Denitrification performance evaluation and kinetics analysis with mariculture solid wastes (MSW) derived carbon source in marine recirculating aquaculture systems (RAS)
| Autor: | Zonglian She, Fawen Hu, Mengchun Gao, Liang Guo, Yangguo Zhao, Chunji Jin, Mengyu Shao, Yedong Gao, Guangce Wang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Acidogenesis Environmental Engineering Denitrification Nitrogen Bioengineering Aquaculture 010501 environmental sciences Solid Waste 01 natural sciences chemistry.chemical_compound Bioreactors Nitrate 010608 biotechnology Waste Management and Disposal Effluent 0105 earth and related environmental sciences Sewage Renewable Energy Sustainability and the Environment Chemistry Chemical oxygen demand Rhamnolipid General Medicine Biodegradation Pulp and paper industry Carbon Kinetics Fermentation |
| Zdroj: | Bioresource technology. 313 |
| ISSN: | 1873-2976 |
| Popis: | Biological denitrification using mariculture solid wastes (MSW) carbon source is a promising solution for removing nitrate (NO3−-N) and disposing MSW in marine recirculating aquaculture systems (RAS). To enhance denitrification performance, heating (HT), rhamnolipid (RL), alkali (AL), thermophilic bacteria (TB) pre-treated MSW acidogenic fermentation effluents were prepared as carbon sources. Profiles of soluble organics in four types of fermentation effluents were first evaluated. The highest volatile fatty acids (VFAs) yield (52.1%) was obtained from TB treated MSW after acidification. RL and TB treated MSW acidogenic fermentation effluents showed high NO3−-N removal efficiency (NRE) (around 97%). Acidogenic fermentation effluent from TB treated MSW presented a high biodegradability, with the minimum effluent chemical oxygen demand (COD) amount (35 mg/L). Denitrification kinetics parameters were also analyzed; high fraction (74.5%) of the most readily biodegradable organics (SS) demonstrated that TB treated MSW acidogenic fermentation effluent is a high-quality carbon source for enhancing denitrification. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect