The Bridgeport evening farmer. [volume] (Bridgeport, Conn.) 1866-1917, 1917-11-20
GREaEsNwIcH DISPOSAL PLANT.
work on Grass Island That Cost
t. ez About $4,000
stamford Advocate)

The sewage disposal plant, on
Grass island, which has been in pro-
cess Of construction for something
over a year, is practically completed,
and, to all intents and purposes, is
about ready now for the reception
and treatment Of its first fow of sew
age.
The visitor to Grass Island will
see nothing above ground as he APP
proaches the plant to indicate that
there has been something like $4,000
worth of work and material laid.
out there The only thing that sticks
up is the pumphouse, a small but
well designed brick building; but on
arriving at the center Of the island
he will get, from a cursory glance,
partially adequate idea Of what
4 has been accomplished since the
construction work began. in August,
1915.
The sewage disposal process oper-
ated at this plant is known as the
Inhofr settling-tanks process The
actual plant occupies space LAG
feet 8 inches by so feet inches,
and consists Of a concrete structure
OF those dimensions, extending to the
depth Of % feet, divided into ten
main compartments, or tanks" each
so feet long and IL feet wide, inside
measurements, separated by concrete
walls two feet thick. Each tank
lis divided into practically two levels
the floor of the upper part convergtng
at an angle from either side and
leaving an opening of about inches
in the center. through which the
sewage drops into the lower chamber.
Each lower chamber is divided into
four separate compartments On
each slAs Of each tank is a '..gas vent"
which carries off the light, gases,
while the obnoxious gases are re-
tanned in the bottom chamber, or
1"decomposing tank" and prevented
from rising by a scum that forms
ION the top of the sewage.
as The. sewage enters the plant
through a large main pipe, and enters
consecutively, the different tanks, ac-
: cording to the quantity being deliver
ed by the pipe. The sewage is de-
stroyed and disposed of through nat
ural psychological and chemical
processes. without treatment of any
kind 1t simply settles and evap-
crates, leaving but small percent
age of residue, which is pumped out
of decomposition, the liquid portion
goes of. through separate channel,
to the pump house, where it is sub
5ected to chlorine treatment for
publication. and discharged into the
Sound : The solids known as "slude,'
are pumped onto the drying BEDS
through which they are filtered and
the substance remaining above board
is removed and utilized as fertilizer
In the Grass Island plant there is
about 1000 cubic yards of concrete
masonry. 1t extends to depth of
about 16 feet below the surface level
of the island
The. drying beds, where the resi-
due is disposed of, are 40 feet square.
There are two of these.
The pump house contains practic-
ally all the machinery required by
tAe plant-the powerful pump, with
O. capacity of about 900 gallons a
minute which will extract the
'sludae," as required; the electric
motor. registering device, chlorine
applying apparatus, ETC.
There will be no superstructure to
the plant. 1t remains open the year
round, and will require the services
of only on man to attend it when it
IS in operation. To the question,
whether there would not be an often
sive effluvia from the plant, Mr..
Shepherd replied there would be alb
solutely no oder to indicate the pre-
ence of sewage in thu process of, de-
composition.
1t is expected that it will be in
active operation before the first of
January.