ADVANCED WASTEWATER TREATMENT BY HYDRAULIC AUTOMATIC FLOATING MEDIA FILTER

Tran Thanh Son

Abstract


A pilot scale experiment was carried out in tertiary wastewater treatment using hydraulic automatic floating filter. The hydraulic automatic floating media filter has been working with 120 cm depth of polystyrene bed. Wastewater from secondary biological treatment of WWTP was treated  in the pilot filter with filtration velocity  of 4 m/h. Oxygen concentration was remained constantly at level 2.0 mg/l by using an ejector.  Headloss development and evaluation of SS, COD, NH4+ removals during filtration were objectives of the study. The experiment results showed that concentrations of SS, COD and NH4+ in effluent wastewater were kept lower than 5 mg/l, 30 and 0.5 mg/l respectively for almost filtration cycle. Effects of treatment in SS, COD and NH4+ were 88.27 %, 68.54 % and 5.59 %, respectively.


Keywords


headloss, COD removal, SS removal, NH4+ removal, hydraulic automatic floating media filter.

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DOI: https://doi.org/10.15625/2525-2518/55/4C/12166 Display counter: Abstract : 88 views. PDF : 130 views.

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Published by Vietnam Academy of Science and Technology