Civil Engineering Reference
In-Depth Information
Table 16.5 Comparative chart of POU conventional UV and chemical treatment technologies (adapted from Hillie et al. , 2007b)
Contaminants removed
Amount of water treated
Ease of use
Useful life/
chem.
quant.
Labour
demands
Setup and
use
Technology type
Biological
Organic
Inorganic
Flow rate
Cost (US$)
Maintenance
UV lamps
￿ Bacteria
￿ Bact.
Spores
￿ Coliform
￿ Enteric
￿ Viruses
No
No
>
1 L/min
1 yr/bulb
$10-$100/yr
Unskilled
Easy
Regular
cleaning
Sodis
10 L/bottle
Indefi nite
$0.00
Regular bottle
cleaning
Synthetic
polymer
￿ Bacteria
￿ Coliform
￿ Fecal
Coliform
￿ Viruses
No
￿ Arsenic
￿ Asbestos
￿ Cadmium
￿ Chromium
￿ Selenium
n/a
V**
- Source
water
quality
> $100/yr/hh***
Unskilled
and
trained
Moderate
- Trained
person
must
determine
necc.
dosage
Chemical
storage
and
preparation
by trained
person
Alum and Iron
Salt
$10-$100/yr/hh
Moderate
- Powder
crushed
before
each use
n/a
Natural
polymer
< $10/yr/hh
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