Techno-economic optimization of phosphorous recovery in an algal-based sewage treatment system
| Autor: | S.P. Munasinghe-Arachchige, H.M.K. Delanka-Pedige, I.S.A. Abeysiriwardana-Arachchige, Nagamany Nirmalakhandan |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Environmental Engineering Sewage Renewable Energy Sustainability and the Environment Temperature Biomass Techno economic Bioengineering Phosphorus General Medicine 010501 environmental sciences Pulp and paper industry 01 natural sciences Hydrothermal liquefaction 010608 biotechnology Biochar Environmental science Process optimization Sewage treatment Leaching (metallurgy) Waste Management and Disposal Effluent 0105 earth and related environmental sciences |
| Zdroj: | Bioresource technology. 332 |
| ISSN: | 1873-2976 |
| Popis: | Previous reports have documented the technical viability of an algal pathway for treating primary effluent and recovering its phosphorus-content (P) via hydrothermal liquefaction (HTL) of the resulting biomass. In this pathway, leaching P from HTL-derived biochar was found as the critical step impacting the economics of P-recovery. As such, a process model was developed in the current study to optimize P leaching from biochar as a function of five parameters. Model predictions under various conditions agreed well with measured data (r2 = 0.93; n = 184). The validated process model was then integrated with a cost model to establish the following conditions as optimal for leaching P from biochar: batch leaching time of 72 h; eluent NaOH concentration of 0.5 M; eluent-to-biochar ratio of 20; temperature of 60 °C; and provision of mixing. Under these conditions, 73.5% of P from biochar could be recovered at $5.98/kg P. |
| Databáze: | OpenAIRE |
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