Description

The sewage treatment system is a treatment system that removes or converts the main pollutants in urban sewage and industrial sewage into harmless substances through physical, chemical or biological treatment methods, so as to meet the relevant sewage discharge standards.

Sewage treatment system consists of filtration, primary settling, aeration tank, secondary settling, disinfection and other processes. Among them, the role of the aeration tank is to make the mixed liquid get enough dissolved oxygen under the action of aeration, so that the activated sludge can fully contact with the sewage, so that the soluble organic pollutants in the sewage are adsorbed by the activated sludge and survive The microbial groups on the activated sludge are decomposed to achieve the effect of purifying sewage. Therefore, the detection of the relevant physical and chemical properties of the aeration tank directly determines the final sewage treatment effect.

Sewage aeration process

1.Sewage flow measurement

The sewage treatment plant introduces the sewage into the aeration tank, and adopts the activated sludge method to purify the introduced sewage and discharge it to the secondary sedimentation tank. The sewage contains a large amount of chemical contaminants, which have high requirements on the corrosion resistance, measurement accuracy and service life of the flowmeter. GAIMC electromagnetic flowmeter has the advantages of high precision, multiple electrodes and optional lining. It provides professional selection recommendations for sewage of different water quality, suitable for a variety of sewage flow measurement.

Electromagnetic flow meter

› More suitable for raw water measurement

›Diameter ：DN10~DN2200

› High-precision measurement： ±0.5%

› Forward and reverse flow measurement

› Multiple output communication: 4-20mA, pulse output, RS485

› Multiple power supply modes: 220VAC / 24VDC / lithium battery

2.Air flow measurement

In the aeration tank, compressed air needs to be filled to increase the oxygen content in the tank, so that the microorganisms in the aeration tank can survive better. Therefore, the amount of compressed air needs to be controlled. Using GAIMC vortex flowmeter, you can accurately measure the flow of compressed air to achieve the control of the gas consumption of the aeration tank.

Vortex flow meter

› Wide measuring diameter：DN15~DN1800

› Multiple installation methods: clamping, flange, insertion, etc.

› Multiple explosion-proof: intrinsically safe, flameproof

› Multiple output communication: 4-20mA, pulse output, RS485

› Multiple power supply modes: 220VAC / 24VDC / lithium battery

3.Water quality measurement

    The aeration tank mainly absorbs and decomposes pollutants by aerobic activated sludge microorganisms, so as to achieve the function of purifying sewage. Only by reasonably controlling the pH, temperature, dissolved oxygen content, etc. of the aeration tank can the aerobic activated sludge microbial activity be maximized and the sewage treatment effect be improved.

  pH controller

› Multiple electrodes for different working conditions

› Simultaneous measurement and display of pH / OPR and temperature

› Isolated transmission output, more stable signal

       ›Manual/automatic temperature compensation for more accurate measurement

› High and low alarm function

› IP54 protection

Dissolved oxygen meter

›Polarography / Fluorescence

›Simultaneous measurement and display of oxygen content / oxygen partial pressure / oxygen saturation and temperature

›Isolated transmission output, more stable signal

       ›Manual/automatic temperature compensation for more accurate measurement

›High and low alarm function

›Zero Oxygen & Full Scale Calibration