Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).
Session Chair: Mark Cullington, Kennedy/Jenks Consultants;
8:00am - 8:45am
Planning a Biosolids Recycling Program from the Ground Up in Bellingham
Brinlee Finzel1, Ian McKelvey2
1Brown and Caldwell; 2Brown and Caldwell;
For the last 40 years, the City of Bellingham has successfully utilized an incineration process to manage residuals from the Post Point Wastewater Treatment Plant. As the existing equipment reaches the end of its useful life, air emissions regulations become more stringent, and the City looks ahead to the type of utility it would like to be over the next 50 years, the City hopes to move from a utility that disposes residuals to one that recovers resources.
To bring this vision to reality, the City is underway with a review of solids management options and development of a plan for moving forward with an economically, environmentally, and socially sustainable solution. The first phase of work considered a range of potential solutions, using public outreach and stakeholder sessions to identify key objectives. Ultimately, a triple bottom line plus (TBL+) evaluation concluded class A biosolids production with local beneficial use was the sustainable solution of choice.
At the end of 2018, specific aspects of the new program were evaluated (e.g., composting versus soil blending, digestion techniques, biogas end uses) using the same TBL+ approach to form consensus and buy-in from the stakeholders. The City now has a clear path forward for delivering sustainable, publicly accepted, recovered biosolid resources over the next 50 years.
Included in this presentation will be discussion on the:
current challenges the City faces
process used to identify, evaluate, and form consensus around solids management alternatives
technologies and processes considered
path forward for the City
8:45am - 9:30am
A Collaborative Pathway to Class A Biosolids Composting in Sweet Home, Oregon
1City of Sweet Home, Oregon; 2Murraysmith, Inc.; , , ,
Following one of the most successful collection system rehabilitation programs in the Pacific Northwest, the City of Sweet Home, Oregon is embarking on the last major upgrade to their wastewater system – expansion of its wastewater treatment plant to increase capacity, address severe deterioration of the aging facility and improve operations and maintenance through implementation of automation upgrades.
In recent years, the lack of headworks screening has limited the ability of the Sweet Home WWTP to produce a high quality Class B Biosolids product suitable for land application on sites included in the City’s Biosolids Management Plan. Consequently, the City currently spends over $100,000 annually for hauling and landfilling dewatered cake solids produced by the facility's aging belt filter press.
As part of the planned upgrades, the City is planning to construct a new offsite Class A Biosolids composting facility using cake solids from a new dewatering facility to be constructed as part the City's $28M WWTP Imrpvements Project. Green waste and hog fuel feedstocks to support the composting process will be sourced locally and the finished compost product will be used on City-owned park and open spaces. In addition, the City is anticipating a community giveaway program for local residents.
The presentation will provide an overview of the City's WWTP Improvements Project, initial layouts for the offsite Class A Biosolids composting facility, overview of composting alternatives and costs, discussions with nearby communities related to a regional composting facility and the collaborative approach between City and Murraysmith staff throughout the planning process.