MANUAL OR AUTOMATIC COLUMN FILTER WITH MICROFILTRATION UNIT
HOW IT WORKS
Wastewater from car washes is first collected from a screening system and then transported by gravity to a lifting tank. Later a submersible pump, specific for waste water carrying high concentration of suspended solids, draws the water out from the tank and moves it to the filtration system. This last consists in a column of granular activated carbons whose diameter is 550 mm and whose height is 1600 mm. Activated carbons adsorb pollutants from water, particularly surfactants and oily substances. Activated carbons have small and low-volume pores that increase the surface area available for adsorption. Due to the high degree of microporosity, activated carbons suit the purpose of removing organic compounds from effluents.
Activated carbons efficiency is stated by the so called activate carbon saturation curve. The gradually loss of adsorptive capacity from activated carbons depends on the kind of wastewater treated. Back-washings by clean water are periodically required in order to both blend the carbons contained in the filter and remove the impurities that have been retained from them.
The back-washing water will be collected into a settling tank.
To optimize the quality of the effluent, a further treatment is available through a micro-filtration unit previously arranged above the filter, that works due to some replaceable coalescing cartridges. After the treatment, the contaminants-free water is sent to the inspection chamber located outside the area, then reaches the public sewerage system by gravity.
A branch arranged above the inspection chamber inlet enables the extraction of effluent samples required for chemico-physical analysis finalized at rating the treatment performance.
Maintenance operations will be periodically executed on the basis of the kind of waste water subjected to the treatment. The maintenance operations will be arranged and scheduled after the plant start-up.
- Filter back-washing
- Coalescing cartridges replacement
REQUIRED CONSTRUCTION WORKS
The construction works required for the plant installation are on the Customer charge:
- Primary oil separation and desludging tank (optional)
- Sewage receiving and lifting tank
- Basement (including outlets for both treated water and back-washing one)
- Connections to the public sewer system
HOW IT WORKS
The wastewater is first collected in a lifting tank and later is drawn out and moved to the filtration system from a submersible pump, specific for waste water containing high level of suspended solids. The filtration system consists in a column of granular activated carbons or quartzite whose diameter is 550 mms and whose height is 1600 mms. Activated carbons adsorb pollutants from water, particularly surfactants and oily substances. Activated carbons have small and low-volume pores that increase the surface area available for adsorption. Due to the high degree of microporosity, activated carbons suit the purpose of removing organic compounds from effluents. High purity quartzite, by its side, retains impurities like slit and suspended solids. It is arranged in several layers according to the different coarseness degree. Back-washings by clean water are periodically required in order to both blend the adsorptive minerals in the filter and wash the impurities off them.
The back-washing water will be sent to upstream of the plant.
An additional filtration unit arranged above the main filter executes extra filtration through some replaceable coalescing cartridges.
After the treatment, the water is sent to the inspection chamber.
The plant is fully equipped with any electromechanical facilities required to work automatically (compressor, solenoid valves, pressure transducers, feed pump, floats, programmable logic controller PLC display panel).
- Activated carbons/quartzite filtration
- Microfiltration through cartridge filter cloth
- Microfiltration through coalescing cartridge
- Mechanical workshops wastewater
- First flush rainwater treatment for factories and recycling areas
- Wastewater refinement
- Car wash