Exceptionally high-rate nitrification in sequencing batch reactors treating high ammonia landfill leachate

Doyle, J, Watts, S, Solley, D and Keller, J (2001) Exceptionally high-rate nitrification in sequencing batch reactors treating high ammonia landfill leachate. Water Science And Technology, 43 3: 315-322.

Author Doyle, J
Watts, S
Solley, D
Keller, J
Title Exceptionally high-rate nitrification in sequencing batch reactors treating high ammonia landfill leachate
Journal name Water Science And Technology   Check publisher's open access policy
ISSN 0273-1223
Publication date 2001-01-01
Sub-type Article (original research)
Volume 43
Issue 3
Start page 315
End page 322
Total pages 8
Place of publication UK
Publisher IWA
Collection year 2001
Language eng
Subject C1
291104 Environmental Technologies
770502 Land and water management
Abstract The nitrogen removal capacity of a suspended culture system treating mature landfill leachate was investigated. Leachate containing high ammonium levels of 300-900 mg N/L was nitrified in a bench scale sequencing batch reactor. Leachate from four different landfills was treated over a two year period for the removal of nitrogen. In this time, a highly specific nitrifying culture was attained that delivered exceptionally high rates of ammonia removal. No sludge was wasted from the system to increase the throughput and up to 13 g/L of MLSS was obtained. Settleability of the purely nitrifying biomass was excellent with SVI less than 40 mL/g, even at the high sludge concentrations. Nitrification rates up to 246 mg NI(L h) (5.91 g N/(L d)) and specific nitrification rates of 36 mg N/(gVSS h) (880 mg N/(gVSS d)) were obtained. The loading to the system at this time allowed complete nitrification of the leachate with a hydraulic retention time of only 5 hours. Following these successful treatability studies, a full-scale plant was designed and built at one of the landfills investigated.
Keyword Engineering, Environmental
Environmental Sciences
Water Resources
Ammonia
Landfill
Leachate
Nitrification
Nitrogen Removal
Sequencing Batch Reactors
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
 
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Created: Wed, 15 Aug 2007, 05:40:41 EST