8 documents found, page 1 of 1
Biofuel from wastewater-grown microalgae: A biorefinery approach using hydrothe...
Silva, Thiago; de Aguiar do Couto, Eduardo; Assemany, Paula; Costa, Paula; Marques, Paula; Paradela, Filipe; Reis, Alberto; Calijuri, Maria LuciaABSTRACT: Third-generation biofuels from microalgae are becoming necessary for sustainable energy. In this context, this study explores the hydrothermal liquefaction (HTL) of microalgae biomass grown in wastewater, consisting of 30% Chlorella vulgaris, 69% Tetradesmus obliquus, and 1% cyanobacteria Limnothrix planctonica, and the subsequent upgrading of the produced bio-oil. The novelty of the work lies in inte...
Enhancing microalgae biomass production: Exploring improved scraping frequency ...
Silva, Thiago; Pereira, Alexia Saleme Aona de Paula; Ferreira, Jessica; Lorentz, Juliana F.; de Assis, Marilia Luise; Assemany, Paula; Reis, AlbertoABSTRACT: Recently, hybrid systems, such as those incorporating high-rate algal ponds (HRAPs) and biofilm reactors (BRs), have shown promise in treating domestic wastewater while cultivating microalgae. In this context, the objective of the present study was to determine an improved scraping frequency to maximize microalgae biomass productivity in a mix of industrial (fruit-based juice production) and domestic ...
Microalgae in a global world: New solutions for old problems?
Vieira De Mendonça, Henrique; Assemany, Paula; Abreu, Mariana; De Aguiar Do Couto, Eduardo; Martins Maciel, Alyne; Duarte, Renata LopesABSTRACT: The human population blast has brought several problems related with the overconsumption of a wide range of feedstocks and natural resources conducting to their risk of depletion. The consumption of fossil fuels is an example, with increasing levels of exploitation and negative impacts caused by their use. Anthropogenic activities have triggered the over accumulation of many hazardous substances and w...
Energetic valorization of algal biomass in a hybrid anaerobic reactor
Assemany, Paula; Marques, Isabel de Paula; Calijuri, Maria Lúcia; Silva, Teresa Lopes da; Reis, AlbertoThis study evaluated the operation of a hybrid anaerobic reactor fed with algal biomass cultivated in effluent from the brewery industry. Three stages of operation were distinguished during the 72 days of semi-continuous functioning of the reactor: Stage 1 (S1), in which algal biomass was used as substrate; Stage 2 (S2), in which 10% (v/v) of the algal biomass was substituted by olive mill wastewater (OMW); and...
Energetic valorization of algal biomass in a hybrid anaerobic reactor
Assemany, Paula; Calijuri, Maria Lucia; Silva, Teresa Lopes da; Reis, Alberto; Marques, Isabel PaulaABSTRACT: This study evaluated the operation of a hybrid anaerobic reactor fed with algal biomass cultivated in effluent from the brewery industry. Three stages of operation were distinguished during the 72 days of semi-continuous functioning of the reactor: Stage 1 (S1), in which algal biomass was used as substrate; Stage 2 (S2), in which 10% (v/v) of the algal biomass was substituted by olive mill wastewater ...
Combining biotechnology with circular bioeconomy: from poultry, swine, cattle, ...
Ferreira, Alice; Marques, Paula; Ribeiro, Belina; Assemany, Paula; Vieira De Mendonça, Henrique; Barata, Ana; Oliveira, Ana Cristina; Reis, AlbertoABSTRACT: The ability of microalgae to grow in nutrient-rich environments and to accumulate nutrients from wastewaters (WW) makes them attractive for the sustainable and low-cost treatment of WW. The valuable biomass produced can be further used for the generation of bioenergy, animal feed, fertilizers, and biopolymers, among others. In this study, Scenedesmus obliquus was able to remove nutrients from differen...
Biodiesel from wastewater: lipid production in high rate algal pond receiving d...
Assemany, Paula; Calijuri, Maria Lucia; De Aguiar Do Couto, Eduardo; Reis, AlbertoThe production of different species of microalgae in consortium with other micro-organisms from wastewaters may represent an alternative process, to reduce the costs, for obtaining biofuels. The aim of this study was to evaluate the influence of pre-ultraviolet disinfection (UV) in the production of lipids from biomass produced in high rate ponds. Two high rate algal ponds were evaluated: a pond that received d...
Algal biomass production and wastewater treatment in high rate algal ponds rece...
Santiago, Aníbal F.; Calijuri, Maria Lucia; Assemany, Paula; Calijuri, Maria do Carmo; Reis, AlbertoAlgal biomass production associated with wastewater is usually carried out in high rate algal ponds (HRAPs), which are concomitantly used in the treatment of such effluent. However, most types of wastewater have high levels of bacteria that can inhibit the growth of algal biomass by competing for space and nutrients. The objective of this study was to assess the influence of ultraviolet (UV) pre-disinfection on...