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| # Filter pit unit ## Compact units

Treatment > Filter pit unit
Description The biological filter pit septic tank (decanter/digester) system is suitable for domestic-type waste-water. The system meets current Spanish regulations on dumping "Reglamento del Dominio público Hidráulico" [Regulation of the public water domain], Royal Decree 849/1986. The filter pit units are sized for an intake of 200 l/p.e. and day with a 24-hour retention time. Performance figures for this treatment system are as follows: - BOD5 REDUCTION 80% - SS REDUCTION 90%
MATERIAL -Fibreglass-reinforced polyester. -Polypropylene manholes. CHARACTERISTICS -High chemical and mechanical resistance. -High corrosion-resistance. -High weather-resistance. MAINTENANCE -Remove 3/4 of the accumulated sludge once a year. OPERATION -DECANTER: Performs primary sedimentation. -DIGESTOR: Clarifier. -BIOFILTER: biological breakdown of organic matter.
Available models
Popul. | Vol. (L) | Ø (mm.) | L (mm.) | H (mm.) | Pipe (mm.)
4 | 1.500 | 1.100 | 1.600 | 1.200 | 110
7 | 2.000 | 1.100 | 2.150 | 1.200 | 110
12 | 3.500 | 1.100 | 3.700 | 1.200 | 110
15 | 4.000 | 1.500 | 2.750 | 1.600 | 125
20 | 6.000 | 1.725 | 3.000 | 1.825 | 125
30 | 9.000 | 2.000 | 3.280 | 2.100 | 125
40 | 12.000 | 2.000 | 4.300 | 2.100 | 125
50 | 15.000 | 2.500 | 3.560 | 2.100 | 160
60 | 18.000 | 2.500 | 4.170 | 2.100 | 160
75 | 22.500 | 2.500 | 5.100 | 2.600 | 200
100 | 31.500 | 2.500 | 6.900 | 2.600 | 200
125 | 37.500 | 2.500 | 8.150 | 2.600 | 200
150 | 45.000 | 2.500 | 9.670 | 2.600 | 200
175 | 52.500 | 2.500 | 11.200 | 2.600 | 200
200 | 60.000 | 2.500 | 12.730 | 2.600 | 200
Consult us for other volumes
Operating Details The waste water entering the treatment plant passes first through the septic tank (decanter/digester) which performs the primary sedimentation and digests the sludge, where the anaerobic bacteria degrade the organic matter, breaking down the solids. The clear water passes through the biofilter by way of pipes that distribute the clear water onto the filtering material, where the aerobic bacteria keep purifying the water of the organic remains and leave it in optimum conditions for discharging.
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