analysis of a pilot-scale anaerobic baffled reactor treating domestic ...
analysis of a pilot-scale anaerobic baffled reactor treating domestic ...
analysis of a pilot-scale anaerobic baffled reactor treating domestic ...
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METTHODS<br />
OFF<br />
SAMPLINNG<br />
AND ANNALYSIS<br />
This project spannned<br />
five yeaars<br />
<strong>of</strong> experiimentation.<br />
During D this ttime,<br />
many ppeople<br />
were involved inn<br />
samppling<br />
and anaalysis,<br />
and a nnumber<br />
<strong>of</strong> diifferent<br />
techn niques were used.<br />
1 S<br />
SAMPLING<br />
Sampples<br />
<strong>of</strong> inlet aand<br />
outlet cooncentrationss<br />
were obtain ned from thee<br />
feed splitterr<br />
box and the<br />
outlet pipee<br />
just bbefore<br />
treatedd<br />
effluent waas<br />
dischargedd<br />
back to the e wastewaterr<br />
channel. Duuring<br />
experim mentation att<br />
Umbiilo<br />
WWTP, samples were<br />
obtained from the sam mple valves supplied onn<br />
the side <strong>of</strong> f the <strong>reactor</strong>. .<br />
The iinitial<br />
100 mmℓ<br />
drawn froom<br />
each valvve<br />
was discarded<br />
and thhe<br />
subsequennt<br />
volume collected<br />
andd<br />
storedd<br />
for analysiis.<br />
The rrelative<br />
amouunts<br />
<strong>of</strong> sludgge<br />
and liquidd<br />
in each com mpartment wwere<br />
measureed<br />
using a sa ampling stickk<br />
or coore<br />
sampler (Figure A2.<br />
1). This coonsisted<br />
<strong>of</strong> a Perspex tuube<br />
with a 50<br />
mm intern nal diameter, ,<br />
calibrrated<br />
for height<br />
in metrees,<br />
and fitted with a rubber<br />
bung attached<br />
to a steeel<br />
rod. The rubber bungg<br />
and rrod<br />
was looseened<br />
from thhe<br />
outer tubee<br />
and dropped<br />
into the ABBR<br />
via the 775<br />
mm port on o the top <strong>of</strong>f<br />
the coompartment<br />
to be samplled.<br />
The Perspex<br />
rod wa as then droppped<br />
over the steel rod to o land on thee<br />
bung,<br />
capturing a core sampple<br />
that would<br />
be withdr rawn from tthe<br />
<strong>reactor</strong>. IInitial<br />
sludge<br />
and liquidd<br />
levelss<br />
were recordded.<br />
A 5 minn<br />
settling timme<br />
was allowe ed before setttled<br />
sludge llevels<br />
were measured. m<br />
Figurre<br />
A2. 1: CCore<br />
Sampleer<br />
filled withh<br />
compartm ment 1 sludgge<br />
(left) and compartme ent 8 sludgee<br />
aand<br />
supernattant<br />
(right)<br />
Durinng<br />
the Kingssburgh<br />
experrimentation,<br />
ssamples<br />
<strong>of</strong> compartment<br />
c<br />
contents weere<br />
not obtain ned from thee<br />
valvees<br />
on the sidee<br />
<strong>of</strong> the reacctor<br />
as it wass<br />
believed th hat conditionss<br />
near the wall<br />
<strong>of</strong> the rea actor did nott<br />
represent<br />
bulk coonditions.<br />
Coompartment<br />
samples wer re obtained uusing<br />
the corre<br />
sampler. Once O sludgee<br />
levelss<br />
had been reecorded,<br />
the core sampler<br />
was balanc ced in a buckket<br />
and the buung<br />
worked loose so thatt<br />
the core<br />
sample flushed out into the buccket.<br />
Bucket t contents wwere<br />
vigoroussly<br />
stirred an nd a samplee<br />
withddrawn<br />
for stoorage<br />
and anaalysis.<br />
185<br />
APPEN NDIX A22
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