Kraemer, Jeremy

Jeremy Kraemer is a Wastewater Technical Director in the Waterloo office of GHD, where he provides process and facility design expertise for wastewater treatment plants across North America. He is a registered professional engineer in Ontario and obtained his Ph.D. from the University of Toronto with research specialty in anaerobic hydrogen production. He has been a member of WEF and WEAO for 20 years and is a past Director of WEAO. Jeremy is currently chair of the WEAO/OWWA climate change committee, a member of the WEF R&B Greenhouse Gas Focus Group, and also participates on the WEAO R&B committee.

Titles from this speaker

Dynamic Process Modelling for Aeration Blower Design at the Humber Treatment Plant

Abstract

The City of Toronto initiated a design and construction project in 2022 to replace the existing secondary treatment aeration blowers at the Humber Treatment Plant. A comprehensive review of historical flow and plant operating data was conducted to derive a design-year hourly diurnal flow and load profile (8,760 discrete data points) for input into a commercial wastewater process simulation tool. The output oxygen demands were used to generate process airflows considering varying wastewater temperatures, standard oxygen transfer efficiency based on net airflow per diffuser and diffuser depth, and dynamic alpha based on aeration basin oxygen uptake rates at each time step in the flow and load profile. Statistical and seasonal analyses were applied to the resulting airflow data sets to determine performance guarantee points at varying inlet air conditions for blower equipment preselection

The City of Toronto initiated a capital project in 2022 to replace the existing secondary treatment aeration blowers at the Humber Treatment Plant. A comprehensive approach was implemented to develop the process design basis for the new aeration blowers using dynamic wastewater treatment process modelling to derive process airflows for a one-year hourly diurnal flow and load profile. Resulting airflows were used to determine performance guarantee points at varying inlet air conditions.

SpeakerRizzuti, Daniel

Presentation time

08:30:00

09:00:00

Session time

08:30:00

10:00:00

SessionThe Big Bad Blower: Huffing and Puffing Air Through Your Aeration Basins

Session locationRoom S401d - Level 4

TopicEnergy Production, Conservation, and Management, Facility Operations and Maintenance, Intermediate Level, Municipal Wastewater Treatment Design

Author(s)

Rizzuti, Daniel

Author(s)D. Rizzuti 1; J. Kraemer 2 ; Pretorius 3; T. Young 4; T. Gretarsson 5; D. Pease 6; T. Shen 7; E. Eini 8; V. Szonda 6; D. Rizzuti 1;

Author affiliation(s)GHD Ltd., Waterloo, ON 1; GHD Ltd., Waterloo, ON 2 ; GHD 3; GHD 4; GHD 5; City of Toronto, ON 6; City of Toronto, ON 7; City of Toronto, ON 8; City of Toronto, ON 6; GHD 1;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159068

Volume / Issue

Content sourceWEFTEC

Word count13

MBRs Are More Cost-effective Than Ever Before

Abstract

A cost model was developed to compare the capital and 20-year lifecycle cost of MBR vs. CAS treatment technology for a greenfield WRRF. Concept designs and cost estimates were developed for six treatment performance scenarios at two design flow capacities: 20 ML/d and 200 ML/d. Compared with a prior version of this model developed in 2012, MBR has become more cost effective compared to CAS in general, most notably for less stringent treatment requirements, while the cost savings of MBR for more stringent treatment requirements has improved, but more modestly. A primary driver of this is the advancements in membrane design, primarily the reduction in air scour energy for membrane cleaning due to new diffuser technology, greater membrane packing density reducing membrane equipment costs and further reducing air scour requirements, decreased membrane cleaning requirements and longer membrane life, and increased use of gravity permeation from membranes under average day operation.

SpeakerYoung, Thor

Presentation time

16:30:00

16:50:00

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)

Young, Thor

Author(s)T. Young 1; J. Kraemer 2 ; D. Rizzuti 3; S. Malatches 4; J. Lim 5; C. Thiemig 5; T. Young 1;

Author affiliation(s)GHD Inc 1; GHD Inc, Waterloo, ON 2 ; GHD Inc, Waterloo, ON 3; GHD Inc, Toronto, ON 4; Veolia Water Technologies & Solutions, Oakville, ON 5; Veolia Water Technologies & Solutions, Oakville, ON 5; GHD Inc, Bowie, MD 1;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159019

Volume / Issue

Content sourceWEFTEC

Word count8

Description: Real-world Reliability and O&M of High-speed Turbo and Integrally-geared...

Real-world Reliability and O&M of High-speed Turbo and Integrally-geared Blowers

Abstract

Aeration blowers consume around half of all electricity used at a water resource recovery facility (WRRF). Choosing the most efficient blowers can save money, electricity, and greenhouse gas emissions. High-speed turbo blowers and single-stage integrally-geared (SSIG) blowers offer some of the highest efficiencies for process aeration, but operations and maintenance (O&M) staff may not have experience with these technologies. This paper documents comparative O&M experiences between turbo and SSIG blowers compiled from interviews with thirteen (13) North American water utilities with medium to large size blower installations as well as the authors’ own experience and past projects. In addition, turbo blower reliability and failure data and maintenance contract information were solicited from turbo blower manufacturers and summarized. This information was used to support one water utility’s blower technology decision and the authors hope this information will be useful to other utilities as well.

This paper compares O&M experiences with turbo blowers and single-stage integrally-geared blowers from interviews with 13 North American water utilities with medium to large blower installations and the authors' experience and projects. Turbo blower reliability data and maintenance contract information from manufacturers is summarized. This information was used to support one utility's blower technology decision and the hope is this information will be useful to other utilities as well.

SpeakerKraemer, Jeremy

Presentation time

09:30:00

10:00:00

Session time

08:30:00

10:00:00

SessionThe Big Bad Blower: Huffing and Puffing Air Through Your Aeration Basins

Session locationRoom S401d - Level 4

TopicEnergy Production, Conservation, and Management, Facility Operations and Maintenance, Intermediate Level, Municipal Wastewater Treatment Design

Author(s)

Kraemer, Jeremy

Author(s)J. Kraemer 1; J. Kraemer 1 ; T. Jenkins 2; T. Young 3; C. Pretorius 4;

Author affiliation(s)GHD 1; GHD 1 ; JenTech Inc 2; GHD 3; GHD 4;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159070

Volume / Issue

Content sourceWEFTEC

Word count11

Tacking Fugitive Methane Emissions at WRRFs - Global Lessons

Abstract

Fugitive methane emissions from sludge treatment and biogas handling processes are a significant source of GHG emissions, particularly critical for WRRFs with anaerobic digestion. Sewer methane production can also contribute to significant GHG emissions for the entire wastewater systems. There is lack of consistent methodologies for quantifying and monitoring these emissions in North America, which could lead to over- or (more likely) underestimation of their contributions to the overall GHG footprint. Ongoing work in Europe show the criticality of direct methane emissions monitoring, and operational approaches to mitigate methane emissions through regular survey, proactive leak detection and repair and independent certification. This session will present an overview of the sources of fugitive methane emissions in collection systems and at WRRFs, available methodologies in monitoring and quantifying fugitive methane emissions (including challenges and issues), and practical tips for reducing methane emissions based on global case studies.

This paper was presented at WEFTEC 2023 in Chicago, IL.

SpeakerLake, Amanda

Presentation time

13:30:00

15:00:00

Session time

13:30:00

15:00:00

SessionGlobal Approaches to Tackling Fugitive Methane Emissions

Session locationRoom S402a - Level 4

TopicIntermediate Level, Sustainability and Climate Change, Water Reuse and Reclamation

Author(s)

Lake, Amanda

Author(s)A. Lake 1; C. Scheutz 2 ; B. Beelen 3; E. Shen 4; P. Nielsen 5; A. Vellacot 6; A. Fredenslund 7; K. Kraemer 8;

Author affiliation(s)Jacobs 1; Technical University of Denmark 2 ; GHD 3; Jacobs 4; VCS Denmark 5; Jacobs 6; Technical University of Denmark 7; GHD 8;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825158977

Volume / Issue

Content sourceWEFTEC

Word count10