Disinfection byproduct formation during biofiltration cycle: Implications for drinking water production

Delatolla, Robert; Seguin, Cassandra M.; Springthorpe, Susan; Gorman, E.; Campbell, A.M.; Douglas, Ian

doi:10.1016/j.chemosphere.2015.05.001

Cited by 23 publications

(3 citation statements)

References 29 publications

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“…Due to the difficulty in quantifying the relative contribution from different components, disinfection by-product formation potential (DBPFP) serves as a useful surrogate to predict DBP concentrations. This enables drinking-water utilities to optimize their treatment processes to reduce DBP levels in the finished water (Chen and Westerhoff, 2010;Delatolla et al, 2015).…”

Section: Disinfection By-product (Dbp) Formationmentioning

confidence: 99%

“…The coupling of oxidation processes with biological treatment is commonly adopted for DBP precursors removal (Delatolla et al, 2015). Ozonation oxidises recalcitrant organics into biodegradable organic matter (BOM), and enhances biofiltration ability to reduce the concentration of AOC and DBPs precursor to achieve biologically stable water (Lou et al, 2009).…”

Section: Dbps Control Strategiesmentioning

confidence: 99%

“…Biofiltration is a natural, cost-effective process that allows indigenous microbial community to attach and colonize the surface of granular media resulting in the biodegradation of soluble organic constituents (Zhu et al, 2010). The coupling of ozonation with biofiltration to oxidize recalcitrant organics is common practice for maximizing NOM and DBPs precursor removal (Delatolla et al, 2015). Biofiltration implementation and operation in the drinking water industry has begun shifting from a passive to an active approach that targets multiple water quality objectives including organic and inorganic removal, while maintaining acceptable hydraulic capabilities (Lauderdale et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Comparative assessment of ceramic media for drinking water biofiltration

Sharma

Taylor-Edmonds

2018

Water Research

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Media type is a critical design consideration when implementing biofiltration for drinking water treatment. Granular activated carbon (GAC) has been shown to provide superior performance when compared to a wide range of media types, largely due to its higher surface area. Engineered ceramic media is an attractive alternative to GAC as it has a similar surface area but at a lower cost. This pilot-scale biofiltration study compared the performance of GAC, anthracite and two different effective sizes of ceramic (CER) media (1.0 mm and 1.2 mm), in terms of dissolved organic carbon (DOC), head loss, turbidity, and disinfection by-product formation potential (DBPFP). Biological acclimation was monitored using adenosine tri-phosphate (ATP) measurements; biomass was further examined using laccase and esterase enzyme activity assays. When compared to other media types examined, biological GAC had higher (p > 0.05) removals of DOC (9.8 ± 3.8%), trihalomethane formation potential (THMFP, 26.3 ± 10.2%), and haloacetic acid formation potential (HAAFP, 27.2 ± 14.0%). CER media required 6-7 months to biologically acclimate, while filters containing GAC and anthracite were biologically active (>100 ng of ATP/g media) following 30-45 days of operation. Once acclimated, ATP values of 243 and 208 ng/g attained for CER 1.0 and 1.2, respectively, were statistically comparable to GAC (244 ng/g) and higher than anthracite (110 ng/g), however this did not translate into greater organics removal. Esterase and laccase enzyme kinetics were highest for GAC, while CER was shown to have greater biodegradation potential than anthracite. The four media types attained similar turbidity reduction (p > 0.05), however ceramic media filters were observed to have run times which were 1.5-2.3 times longer when compared to anthracite, which could represent potential cost savings in terms of energy for pumping and backwash requirements. Overall, ceramic media was shown to be a potential alternative to anthracite when considering biofiltration, especially during cold water conditions (T < 10 °C).

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Section: Disinfection By-product (Dbp) Formationmentioning

confidence: 99%

Section: Dbps Control Strategiesmentioning

confidence: 99%