Rock Island Argus. (Rock Island, Ill.) 1893-1920, 1909-10-19

of the plant. The sedimentation basins
are not to be refined. but are to be
baffied with concrete walls so as to
produce proper fiexibility for coagulat-
ing purposes. These concrete battles
are the fixed type. The inf1uent and
effluent pipes are to be left as they
now exist but 80 inch connection, to
gether with a concrete fiume will con-
vey all water to the filters. The filters
themselves are to be adequately equip
ped with ample manifolds, cutters and
water wash system. There is hydraulic
Operation from a central table, record
ing loss of head gauges and other
complete equipment The filter flow
line is such that there is nearly six
vertical feet of the sedimentation
basin capacity available for fuctuation
should they be refined in the future,
or about three feet available at the
present limit.
The building offered by the Pitts
burg Filter Manufacturing company is
ample in floor space, being only equal
ed in this respect by the proposition
of the Norwood Engineering company
There is provision for office, labora-
tory, coagulating store, pump room
and mixing room. The machinery in
these rooms is complete and up-to-daCe,
except that no special arrangement
for the use of hypo-chloride have been
proposed The building does not en-
tirely cover the filters put double glass
inspection manholes are provided out
side.
AS a special feature of the Pittsburg
Filter company's proposition they sug
gest that they will remove the sand,
gravel and under drains from the old
filters so that two of them, including
the space under the plant as designed
can be used for additional clear water
storage to a depth of seven or eight
feet. giving about 100000 gallons al
ditional storage; the third basin can
be used for the storage of wash water
from the filters, so that this water may
be settled and pumped back to the
coagulating basin.
Il may be remarked in passing that
it is cheaper storage to clear out and
utilize these old filter basins for clear
water capacity than to refine and
waterproof the clear water reservoir
so that its water level may be raised.
The proposition of this company 10
use the third basin for wash water
settling is most valuable one, other
wise this wash water would pass down
through the sewers and the cost Of
pumping it up to the hill would he
lost. BY utilizingrthe third basin for
this purpose and repHmping the settled
water back to the coagulating basin Il
net annual saving of about 5000 or
$500 will be made. The Pittsburg
Filter Manufacturing company do not
include in their estimate centrifugal
pump for this purpose.
The proposition OF the Pittsburg Fill
ter Manufacturing company, including
battles in both sedimentation basins,
with sample table, is $63,700
They also make other minor prop0-
sitions for cheaper equipment which
we think are undesirable.
American Water Softcner Co.
The American Water Softener com
pany, Philadelphia, PATHS company
to locate its filter plant in old
filter plant No 4 inlpart with arrange
ments for extending TO the north when
necessary. The bid of the American
Water Softener company is quite diff
ferent from the other propositions re-
ceived in that it contemplates larger
number of filters than the other COM
panies propose. which are to operate
at much less head. This is is for the
purpose of securing the reserve capa-
city of the sedimentation basins.
Very close attention has been given
TO this bid as in some respects it pre-
sents decided advantages obtained
through economical adaptation. BY its
use three and one-third million gallons
present sedimentation basins to per-
nit of greater flexibility and economy |
N operation of the river pumping sta |
ion. This proposition is intended to |
accomplish by gravity flow by increas-
I'd first cost of filters what the New |
York Continental Jewel company pro- |
POSES to accomplish increased oper-
ating expense by pumping, but with |
his difference that the resulting EN- |
in adjusting the coagu- |
ating period are overcome by the New |
York Jewel company by special coag
1lation basins. The bid of the Ameri- |
AN Water Softener company, however.
S not excessive.
The proposition that this company
,ffers further is that it viii clear out
he old filter basins and will use them