Wauwatosa news. [volume] (Wauwatosa, Wis.) 1900-1948, 1901-02-16
SEWERAGE SYSTEM.
W anwatosa's Proposed Sewerage system
Officially Approved by the state
Board of Health.

the state Board of Health. In order 10
complv with the law, the plans of the
sewerage system and disposal works
for f',= eitv Of Waawatosa were sub
mitt~i 10 the Board and the following
IS their report
STATE OF WISCONSIN,
Office Of the State Board
of Health, 204 Biddle ST.
MILWAUKEE. Wis, Feb. Q, 1901.
HON. T.. d. HOYT, Mayor,
Wauwatosa, Wis.
DEAR SIR
In compliance with your request we
have to state, that on the 9th day of
February, 1901, together with your en-
gineer, Mr.. John w. Alvord, we ex-
amined the plans and specifications
proposed for the sewage disposal plan
of Wauwatosa.
1t appears on estimation that not far
from 5000 gallons per day of sewage
is flowing into the sewers of Wauwa-
tosa to be disposed of by this plant:
that the pumpage at the Water Works
Station in the winter time is about
10000 gallons per day, and in the sum
mer time from $1,000 to 100000 gallons
per day. about one-half of which
reaches the sewers. 1t is intended to
establish "A plant in a proper location
in the city of Wauwatosa with a pre-
sent capacity of $4,000 gallons per day
SO arranged that its capacity can be
easily increased to 100000 gallons per
day, and ultimately to 500, 900 gallons
per day The plan proposed is that of
septic tanks, followed by aeration, and
bacterial publication in primary con
tact bed, followed by intermittent
filtration on prepared sand beds at
high rate of flow.
The plan proposed for the city of
Wauwatosa is to consist of a septic
tank, covered by brick building and
galvanized iron roof. The tank is to
be constructed of concrete. and will be
about so feet long, II feet wide, at
water line and feet deep. 1t is to be
divided into 5 tanks by wooden parti-
tions, and by an arrangement Of wood
en- troughs and gates. The sewage
may be made to pass through the tank
with any rest period desired from the
full capacity and full flow of 10 hours
rest down to one-third of this rest for
/ fun flow, or 10 hours rest for one-third
flow All ordinations between these
extremes can be met by changing the
com bination of troughs and tanks. 1t
| is well known that every sewage has
1 its own rest period due to its strength,
! temperature, and quantity This
variation has often reached the ex-
| treme limits of from 20 minutes in the
case Of very stale sewage, much
diluted, to SO hours for very strong
sewage. The tanks proposed are to be
SO built that the shorter interval may
be accomplished if necessary, and it is
hardly to be expected that the longer
interval win be required. The middle
partitions are Of wood, and it is ex
pected they will be changed when the
tank is enlarged at some future time
The sewage is to be brought to the
septic tank in submerged sewer
which practically forms part Of th'
septic tank itself just before tn,
sewage enters the tank it passe
through grit chamber, from whicl
She heavier matters may be fiushe,
from time To time onto the sand filte
bed No, /, where, after drying, it ma
be removed and buried.
In the septic tanks, if properly mar
aged the organic matter in suspensio
in the sewage will be reduced to waite
in solution, and IN part is resolved I
primary gases, Nosludge is left Th
solid matters are disintegrated 10y tn
= action Of auerobie bacteria. 1t mu;
be observed that if the rest period
too great these bacteria create toxj
which may injure their vitality an
the rest period must be shortened. an
on the other hand n too short a re,
period viii not properly reduce II
J. suspended matter and interfere wit
the working of the primary bed. Tn
process requires intelligent and caref,
. management, and much of the sucee
d of the process depends upon such il
, telhgent operation.
n After passing through the sept
u tank the reduced sewage passes into
n wide open carrier, holding cnoug
n. sewage when fun to fiji one prima,
n contact bed adjacent This carrier
H. filled with large Jumps OF cinder. whic
;" win aerate after oach discharge an
n,ss nNvCa., into tbn .N,ro~, -,