Midlands Branch Monthly Lunch & Learn
COST: Students (Free), Speaker/Sponsor (Free), ASCE Member $15, Non-Member $20
Cyclic Aeration at Columbia Metro WWTP
City of Columbia’s Metro WWTP has recently entered a new operation scheme for their Train 1 treatment processes that is rated for 40 mgd. The goals of the project were to first provide an aeration system that can fully nitrify their ammonia loading and be flexible to achieve a level of denitrification to reduce supplemental alkalinity feed. The project included a new fine bubble diffused aeration in existing aeration tanks. The complete system includes high speed turbo blowers, air piping, diffusers, mixers for anoxic mixing, and the supplemental alkalinity feed system.
The unique circular geometry with center feed influent of the basins challenged the team to create a process control narrative that would achieve the desire treatment results. Additional challenges were the high impact loadings from landfill leachate truck deliveries that Metro WWTP.
This presentation will cover the design of the system, and the three different control modes. Cyclic Aeration, a mode that provided positive results for the City’s goals, even under lower than design flow and loadings. Early results show 25% or more of alkalinity chemical feed savings. Cyclic aeration is a process at which the aeration process sees time of aerobic conditions for nitrification, and then switches to anoxic condition for denitrification to recover alkalinity. With Metro’s two-3 million gallon basins, this sequencing is possible with intense programming and numerous on-line instrumentation to monitor the health of the biology within the mixed liquor.
Clint Riley, Senior Project Manager with Aecom
Clint is a Senior Project Manager with AECOM and has 17 years of experience in the water infrastructure industry. He graduated from Clemson University with a Bachelors and Masters in Civil Engineering. He is a Professional Engineer and Level C Biological Wastewater Operator in South Carolina. He is responsible for various phases of reclaimed water and water related municipal projects, from conception and planning through construction. Duties include design, generating engineering drawings, writing, and reviewing specifications, and construction observation. Other duties include assisting in water tank rehabilitation projects and conducting hydraulic studies within the water and wastewater treatment processes. As a manager, he mentors young professionals for their career growth in the industry. Encourages professionals to be active in the local Water Environment Association and ASCE events and participate in committees to enhance their career. He is a current board member of Water Environment Association of South Carolina, holding the role of Water Environment Federation Delegate.
Michael Baker International Office, 700 Huger Street Columbia, SC 29201
There is free surface lot parking. When you enter the building, lease use the elevator to go to the second floor where the meeting will be held.
ASCE Member Everyone must register (online or email) by C.O.B. Monday February 19th.