Liquid stream vs. solids handling: Maximizing treatment and resource recovery
May 15, 2025
1:00 PM ET / 12:00 PM CT / 10:00 AM PT / 5:00 PM GMT
Duration: 1 hour
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A certificate of attendance will be offered.
Well designed and operated wastewater facilities can provide much needed resource recovery in the form of reclaimed water, energy and nutrients. However, designing and operating successful water reclamation facilities, requires a holistic approach to liquid stream and solids stream systems, with careful consideration of their impacts on one another.
For solids treatment, anaerobic digestion and gas utilization provide an opportunity for energy recovery in the form of electricity or renewable natural gas, but require organic carbon to be diverted from liquid stream processes using primary treatment. On facilities with nutrient limits, this can be challenging because organic carbon is required in liquid stream processes for nutrient removal. Anaerobic digestion also produces a sidestream that is high in nutrients, making liquid stream treatment more challenging. Likewise liquid stream processes impact solids treatment. Biological phosphorus removal impacts biosolids dewaterability, and phosphorus release and ammonia production in digesters can lead to troublesome struvite precipitation in downstream systems.
Advances in process technology are helping the industry to maximize the opportunities for resource recovery, while also minimizing impacts on treatment goals. Short-cut nitrogen removal processes provide opportunities to deal with high-strength sidestreams from solids treatment and are also now being proven for more efficient nitrogen removal in the mainstream that is less reliant on organic carbon.
Struvite recovery systems provide an opportunity to turn a problem into a benefit, recovering struvite as a valuable fertilizer product, rich in phosphorus and nitrogen and preventing recycle of phosphorus back to liquid stream systems. This presentation will explore the relationships between liquid stream and solids stream treatment processes in the context of designing facilities to maximize treatment efficiency and maximize opportunities for resource recovery.
Speakers
Greg Knight
Greg is an experienced process engineer with a 25-year history in the water industry. He has worked in engineering consulting for the last 18 years specializing in wastewater and biosolids. His previous roles have included Plant Manager of a large potable water treatment plant in the UK and 3 years voluntary work in Ghana with Voluntary Service Overseas (the UK equivalent of ‘Peace Corps’).
Joe Incontri
Senior Director of Marketing, North America
KROHNE, Inc.
Joe has been with KROHNE since 2002 in various roles including product specialist for level, and Director of Sales Marketing for North America. In his current role, Joe is responsible for all customer facing communications including social media, print and web marketing programs throughout the region.
Joe has worked exclusively in the North American measurement and control industry since graduating from college in Montreal several decades ago when disco was still in vogue.
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