42 documents found, page 1 of 5

Ecotoxicological risk assessment as a decision tool for the valorisation of win...

A simple and economical process consisting in the precipitation with slaked lime (Ca(OH)2) was applied to winery wastewater. The process not only removed organic matter and other contaminants but also simultaneously captured atmospheric CO2. In order to help the wine industry to advance to the objective of circular economy, treatment byproducts (supernatant and sludge) have been reused for agricultural purposes...

Pretreated Agro-Industrial Effluents as a Source of Nutrients for Tomatoes Grow...

In a zero-waste approach for the agro-industrial sector, this study aimed to evaluate the reuse of cheese whey wastewater (chemical oxygen demand = 2.1 g L−1) pretreated by immediate one-step lime precipitation followed by natural carbonation as a nutritive solution for tomato production in hydroponic systems. Pretreated effluent, diluted with groundwater (1:6) and supplemented with nutrients, was utilized to i...

Pretreated Agro-Industrial Effluents as a Source of Nutrients for Tomatoes Grow...

In a zero-waste approach for the agro-industrial sector, this study aimed to evaluate the reuse of cheese whey wastewater (chemical oxygen demand = 2.1 g L−1) pretreated by immediate one-step lime precipitation followed by natural carbonation as a nutritive solution for tomato production in hydroponic systems. Pretreated effluent, diluted with groundwater (1:6) and supplemented with nutrients, was utilized to i...

Reuse of Pretreated Agro-Industrial Wastewaters for Hydroponic Production of Le...

The utilization of agro-industrial wastewaters (AIWWs), pretreated by immediate one-step lime precipitation + natural carbonation, as a nutritive solution for the hydroponic production of lettuce was evaluated. The AIWWs studied were olive mill wastewater (OMW), winery wastewater (WW), and cheese whey wastewater (CWW). Lettuces (Lactuca sativa L. var. crispa) were grown in a closed nutrient film technique hydro...

Estudo da aplicação de imagens de satélite NDVI como ferramenta para a gestão d...

Manual treatment of urban wastewater by chemical precipitation for production o...

An urban wastewater treatment system was developed in Portugal for posterior in situ feasibility testing at the Bulgarian Antarctic Base, using its domestic wastewater. The aim of this system was to develop a low cost, integrated approach for wastewater treatment and production of nutrient solutions (NS) for hydroponic cultivation of lettuce (Lactuca sativa var. crispa) in Antarctic stations, or any other place...

Aproveitamento dos resíduos gerados pela produção de framboesa em substrato par...

O crescimento da área de produção de framboesa em hidroponia no Sul de Portugal tem contribuído para o aumento da quantidade resíduos vegetais resultantes do sistema de produção. Devido ao elevado volume de resíduos gerado, estes acumulam-se, criando um problema de gestão dos resíduos aos agricultores. Atualmente, a legislação nacional recomenda aos agricultores a reciclagem ou reutilização dos substratos, ince...

Polinização em pereira ‘Rocha’

Pretendeu-se com o presente estudo verificar a eficácia da utilização de abelhões (Bombus terrestris L.) na polinização da pereira ‘Rocha’. O delineamento experimental do ensaio foi realizado em blocos casualizados com 11 árvores por repetição. A partir da colmeia de abelhões e de 10 em 10 metros de distância foram sinalizadas as árvores a observar. Em cada uma delas foram marcados quatro corimbos (um por quadr...

Cultura da Alface em substrato utilizando uma solução nutritiva proveniente de ...

Cultura da alface utilizando três substratos e águas residuais provenientes de uma queijaria, após tratamento, sendo usadas como solução nutritiva.

A cultura do marmeleiro no Alentejo

Adaptabilidade das cultivares de marmeleiro Portugal e Gigante de Vranja à região do Alentejo