The hydrothermal solution for self-sustaining drinking water purification at point of use
| Autor: | Hanna Graul, Robin Wünsch, Benedikt M. Aumeier, Matthias Wessling, Carina Lackmann, Thomas Wintgens, Henner Hollert, Anne-Katrin Müller |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
0208 environmental biotechnology Ultrafiltration Water supply Portable water purification 02 engineering and technology 010501 environmental sciences 01 natural sciences Water Purification Adsorption Water Supply medicine Turbidity Waste Management and Disposal Effluent 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering business.industry Drinking Water Ecological Modeling Environmental engineering Pollution 020801 environmental engineering Charcoal Environmental science business Groundwater Activated carbon medicine.drug |
| Zdroj: | Water Research. 170:115338 |
| ISSN: | 0043-1354 |
| DOI: | 10.1016/j.watres.2019.115338 |
| Popis: | Decentralized drinking water purification complements water supply in areas with unreliable or absent infrastructure. The exacerbating consequences of climate change in form of droughts and floods force remote households to tap various water sources. Hence, household-based processes must be versatile to cope with e.g. contaminated ground water and turbid surface waters. Purification at household level must be self-sustaining in order to enable independence from continuous supply of power and consumables. In this study, we design a process accordingly and we prove its technical feasibility on pilot scale. The two-step process utilizes gravity-driven ultrafiltration and activated carbon adsorption to purify water, whereas the process regeneration is accomplished by combining Temperature Enhanced Backwash and Temperature Swing Adsorption to clean the membrane and adsorber, respectively. We obtained stable operation over > 40 days with a sustained flowrate of ∼ 5 L h − 1 and consistent product quality (turbidity ≤ 0.2 NTU ) for all relevant water matrices: synthetic ground water, river water and even secondary effluent. We achieved a high removal of the spiked model micropollutant amitrole, environmental endocrine disruptors and bulk dissolved organics of ∼ 93 % , > 65 % and ∼ 69 % , respectively, at the optimal water recovery for river water of ∼ 80 % . In-situ regeneration promises long-term, self-sufficient operation without exhaustion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect