To increase the plant’s energy efficiency flow velocity should be measured in order to calculate (mass) flow rate.
Supply pipe leading to the aeration basins or in every ventilation pipe towards the basins
Low m³/h up to higher than 10,000 m³/h depending on the measuring point and pipeline
Pipelines from DN 32 and smaller up to DN 1000 and larger
Usually 0.4 – 0.6 bar overpressure
Normally in non explosive areas as outdoor installations or in the plant’s engineering room
Many municipal sewage plants apply the activated sludge process where sludge aeration air is being pumped into aeration basins, speeding up the degradation process.
Large compressors ensure sufficient sludge aeration air in the basins which requires a lot of energy. Generating sludge aeration air makes up the majority of the sewage plant‘s electricity requirement causing a significant power requirement in the municipality and therefore it has the greatest potential for energy saving.
The demand for sludge areation air depends on the level of pollution and the amount of water in the aeration basins. Said demand can be regulated by measuring the actual flow rate. The measurement increases the plant’s energy efficiency in combination with a corresponding compressor control.
Safe, fast measurement under all weather conditions
Installation via ½“ bushing optionally with a ball valve
Two analog outputs 4-20 mA for flow rate/mass flow/flow velocity and temperature as well as a digital output as the limit value or counter
Thermal flow sensor TA10
Thermal flow sensor TADi