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2. The continuous and effectual liquifaction of the
sludge contained in the sewage is ensured.
3. Complete freedom from any nuisance exists.
4. The process is continuous and requires no mechanism
for working alternating apparatus or valves.
5. Large and costly tanks are not necessary.
The material used mainly consists of granulated clinkers
from the refuse destructor.
I would urge the Council, in considering any scheme for
improving the Farm, to bear in mind the great advantage of one
that effectually does away with any trouble from sludge. This is
always a great nuisance and source of unpleasant smell.
By a system of bacteriological beds the sewage is treated as a
whole, and the solids reduced to a liquid form.
So far as I can see there should be no difficulty in forming a
sufficient number of beds at the Farm to treat a much larger
volume of sewage than we are likely to have 10 deal with for a
long time to come. Precipitation tanks and the use of chemicals
could then be dispensed with, and the former made into filter
beds.
During the year slaughter-houses, dairies, cow-sheds, milkshops.,
&c, have been inspected periodically, and reports furnished
to the Council. These buildings are now all registered.
The water supply has been submitted quarterly to the Clinical
Research Association for chemical and bacteriological examination,
and each time a very satisfactory analysis has been made. In one
or two instances I have submitted secretions in doubtful cases of
infectious sickness to the Association for examination, with considerable
advantage in forming an accurate diagnosis.
Many new houses (114) have been erected, the drainage of
which has been carefully tested, and any nuisances observed or
reported dealt with as they have arisen.
Appended are the statistics of deaths during the year, and of
population, births, and new cases of infectious diseases, classified
according to disease and ages; and also a report from the
Sanitary Inspector of work carried out by him.
Mr. Hopwood has rendered me very effectual assistance in
carrying out my duties, and I have to thank the Council for their
ready assistance and support.
I am, Gentlemen,
Yours very faithfully,
GEO. HY. BUTLER,
Medical Officer of Health.
Wealdstone,
10th March, 1899.