期刊
BIORESOURCE TECHNOLOGY
卷 265, 期 -, 页码 207-213出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.05.109
关键词
Aquaculture sludge; Composting; Ammonia gas recovery; Next-generation sequencing
资金
- Japan Science and Technology Agency (JST)/Japan International Cooperation Agency (JICA)
- Science and Technology Research Partnership for Sustainable Development (SATREPS) through the project for Continuous Operation System for Microalgae Production Optimized for Sustainable Tropical Aquaculture (COSMOS)
- SATREPS-COSMOS Matching Fund from the Ministry of Higher Education Malaysia (MOHE)
Development of thermophilic composting for maximizing NH3 gas recovery would enable the production of a nitrogen source which is free from pathogen/heavy metal, for the cultivation of high-value microalgae. The present study examined the effect of NH3 recovery, nitrogen mass balance, and microbial community dynamics on thermophilic composting of shrimp aquaculture sludge. The emission of NH3 gas at 60 and 70 degrees C was 14.7% and 15.6%, respectively, which was higher than that at 50 degrees C (9.0%). The nitrogen mass balance analysis revealed that higher temperatures enhanced the solubilization of non-dissolved nitrogen and liberation of NH3 gas from the produced NH4+-N. High-throughput microbial community analysis revealed the shift of the dominant bacterial group from Bacillus to Geobacillus with the rise of composting temperature. In conclusion, thermophilic composting of shrimp aquaculture sludge at 60-70 degrees C was the most favorable condition for enhancing NH3 gas recovery.
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