'e,mne 'he

!mon' o o,%!nc *o""'!n's on& n s,!ce -!'e, sch !s "!;es


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!n& ,/e,s m!;n% COD ! se" me!s,e o -!'e, !"'$. The

!mon' o o,%!nc m!''e, n 'he "!;e o, ,/e, -"" sho- 'he n&e#

o 'he -!'e, !"'$ !n& -e !"so c!n c!'e%o,+e -he'he, 'he "!;e

o, ,/e, e#',eme"$ *o""'e& o, no'.

evt577 wastewater exp2 cod

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