Treatment and reuse of domestic greywater through green walls

• DOI: 10.5194/egusphere-egu2020-818
• Publication Date: 2020-03-09T12:31:46Z
• Authors: Elisa Costamagna; Fulvio Boano; Alice Caruso; Silvia Fiore; Marco Chiappero; Ana Galvao; Joana Pisoeiro; Anacleto Rizzo; Fabio Masi
• Keywords: Greywater; Laundry

<p>The principles of circular economy and sustainability involve also water management. Since both scarcity demand are increasing, wastewater reuse represents a necessary element to preserve the environment while guaranteeing human development. Greywater is amount that more suitable for purposes: it comes from sinks, showers, bath tubes laundry. has low pollutant concentration developed countries generate high volumes everyday.</p><p>Nature-based solutions well suited greywater treatment purposes thanks their environmental energetic advantages. In fact, these green systems have energy consumption (that means CO<sub>2</sub> emissions), improve quality air (e.g. capturing CO<sub>2</sub>), reduce heat island promote biodiversity. However, efficiency in treating needs be deeply investigated order couple efficacy with lack space urban areas.</p><p>In this study we realized pilot system treat through walls, exploit unused surfaces buildings areas, increasing resilience as recommended Sustainable Development Goal 11 (Make cities settlements inclusive, safe, resilient sustainable) UN 2030 Agenda. Our innovative produces treated can reused non-potable gardening toilet flushing), driving reduction potable our houses.</p><p>In guarantee aesthetic requirements, selected three types evergreen plants able survive great per day. We prepared different porous media mixes evaluate effects additives on common used usual walls. built six modular panels replicates mix, assess statistical variability results. Each panel four independent columns pots. column contains mix planted same sequence plant species. daily fed each around 100 L synthetic monitored parameters BOD, COD, DO, Nitrogen, Phosphorus, E. coli).</p><p>In first phase evaluated differences performance among mixes. Removal exhibits some depending considered parameter but general results show statistically significant between configurations. second consider performances along column. Preliminary decrease pollution after line pots already. summary, concentrations at outlet respect most guidelines many without any other treatment.</p>