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12
The method of treatment is as follows: —
The sewage, which enters the works by gravitation,
is first passed through a revolving screen, after which
a solution of Buxton lime equal to 4 grains per gallon is
added, and the whole is thoroughly mixed. It then
receives alumino-ferric to the extent of 1 grain per gallon,
and is again well mixed by passing over a salmon ladder;
and in this condition it flows into settling tanks, of
which there are five, four having a capacity of 70,000
gallons, and the fifth which will hold 92,000 gallons.
The overflow from the tanks first passes out of the
tanks into an open Channel, then into the first Contact
Bed, and through the filter or second Bacteria Beds into
an effluent chamber, and thence into the brook referred
to above.
The roads in this District have separate sewers for
storm water, and all houses, except the older ones, have
the dual system of drainage.
An endeavour is being made to carry the storm
water from the old houses into the surface water sewersi.
as opportunities occur.
This is very necessary as everything should be done
to make the flow of sewage at any sewage works as
uniform as possible.
The sewage from the Avenue and Ely Place section
of the District has to be pumped to the Sewage Works,
and in this case any rain water admitted to the sewers
greatly increases the cost of lifting the sewage to the
gravitation sewers.
Water Supply.
The Barnet Water Company now gives a constant
and good supply.
Dairies, Cowsheds and Milkshops.
A list of these will be found under the Scheme at
the end of the Report.
These have been constantly inspected, and suggestion
for the personal cleanliness of the milkers and
the grooming of the cows have again been urged.
A veterinary surgeon has not yet been appointed.
Four samples of milk were taken and found to comply
with the provisions of the Food and Drugs Act.