…can lead to erroneous SRT estimates, (ii) incomplete specification of COD partitioning can result in underestimation of plant solids loading and corresponding under-design of clarification and aeration capacities, and (iii)…
…plan required that critical sampling locations, that would reflect the response of the system to year round tributary loading, be selected. These data needs were addressed through the collection and…
…to transform itself into a competitive world class utility, WASD made the decision to move forward and pursue a computerized comprehensive maintenance management system (CMMS). WASD is taking an innovative…
…Level II reuse during dry weather periods. Level II reuse under Oregon regulations is defined as disinfection to meet a 23 total coliform weekly median, with no more than two…
Concentration levels of nitrate in ground water pumped from public supply wells are a matter of concern for municipalities and water companies throughout the United States. When the concentration of…
The City and County of Sacramento undertook a study to characterize the variability of total recoverable concentrations of chromium, copper, lead, and zinc in urban runoff. These trace metals had…
Past design of secondary clarifiers has relied on empirical experience, e.g., maximum allowable overflow rates and solids loadings. Although recent development of solids flux theory has led to increased understanding…
As more communities become concerned about raising user fees to fund new water and wastewater systems, getting the most out of existing facilities is a top priority. Making simple performance-enhancing…
Communities are concerned about the need to raise user fees to fund new water and wastewater treatment systems. To get the most out of existing facilities, simple performance-enhancing modifications to…
Enhanced biological phosphorus removal (EBPR) technologies convert soluble phosphorus to a solid form through microorganisms which uptake soluble phosphorus. While not fully understood, EBPR has been successfully practiced for over…
…facility1. One of the better known examples is the discharge of treated groundwater from the Stringfellow hazardous waste disposal facility, a Superfund site, to two wastewater treatment plants operated by…
…hurricane. The wastewater needs of the city will never be completely defined or understood. Like a hurricane, wastewater systems are constantly changing in intensity and magnitude and must be continuously…