Effects of treatment processes on AOC removal and changes of bacterial diversity in a water treatment plant

Addition of GAC caps and ozonation to conventional filters for improved organics and disinfection by-product reduction

“…35 Improvements were attributed to pre-oxidation of larger aromatic organic components into lower molecular weight compounds that are more easily biodegraded or adsorbed. 36,37 However, an optimal ozone dosage is dependent on source water composition, upstream treatment processes and the level of bioactivity associated with filtration. 9 A previous study at the same facility using GAC pilot filters demonstrated almost twice the DOC removal at a target ozone residual of 0.5 mg L −1 , 33 providing further evidence regarding the importance of site-specific studies to target organics.…”

Ozonation and Changes in Biodegradable Organic Substances in Drinking Water Treatment: The Future of Green Technology

“…To measure overall water quality, total organic carbon and conductivity analyses are additionally introduced as surrogate measurements of overall water quality [5]. It is important to prepare water in the treatment process that is free of biodegradable organic substances when pumped into the water supply system [6][7][8][9][10]. AOC and biodegradable dissolved organic carbon (BDOC) can be a source of bacterial growth and development in the water treatment process.…”

“…The biostability criterion is based on assessing the content of AOC or BDOC in water [7]. The phenomenon of the secondary development of microorganisms is primarily associated with the content of available organic carbon (AOC) [6][7][8]. AOC is part of the dissolved organic carbon (DOC).…”