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Mitigating inhibition of undissociated volatile fatty acids (VFAs) for enhanced sludge-rice bran composting with ferric nitrate amendment
- Source :
- Bioresource technology. 244(Pt 1)
- Publication Year :
- 2017
-
Abstract
- This study investigated the effect of ferric nitrate on mitigating the inhibition of volatile fatty acids (VFAs) during the initial phase of sewage sludge composting amended with rice bran. During the 34-day lab-scale composting, the supplementation of ferric nitrate enhanced the degradation of VFAs by up to 3 times as compared to the control. The organic matters loss (OML) rate in the treatment reactor was almost doubled with supplementation of ferric nitrate as compared to the control reactor during the initial phase. Eventually the treatment reactor achieved a 39.0% OML by the end of composting, which was 22% higher than the control. Ferric nitration addition mitigated the inhibition of VFAs by stimulating denitrification which consumed protons and VFAs. Ferric nitrate addition also decreased the electrical conductivity by 23% in the final compost product, reducing the possibility of phytotoxicity issue upon soil application. In summary, the results demonstrated that ferric nitrate addition could be an effective strategy for enhanced sludge composting.
- Subjects :
- Environmental Engineering
Denitrification
020209 energy
Inorganic chemistry
Amendment
Bioengineering
02 engineering and technology
010501 environmental sciences
engineering.material
complex mixtures
01 natural sciences
Ferric Compounds
chemistry.chemical_compound
Nitrate
0202 electrical engineering, electronic engineering, information engineering
medicine
Waste Management and Disposal
0105 earth and related environmental sciences
Nitrates
Bran
Sewage
Renewable Energy, Sustainability and the Environment
Chemistry
Compost
fungi
Oryza
General Medicine
Pulp and paper industry
Fatty Acids, Volatile
engineering
Ferric
Phytotoxicity
Sludge
medicine.drug
Subjects
Details
- ISSN :
- 18732976
- Volume :
- 244
- Issue :
- Pt 1
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....4fd3bc890ad6a417f66b48ca7d100081