Organic matter removal in bio-filters to achieve biologically stable water downstream of the process

摘要

Organic removal contaminants reclamation has increased over the past years as it has many advantages overrnother treatments. Product water from water treatment plants can be chemically complex resulting in physicalrnand biological changes during transportation in the distribution systems. The general aim of this study was tornevaluate the effectiveness of biofilters for reducing the concentration of organic matter in order to produce biologicallyrnstable water, avoiding biofouling formation downstream of the process units. Enhanced coagulation andrnmedia filters of expanded clay, sand, and biological activated carbon (BAC) have been assessed. PH and coagulantrndose have been optimized to achieve maximum turbidity and organic removal. Filtration stages along thernoperation have been monitored, measuring parameters such DOC (Dissolved Organic Carbon), UVabs (ultravioletrnabsorbance), BDOC (Biodegradable Organic Carbon) and AOC (Assimilable Organic Carbon). Once the biologicalrnstage was achieved and the organic removal was constant and steady along the process units, the BDOC analysisrnshowed evidence of the outcomes of each filtration system, with BAC filters in conjunction with enhanced coagulationrngiving outstanding performance.