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Packing wastewater Treatment Plants

Biological treatment
Biological treatment is based on biological reactor BC. This reactor incorporates all stages of the biological treatment, including the separation of the activated biological sludge. The separating settling tank is separating the excessive sludge. The internal structures split tanks into particular compartments enabling all functions of the biological treatment, i.e. biodegradation, nitrification, and denitrification. Internal circulation assures the function of the activated sludge circulation from the separation section.

The group wastewater treatment installations (type BC) are with the service range of 25 to 500 equivalent residents

The described arrangement of the compact biological reactor enables complex treatment of the municipal wastewater. High efficiency of the separation assures the function of the plant with high-activated sludge concentration. (4 – 6 kg SS / m3).

technological inside structure plastic tank

DESCRIPTION OF TREATMENT PROCESS

Inlet 
The wastewater flows to the denitrification section of the plant (DN).

Biological treatment
Mechanically pre-treated water (basket screen) flows into the denitrification zone of the reactor. The organic waste is used as a source of carbon for denitrification processes. Water from the denitrification zone in the activation/nitrification section where separation structures are fixed. Here the excessive sludge is separated from the purified water in the final settling tank. The clean water continues in the recipient. Airlift pumps assure the re-circulation between separation and denitrification zones.
All the sections of the reactor are connected in the closed circuit where activated sludge circulates. In the individual sections there are conditions with different concentration of the dissolved oxygen – a zone with stable oxygen deficit for denitrification and zones with variable oxygen deficit for secondary denitrification processes. The internal circulation serves in the same time for equable distribution of the separated suspension returned from the separation zone.

Sludge management
Production of the excess biological sludge is minimized using the low-loaded activation process. This way the complete simultaneous aerobic stabilization of the sludge is assured. (Sludge age is approximately 30 days.)

cover (wood or isolation)plastic shell extension or pump sump

GUARANTEED EFFLUENT PARAMETERS

Parameter Average Performance
BOD5 (mg/l) 20 – 25
COD (mg/l) 60 – 100
SS (mg/l) 25 – 30
N-N4 (mg/l) 2 – 5
total (mg/l) 5 – 8

Operation personnel 
One operator for 2-3 hour weekly will operate the plant, excepting periodical maintenance of the equipment. The operation will be described in details in the Operation Manual supplied with the plant.

liquid separator
liquid separator

ЛЕГЕНДА
DN – Denitrification; ACT – Activation; DОS – Clarifier (separation); NK – Basket screen; DM – Blower; 1.0 – Inlet; 1.1 – Connect DN-АСТ; 1.2 – INLET TO DOS; 1.3 – Recirculation; 1.4 – Outlet; 1.5 – Air system

Type Num. of
persons
Load BSK5
kg/day
Capacity
m3/day
Power
input
kW
Total
weight
kg
Мeazur-
ment
м
Num of
tanks
ks
Inlet
level
m
Outlet
level
m
BC 35 35 2.1 7 0.55 850 4×2.16×2.08 1 1.8 1.3
BC 50 50 3 10 0.55 1 000 4×2.16×2.58 1 2.3 1.7
BC 75 75 4.5 15 1.1 1 200 5×2.16×2.58 1 2.3 1.7
BC 100 100 6 20 1.5 1 500 6.5×2.16×2.58 1 2.3 1.7
BC 150 150 9 30 1.5 2 400 5×2.16×2.58 2 2.3 1.7
BC 200 200 12 40 3 3 000 6.5×2.13×2.58 2 2.3 1.7
BC 250 250 15 50 3 3 800 5.5×2.16×2.58 3 2.3 1.7
BC 300 300 18 60 3 4 000 6×2.16×2.58 3 2.3 1.7
BC 400 400 24 80 3 5 400 6×2.13×2.58 4 2.3 1.7
BC 500 500 30 100 4.4 8 000 6×2.16×2.58 6 2.3 1.7

liquid separatorliquid separator

TIME OF DELIVERY – 3-5 weeks after the date of order

WARRANTY
24 months after the date of commissioning, excepting the components where their manufacturer guarantees shorter period.