Leaf, William

William Leaf is a registered professional engineer, specializing in wastewater treatment, startup and commissioning, and process optimization. Mr. Leaf has over 25 years of experience in the industry, focusing primarily on municipal wastewater treatment. He has been involved in the evaluations, design, and implementation of a number of different treatment technologies including biofilm-based approaches. Mr. Leaf is a vice president and principal water resource recovery technologist with Jacobs Engineering, based in Boise, Idaho. When not at work, William spends his time with family, friends, and skis as much as possible.

Titles from this speaker

Fundamentals of Biofilm Reactor Design and Operation

This paper was presented at the WEFTEC 2024 conference in New Orleans, LA October 5-9.

SpeakerButler, Caitlyn

Presentation time

08:30:00

10:00:00

Session time

08:30:00

10:00:00

SessionFundamentals of Biofilm Reactor Design and Operation

Session number310

Session locationRoom 238

TopicFacility Operations and Maintenance, Fundamental Level, Municipal Wastewater Treatment Design, Nutrients

Author(s)

Butler, Caitlyn, Dagnew, Martha, Gordon, Kelly, Leaf, William, Ackman, Philip, Reina, Jenny

Author(s)C. Butler1, M. Dagnew2, K. Gordon3, W. Leaf4, P. Ackman5, J. Reina4

Author affiliation(s)1University of Massachusetts Amherst, 2 Western University, 3Stantec, 4Jacobs, 5 Los Angeles County Sanitation District

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2024

DOI10.2175/193864718825159730

Volume / Issue

Content sourceWEFTEC

Word count8

Description: Integrated Fixed-film Activated Sludge (IFAS): Operational Experience in Achieving...

Integrated Fixed-film Activated Sludge (IFAS): Operational Experience in Achieving High Levels of TN Removal With Variable Conditions

Abstract

Performance of the integrated fixed-film activated sludge (IFAS) process that has been in operation at the Bend Water Reclamation Facility (WRF) since September 2015 in various configurations has provided exceptional total nitrogen (TN) removal, achieving secondary effluent values of 3 mg-N/L for extended periods. Throughout the past seven years, the system has proven to be robust and reliable, with the ability to accommodate major changes within the City’s user area while still exceeding treatment goals. In addition to significant increases in wastewater carbon and nutrient loads to the WRF, the wastewater characteristics have also changed in the system. The soluble carbon fraction of the wastewater has significantly increased, resulting in impacts to bioreactor performance and sludge settleability. Operations and design have several lessons-learned through the startup and commissioning phases through the past years of operation. Optimization continues to improve overall energy efficiency of the system.

This paper highlights the performance of the integrated fixed-film activated sludge (IFAS) process that has been in operation at the Bend Water Reclamation Facility (WRF) since September 2015 in various configurations. Over the past eight years, the system has proven to be robust and reliable, with the ability to accommodate major changes within the City's user area while still exceeding treatment goals. The paper highlights the performance of the system and discusses lessons learned.

SpeakerLeaf, William

Presentation time

16:00:00

16:20:00

Session time

15:30:00

17:00:00

SessionAlternative Approaches to Intensify Secondary Treatment

Session locationRoom S404a - Level 4

TopicIntermediate Level, Municipal Wastewater Treatment Design, Nutrients

Author(s)

Leaf, William