November 2022

Proposal of a New Centralized Biosolids Management Strategy for Nanaimo's Treatment Plants by UBC Design Team

Hosted by the Tri-City Branch

Status: Registration is now closed.
Date: Wednesday, November 23, 2022
Time: 6:00 PM–8:00 PM Pacific Time
Location: Webinar
Presenter: Ben Alberga

Caelan Accili

Mohamed El Badrawy

Parsa Mivehchi

Ramzi Hijazi
Credit: Eligible for 1.5 CE Hour(s) of Technical Learning
Engineers and Geoscientists BC Registrant Regular Price: $10.00 + GST = $10.50

Non-Registrant Price: $15.00 + GST = $15.75

Student Price: $10.00 + GST = $10.50
Contact: For more information, please email the Tri-City Branch.
Note: Registration deadline is Friday, November 18, 2022.
Join the Tri-City Branch to learn about the University of British Columbia's design team, UBC Waternauts, and their centralized biosolids management strategy for the Regional District of Nanaimo's water treatment plants as part of the BC Water and Waste Association (BCWWA) Student Design Competition. Team Waternauts have won first place at the 2022 BCWWA Student design competition back in May and recently placed second amongst 25 teams at the 2022 WEFTEC Conference in New Orleans, Louisiana.

The Regional District of Nanaimo (RDN) is investigating options for a new biosolids management strategy. This study proposes a new solution to the RDN’s biosolids program that consists of a thermal hydrolysis unit, a biogas upgrade process, and a composting system. All three units are to be built and installed at the Greater Nanaimo Pollution Control Center (GNPCC). The thermal hydrolysis unit is to be placed prior to anaerobic digestion at GNPCC and modifies the sludge properties. It decreases the required digester volume by 70% and increases the rate of anaerobic digestion by a factor of 2.3. The GNPCC anaerobic digester biogas will undergo water scrubbing to be upgraded to biomethane. A compost and curing facility is proposed to treat Class A and B biosolids from GNPCC and FCPCC to produce a Class A compost. The proposed solution has an estimated capital cost of 31.2 million USD and an annual operating cost of 3.2 million USD. The products of the operation include about 10,500 yards of compost and over 27,000,000 kWh of renewable natural gas annually. The proposed solution has an annual revenue of 2.3 million USD.


This session will be presented by the winners of the 2022 BC Water and Waste Association Student Design Competition, UBC Environment Engineering students: Ben Alberga, Caelan Accili, Mohamed El Badrawy, Parsa Mivehchi, and Ramzi Hijazi

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