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This study was designed to investigate the nature of colloids associated with wastewater effluents and to evaluate the association of emerging contaminants with these wastewater colloids. Two distinct emerging contaminants were investigated to gain general insight into the potential importance of emerging contaminant interactions with wastewater colloids. The first and major component of the study was to evaluate the association of antibiotic resistance genes (ARGs) with colloids and to evaluate the removal of ARGs by membrane processes. This is designated in the report as Part I. The second aspect of the study was to obtain preliminary data on the potential association of nonylphenol with a range of colloidal size fractions and to evaluate their removal in wastewater treatment plants. This is designated Part II.
Overall, the goal was to determine the degree of association of two representative emerging contaminants, ARGs and nonylphenols, with various colloidal sizes and to determine the removal efficiency of these colloids in wastewater treatment plants. If the emerging contaminants are associated with the larger size fractions, then more conventional treatment processes can be used. If emerging contaminants are associated with the smaller size fractions, advanced processes such as nanofiltration or activated carbon may be needed.
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Effect of Aluminum and Iron on Odors, Digestion Efficiency, and Dewatering Properties
This study was designed to be a follow up of the WERF Phase III odor study (Biosolids Processing Modifications for Cake Odor Reductions, 03-CTS-9T) odor study. The Phase III study found that iron...
Identification of the ‘Active’ Fraction and Metabolic Pathways in Trace Organic Contaminants Removal Using Stable Isotope Probing
The widespread presence of trace organic contaminants (TOrC), such as the endocrine disrupting compound bisphenol-A (BPA), has been cause for growing concern due to persistence in the environment...
Evaluation of Bacterial Pathogen and Indicator Densities After Dewatering of Anaerobical Digested Biosolids Phase II and III
The sudden increase in indicator bacteria, including fecal coliforms (FCs) and E. coli, was evaluated at several full-scale facilities, in addition to the increase...
Pathogen Destruction Efficiency In High Temperature Digestion
The purpose of this research was to evaluate and compare various thermophilic anaerobic digestion processes for meeting U.S. EPA biosolids Class A pathogen standards.
The project was split...
Global Lessons for Watershed Management in the United States
Water resource management in the United States is evolving in the face of continuing challenges to protect water quality, provide adequate quantities of water for competing uses, and protect...
Research Priorities for Successful Asset Management
WERF convened a workshop on March 21-22, 2002, for the purpose of characterizing the spectrum of asset management...
Sustaining High Performing Public Enterprises: Case Study of National Water and Sewerage Corporation, Uganda
Sustaining High Performing Public Enterprises presents steps taken by National Water and Sewerage Corporation of Uganda, a typical public enterprise, to sustain a high performance...
Development of Protocols and Methods for Predicting the Remaining Economic Life of Wastewater Pipe Infrastructure Assets: Phase 1 (Development of Standard Data Structure to Support Wastewater Pipe Condition and Performance Prediction)
Accurate prediction of wastewater pipe structural and functional deterioration plays an essential role in the utility asset management process and capital investment planning. The key to...
Losses in Water Distribution Networks
This is a best practice manual for addressing water losses in water distribution networks worldwide. Systems and methodologies are presented for improving water loss and leakage management in a...