The DeLand weekly news. [volume] (DeLand, Fla.) 1887-190?, 1906-05-04
The Bacterial Puriii-
cation Or Sewage


Scientific American IN the septic
tank system II sewage disposal.
Tbi. i the system recommended
by our civ Board IT Health amt
j. the plan which will probably
b. adopted If the citizens vote ia
favor Il s-Nagr system for the
cIty al the forthcoming city rl,c-
tIun.
+ The modern mrthud Of Ultra
tion i not a mechanical nur a
rh,miral ON. thrsy systems hay"
lreu tried. huJ have failed g. dis
i-,.r uf th, laru quantities of lm-
pur.tIc- lu -ulutIuu. IL system
Il lrcakluE az animal and v"gc-
ian.- matter 100" their harmless
ruu,tituaut parts D., means at the
action hacteria which uhahlt thr
-.Uage. II l. really pr'rv,s
f rumhustI"n or nNIdatIou. that
ID. e. say. the converting ct ur-
saulr Substances into Inorganic.
The sam kind of action J. seen
frrJuutly o. uatur" II taxi
placr 900 conversion e foliage
into dried up dead leaves and IA
all prucrs-,, 4 decay The har-
t,rlal -eEag. treatment system l.
simply the adaptation II thu
method 1T uatu-. o. the require.
mont, OF man.
Before che "a understand how
II i, possible, tor -uch ticatluu
to IT, accomplished. two thiu-.
must O.. realil-d Tn 'ir-t i tie
enormous iurrr Il hact,r.a pre-.
Int tn. second = thu u-lgur'I-
rant hulh 10 sewage that regulr
pur,rratluu. \, many a. H..
sp.tssI bacteria have .eeu count
ed IN .ur -ramu. - "uuc"l u'
Ill from lr.uc. along which
-cvag had hceu running They
mu.t.p.N VT. Mira rdluarv rap
iiity and we're tier, uu turc,- 90
Interfere. uu. hart-rIum would
nav, .INt,,l aud a hall m.ll.a
defendants 100 tW,uty-inUr hour.
Ordinary -eNa=. on the "ta.r
hand. uu.N contains one part 100 %
thousand f dad ur-aul. mat.r.
80 parts ar, pure 0aNrT and ur,
part harm.r-. mineral matter.
In l~.'i Donald Cam rua. ..
Exeter. Eas.ard. brought tie
septic tank into Vr,m..-ur..
Thu 'nu- - ii a large 'auk, 20
which ,.Va-, al..N.. e. re-
man. VaeT' Z a.. acted .f.. tl
Aua,r"bic hacteria m,rro-urEau.
III, thai ...v without Al >vua-
.u.ta.. r..,.G--ahlr 'n.t.
% ibid matt.r .l -.-lr.u-.u.. by
mean. 30 aaacruhir action pay ui
J., be-um.. ..qgiti-d and gee .t'
,u.ut.ru. part us 20 tn t.p A.
.,um. while part dcr,ud- Z. ill.,
tutt"m a. -.udEe Tie MET AID
uut.,i g tn tank are placed Nr.
luV o.. ,Urtac.. 80 that th, -eUa-,
mak IA, quietly through Slth -
litt., rumm'tInu a. ls'-- .hlc. The
-,Um which r.-'- L. the top h,.-
rumr- uNldlLed after a time and
pa--e, uil into ia, air a. HARM
.'-s las. \ rHTtalu amount {
decomposition take p.arr 100 tIr
~ludgr az the bottom. When
tank are larg- -.uds arrumu-
.at-s very slowly 90 th, butlum.
At a >rptir tank at Mansfield.
Ohio, only ieW lurhe- # deposit
Were drawn oii after 10 had ha-'n
ia us.' ior a wear and a half
The -rptIr tank has proved
most useful factor "a sewage pur-
Iiicat lOn. IL Is u-.d extensively
a. preliminary treatment for cpn
tact beds aud Prcolating filters.
Ii canu"t. however, lie cnn-id-red
by itself a. n system If puriiica-
ton. IL can he USED successfully
only A. part ot one.
Perhaps the most practical
method Of -ewag.' disposal j. the
combination 4 tn septic tank
aud the contact bed. The con-
tart bad system Vas devised 10y
". j. Dibdin. who installed the
famous bed ~ tn town of sutton.
England H. this system -rWage
j. tirst passed through a screen.
% prevent the floating particles
from blocking the interstices Of
the bed. IL 10 then pa-s-d over
a coarse-grained bacteria bed.
This consists II n tank three fect
deep filed with broken .i"n,.
coke. burnt ballast. or sum- other
suitable material not more than
three inches in diameter. IL il
supplied With under.drain-. -
that IL can IT, easily emptied.
Tie sewage IL allowed 10 enter
the ted until the level Of the til
teTing material l. reached. The
inlet l. then closed. and the sew-
age il allowed o. remain standing
L 49,