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Acclimation of Nitrifiers for Activated Sludge Treatment
Nitrification kinetics were evaluated in bench-scale batch reactors fed with a synthetic wastewater containing approximately 1,000 mg ammonia-nitrogen (NH3-N)/L operated at 5, 10, …
Agronomic and Environmental Availability of Biosolids-P (Phase-II)
Concerns about water quality degradation resulting from land appliation of manures and biosolids have elicited a wide array of national and state regulations. The regulations focus …
A New Tool for Measuring Biosolids Floc Strength
The ability to measure sludge network strength is important in sludge dewatering applications because it can be used to determine optimum polymer dose for conditioning to achieve …
An Investigation into Biosolids Sampling and Handling Methods for U.S. EPA-Approved Microbial Detection Techniques
The objective of this research was to develop guidance for collecting samples of biosolids for microbial analysis to ensure representative samples are tested. The types of …
A Novel Membrane Process for Autotrophic Denitrification
Biological denitrification by heterotrophic bacteria is common in the wastewater industry in the U.S. and in drinking water processing in Europe. To facilitate heterotrophic …
A Peer Review of the City of Lincoln Nebraska Salt Creek Site-Specific Ammonia Water Quality Criteria
This report is the summary of a portion of a larger-scale project titled Salt Creek Water Quality Studies (SCWQS) performed by the City of Lincoln, Nebraska, for an approximate …
Application of a Dynamic Model to Assess Microbial Health Risks Associated with Beneficial Uses of Biosolids
Microbial risk assessment is a structured approach to estimating risks associated with environmental exposure to pathogens by using available environmental data. In this report the …
Application of DNA Microarray Technology for Wastewater Analysis
Deoxyribonucleic acid (DNA) microarrays are widely used for differential expression studies and for detection of virulence genes in pure bacterial cultures. Their use in complex …
Assessing Bioavailability of Metals in Biosolids-Treated Soils
Plant-availability of metals in biosolids-treated soils may be mathematically described by Mt = C x [1 - e- (k x t)] where Mt (mg kg-1) is the cumulative metal removal from the …
Assessing Methods of Removing Metals from Wastewater: The Effect of Ferric Chloride Addition
The presence of cationic pollutant metals in municipal wastewater effluent is a concern because stringent discharge requirements cannot always be met with conventional treatment …