Document a4XgoN2b2ZDzkrpop8GqMw3rY
CHEMICALS INDUSTRIES
/INTEROFFICE LAKE CHARLES
TO FROM
W. L. Oglesby M. G. Carver.i
DATE SUBJECT
Dec. 13, 1983 BAT Metals Removal
Attached are the results of experimentation recently completed to determine the feasibility of including 014 with Plant B effluents as a source of sodium hydroxide for metals removal. In summary, the results indicate a reduction in operating costs could be realized. It is also noted that complete removal of TSS in 014 could be achieved if necessary (based on jar tests). Earlier jar tests with Outfall 014 showed 50-70% reduction in TSS. Upon mixing with Plant B effluents, the removal efficiency has been increased to 80-99% removal.
The outfalls were mixed based on the following flow rates!
WTU1 - 775 (gpm) SFD2 - 110 VDC3 - 62 014 - 1500
1 WTU - Waste Treatment Unit effluent 2 SFD - Sodium Formate Dest. effluent 3 VDC - VDC reactor bottoms aq. effluent
The chlorine bearing streams were dechlorinated and mixed accordingly. The .amount of NaOH required to reach pH 10.5 (optimum for metals removal) was determined before and after the addition of 014.
Also attached are the data from the most recently completed jar test verification study. Please include these data with 12-6-83 memo.
MGC/ce
Attachments
cc: R. L. Holliday S. P. Andree G. L. Whitaker H. J. Hoenes W. H. Cooper M. W. Wood
SL 078054
Pit B
Pits A 6 B
Sample Date VDC WTU SFD 014 Mixed
Mixed
12-05-83
12.7
<1
7.7 12.1 1.0
2.2
12-06-83 12.7 1.1 7.6 12.3 1.1
7.6
12-07-83
12.4
<1
8.5 12.1 1.0
2.3
12-09-83 12.7 1.3 8.4 12.1 1.3
9.2
12-09-83
12.7
<1
8.4 12.2 1.3
9.7
% Reduction in OH"
Requirement
60
79
65
78
73
SL 078055
DATE SAMPLES COLLECTED -
Initial pH
Free Chlorine (mg/L)
VDC 12.5
WTU
< 0.0/
o.v\
SFD
ns014
32 0^
t ( H7-
Na:Ss03 (mg/I.)
aja
A%A
Combined pH
))
1 (rliA r-z
j
Treatment
Control NaOH NaOH (filtered) Ca(OH)i Ca(OH)2 (filtered)
TREATMENT OF VDC, WTU AND SFD
Settled . Sludge % % Fe
Metals Cone (ppm) Cu Ni
Cr
TSS (ppm)
-< I
27 AM ao AJ A
|.12-
1,32-
M 0,8f
0<U O.cf as*!
0.2|
O.lo
o.u 0.\1
asAO? D.02-
$03
-=!
-c. 1
</
<L 1
OH-Precipieating Agent
50% NaOH
10% Ca(OH)2
TSS During Flocculation (ppm)
LoV-
Volume Used to Reach pH 10.5
50 4^4/7SOr* L
^<9.
/nyo^
SL 078056
- I- S"3 ' Oe^k '
TREATMENT OF 014, SFD, KTU, AMD VDC
Treatment
014 Control Mixed Control NaOH NaOH (filtered) Ca(OH)^ Ca(0H)2 (filtered)
Settled
Sludge /J V6
<a
Metals Cone (ppm)
F e Cu MEL
3^ 3.S
Cr
an>
^1
1^7
tvA
0,t)l
0.%\
\M
o,u 0-U
o. of 0.63(2-12 0.2a 0-22 O-Dl
Nk 0.?4 0A1 0.2f <0.01
TSS (ppm)
(s8S
<~f
<U
OH-Precipitaring Agent
50% NaOH
10% Ca(OH)2
TSS During
------------F--l-o--c- cul-a--t-i-o--n-- f
n 11.
Volume Used to Reach pH 10.5 l' 3*X/ 2 $~<J>
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SL 078057