TnT Engineering

Creativity in Wastewater Engineering

Experience & Project Examples

Asset Management

Canton WRF Fine Screen System

Projects of All Sizes

TnT has completed several projects using innovative technology and creative designs. Below is a sampling of TnT’s experience projects followed by other projects of Mr. Gellner’s.

TnT’s sample projects:

Canton, OH Water Reclamation Facility – North America’s largest MBR activated sludge plant – Total Nitrogen/Phosphorus Removal and Miscellaneous Improvements Project for 39 MGD facility.

Canton, Ohio – Sludge study to determine sludge holding capacity for the new MBR activated sludge treatment process, capacity and production capabilities of process units, determine existing deficiencies and/or operation detriments and make recommendations based on life cycle cost.

Watek Engineering – Provide MBR technical assistance for preselecting, design and/or construction of 4 MBR activated sludge WWTP’s in Maryland.

Gnadenhutten, Ohio – Wastewater treatment plant improvements for the Preliminary Treatment updated including mechanical screen building, EQ, and other improvements to improve operational efficiencies at the existing MBR activated sludge plant.

Doylestown, Ohio – Mechanical screen and phosphorus removal system project.

CDM Smith – Assist with the design, pre-selection, and procurement of the membrane activated sludge process, QA/QC reviews of the construction documents and monitoring of the construction for a project in New York.

Numerous studies which considered MBR activated sludge.

Warren, Ohio – evaluated and prepared contract documents for the WWTP’s disinfection system upgrade which included evaluating the gas chlorination versus the use of sodium hypochlorite.

Holmesville, Ohio – Designed and assisted the community with the construction implementation of the influent screen installation at it’s WWTP.

Technical assistance to various communities on a retainer and/or as needed basis.

Samples of Mr. Gellner’s Project Experience:

Wheeling, WV Water Treatment Plant – Overall senior project engineer for design implementation, technical aspects, client communication, utility co-ordination and design team discipline coordination.

Senior Design Engineer for the following MBR WWTP’s:

Union Rome Townships Sanitary Sewer District Wastewater Treatment Plant, 1.8 MGD ADF, 5.0 MGD Peak Flow


Aerial of Delphos WWTP

Delphos WWTP – 3.84 MGD ADF, 12 MGD Peak Flow

Mr. Gellner was a principal in a partnership with USGS and the City of Delphos to study the effectiveness of disinfection following MBR activated sludge in comparison to conventional activated sludge. The study was funded by OWDA and resulted in co-authoring three journal articles which provide needed information for the industry. The results strongly question the need for disinfection after MBR activated sludge.

Summit County – Upper Tuscarawas screen building and tertiary upgrade with compressed media technology.

Summit County – Fishcreek WWTP plant expansion and upgrade from 5 MGD to 10.0 MGD ADF using Orbal activated sludge.

City of Solon – numerous improvement to sewer for much of the City including sanitary sewers, storm sewers and pump station, all of which the costs were assessed.

Erie County, OH – Upgrade and expansion of the existing water system including 7 miles of transmission main, two storage tanks and an upgrade to an existing booster station.

North Ridgeville, OH – 2 MG elevated water storage tank. Design included computer modeling and coordination with neighboring communities of shared water connection.

Barberton, OH – Rehabilitation and upgrade to the existing MGD filtration plant including expansion of filters and clearwell, new finished water pumping.

City of Painesville, OH – Studies and computer modeling to determine improvements and designs which included 13 miles of 8 inch, 12-inch and 16-inch water main; 1 MG ground storage.

Our Mission is:

Dedication to the wastewater and water industry to provide practical, cost effective, feasible and sustainable infrastructure improvements; and to protect and enrich our communities, environment and natural resource through engineering stewardship.

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