New Developments in Ultraviolet Disinfection Technology for Water Reclamation
Ultraviolet (UV) disinfection is an emerging technology for production of reclaimed water, but development and testing are proving its effectiveness….
Converting a Surface Water Supply From Agricultural to Municipal Use
Nine communities in California’s Central Valley are planning a regional drinking water supply system which will convert some agricultural surface…
Evaluating Activated Sludge Secondary Clarifier Performance: A Protocol
To establish a consistent methodology for evaluating secondary clarifier performance, the ASCE Clarifier Research Technical Committee prepared procedural guidelines in…
High Rate Nitrifying Trickling Filters
A two year pilot plant study has been performed in order to evaluate a nitrifying trickling filter (NTF) process within…
Driving a CNG-Powered Sedan in California
This paper presents pertinent aspects of the operation of a sedan automobile on compressed natural gas (CNG) in Northern California….
Critical Process Design Issues in Selection of the TF/SC Process For a Large Secondary Treatment Plant
The Greater Vancouver Sewerage and Drainage District (GVS&DD) is a major regional wastewater agency serving Vancouver, Canada and surrounding municipalities….
Efluente de Alta Calidad Obtenido con Filtros Percoladores de Baja Tecnologia
Antes de 1973, el proceso a base de filtros percoladores era el sistema de tratamiento de aguas residuales más empleado…
Urban Surface Water Management Planning for the Hedges Creek Drainage Basin
The purpose of this paper is to discuss the technical evaluation and major components of the Hedges Creek subbasin management…
Managing the City of Los Angeles’ Industrial Wastewater Pretreatment Program Out of an Administrative Order and Lawsuit
The U.S. Environmental Protection Agency (EPA) has recently increased and tightened performance evaluations on municipal industrial wastewater pretreatment programs. Many…
First Wastewater Desalting Plant in Central Coast, California
This paper describes a 144.6 liter/second (L/s) (3.0 million gallon per day (mgd)) water reclamation plant and a 35 L/s…
Influence of Activated Sludge Flocculation on Secondary Clarification
The success of gravity separation of activated sludge from a treated effluent depends on the flocculent nature of the mixed…
The Significance of Metals in Stormwater Runoff: Total Versus Dissolved Concentrations-Fresno NURP Data
Based on analysis of NURP data from four sites in Fresno, California, several preliminary conclusions can be drawn about dissolved…