Florence Wastewater Treatment Facility Explores Value-Added Biosolids Composting
In 2009, the City of Florence, under the direction of City Public Works Director Mike Miller, commissioned a study to explore treatment methods that could provide value-added processing for the town’s biosolids.
PROJECT DETAILS
Ownership: City of Florence, Oregon
Location: Florence, Oregon
Start-Up: Demonstration Project: 2010 – Phase I: 2012 – Phase II: 2016
Product: SG MOBILE® System with GORE® Cover
Input quantity: 200 tons per batch (100 tons per heap)
No. of Heaps: 2 Heaps, 50 ft. x 20 ft. x 9 ft. each
Treatment Time: 8 weeks in 3 phases
Aeration: In-ground (previously above-ground)
Control Parameters: Oxygen Control Mode
Input material: Biosolids
Equipment: Alu Front end mixer for bobcat; Front-end-loader; Rock Screen
End Product: High quality Finished Compost, FloGro Compost
THE SG SOLUTION
A Pilot Program to Prove Value
After investigating various CASP methods in 2010, the City ran a pilot demonstration project using the SG MOBILE® System with GORE® Cover because it did not require dedicated construction or hard-wired equipment. The pilot proved that this system could produce a Class A product and meet pathogen and Vector Attraction Requirements (VAR) requirements. The City of Florence also concluded that the SG system provided the most cost-effective solution based on a Price-Performance evaluation.
In 2012, the City applied for and was awarded a Lane County Waste Diversion Opportunity Grant for $100,000 to support a small-scale biosolids composting facility. After a rigorous selection process, the City of Florence chose Sustainable Generation® to provide an SG MOBILE® System with GORE® Covers utilizing above-ground aeration, based on their expertise and the system's proven effectiveness.
In the winter of 2012, the SG and the City of Florence Wastewater Treatment Facility teams installed the system, allowing the City of Florence to generate up to 600 tons of Class A biosolids compost yearly.
PROJECT GALLERY
RESULTS DELIVERED
A Sustainable Solution with True Scale
In 2014, the City of Florence moved the SG Mobile® System to a dedicated asphalt pad and installed in-ground aeration piping.
In 2016, the City of Florence added a second SG Mobile® System, enabling the operation to produce 1,200 tons of Class A biosolids compost per year.
The City of Florence gives free, high-quality compost to residents of Florence, Oregon. Under the guidance of Public Works Director Mike Miller, the compost is branded as FloGro. Each giveaway saw a line at the gate, and the product was fully distributed within two hours, highlighting both the demand for and the quality of FloGro.
The City of Florence is exploring the development of a larger-scale facility utilizing the same technology.