11 documents found, page 1 of 2
Phosphorus removal from urban wastewater through adsorption using biogenic calc...
Santos, Andreia F.; Lopes, Daniela V.; Alvarenga, Paula; Gando-Ferreira, Licínio M.; Quina, Margarida J.Phosphorus (P) removal from urban wastewater is increasingly relevant in the wastewater treatment sector. The present work aims to contribute to the study of the adsorption process as a P removal technology. Biogenic calcium carbonate from industrial eggshell waste prepared by milling and calcination was used as an adsorbent. Batch adsorption experiments were conducted using real wastewater with 40 mg P/L (orth...
Nutrient recovery via struvite precipitation from wastewater treatment plants: ...
Santos, Andreia F.; Mendes, Luísa S.; Alvarenga, Paula; Gando-Ferreira, Licínio M.; Quina, Margarida J.Phosphorus (P) is a critical element for life, and wastewater treatment systems can be strategic points for its recovery, thereby avoiding eutrophication pollution in nature. The aim of this research was to investigate P recovery via struvite, namely in terms of the influence of operating parameters, coexisting interfering ions, and seeding. This paper focuses on synthetic solutions, although an assessment was ...
An innovative two-step methodology for struvite recovery from wastewater with h...
Santos, Andreia F.; Abreu, Raquel L.; Alvarenga, Paula; Gando-Ferreira, Licínio M.; Quina, Margarida J.Recovering phosphorus (P) from wastewater is a central strategy for environmental protection and sustainable development, with a contribution to resource scarcity issues. This research aims to fill a gap in the understanding of selective calcium removal prior to struvite precipitation to increase its purity. A previous assessment showed that the stream before anaerobic digestion is the best hot spot for precipi...
Urban Wastewater as a Source of Reclaimed Water for Irrigation: Barriers and Fu...
Santos, Andreia F.; Alvarenga, Paula; Gando-Ferreira, Licínio M.; Quina, Margarida J.Water resources are under pressure worldwide, resulting in scarcity and deterioration of freshwater quality. According to European directives, we could reduce the pressure on water resources in urban areas by increasing the reuse of treated wastewater, reducing the impact on water bodies, and promoting water recycling through multiple uses of urban wastewater. Besides the need to address water supply challenges...
Urban Wastewater as a Source of Reclaimed Water for Irrigation: Barriers and Fu...
Santos, Andreia F.; Alvarenga, Paula; Gando-Ferreira, Licínio M.; Quina, Margarida J.Water resources are under pressure worldwide, resulting in scarcity and deterioration of freshwater quality. According to European directives, we could reduce the pressure on water resources in urban areas by increasing the reuse of treated wastewater, reducing the impact on water bodies, and promoting water recycling through multiple uses of urban wastewater. Besides the need to address water supply challenges...
Greenhouse Assays with Lactuca sativa for Testing Sewage Sludge-Based Soil Amen...
Santos, Andreia F.; Veríssimo, Ana M.; Brites, Pedro; Baptista, Filipe M.; Góis, José C.; Quina, Margarida J.Sustainable agriculture practices within the guidelines of nutrient recycling and the circular economy must be increasingly promoted. This work aims to evaluate the performance of dried sewage sludge (DSS), green liquor dregs mixed with sewage sludge (DSSA), raw sewage sludge, and commercial organic fertilizer control, using a short-term agronomic assessment with lettuce crop (Lactuca sativa) in greenhouse cond...
Agronomic valorization of sewage sludge: The potential of thermal drying to ach...
Santos, Andreia F.; Alvarenga, Paula; Gando-Ferreira, Licínio M.This work aims to contribute to the discussion of using a waste (sewage sludge) to obtain a valuable product (organic-rich fertilizer), based on a circular economy perspective. The compo- sition of sewage sludge (SS) was considered, highlighting important characteristics as raw ma- terial for fertilizer production (e.g., macronutrients, microbiological contamination, phytotoxicity). Particularly, the biological...
Urban wastewater as a source of reclaimed water for irrigation: barriers and fu...
Santos, Andreia F.; Alvarenga, Paula; Gando-Ferreira, Licínio M.; Quina, Margarida J.Water resources are under pressure worldwide, resulting in scarcity and deterioration of freshwater quality. According to European directives, we could reduce the pressure on water resources in urban areas by increasing the reuse of treated wastewater, reducing the impact on water bodies, and promoting water recycling through multiple uses of urban wastewater. Besides the need to address water supply challenges...
Bioenergy Production through Mono and Co-Digestion of Tomato Residues
Almeida, Patrícia V.; Rodrigues, Rafaela P.; Teixeira, Leonor M.; Santos, Andreia F.; Martins, Rui C.; Quina, Margarida J.The agro-industry of tomato generates three types of residues: ripe rotten tomato (unfit for consumption) (RT), green (unripe) tomato (GT), and tomato branches including leaves and stems (TB). These materials are commonly wasted or used as feed for livestock. Energy production through anaerobic digestion is an alternative way to manage and simultaneously valorise these materials. Initially, the operating condit...
From wastewater to fertilizer products: Alternative paths to mitigate phosphoru...
Santos, Andreia F.; Almeida, Patrícia V.; Alvarenga, Paula; Gando-Ferreira, Licínio M.; Quina, Margarida J.Phosphorus (P) is a non-renewable resource, irreplaceable for life and food production, and currently considered a Critical Raw Material to the European Union (EU). Due to concerns about the rate of consumption and limited reserves in countries with sensitive geopolitical contexts, it is urgent to recover P from urban and industrial flows. Indeed, the municipal wastewater treatment plants (WWTP) are considered ...