Titles

The Orange County Sanitation District (OCSD) scheduled an update of its 2002 Odor Control Master Plan for 2014. The Engineering Planning Division began the assessment project in July 2013, which is to be completed in two separate phases. Phase I will collect the necessary information about the odors present at the different treatment processes at its two plants, and Phase II...

 

WEFTEC, the largest event of its kind in North America, offers water quality professionals the best in water quality education and training. With almost 200 technical sessions, workshops, mobile sessions, local facility tours and 1,000+ exhibitors, it is the premier water conference! The WEFTEC technical program is selected through a rigorous, peer-review process, ensuring that attendees experience the highest-quality education. WEFTEC speakers are experts and innovators, leading the way in water quality. The following paper was presented at WEFTEC 2017.

Kambhu and Andrews (1969) conducted the first research effort focusing on ‘autothermal thermophilic aerobic digestion’ (ATAD) technology in the late 1960's. Using a computer simulation, these researchers theoretically demonstrated that autothermal operation was possible with systems supplied both with high-efficiency aerators and influent TSS levels ranging between 4 and 6% solids.

Kambhu and Andrews (1969) conducted the first research effort focusing on ‘autothermal thermophilic aerobic digestion’ (ATAD) technology in the late 1960's. Using a computer simulation, these researchers theoretically demonstrated that autothermal operation was possible with systems supplied both with high-efficiency aerators and influent TSS levels ranging between 4 and 6% solids.

The 2nd Street Pump Station and Force Main Project (2nd St. PS) provides adaptive means of managing two major Wastewater Treatment plants and tributary sewer infrastructure during dry and wet weather by providing the ability to choose either: (a) what level to maintain in three interceptors during moderate wet weather events; or (b) how much flow to receive at either plant...

Numerical modeling was used to test and improve the capacity of existing secondary clarifiers for the City of Longmont, Colorado. The model was used to develop an energy dissipating inlet for a new clarifier and develop modifications that could be retrofit into two existing clarifiers to improve their settling capacity. The existing clarifiers were retrofitted and the plant data showed improved...

Dissolved Air Flotation (DAF) is one of the first unit operations in primary wastewater treatment and is designed to separate suspended solids. In food and beverage applications where clean in place (CIP) is common, large swings in wastewater solids loading, charge demand and pH can occur frequently. Demand for coagulants and flocculants added to aid in DAF solid/liquid separation varies with...

East Bay Municipal Utility District (EBMUD) conducted a pilot study to demonstrate the production and use of biodiesel from interceptor grease waste. Bench-scale testing was followed by pilot-scale production of 200 to 400-L batches. Brown grease with a free fatty acid (FFA) content of 54-100% was obtained from interceptor grease hauled to EBMUD's wastewater treatment plant. Free fatty acids were...

The integrated control system, a central component of the recently completed Littleton/Englewood Wastewater Treatment Plant's Phase 2 project, was engineered and implemented by Brown and Caldwell to provide value to the owner over the entire life-cycle of the project. The focus on value led to the development of advanced features that provided benefits during project delivery, facility operation,...

 

The 39th Street conduit is the Metropolitan Water Reclamation District of Greater Chicago's (District's) oldest and largest intercepting sewer. The most cost-effective method to rehabilitate the 6.10 meter (20 foot) diameter brick sewer was to complete the project in two phases, limiting service disruption and flooding risk. Phase 1, completed in 2012, consisted of a deep...