Nutrient-energy-water recovery from synthetic sidestream centrate using a microbial electrolysis cell - forward osmosis hybrid system
| Autor: | Zhen He, Mohan Qin, Shiqiang Zou, Yann Moreau |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Stripping (chemistry)
Waste management Hydrogen Renewable Energy Sustainability and the Environment Chemistry Strategy and Management 0208 environmental biotechnology Forward osmosis chemistry.chemical_element 02 engineering and technology Building and Construction 010501 environmental sciences 01 natural sciences Industrial and Manufacturing Engineering 020801 environmental engineering chemistry.chemical_compound Struvite Microbial electrolysis cell Ammonium 0105 earth and related environmental sciences General Environmental Science Hydrogen production Resource recovery |
| Zdroj: | Journal of Cleaner Production. 154:16-25 |
| ISSN: | 0959-6526 |
| DOI: | 10.1016/j.jclepro.2017.03.199 |
| Popis: | Recovery of nutrient, water, and energy from high-strength sidestream centrate offers benefits such as reusable resource, minimized discharge and cost-savings in mainstream treatment. Herein, a microbial electrolysis cell - forward osmosis (MEC-FO) hybrid system has been investigated for integrated nutrient-energy-water (NEW) recovery with emphasis on quantified mass balance and energy evaluation. In a closed-loop mode, the hybrid system achieved recovery of 54.2 ± 1.9% of water (70.4 ± 2.4 mL), 99.7 ± 13.0% of net ammonium nitrogen (8.99 ± 0.75 mmol, with extended N2 stripping), and 79.5 ± 0.5% of phosphorus (as struvite, 0.16 ± 0.01 mmol). Ammonium loss primarily from reverse solute flux was fully compensated by the reclaimed ammonium under 6-h extended N2 stripping to achieve self-sustained FO process. The generated hydrogen gas could potentially cover up to 28.7 ± 1.5% of total energy input, rendering a specific energy consumption rate of 1.73 ± 0.08 kWh m−3 treated centrate, 0.57 ± 0.04 kWh kg−1 COD, 1.10 ± 0.05 kWh kg−1 removed NH4+-N, 1.17 ± 0.06 kWh kg−1 recovered NH4+-N, or 5.75 ± 0.54 kWh kg−1 struvite. Recycling of excess Mg2+ reduced its dosage to 0.08 kg Mg2+ kg−1 struvite. These results have demonstrated the successful synergy between MEC and FO to achieve multi-resource recovery, and encouraged further investigation to address the challenges such as enhancing hydrogen production, reducing nutrient loss, and optimizing MEC-FO coordination towards an energy-efficient NEW recovery process. |
| Databáze: | OpenAIRE |
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