Titles

This manuscript and associated special technical session was designed to continue the process of updating the 2004 U.S. Environmental Protection Agency (EPA) Guidelines for Water Reuse. The individual sessions are designed to walk the attendees through the updating process and technical issues that are being addressed in the update. Throughout the sessions there will be opportunities to ask...

 

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...

 

Based on input from leading stormwater professionals, the Water Environment Federation (WEF) Stormwater Institute (SWI) developed Rainfall to Results: The Future of Stormwater. The report detailed the challenges, opportunities, and pathways to improving the nation’s stormwater systems to make them more efficient, effective, and sustainable. The report also developed a vision for the future of stormwater: Plus, the report identified six objectives that are central to supporting the future of stormwater vision. To begin working toward these objectives, the SWI conducted national assessment surveys of municipal separate storm sewer system (MS4) permittees in 2018 and again in 2020. This report details the results.

On April 27-28, 2020, water professionals and clean water advocates from the US will convene in Washington DC to make their voices heard during the annual Water Policy Fly-In. The article covers the event's activities and issues that will be discussed.

2020 is a good year to examine stormwater management progress in the United States over the past few decades. CDM Smith Vice President Virginia Roach offers her perspective on the goals set in the 1990s, rising popularity of green infrastructure, impacts of climate change, lessons learned, and resulting new stormwater management approaches.

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...