Oxygen Transfer in a Full-Depth Biological Aerated Filter
The City of San Diego, California, evaluated the performance capabilities of biological aerated filters (BAFs) at the Point Loma Wastewater…
Biological Wet Weather Treatment
Biological contact process provides secondary treatment for wet weather flows. For years, many wastewater treatment plants protected their secondary treatment…
The Importance of Structural and Gel Fractions in Determining Shear Sensitivity of Sludge.
Shear sensitivity measurements with variation of ingredients in a synthetic sludge can be related to biosolids’ structural properties and particulate…
Effective Sewer Grease Control Products: Myth or Reality?
Sewer grease blockages are responsible for sanitary sewer overflows in many wastewater collection systems. Grease blockages may be prevented using…
Greenfield Water Reclamation Plant Solids Facility; Form Meets Function for a Technological Success
A unique partnership of Owners, Engineers and Architects, and Contractors worked together for the successful implementation of the Greenfield Water…
A Comparison of the Carbon Footprint of Aerobic and Anaerobic Digestion
In the United States, anaerobic and aerobic digestion are two of the most commonly used practices for treatment of sludge…
A Preliminary Investigation into the Impact of Centrifugal Forces and Cake Properties on Methanogenesis from Dewatered Sludge Cake
This study investigated the impact of centrifugal dewatering on the methanogenic population of dewatered solids. The two parameters investigated were…
Drying Sawdust to Recover Enclosed-Vessel Compost System Capacity
The City of Newberg, Oregon, has operated a tunnel reactor compost system for over 15 years to produce a Class…
Modified Anaerobic Digestion Test Produces Reliable Results with Decreased Experimental Complexity
This study focused on evaluating additional volatile solids reduction (VSR) using a modified digestion test based on the recommended procedure…
New Rheological Method to Evaluate the Dewaterability of Biosolids
In this paper, the changes in biosolids’ rheological properties are used as a tool to assess dewaterability. A novel “immobilization…
Anaerobic Phased Solids Digestion of Mixed Wastes
The anaerobic phased solids (APS) digestion process is a two-phase semi-batch feed thermophilic digestion process that is particularly well suited…
Realizing the Full Potential of Existing Secondary Clarifiers to Increase Sustained Peak Wet Weather Capacity
Dynamic computational fluid dynamic (CFD) modeling for secondary clarifiers was used as part of a recent facilities plan for a…