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Publications

Publications are listed in order of Publication Date with most recently published on top.

Estimating the National Costs of Regulating Perchlorate in Drinking Water

A prior assessment estimating the national compliance costs associated with perchlorate (Russell et al. 2009) was updated to account for utility actions taken in response to state regulations for perchlorate in California and Massachusetts. The updated cost assessment reinforces concern that the potential impacts of establishing a federal maximum contaminant level for perchlorate on individual systems are significant, particularly for small water systems.

A Comparative Evaluation of Community Structure in Full-Scale Digesters Indicates that Two-Phase Digesters Exhibit Greater Microbial Diversity than Single-Phase Digesters

Two-phase (acid-gas) anaerobic digestion can improve process performance relative to conventional, mesophilic, single-phase anaerobic digestion. However, few studies have considered the impact of phase separation on microbial community structure. We compared six full-scale, two-phase digestion (TPD) facilities and four conventional digestion (CD) facilities at municipal wastewater treatment plants by collecting performance data and evaluating microbial community structure via Illumina 16S rRNA gene sequencing.

Potential Use of Sulfite as a Supplemental Electron Donor for Wastewater Denitrification

This paper reviews sulfite in the environment, sulfite chemistry, microbiology, toxicity, and its potential use for denitrification.

Our review of the literature, as well as our own lab experience, suggests that sulfite  can effectively serve as an electron donor for denitrification. Further research is needed to determine the kinetics of sulfite-based denitrification, its toxic threshold for sulfur-oxidizing microorganisms, and its potential inhibition of sensitive species such as nitrifying microorganisms and potential formation of nitrous oxide.

Pathogen Removal in DPR: Lessons from Big Spring

The water quality success of the direct potable reuse project in Big Spring is measured by a nearly three-year long study that has spanned the majority of the facility's operating history to date. Study sampling for a wide range of CECs indicates that concentrations in the influent to the advanced treatment train are already below health-based benchmarks defined by a national panel of experts, and concentrations in the product water, where detected, are even lower. This article is focused on the results of pathogen sampling and the implications of those results.

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