Tracking the behavior of different size fractions of dissolved organic matter in a full-scale advanced drinking water treatment plant

Quang, Viet Ly; Choi, Ilhwan; Hur, Jin

doi:10.1007/s11356-015-5040-3

Cited by 20 publications

(6 citation statements)

References 42 publications

(54 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Greater abundance of lower molecular weight compounds may contribute to inefficient DOC removal from postfire stormwater due to the hydrophilic nature of the DOM composition compared to higher molecular weight, hydrophobic humic substances. , The DOM sampled in postfire rainstorms had a higher fluorescence index (FI) (Figure ), correlated with a lower molecular weight DOM composition, which is more challenging to remove by coagulation. , Further, the FI values of samples collected from the burned area (water intake) were statistically higher than the reference site (+ 0.038), and higher than prefire data . In a different study, the authors also observed an increase in FI and blue-shifted emission spectra for leachates of soils heated at a moderate temperature (350 °C) .…”

Section: Postfire Variability In Water Treatmentmentioning

confidence: 99%

Wildfires Alter Forest Watersheds and Threaten Drinking Water Quality

et al. 2019

View full text Add to dashboard Cite

CONSPECTUS: Wildfires are a natural part of most forest ecosystems, but due to changing climatic and environmental conditions, they have become larger, more severe, and potentially more damaging. Forested watersheds vulnerable to wildfire serve as drinking water supplies for many urban and rural communities. The highly variable nature of wildfire behavior combined with spatially complex patterns in vegetation, landscape, and hydrologic factors create uncertainty surrounding the postfire effects on water supplies. Wildfires often cause dramatic changes in forest vegetation structure and soil conditions, and alter the watershed processes that control streamflow, soil erosion, nutrient export, and downstream water chemistry. The authors' work centers on field and laboratory studies to advance knowledge of postfire changes in soil and water chemical composition that influence drinking water treatment. High intensity postfire rainstorms typically increase runoff that erodes ash and soil from burned landscapes and dramatically elevates turbidity, nutrient, and dissolved organic carbon (DOC) levels in surface waters, which can cause short-term challenges for water providers. There is also growing evidence that water quality impacts can persist after high severity fires due to slow vegetative recovery, and nitrogen and DOC have remained elevated for 15 years following high severity fire. Low-moderate temperatures during wildfire may also influence water quality. Research by the authors showed that the solubility of organic matter, and C and N released from soils increased following soil heating at temperatures ≤ 350 °C. Further, the water extracted organic matter from soils heated at 225−350 °C included higher proportions of condensed aromatic structures, such as black carbon and black nitrogen. Short-term postfire water quality degradation following high intensity rainstorms can force water treatment plants to shut down or can significantly challenge treatment process performance. Extreme turbidity and high DOC in poststorm water, coupled with compositional organic matter changes, reduced the coagulation efficiency of postfire water supplies. Field and lab-based studies documented the formation of small, aromatic soluble compounds during wildfire that contribute to inefficient DOC removal from postfire stormwater. Due to increased postfire DOC concentrations, and poor treatability of poststorm runoff, toxic disinfection continued...

show abstract

Section: Postfire Variability In Water Treatmentmentioning

confidence: 99%

Wildfires Alter Forest Watersheds and Threaten Drinking Water Quality

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Despite being very powerful, EEM-PARAFAC can only characterize light-absorbing DOM constituents. This limitation can be alleviated by using size exclusion chromatography (SEC) equipped with an organic carbon detector (SEC-OCD), which further unravels the heterogeneous structures of DOM in terms of molecular sizes (Huber et al 2011, Quang et al 2015. For example, biopolymer, quantified by SEC-OCD, is known to play an important role in membrane fouling potential (Ayache et al 2013, Tian et al 2013.…”

Section: Introductionmentioning

confidence: 99%

Effects of COD/N ratio on soluble microbial products in effluent from sequencing batch reactors and subsequent membrane fouling

Nghiem

Sibag

et al. 2018

Water Research

Self Cite

View full text Add to dashboard Cite

The relative ratios of chemical oxygen demand (COD) to nitrogen (N) in wastewater are known to have profound effects on the characteristics of soluble microbial products (SMP) from activated sludge. In this study, the changes in the SMP characteristics upon different COD/N ratios and the subsequent effects on ultrafiltration (UF) membrane fouling potentials were examined in sequencing batch reactors (SBR) using excitation emission matrix-parallel factor analysis (EEM-PARAFAC) and size exclusion chromatography (SEC). Three unique fluorescent components were identified from the SMP samples in the bioreactors operated at the COD/N ratios of 100/10 (N rich), 100/5 (N medium), and 100/2 (N deficient). The tryptophan-like component (C1) was the most depleted at the N medium condition. Fulvic-like (C2) and humic-like (C3) components were more abundant with N rich wastewater. Greater abundances of large size biopolymer (BP) and low molecular weight neutrals (LMWN) were found under the N deficient and N rich conditions, respectively. SMPs from various COD/N exhibited a greater degree on membrane fouling following the order of 100/2 > 100/10 > 100/5. C1 and C2 had close associations with reversible and irreversible fouling, respectively, while the reversible fouling potential of C3 depended on the COD/N ratios. No significant impact of COD/N ratio was observed on the relative contributions of SMP size fractions to either reversible or irreversible fouling potential. However, the COD/N ratios likely altered the BP foulants' composition with greater contribution of proteinaceous substances to reversible fouling under the N deficient condition than at other N richer conditions. The opposite trend was observed for irreversible fouling. Our results provided further insight into changes in different SMP constitutes and their membrane fouling in response to microbial activities under different COD/N ratios.

show abstract

“…The adverse effect of heating on the overall treatability of the leachates might be explained by a lower‐molecular‐weight DOM composition (Quang et al, ). Although the DOM was more aromatic following heating, the smaller, nitrogen‐enriched compounds appeared less amenable to coagulation treatment.…”

Section: Resultsmentioning

confidence: 99%

“…Other research suggests that lower‐molecular‐weight DOM leached from heated materials compared with unheated materials (Wang, Dahlgren, & Chow, ). Lower‐molecular‐weight DOM is generally more challenging to remove by conventional treatment processes (Archer & Singer, ; Quang, Choi, & Hur, ; White, Thompson, Harrington, & Singer, ), with implications for finished water quality. Furthermore, an increase in nitrogenous DBP (N‐DBP) precursors has been observed for postfire river samples (Hohner et al, ), wildfire‐affected sediment leachates (Hohner, Terry, Townsend, Summers, & Rosario‐Ortiz, ), and wildfire detritus extracts (Fernández et al, ; Wang, Dahlgren, Erşan, et al, ).…”

Section: Introductionmentioning

confidence: 99%

Laboratory simulation of postfire effects on conventional drinking water treatment and disinfection byproduct formation

2019

View full text Add to dashboard Cite

What is the present research focus of your group?My research group evaluates the effects of extreme events and watershed disturbances on the resilience of drinking water systems. We study how events such as wildfire, floods, and droughts affect source water quality and treatment process performance, and how utilities can best adapt to address these disruptions in water quality. What motivated the research behind your recent article in AWWA Water Science-that is, what problems are you trying to solve?Our research was motivated by the needs of water utilities across North America, but especially utilities in the West that have experienced wildfires or are concerned about the risk of future wildfires to their water treatment system. The rise in wildfire 24 JOURNAL AWWA T h e o r y a n d P r a c t i c e o f S a f e , S u s t a i n a b l e W a t e r www.awwawaterscience.com Amanda (Mandi) collects water samples from the Naches River in central Washington during a day trip with her research group. The Naches River supplies drinking water to the City of Yakima; upstream drainage areas were burned in 2017 by the Norse Peak fire in the Cascade Mountains.

show abstract

Tracking the behavior of different size fractions of dissolved organic matter in a full-scale advanced drinking water treatment plant

Cited by 20 publications

References 42 publications

Wildfires Alter Forest Watersheds and Threaten Drinking Water Quality

Wildfires Alter Forest Watersheds and Threaten Drinking Water Quality

Effects of COD/N ratio on soluble microbial products in effluent from sequencing batch reactors and subsequent membrane fouling

Laboratory simulation of postfire effects on conventional drinking water treatment and disinfection byproduct formation

Contact Info

Product

Resources

About