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- A Combined Vermifiltration-Hydroponic System for Swine Wastewater TreatmentPublication . Ispolnov, Kirill; Aires, Luis M. I.; Lourenço, Nídia D.; Vieira, Judite S.Intensive swine farming causes strong local environmental impacts by generating effluents rich in solids, organic matter, nitrogen, phosphorus, and pathogenic bacteria. Insufficient treatment of hog farm effluents has been reported for common technologies, and vermifiltration is considered a promising treatment alternative that, however, requires additional processes to remove nitrate and phosphorus. This work aimed to study the use of vermifiltration with a downstream hydroponic culture to treat hog farm effluents. A treatment system comprising a vermifilter and a downstream deep-water culture hydroponic unit was built. The treated effluent was reused to dilute raw wastewater. Electrical conductivity, pH, and changes in BOD5, ammonia, nitrite, nitrate, phosphorus, and coliform bacteria were assessed. Plants were monitored throughout the experiment. Electrical conductivity increased due to vermifiltration; pH stayed within a neutral to mild alkaline range. Vermifiltration removed 83% of BOD5, 99% of ammonia and nitrite, and increased nitrate by 11%. Hydroponic treatment removed BOD5 (63%), ammonia (100%), nitrite (66%), nitrate (27%), and phosphorus (47% total and 44% dissolved) from vermifiltered water. Coliforms were reduced by vermifiltration but recovered in the hydroponic unit. Plants showed the ability to grow on vermi-filtered wastewater, although requiring nutrient supplementation. Vermifiltration combined with hydroponics is a promising treatment for swine wastewater, although optimization will be needed for a sustainable real-scale implementation.
- Participatory Co-design: Approaches to Enable People Living with Challenging Health Conditions to Participate in Design ResearchPublication . Neves, S.; Macdonald, A.; Poole, M.; Dening, K. HarrisonPeople are living longer and are affected by challenging chronic, lifestyle- and age-related conditions such as dementia and stroke. The increasing number of people living with challenging health conditions highlights social concerns and their implications for the successful delivery of healthcare services. Research on improving dementia care [Alzheimer’s Disease International (2016) World Alzheimer Report 2016: Improving healthcare for people living with dementia: coverage, quality and costs now and in the future. Alzheimer’s Disease International, London] shows a need to involve people living with dementia, their families, and health and social care professionals when designing improvements to their healthcare services. In addition, involving patients recovering from stroke in discussions about rehabilitation services has been considered important to enable making decisions that better address their health care needs [Kristensen HK, Tistad M, Koch LV, Ytterberg C (2016) The importance of patient involvement in stroke rehabilitation. PLOS One 11(6). 10.1371/journal.pone.0157149]. This paper presents two case studies of a participatory co-design approach used to engage people; (a) living with dementia, and (b) recovering from stroke in design research, where co-design-led methods were used to enable participation. The paper describes the importance of each of the roles of—and relationships between—individuals involved in the participatory co-design research process and how people living with challenging health conditions are enabled to participate in a form of three-way relationship. It discusses lessons learned, reflections and recommendations for a new collaborative model for people living with challenging health conditions engagement to enable a more equal and reciprocal partnership for participation in design research into healthcare improvements.