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Dinner Meeting - RES/SFBS - Impacts of Advanced Primary Treatment Technologies on Performance of Water Resource Recovery Facilities

November 16, 2022
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Join us at our joint November dinner meeting hosted by the Redwood Empire Section and San Francisco Bay Section with a presentation on: Impacts of Advanced Primary Treatment Technologies on Performance of Water Resource Recovery Facilities

Several filtration and micro-screen technologies have been developed to provide advanced primary treatment (APT) to replace conventional primary treatment (CPT). Primary filtration [e.g., cloth disc primary filter (CDPF)] provides improved removal of particulate material compared to CPT with a significantly smaller treatment footprint and modified effluent particle size distribution. Primary biofiltration [e.g., compressible medium biofilter (CMBF)] provides additional removal of soluble material compared to CPT. When a screening technology is used with pore size between 100 and 300 microns to replace CPT, the process application is known as micro-screening (MS). Performance data from full-, demonstration-, and pilot-scale CDPF, CMBF, and MS projects have demonstrated the feasibility of these technologies for APT.

APT technologies improve the efficiency of Water Resource Recovery Facilities (WRRF) with respect to energy and treatment performance, capacity, and footprint. APT effluent has significantly lower concentrations of total suspended solids (TSS) and biochemical oxygen demand (BOD) compared to CPT, which results in reduced secondary treatment aeration energy requirements and increased secondary treatment capacity. APT diverts carbon from the energy-intensive secondary process towards energy-recovering anaerobic digestion. The following benefits have been demonstrated using several APT technologies:

  • BOD and COD removal for APT technologies is 25–40% higher compared to CPT.
  • The overall WRRF energy savings possible with APT are significant and can be as high as 40–50%, depending on system specifics. Energy cost savings result from: (1) a reduction in the primary effluent organic load which, in turn, results in a 20–40% decrease in the aeration energy requirement in secondary treatment and (2) the high energy content of the captured VSS in filter BRW and the increased volume of primary sludge sent to the anaerobic digesters increases gas energy production in the anaerobic digester.
  • The increase in biogas energy production with APT has been estimated to be between 15 and 35%, depending on specific WRRF conditions.
  • APT can reduce the primary treatment footprint up to 80%.

Presenter’s Bio - Onder Caliskaner, Ph.D., P.E.

Dr. Caliskaner is the president of Caliskaner Water Technologies and has 28 years of experience in technology research and development, project management, process engineering, planning, and design of wastewater treatment systems. He has a Ph.D. degree from the University of California at Davis and has an M.S. degree from the University of Illinois at Urbana-Champaign. He is a registered Civil Engineer in California.

Onder’s main engineering and research interests include: primary filtration, carbon diversion, advanced primary treatment, tertiary filtration, process modeling, optimization of treatment processes, water reuse, and advanced treatment. Onder has been the principal investigator and project manager for several primary and tertiary filtration research and demonstration projects which led to fast-emerging technologies offering many significant benefits at water resource recovery facilities. Dr. Caliskaner has numerous publications and received several awards from Water Environment Federation and California Water Environment Association for his work on primary filtration, advanced primary treatment and carbon diversion. 

Venue Details

Join us at the Mare Island Brewing Company for the Mariano’s Fiesta

Registration Prices 

$40 Members
$50 Non-Members
$20 Students



Latin inspired shredded Chicken Tinga, warm Tortillas, Fresh Guacamole, shredded 3 Cheese blend, Cilantro Spiced Sour Cream, Spanish Style Rice, Braised Black Beans. Comes with 3 different Salsas:

Salsa Roja: Classic Red Salsa. Medium Spice, Roasted Tomatoes, Chilis and Onions
Salsa Verde: Medium Spice. Roasted Tomatillos & Green Chilis
Pico de Gallo: Mild Spice-Fresh Tomatoes, Onions, Cilantro and Jalapeño


Chopped Romaine, Roasted Corn, Pickled Red Onion, Cilantro, Cotija Cheese, Citrus Vinaigrette 

Mexican Chocolate Drizzle

Event Contact Info:
Nick Steiner

Sessions information is not available at this time.

Speaker information is not available at this time.