The stormwater treatment plant at the pharmaceutical company site
Industry
Type
Wastewater treatment
Task
To modernize the surface wastewater (Stormwater) treatment plant
Water source
Surface water (Stormwater)
About the project
The pharmaceutical company has the industrial site with a surface
wastewater catchment area of 27,1 ha. Collected surface wastewater is
generated by precipitation during the warm season and the snowmelt period.
The existing storage tank there modernized into a mechanical treatment
plant. The mechanical gratings and separating and dehydrating equipment
were installed. There was the process equipment modernized in the pumping
and filtering station.
The wastewater treatment plant consists of mechanical pre-treatment,
equalizer tank, and the wastewater treatment plant.
Plant performance by treatment stages
Mechanical pretreatment m3
/h 750-1550
Flotation m3
/h 2 x 60 = 120
Filtration m3
/h 4 x 25 = 100
Inlet water parameters
Surface wastewater
| Parameter | Unit | Value |
| Suspended Solids | mg/l | 24,7 |
| BOD5 | mg/l | 2,18 |
| Oil products | mgO2/l | 0,16 |
| Ammonium | mg/l | 1,17 |
| Iron | mg/l | 1,16 |
| Copper | mg/l | 0,10 |
| Zinc | mg/l | 0,02 |
| Chlorides | mg/l | 14,9 |
| Nitrite | mg/l | 0,11 |
| Nitrate | mg/l | 10,84 |
Treated water parameters
| Parameter | Unit | Value |
| Suspended Solids | mg/l | 5 |
| pH | 7-8 | |
| BOD5 | mgO2/l | 2,0 |
| Oil products | mg/l | 0,05 |
| Ammonium | mg/l | 0,5 |
| Iron | mg/l | 0,1 |
| Copper | mg/l | 0,06 |
| Zinc | mg/l | 0,01 |
| Chlorides | mg/l | 25,3 |
| Nitrite | mg/l | 0,01 |
| Nitrate | mg/l | 11 |
| Coliphages | <10 | |
| Coliform bacteria (in 100ml) | <500 |
Summarize
In this project after data evaluation was decided to install a rectangular dissolved air flotation unit (DAF). It was the first project where rectangular DAF was installed. The project implementation was smooth and successful.
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