Abstract: Factors affecting the nitrification rate in post‐secondary water hyacinth treatment systems are investigated. Parameters studied include ammonia concentration, dissolved oxygen concentration, and system mixing. The ...

Abstract: A pilot‐scale treatment system, for developing drip‐irrigation pretreatment criteria, was designed, installed, and operated intermittently over 5,300 h using activated sludge secondary effluent. Principal unit processes ...

Abstract: In the design of an ultraviolet (UV) disinfection system for a wastewater treatment plant (WWTP), the number of lamps necessary to meet the permit requirements must be determined. Factors influencing the required number ...

Abstract: The feasibility, advantages, and problems of using linear‐programming methods in the preliminary analysis of central material‐recovery facilities are discussed and demonstrated. The design and operation of such facilities ...

Abstract: GIGO, a spreadsheet-based model of municipal solid waste (MSW) management systems is described. The model is intended for general system-level simulation consisting of linked detailed facility, process and cost models that ...

Abstract: California currently recycles treated wastewater at a volume of approximately