Anaerobic and photocatalytic treatments of post-hydrothermal liquefaction wastewater using H2O2
| Autor: | Rogers Ribeiro, Alessandra Lopes de Oliveira, Zhidan Liu, Diana Quispe-Arpasi, Giovana Tommaso, Na Duan, Michael Stablein, Raquel de Souza, Haifeng Lu, Yuanhui Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Spirulina (genus)
chemistry.chemical_classification Cyanobacteria Environmental Engineering biology Renewable Energy Sustainability and the Environment Chemistry 020209 energy Bioengineering 02 engineering and technology 010501 environmental sciences biology.organism_classification Pulp and paper industry 01 natural sciences Hydrothermal liquefaction Anaerobic digestion Wastewater 0202 electrical engineering electronic engineering information engineering Photocatalysis Organic matter Waste Management and Disposal Anaerobic exercise 0105 earth and related environmental sciences |
| Zdroj: | Bioresource Technology Reports. 3:247-255 |
| ISSN: | 2589-014X |
| Popis: | Hydrothermal liquefaction (HTL) of cyanobacteria is a promising process for energy generation. However, post-HTL wastewater (PHWW) contains high amounts of organic matter and toxic compounds. This study investigated photocatalysis and anaerobic digestion (AD) for the treatment of PHWW from Spirulina conversion. H2O2 was used as an external oxidant in the photocatalysis or as a pretreatment in the AD process. The effect of different concentrations of H2O2 was evaluated. Greater CH4 production and higher COD reduction were observed when pre-treated PHWW was used. In the photocatalytic treatment, color and COD reduction reached 93.1% and 23.4%, respectively, with the addition of H2O2. When a combination of the oxidative pretreatment and AD was applied, a maximum energy recovery of 66.7% was reached, while the photocatalysis reached a maximum of 61.5%. Use of the best conditions with proper dilutions resulted in higher growths of the Spirulina cultivation compared to that with conventional algal media. |
| Databáze: | OpenAIRE |
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