Demonstrating Compliance with Stringent Nitrogen Limits Using a Biological Nutrient Removal Process in California's Central Valley.
Water Environ Res
; 87(12): 2053-64, 2015 Dec.
Article
in En
| MEDLINE
| ID: mdl-26652118
ABSTRACT
The Sacramento Regional County Sanitation District (District) must be compliant with stringent nitrogen limits by 2021 that the existing treatment facilities cannot meet. An 11-month pilot study was conducted to confirm that these limits could be met with an air activated sludge biological nutrient removal (BNR) process. The pilot BNR treated an average flow of 946 m(3)/d and demonstrated that it could reliably meet the ammonia limit, but that external carbon addition may be necessary to satisfy the nitrate limit. The BNR process performed well throughout the 11 months of operation with good settleability, minimal nocardioform content, and high quality secondary effluent. The BNR process was operated at a minimum pH of 6.4 with no noticeable impact to nitrification rates. Increased secondary sludge production was observed during rainfall events and is attributed to a change in wastewater influent characteristics.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Water Pollutants, Chemical
/
Bioreactors
/
Waste Disposal Facilities
/
Nitrogen
Country/Region as subject:
America do norte
Language:
En
Journal:
Water Environ Res
Journal subject:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Year:
2015
Document type:
Article