Depuración de aguas residuales (manual en inglés)

38 Dig a hole of appropriate dimensions and line a 10 cm thick sand layer at the bottom, grain size 0-5 mm, dampen the sand and level it. Lay the plant down. Fill the tank with clean water after having connected the tanks hydraulically and proceed with dampened sand filling of the gaps around them. Finish with a 5 cm thick light con- Rain water treatment plant treats water coming from paved surfaces. It removes pollutants and allows the water to be discharged to final desti- nation as per specified law standards.After instal- lation check that all electro-mechanical devices work properly (pump, floater and panel) at least once a year. Remove inert material from storage crete casting (or with a 25 cm thick reinforced concrete slab in case of car passage on top of the plant ). Make sure that covers are always inspec- tionable. Connect pump to the electrical panel. If the water table is superficial, a concrete water- tight chamber has to be built all around. tank at least once a year. Check floating material in the oil trap every two months and clean it when necessary. Control the oil-absorbent filter every two months and change the internal mate- rial when exaust. Backwash is necessary once a week if a pressurised filter is used instead. cm 10 cm 10 cm 10 cm 10 light concrete sand earth INSTALLER ENGINEER (SPECIFICATIONS) USER FLOW PARTITIONER chamber OIL TRAP OIL-ABSORBENT FILTER INSPECTION CHAMBER PUMP FLOATER RAIN WATER STORAGE TANK RAIN WATER TREATMENT, CONSISTING OF THE FOLLOWING PHASES: FLOW PARTITIONER - , which is meant to separate the first 15 minutes of rain water from the rest,which does not need to be treated and must be collec- ted to the final discharge through a by-pass pipe. STORAGE TANKwhere the first rainwater arrives and where inert material settles and floating material floats. Water is stopped in this tank for 24-48 hours.At the bottom of the tank a pump is installed,power of about 0,3 kW,220 Volts.This pump is in charge for water feeding to the following phase. STATIC OIL TRAP , where the physical separation takes place. Floating material is stored in the central basin. FINAL FILTER where emulsion oil is removed from the flow. A gravity filter with oil-absorbent material inside, or a pressurised filter with sand and activated carbon, especially if metals are present in traces. Fibreglass flow partitioner for rain water Flow partitioner,made of fibreglass,with internal walls,to be used to receive water coming from surfaces up to 5000 m2, before discharging in sewage system, in order to prevent its failure. Excess water are discharged in terrain or in superficial water body, therefore this water must be as per law stan- dards.me al D. L.vo n° 152/99 . OPTIONAL I N S T A L L A T I O N I N S T R U C T I O N S a n n e x 1 inlet water to plant or sewer system excess rain water discharge www.baygar.com