Ivã Guidini Lopes

Swedish University of Agricultural Sciences | SLU · Department of Energy and Technology

Inadequate organic waste management have detrimental impact on the environment and on public health. Black soldier fly (BSF) larvae composting is a biological treatment for biodegradable waste that align with circular economy principles. The bioconversion efficiency of bio-waste into larval biomass is influenced by various factors, such as substrat...

The offer and consumption of fish and other aquatic organisms in Brazil comprise a great complexity of interacting factors, from the origin and production of these goods, to their processing and marketing. Unexpected factors such as the COVID-19 pandemic might contribute for increasing the complexity of such interactions and shift consumption patte...

Sustainability, circularity, and Zero Waste policies are timely concepts for policy development and strategies in the European Union (EU) and other global regions. Insects can likely become key players in the bioconversion of waste to valuable material and promise one solution to achieve diverse societal goals. Insects further present strategic opp...

Na altura em que a população mundial acaba de atingir os oito biliões (assumindo a escala curta, corrente na maioria dos países europeus e dos países lusófonos – com exceção do Brasil – ou seja, oito milhares de milhões), dois problemas cruciais assumem particular acuidade: O crónico défice da produção de alimentos à escala global e a crescente pre...

The growing demand for broilers production is related to environmental and economic impacts worldwide, increasing the urgency to find alternative feed ingredients. Recent studies indicated the productive potential of some insect species, which may serve as a protein and lipid source for animal feeding, as the case of black soldier fly (BSF) larvae...

The relative agronomic performance of two organic fertilizers - effluents from intensive cattle farming, after composting either by traditional aerobic methods (compost) or by bio-digestion by larvae of the black soldier fly (Hermetia illucens, BSF) (frass) - in the growth of annual ryegrass (Lolium multiflorum L.) on a sandy soil was evaluated. Fo...

Traditional farming practices are highly dependent on chemical fertilizers, which might deteriorate soils when used in the long term. In face of the increasing generation of biodegradable materials worldwide, the adoption of technologies that harvest nutrients from waste complies with the concepts of a circular economy. This study evaluated the eff...

The aim of this study was to evaluate the potential agronomic value of black soldier fly larvae frass (BSFF) as an organic fertiliser in short-cycle crops, using lettuce as the test plant. Treatments consisted in applying different fertilisers (BSFF and mineral) at different doses and combinations. The experiment was carried out for 42 days and pla...

Poster presented at SETAC Europe 32nd Annual Meeting 2022, involved in the project ENTOSAFE.

Inadequately treated biodegradable waste is considered an environmental, social and economic threat worldwide, which call for great attention. Waste treatment with larvae of the black soldier fly (BSF, Hermetia illucens) complies with the concepts of circular economy, as it enables the transformation of these wastes into marketable products, closin...

Estimating mineralization rates is one of the best ways to predict N availability over time. However, different methods can lead to distinct predictions, especially when different production systems are used. The aim of this study was to compare biological and chemical methods commonly used to estimate the potentially available N in a soil cultivat...

Cartilha técnica sobre a compostagem de resíduos animais da aquicultura e aplicação dos compostos orgânicos obtidos com o processo em culturas agrícolas Technical book about the composting process of animal wastes from aquaculture production and the application of composts in agriculture

This study evaluated the impact of feeding regimes on process performance and inactivation of microorganisms during treatment of aquaculture waste with black soldier fly (BSF) larvae. In three treatments (T1–T3), a blend of reclaimed bread and aquaculture waste was used as substrate for BSF larvae. In T1, the substrate was inoculated with four subt...

Ethanol production is responsible for the generation of significant amounts of vinasse, a liquid organic waste that contains high concentrations of nitrogen (N). Its direct application in the soil is widely performed in agriculture, but the vinasse N transformations that occurs in the soil remains poorly understood. This study aimed at evaluating N...

Aquaculture is a fast-growing activity that is generating increasing volumes of organic waste such as fish carcasses, which must be managed. In a study evaluating black soldier fly (BSF) larvae composting of this waste stream, we tested 21 combinations of reclaimed bread waste and aquaculture waste (with replacement increments of 5%). The best trea...

Agro-industrial wastes are commonly used as nitrogen sources in agriculture, and its availability depends on the dynamics of nitrogen mineralization. The pH has great effects on soil nitrogen dynamics; thus, we hypothesized that the increase of pH would increase nitrogen mineralization and nitrification. The aim of this study was to evaluate the ef...

Soil pH is one of the properties that mostly influences nitrification rates, and can be used as a tool for controlling this process, seen that depending on its extent it may lead to nitrogen (N) losses and subsequent contaminations. The aims of this study were to evaluate mineralization and nitrification of two soils at different pH levels. The exp...

Nutritional deficiencies during a fish’s larval stage may lead to the emergence of skeletal anomalies, since essential nutrients are involved in the osteogenic process. The aim of this study was to evaluate the effects of two weaning periods on appearance of skeletal anomalies and growth and pacu larvae (Piaractus mesopotamicus) during its initial...

Aquaculture is a fast growing activity in Brazil and around the world, which generates large amounts of waste from fingerling production to the final consumer. Among several possibilities for the management of these wastes, windrow composting stands out as a simple and low-cost method. In this study, sixteen composting piles were assembled with woo...

Climate changes driven by greenhouse gas emissions have been occurring in an accelerated degree, affecting environmental dynamics and living beings. Among all affected biomes, the Amazon is particularly subjected to adverse impacts, such as temperature rises and water acidification. This study aimed to evaluate the impacts of predicted climate chan...

The GABA-A receptor agonist midazolam is a compound widely used as a tranquilizer and sedative in mammals and reptiles. It is already known that this benzodiazepine produces small to intermediate heart rate (HR) alterations in mammals, however, its influence on reptiles’ HR remains unexplored. Thus, the present study sought to verify the effects of...

This technical article have informations about the generation and management of organic wastes in fish farming activities.

The dynamics of fish supply for the world population is passing through a moment of decreasing fisheries and increasing aquaculture production, which in Brazil is favored by wide availability of water resources, great variety of species, favorable climate and by increased demand for this protein source. Nevertheless, fish consumption by Brazilian p...