The reduction of pathogens and indicator organisms through secondary effluent filtration was investigated at six full-scale treatment facilities, ranging in capacity from 0.04 to 1 m3/s (1 to 25 mgd). Grab samples were assayed for pathogens (cultivable enteric viruses, Giardia, and Cryptosporidium) and indicator organisms (coliforms, enterococci, Clostridium perfringens, and coliphages) quarterly under peak flow conditions from each facility over the course of 1 calendar year. Log10 removals resulting from filtration averaged 0.3 to 0.8 log10 for cultivable enteric viruses, 0.4 to 1.5 log10 for protozoan parasites, 0.01 to 3.7 log10 for indicator bacteria, and 0.3 to 1.1 log10 for coliphages. In addition to filter design (cloth, monomedium shallow- or deep-bed, or dual-media filters), differences in reduction of pathogens and indicators could be attributed to the combined effects of hydraulic loading rates, chemical addition practices, backwashing and postbackwashing operating strategies, and the effectiveness of upstream biological treatment and sedimentation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.2175/106143008x266742 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Assessing the efficiency and potential for internally reusing nitrogen-containing effluent in the PHA accumulation stage under low C/N conditions in a mixed-culture process.
Bioresour Technol
December 2024
School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China. Electronic address:
Article Synopsis
- Polyhydroxyalkanoates (PHAs) are biodegradable plastics that can be produced through a mixed culture-based process, but ammonia nitrogen can hinder this production.
- This study explores ways to efficiently reuse ammonia nitrogen to enhance PHA synthesis and reduce waste.
- Results showed a significant increase in PHA production when using specific substrate and process conditions, while also effectively recycling ammonia without negatively affecting the mixed culture's properties.
Novel Stepped Combined Constructed Wetland For Surface Water Removal: Enhancing the Performance and Responses of Microbial Communities.
ACS Omega
December 2024
East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, 300 Jungong Road, Shanghai 200090, China.
Micro-polluted surface waters (MPSWs) draw increased concern for environmental protection. However, traditional treatment methods such as activated sludge, ozone activated carbon, and membrane filtration suffer from high cost and susceptibility to secondary pollution and are rarely used to address MPSWs. Herein, a new stepped combined constructed wetland planted with without additional inputs was developed.
View Article and Find Full Text PDFNatural pigments and biogas recovery from cyanobacteria grown in treated wastewater. Fate of organic microcontaminants.
Water Res
December 2024
GEMMA - Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya-BarcelonaTech, c/ Jordi Girona 1-3, Building D1, Barcelona 08034, Spain. Electronic address:
Cyanobacterial wastewater-based biorefineries are a sustainable alternative to obtain high-value products with reduced costs. This study aimed to obtain phycobiliproteins and carotenoids, along with biogas from a wastewater-borne cyanobacterium grown in secondary effluent from an urban wastewater treatment plant, namely treated wastewater. For the first time, the presence of contaminants of emerging concern in concentrated pigment extracts was assessed.
View Article and Find Full Text PDFNewly Isolated LAMA1607 for Enhanced Biological Phosphorus Removal: A Genomic and Functional Characterization.
Front Biosci (Elite Ed)
December 2024
Polytechnic School, University of Vale do Itajaí (Univali), Itajaí, SC 88302-202, Brazil.
Background: Enhanced biological phosphorus removal (EBPR) systems utilize phosphorus-accumulating organisms (PAOs) to remove phosphorus from wastewater since excessive phosphorus in water bodies can lead to eutrophication. This study aimed to characterize a newly isolated PAO strain for its potential application in EBPR systems and to screen for additional biotechnological potential. Here, sequencing allowed for genomic analysis, identifying the genes and molecules involved, and exploring other potentials.
View Article and Find Full Text PDFReducing the molecular oxygen activation energy barrier by increasing Fe-O bonds to eliminate antibiotics and their resistance genes.
J Hazard Mater
December 2024
Guangzhou Environmental Technology Center, Guangzhou, Guangdong 510235, China.
Sulfamethoxazole (SMX) and its antibiotic resistance genes (ARGs) are potential threats to public health. Microwave catalytic technology is an efficient environmental remediation technology, and a reasonable design of the catalyst enables the system to achieve an ideal remediation effect under low microwave power. In this study, a microwave catalyst (FeCO-2) that activates molecular oxygen (O) was designed on the basis of rational theoretical organization.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!