Effect of additional food waste slurry generated by mesophilic acidogenic fermentation on nutrient removal and sludge properties during wastewater treatment
| Autor: | Jialing Tang, Jin Huang, Shengwang Pan, Nengmin Zhu, Yisong Hu, Xiaochang C. Wang, Huu Hao Ngo, Yu You Li, Yunhui Pu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Acidogenesis Environmental Engineering Denitrification Nitrogen Bioengineering Sequencing batch reactor Wastewater 010501 environmental sciences Waste Disposal Fluid 01 natural sciences Bioreactors 010608 biotechnology Waste Water Waste Management and Disposal 0105 earth and related environmental sciences Sewage Renewable Energy Sustainability and the Environment Chemistry Chemical oxygen demand Nutrients General Medicine Pulp and paper industry Carbon Refuse Disposal Food waste Food Fermentation Sewage treatment Biotechnology |
| Zdroj: | Bioresource Technology. 294:122218 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2019.122218 |
| Popis: | © 2019 Elsevier Ltd Fermentation slurry from food waste (FSFW) generated by acidogenic fermentation at mesophilic temperature was utilized to improve the nutrients removal from wastewater. Organic acids (such as lactate and volatile fatty acids) in the FSFW behaved as readily biodegradable carbon sources, while the particulate and macromolecular organics acted as slowly biodegradable carbon sources during denitrification processes. The FSFW dosage significantly influenced the nitrogen removal performance, and a C/N ratio (in terms of chemical oxygen demand to nitrogen ratio) of 8 could achieve complete denitrification in the batch tests. In a sequencing batch reactor (SBR) using FSFW for long-term wastewater treatment, extracellular polymeric substances (EPS) gradually accumulated, sludge particle size significantly increased, and microbial communities were selectively enriched, which contributed to promoting the nitrogen (>80%) and phosphate (90.1%) removal efficiencies. Overall, the FSFW produced by acidogenic fermentation under mesophilic temperature served as an excellent intermediary between FW valorization and wastewater treatment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect