48 documents found, page 1 of 5
A pilot-scale evaluation of residual sludge quality in a worm-sludge treatment ...
Gholipour, Amir; Fragoso, Rita; Galvão, Ana; Duarte, ElizabethA pilot-scale study on sludge treatment reed beds investigated the combined effects of earthworms and Arundo donax on sewage sludge dewatering and residual sludge quality. Four units were tested: one planted with earthworms, one planted without earthworms, one unplanted with earthworms, and one control, each unit replicated. Over a year, 24 cycles of sludge (dry and volatile solid contents of 24.71 g.L 1, and 1...
Evaluating drained water quality in a pilot worm-sludge treatment reed bed plan...
Gholipour, Amir; Fragoso, Rita; Galvão, Ana; Duarte, ElizabethThis study evaluated the impact of incorporating earthworms (Eisenia fetida) on the drained water quality from a sludge treatment reed bed. The experiment encompassed four setups of treatment beds in two replicates: planted with Arundo donax and addition of earthworms, planted without earthworms, unplanted with earthworms, and treatment bed without plants nor earthworms as control. The units were fed every two ...
Anaerobic co-digestion of municipal mixed sludge and mango peel biowaste: Perfo...
Silva, Inês; Gouveia, Bruno; Azevedo, André; Fernandes, Edgar C.; Duarte, ElizabethIn an urban context, municipal mixed sludge (MMS) and fruit and vegetable waste (FVW) are becoming the major organic solid wastes in human society. Thus, anaerobic digestion as a low carbon energy strategy to minimize their environmental polluting risk was studied. To overcome the drawbacks of anaerobic digestion of MMS, an alternative approach is proposed, involving the addition of increasing proportions of ma...
Mango peel nanofiltration concentrates to enhance anaerobic digestion of slurry...
Fragoso, Rita; Silva, Inês; Gomes, Tânia; Martins, Cátia; Bengala Freire, João; Duarte, Elizabeth; Macedo, AntóniaThe environmental impact of biowaste generated during animal production can be mitigated by applying a circular economy model: recycling, reinventing the life cycle of biowaste, and developing it for a new use. The aim of this study was to evaluate the effect of adding sugar concentrate solutions obtained from the nanofiltration of fruit biowaste (mango peel) to slurry from piglets fed with diets incorporating ...
Water management toward regenerative wineries
Oliveira, Margarida; Saraiva, Artur; Lambri, M.; Rochard, J.; Fragoso, R.; Romanini, E.; Hipólito, P.; Ettore, C.; Duarte, ElizabethWine producers are now fully aware of the water-energy nexus, given the challenges created by climate change. By identifying potential environmental impacts of the wine industry, related to water and fossil energy use, wineries are taking action to improve their performance. This chapter reviews a set of technologies and strategies that can lead wineries to implement a regenerative approach, minimizing resource...
Moringa as a household water purification method – community perception and pil...
Bancessi, Aducabe; Teodósio, Rosa; Duarte, Elizabeth; Baldé, Aladje; Catarino, Luís; Nazareth, TeresaBackground: Public perceptions of water-related issues are still under-researched topics. The current paper intends to explore a local community’s perceptions regarding household water purification (HWP) strategies, namely before and after trying a new method: moringa seeds powder (moringa-teabag). Methods: In September 2020, six focus group discussions (N = 65) assessing perceptions about the usefulness of Mor...
Sludge Treatment Reed Bed under different climates: A review using meta-analysis
Gholipour, Amir; Fragoso, Rita; Duarte, Elizabeth; Galvão, AnaSludge Treatment Reed Beds (STRBs) have been used worldwide over the past few decades. This review aims to overarchingly identify and appraise the currently available knowledge of STRB technology and discern climatic patterns through Meta-Analysis (MA). We systematically searched Google Scholar, Scopus, and Web of Science databases (up to Dec 2021) via a combination of keywords to identify English-language stud...
Dual-pool, three-phase kinetic model of anaerobic digestion in batch mode
Gouveia, Bruno; Duarte, Elizabeth; Santos, Aires; Fernandes, EdgarThe ability of anaerobic digestion to create value from waste gives it an important role in reducing greenhouse gas emissions and in the transition to a circular economy. For a better understanding of the digestion process and in order to reduce the number of time-consuming batch tests, an analytical model was developed to describe the kinetics of biogas production. Assuming that the organic fraction of the sub...
Membrane Technology for Valorization of Mango Peel Extracts
Macedo, Antónia; Gomes, Tânia; Ribeiro, Carlos; Moldão, Margarida; Duarte, Elizabeth; Delgado Alves, VitorMango peel is rich in nutritional and functional compounds, such as carbohydrates, dietary fibers, proteins, and phenolic compounds, with high potential to be applied in the food industry. Most of the investigation about recovery of bioactive compounds from fruit bioproducts involves extraction techniques and further separation of target compounds. There is still a lack of information about the potential of mem...
Moringa as a household water purification method – community perception and pil...
Bancessi, Aducabe; Teodósio, Rosa; Duarte, Elizabeth; Baldé, Aladje; Catarino, Luís; Nazareth, TeresaBackground Public perceptions of water-related issues are still under-researched topics. The current paper intends to explore a local community’s perceptions regarding household water purification (HWP) strategies, namely before and after trying a new method: moringa seeds powder (moringa-teabag). Methods In September 2020, six focus group discussions (N = 65) assessing perceptions about the usefulness of Morin...