A comparison of biological nutrient removal in intermittent cyclic and continuous activated sludge systems

Ho K.-m., Greenfield P.F., Blackall L.L., Bell P.R.F. and Krol A. (1994) A comparison of biological nutrient removal in intermittent cyclic and continuous activated sludge systems. Resources, Conservation and Recycling, 11 1-4: 149-159. doi:10.1016/0921-3449(94)90086-8


Author Ho K.-m.
Greenfield P.F.
Blackall L.L.
Bell P.R.F.
Krol A.
Title A comparison of biological nutrient removal in intermittent cyclic and continuous activated sludge systems
Journal name Resources, Conservation and Recycling   Check publisher's open access policy
ISSN 0921-3449
Publication date 1994-06-30
Sub-type Article (original research)
DOI 10.1016/0921-3449(94)90086-8
Volume 11
Issue 1-4
Start page 149
End page 159
Total pages 11
Subject 2105 Renewable Energy, Sustainability and the Environment
2308 Management, Monitoring, Policy and Law
2311 Waste Management and Disposal
Abstract An assessment was made of biological phosphorus and nitrogen removal and related sludge bulking control in both intermittent cyclic and continuous activated sludge systems. Experimental results from a laboratory-scale investigation using fermented domestic sewage indicated the advantages of achieving high levels of P and N removal and good sludge-settling properties using the intermittent cyclic process, as compared to the continuous process. The modified intermittently fed and decanted system incorporating non-mixing sequences produced an effluent quality of NO3-N < 5 mg L-1, PO4-P < 1 mg L-1 and NH3-N < 2 mg L-1, with a non-bulking sludge having a sludge volume index < 120 mL g-1, despite unfavourable influent characteristics (TCOD : TKN < 7, TKN > 60 mg L-1, TP-9 mg L-1 and RBCOD < 30 mg L-1). In contrast, the modified 4-stage Bardenpho process could not achieve effluent NO3-N and PO4-P concentrations of < 10 and < 1 mg L-1, respectively. The sludge volume index (SVI) values were always higher than 250 mL g-1 and occasionally reached as high as 422 mL g-1. The causative filaments were low F:M growers - Types 0041/0675.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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