Evaluation of enzyme activity for monitoring biofiltration performance in drinking water treatment
| Autor: | Meaghan R. Keon, Michael J. McKie, Robert C. Andrews, Liz Taylor-Edmonds |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
0207 environmental engineering 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification chemistry.chemical_compound Dissolved organic carbon Organic matter 020701 environmental engineering Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering chemistry.chemical_classification biology Ecological Modeling Drinking Water Biodegradation Pollution 6. Clean water Enzyme assay Disinfection Trihalomethane chemistry Environmental chemistry Biofilter biology.protein Water treatment Water quality Filtration Water Pollutants Chemical Trihalomethanes |
| Zdroj: | Water research. 205 |
| ISSN: | 1879-2448 |
| Popis: | Many water providers monitor adenosine triphosphate (ATP) as an indicator of biological acclimation of their biofilters; however, strong correlations between ATP concentration and filter performance (e.g., organic matter or disinfection by-product precursor removal) are not typically observed. As an alternative, this study evaluated the use of enzyme activity for monitoring biological processes within filters. Recent studies have proposed that enzyme activity may be used as an indicator of biofilter function as it provides a means to quantify biodegradation which may allow for a more accurate measure of degradation potential and to gain a better understanding of biofilter performance. Sampling was completed from full- and pilot-scale biofilters to assess impacts associated with pre-treatments, varying sources waters, as well as pre-treatment and operating conditions. Enzyme activity (carboxylic esterase, phosphatase, s-glucosidase, α-glucosidase, s-xylosidase, chitinase, and cellulase) and ATP were measured from the top 5 cm of biofilter media representative of typical full-scale sampling; water quality parameters included dissolved organic carbon (DOC) and disinfection by-products (DBPs): trihalomethane (THM) formation potential (FP), and haloacetic acid FP (HAA FP). Results confirmed that ATP was not a reliable monitoring tool for DOC and DBP FP reduction in biofilters. A strong relationship was observed between esterase activity and DOC reduction; chitinase activity significantly correlated to THM FP reduction for filters treating three different source waters and HAA FP reduction achieved by filters treating the same source water with a range of pre-treatment and backwash conditions. This study showed that enzyme activity may be appropriate for monitoring biological processes within drinking water filters and may act as a surrogate for the removal of organic compounds. |
| Databáze: | OpenAIRE |
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