Journal article
Sequential in situ hydrotalcite precipitation and biological denitrification for the treatment of high-nitrate industrial effluent
Bioresource Technology, Vol.172, pp.373-381
2014
Abstract
A sequential process using hydrotalcite precipitation and biological denitrification was evaluated for the treatment of a magnesium nitrate (Mg(NO3)2)-rich effluent (17,000 mg NO3−-N/L, 13,100 mg Mg/L) generated from an industrial nickel-mining process. The hydrotalcite precipitation removed 41% of the nitrate (7000 mg NO3−-N/L) as an interlayer anion with an approximate formula of Mg5Al2(OH)14(NO3)2·6H2O. The resultant solute chemistry was a Na–NO3–Cl type with low trace element concentrations. The partially treated effluent was continuously fed (hydraulic retention time of 24 h) into a biological fluidised bed reactor (FBR) with sodium acetate as a carbon source for 33 days (1:1 v/v dilution). The FBR enabled >70% nitrate removal and a maximal NOx (nitrate + nitrite) removal rate of 97 mg NOx-N/L h under alkaline conditions (pH 9.3). Overall, this sequential process reduced the nitrate concentration of the industrial effluent by >90% and thus represents an efficient method to treat Mg(NO3)2-rich effluents on an industrial scale.
Details
- Title
- Sequential in situ hydrotalcite precipitation and biological denitrification for the treatment of high-nitrate industrial effluent
- Authors/Creators
- K.Y. Cheng (Author/Creator) - CSIRO Land and WaterA.H. Kaksonen (Author/Creator) - CSIRO Land and WaterG.B. Douglas (Author/Creator) - CSIRO Land and Water
- Publication Details
- Bioresource Technology, Vol.172, pp.373-381
- Publisher
- Elsevier BV
- Identifiers
- 991005541763407891
- Copyright
- © 2014 Elsevier Ltd.
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
31 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.83 Bioengineering
- 3.83.466 Activated Sludge
- Web Of Science research areas
- Agricultural Engineering
- Biotechnology & Applied Microbiology
- Energy & Fuels
- ESI research areas
- Biology & Biochemistry