Los Angeles daily herald., 1890-03-09

OF these three collecting points proposed
each to be 220x22Ox10 feet in size, and
holding about 8 ,000, 900 gallons each the
aggregate capacity would be 5000, ,OOt
gallons, or sufficient for about six-dsys
sewage output.
At convenient points lime water (nili
of lime) at the rate of 10 solid grains o
lime per gallon Of sewage would be intro
duced some distance above the inlet tt
the basin under treatment, until 1t II
filed; then allow the solids to subslde
and when this is done, say in eight tt
twelve hours, draw off the supernatan
water for irrigating purposes, using the
second or alternate tank meanwhile, thus
changing from one to the other continu
ously.
THE LIME PROCESS
Has been applied to sewage upon an ex
tensive scale at Tottenham, England. In
the ninth report of the medical officer OF
the Privy Council it is stated that at Lie
cester, England, the elaborate outfall
works succeed in their object of purify
ing the river from nuisance. The river
used to be very foul. Now, With far
more sewage discharged, there is only q
little discoloration just at the outlet. The
process consists in the mixture with the
sewage of certain proportion of the
milk of lime, after which a copious de-
posit of highly putrescible mud takes
place, aehile the supernatant liquid ttoaos
off IN comparatively clear, though some
what milky condition. Prof. Way found
that from ten to sixteen grains of Stacked
lime per gallon of sewage was sufficient
to precipitate ordinary sewage"
Instead of trying to treat the small
quantity of solid matter which costs
more than it is worth, and is constantly
cited as costing large sums to dry, COM
press and get rid of, we have no especial
need of treating it, and thus avoid ex-
pensive plants and treatment. We want
the fluid portion instead, which carries
most of the value and worth to us as an
irrigating water, as we get most of the
fertilizers as we'll. Then sluice out the
precipitated sludge through modified
outlet to the ocean, thus getting rid OF II
nearly without handling, and at a nomi'
nal expense.
The solid matter will average, by esti.
mates from good authorities, about 71a
ounces per head every twenty-four hours
which, for population of so, 900, would
be about 81 500 pounds, or some $3.50
gallons, and daily, say, 100000 gallons
drawn from the supernatant water of the
adjoining tank would sweep the sludge
cleanly to the sea every twenty-four
hours. By an intermittent treatment OF
this nature there is no doubt but wha,
this whole subject would be easy of solu
| tion and practically successful. The SO.
- ~f 20 lx,x xxr,,l1 h< To
on hydraulic principles, by gravitation
so nearly automatically arranged that
ONE ATTENDANT
Would simply tend the supply and
delivery gates, and command at will any
OF the requisites in the operation, to- wit
First-Direct the raw sewage into
either tank desired to fill.
Second-Turn on any quantity in any
direction required of the partly purified
sewage for irrigation.
Third-In case of any arrangement
the ocean outlet stands ready to dispose
of all or any part of the volume of sew
age.
Fourth-A trial could be made by the
city OF small works of this nature after
the sea outlet was made to fully test itt
merits before building large and com.
plete works, SO there would be little risk
Now, let US see what this plant wouls
cost: +
Three basins at 5000. .$24.OO(
Pipes and appurtenances, etc. ......... 21, ,OO(
Total cost Observation-Disclosures. .$45, ,ooC
Expenses, per cent. on $45, 900. ..-$ 5000
Six men to run works ks................. 4,3SC
Ten barrels lime per day, $3.50 pounds
at 81. observation-disclosures. $3.50
Incidentals Observation-Disclosures. 2,OOC
This sum would amount to about II
cents per head per year. The sewags
treated would be sufficiently purified foi
use.
The route selected for the Ballona ses
outlet is about the poorest one, 30 far al
ground is concerned, that could be found
and how any sensible or practical con
struction could be made on that route
located as it is through boggy marsh
reported in places eighteen feat deep tc
bottom, and length wise of the marsh al
that, is beyond comprehension. VIII
the owners of the Cienega ranch-Bald
win & Co.-allow that great
CIENEGA TO BE DRAINED
and "the water run into the creek" al
stated in the engineers report? Other
good and suitable ground is available
and there is no question that if ths
swamp route is selected, untold and un
foreseen construction difficulties and sx
pense will be encountered. A limited
space along the Southern Pacific railway
after leaving room for the track and safe
distance, will have to be followed over s
long distance of boggy, swampy ground
and little room will be left to operate
upon in the construction. Hard ground
can be found on which to construct this
work for most of the distance, and /,
only requires average engineering iudg.
ment to select it. 1t is also manifestly
for the best interest of the city to con.
denim or buy and own its own right o
way to the sea, over the best gradient
ground that can be selected, 80 as here
after to have no entangling alliances
with any railroad right of way or other.
wise.
1t is more than likely that the tax.
payers OF this city can get all of this
work done in good, substantial, work
maD-like manner, suitable for presen
purposes, and from ten to twenty years
additional, for not to exceed sever
hundred thousand dollars. The figures
for this basis are plain to thinking
minds.
APPROXIMATE ESTIMATES.
15fs pips Of 1Ineal psst peT rota
ws..orn d,v,s,on inches ~ feet foot o,s cost
western division 5650 59650 @l ~ 50 $51'5ae 5ae