Case Study — Calera Creek Water Recycling Plant Improvement for a Class A, Odor-free Biosolid
Author: Gromm, Dave
Source: Proceedings of the Water Environment Federation, Residuals and Biosolids 2011 , pp. 265-272(8)
Publisher: Water Environment Federation
Abstract:The term Autothermal Thermophilic Aerobic Digestion, or ATAD, was first used in 1978. The process has gained popularity as it often achieves cost and space savings when compared to anaerobic and conventional aerobic digestion. In addition, the process results in a Class “A” biosolid.
In September, 2000, the Calera Creek Water Recycling Plant, in Pacifica, California, installed a “First generation” ATAD. Although an effective digester, this system provided oxygen levels below those required by the microorganisms. As a result, mercaptans and odorous compounds were produced; a situation unacceptable to the residents of Pacifica.
The “Second Generation” ATAD systems incorporate process modifications over the “First Generation” ATAD systems including improved process control and mixing that have resulted in virtually no odor generation, greater volatile solids reduction and lower end-product volume.
Document Type: Research Article
Publication date: January 1, 2011
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- ingentaconnect is not responsible for the content or availability of external websites