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- Title
Function of Wood Chips for Composting of Sewage Sludge by Thermophilic and Aerobic Digestion.
- Authors
HASHIMOTO, K.; DOI, T.; OKUDA, T.; NISHIJIMA, W.; NAKAI, S.; NISHIMURA, K.
- Abstract
Thermophilic and aerobic digestion (TAD) of sewage sludge was performed using Chamaecyparis obtusa, Cryptomeria japonica, and Pinus densiflora wood chips to confirm physical and chemical properties of woody bulking agents affecting digestion efficiency. About 60% of digestion efficiency was attained by the C. obtusa and C. japonica wood chips, while that by P. densiflora was only 40%. Neither the difference of porous structure nor inclusion of anti-bacterial substances accounted for the different digestion efficiencies. P. densiflora wood chips have the highest acid leachability, and we finally confirmed that lowering pH to 6 was responsible for the lowest digestion efficiency.
- Subjects
SLUDGE management; WASTE management research; SEWAGE purification; JAPANESE red pine; CRYPTOMERIA japonica; CHAMAECYPARIS obtusa
- Publication
Journal of Residuals Science & Technology, 2015, Vol 12, Issue 2, p53
- ISSN
1544-8053
- Publication type
Article
- DOI
10.12783/issn.1544-8053/12/2/3