Full-Scale Class A Biosolids Production by Two-Stage Continuous-Batch Thermophilic Anaerobic Digestion at the Hyperion Treatment Plant, Los Angeles, California

2006 ◽  
Vol 78 (11) ◽  
pp. 2244-2252 ◽  
Author(s):  
Reza Iranpour ◽  
Huub H. J. Cox ◽  
Steve Fan ◽  
Varouj Abkian ◽  
Traci Minamide ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Los Angeles ◽  
Treatment Plant ◽  
Full Scale ◽  
Two Stage ◽  
Class A ◽  
Thermophilic Anaerobic Digestion ◽  
Class A Biosolids

Thermophilic-Anaerobic Digestion to Produce Class A Biosolids: Initial Full-Scale Studies at Hyperion Treatment Plant

2006 ◽  
Vol 78 (2) ◽  
pp. 170-180 ◽  
Author(s):  
R. Iranpour ◽  
H.H.J. Cox ◽  
S. Oh ◽  
S. Fan ◽  
R.J. Kearney ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Treatment Plant ◽  
Full Scale ◽  
Class A ◽  
Thermophilic Anaerobic Digestion ◽  
Class A Biosolids

Solving fecal coliform growth/reactivation in biosolids during full-scale post-digestion processes

2005 ◽  
Vol 52 (1-2) ◽  
pp. 283-288 ◽  
Author(s):  
R. Iranpour ◽  
R. Palacios ◽  
H.H.J. Cox ◽  
V. Abkian
Keyword(s):  
Los Angeles ◽  
Fecal Coliform ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Full Scale ◽  
Fecal Coliforms ◽  
Anaerobic Digesters ◽  
Plant Conversion ◽  
Thermophilic Anaerobic Digestion ◽  
The City

Fecal coliform recurrence has been observed at the City of Los Angeles Hyperion Treatment Plant during pilot-scale experiments with a designated thermophilic battery of six anaerobic digesters, while other digesters were still at a mesophilic temperature. Several lab and full-scale experiments indicated the following possible causes of the growth/reactivation of fecal coliforms in post-digestion: a) contamination of thermophilically digested biosolids with mesophilically digested biosolids; b) a large drop in the biosolids temperature between the centrifuges and silos, which could have allowed the reactivation and/or growth of fecal coliforms. These were resolved by the full plant conversion to thermophilic anaerobic digestion and design modifications of the post-digestion train.

Extending thermophilic anaerobic digestion for producing class a biosolids at the greater vancouver regional districts annacis island wastewater treatment plant

1998 ◽  
Vol 38 (8-9) ◽  
pp. 409-416 ◽  
Author(s):  
Steve Krugel ◽  
Leslie Nemeth ◽  
Craig Peddie
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Treatment Plant ◽  
Secondary Treatment ◽  
Class A ◽  
Innovative Process ◽  
Thermophilic Anaerobic Digestion ◽  
Extended Operation ◽  
Flow Through ◽  
Bleed Through

The Greater Vancouver Regional District (GVRD) is a major regional agency managing wastewater collection and treatment for Vancouver, Canada and surrounding municipalities. As part of their $ 600 million program to upgrade 2 major plants to secondary treatment, the GVRD was faced with the requirement to produce a treated biosolids meeting the equivalent of a U.S. EPA Class A product to assure success of their new biosolids beneficial use program. Various alternatives to achieve a Class A product were evaluated in detail. The GVRD selected a new and innovative process which they termed extended thermophilic anaerobic digestion. The characteristics of this process which help achieve required pathogen kills are the thermophilic operating temperatures and the series operation of reactors, cutting the bleed-through of pathogens observed in conventional complete mix systems. The new thermophilic digesters have been in operation since 1996 and the flow-through vessels required to complete “extended” operation will be complete in late 1998.

EVALUATION OF THERMOPHILIC ANAEROBIC DIGESTION TO MEET CLASS A BIOSOLIDS CRITERIA

2003 ◽  
Vol 2003 (12) ◽  
pp. 20-32
Author(s):  
Michael D. Aitken ◽  
Mark D. Sobsey ◽  
Glenn W. Walters ◽  
Vincent Hill ◽  
Mina Shehee ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Class A ◽  
Thermophilic Anaerobic Digestion ◽  
Class A Biosolids
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