Improving secondary sludge biodegradability using free nitrous acid treatment

No Thumbnail Available
File version
Author(s)
Pijuan, Maite
Wang, Qilin
Ye, Liu
Yuan, Zhiguo
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2012
Size
File type(s)
Location
License
Abstract

This study presents a novel strategy based on free nitrous acid (FNA) treatment to improve the biodegradability of secondary sludge. Several experiments were conducted to demonstrate the biocidal effect of FNA on activated sludge. The viable fraction as well as the biological activity of the biomass decreased significantly after 8–48 h treatment with FNA. The biodegradability of the FNA treated sludge was compared to that of the same sludge without FNA treatment by aerobically digesting these sludges with a full-scale activated sludge for 14 and 6 days respectively. Ninety percent of the FNA treated biomass was consumed during the 14-day aerobic digestion compared to 41% achieved with the untreated biomass. During the 6-day aerobic digestion, 50% of the FNA-treated sludge was degraded. The results indicate that FNA treatment substantially increases sludge biodegradability.

Journal Title

Bioresource Technology

Conference Title
Book Title
Edition
Volume

116

Issue
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Environmental biotechnology not elsewhere classified

Persistent link to this record
Citation
Collections