Minimizing Arsenic Leaching from Water Treatment Process Residuals
Ferric chloride addition was investigated for treatment of As-laden spent regeneration brine from ion exchange processes. Furthermore, varying conditions and…
Introduction of New Process Technology into the Wastewater Treatment Sector
Innovative wastewater treatment technologies are developed to respond to changing regulatory requirements, increase efficiency, and enhance sustainability or to reduce…
Integrating Anaerobic Digester with Liquid Stream Treatment: Modeling Approach
Although, anaerobic digestion (AD) modeling can provide significant benefits in the design, operation and optimization of the digestion performance, AD…
How “Green” Can We Get with Remediation? A life-cycle comparison between a conventional P&T approach vs. a “green” technology to treat a large PCE plume
The federal environmental regulatory agency in the U.S. defines green remediation as “the practice of considering all environmental effects of…
Chemical Modeling to Solve Struvite Scaling Problems at the Sacramento Regional Wastewater Treatment Plant: A Progress Report
The precipitation of struvite is a recurring problem in anaerobic sludge digestion systems. Soluble magnesium, ammonia, and phosphorus (P) released…
Asset Management: A Fad or the Future?
By their nature, U.S. water and wastewater utilities are asset-intensive service providers. Even small or mid-sized utilities can have hundreds…
Understanding Declining Water Demand: New Approaches to Research and Projections
Between the years 1990 and 2010, the population of the City of Phoenix, Arizona, increased by 46 per cent. Over…
Utilizing Recovered Heat to Economically Produce Class A Biosolids
The Clark County Department of Public Works (County) in Vancouver, Washington, evaluated alternatives for supplementing or upgrading an existing Class…
Decision Factors on Solids Dewatering Technologies for DC Water’s Biosolids Program
The DC Water and Sewer Authority (DC Water) is proceeding with implementation of its $470 million biosolids program which involves…
Optimizing Odor Control Solutions for a New Interceptor with Air Flow and Odor Generation Modeling
A study was completed to evaluate odor concerns and control strategies for the Town of Cary, North Carolina (Town) Western…
Even with a Biological System, Don't Treat before Collecting. Concepts and Design Guidelines for Four Air Ventilation and Collection
The increasing improvement in efficiency of foul air treatment systems, which can often achieve 99.9 percent odor removal, is wasted…
The Sulfur Cycle and Its Impact on Hydrogen Sulfide Emissions: an Investigation at the City of St. Petersburg, Florida
The impact of wastewater processes and their sulfur compound concentrations on hydrogen sulfide releases was investigated. Digester gas hydrogen sulfide…