August AT-10, Manual

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WASTEWATER TREATMENT
PLANT MODEL AT6 - AT50
Typical AT series wastewater treatment units of AUGUST IR KO JSC are supplied in a single contain -
er, comprising: anaerobic-anoxic zones (1), aeration zone (2) and secondary settler (3). The anaero -
bic-anoxic zone is divided by partitions into the descending and ascending flow sections (1a, 1b, 1c
and 1d), creating the so-called “vertical flow maze”. The secondary settler (3) is equipped with a flow
regulator protecting the Unit against the negative effects of peak flows.
Mechanical equipment consists of the solids bag (integrated in a domestic sewage treatment plant),
a blower, an air distribution manifold with valves, airlifts 1, 2, 3 and aeration elements.
Solids bag
The solids bag is used for separation of gross solids from wastewater (biodegradable, soluble solids
(paper, kitchen waste, etc.)). Only non-degradable materials (textiles, wood, bone, etc.) remain in
the solids bag, and must be removed later. The solids bag is lifted by pulling the handle, and cleaned.
Air distribution panel and adjustment valves
A-valve
Controls air volume to airlift 1 (internal recirculation). Large bubbles mix the contents of section 1a;
whirling should be visible on the water surface.
The valve is partially opened.
B-valve
Controls air flow to the current regulator (3). Normally, it is set to release one bubble for control of
the automatic flow controller approximately once in 1-2 seconds.
The valve is minimally opened (approx. 2.5 turns).
C-valve
Controls the air volume to airlift 2 – the return of recirculating sludge from the secondary settler par -
tially into the third compartment of the non-aerated chamber and partially into the aeration cham -
ber (oxygen), with the ratio changed from 4:1 to 1:1. This can be done by turning the elbow to a
• TREATMENT PROCESS
• MECHANICAL AND ELECTRICAL DEVICES
Air supply to airlifts 1, 2 and 3 and to the current
regulator and aeration elements is adjustable by
means of valves A, B, C, D and E located on the air
distribution manifold.
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example