Análise da eficiência da geração de resíduos sólidos no âmbito da gestão portuária : um estudo dos portos marítimos brasileiros

The importance of the port sector in the development of the world economy is undeniable, and Brazil is no different. Therefore, it is extremely important that Brazilian seaports are efficient in the management of cargo handling operations, otherwise the Brazilian productive sector will have a competitive disadvantage in the international market. One of the results of inefficiency in port operations is the generation of solid waste, whose inventory was obtained through diagnostic reports, the result of a partnership between SEP / PR and UFRJ. For this, the Network Two-Stage DEA method was applied in 19 Brazilian seaports, with the purpose of analyzing the efficiency of the ports considering two stages. In the first stage, it analyzed the efficiency of port operations management, which considered infrastructure variables (number of erths, berth extension and storage area) and port operation (number of berths and cargo movement). In the second stage, it analyzed the efficiency of solid waste management, with the operational variables of the previous stage as inputs and the generation of solid waste as an undesirable output. The result evidenced that the port of Salvador was the most efficient of the sample, being the only port efficient in the second stage, which allowed to refute the hypothesis of this work.É inegável a importância do setor portuário no desenvolvimento da economia mundial, e no Brasil não é diferente. Com isso, é de suma importância que os portos marítimos brasileiros sejam eficientes na gestão das operações de movimentação de carga, pois, do contrário, o setor produtivo brasileiro passa a ter uma desvantagem competitiva no mercado internacional. Um dos resultados da ineficiência nas operações portuárias é a geração de resíduos sólidos, cujo inventário foi obtido por meio dos relatórios diagnósticos, fruto da parceria entre a SEP/PR e a UFRJ. Para isto, foi aplicado o método Network Two-Stage DEA em 19 portos marítimos brasileiros, com o intuito de analisar a eficiência dos portos considerando dois estágios. No primeiro estágio analisou a eficiência da gestão das operações portuárias, que considerou variáveis de infraestrutura (quantidade de berços, extensão de cais e área de armazenagem) e da operação portuária (quantidade de atracações e movimentação de carga). No segundo estágio, analisou a eficiência da gestão de resíduos sólidos, tendo as variáveis operacionais do estágio anterior como inputs e a geração de resíduos sólidos como um output indesejável. O resultado evidenciou que o porto de Salvador foi o mais eficiente da amostra, sendo o único porto eficiente no segundo estágio, o que permitiu refutar a hipótese deste trabalho

Impact of Drought on the Life Cycle of Barge Transport

This paper aims to analyze the impact of drought on the life cycle of barge transportation. The LCA method was used to quantify the environmental impact of barge transportation services on the Madeira River/Brazil: Transportation Operation, Barge Fleet, and Waterway Infrastructure. A model for barge convoy formation was developed as a function of river water level variation. From this, the transport operation was simulated, considering the loading of grains from the Madeira River in 2021, as well as the respective fuel consumption and CO2Eq emissions. The results indicate that barge transportation is more harmful to the environment during drought, since only a convoy of nine barges is allowed to navigate, and its energy efficiency is compromised due to the longer travel time and lower loading capacity in one trip. The intense use of this barge convoy implied an increase of 22.25% in CO2Eqemissions when compared to the full river. Doi: 10.28991/CEJ-2022-08-12-02 Full Text: PD

Analysis of efficiency in the generation of waste in general cargo port terminals using DEA

Based on the National Solid Waste Policy, the Brazilian port sector was forced to manage the waste generated in ports and port terminals. From the inventory of waste, it was possible to analyze the efficiency in the generation of waste in port terminals that predominantly handle the general cargo, using the Data Envelopment Analysis (DEA) method. The output-oriented DEA BCC model was adopted. In addition, this work used three analyzes, one general and two peer-to-peer. The result of the general analysis, in which the three variables were considered, presented eight efficient terminals, having one false-efficient terminal. The DMU 18 was the most efficient because it obtained the highest value in the Normalized Compound. In the peer-to-peer analysis, the efficient border was formed by only two DMU's, where the presence of DMU 21 is observed in the three analyzes. Moreover, in one of the peer-to-peer analyzes it was observed that the model attributed the highest value in the Normalized Compound to the DMU 20 that was not efficient. In this case, the composite and normalized composite indicators were disregarded from the analysis, using standard and inverted efficiency indicators. This article includes the identification of the terminals with the best and worst management practices

Analysis of the Performance of Transporting Soybeans from Mato Grosso for Export: A Case Study of the Tapajós-Teles Pires Waterway

The inefficiency of Brazil’s logistics system to handle the outflow of farm products impairs the sector’s performance. From the economic perspective, the high freight rates put the country’s agricultural sector at a competitive disadvantage in the global market. Besides this, the reliance on highway transport causes problems of an environmental (high CO 2 emissions) and social nature (large occurrence of accidents). As an alternative to this dependence, Brazil has an extensive network of actually and potentially navigable rivers that could serve as a key element to improve the performance of the agricultural sector. Therefore, the objective of this study is to analyze the possible influence of the Tapajós-Teles Pires Waterway on the sustainable performance of 19 Brazilian soybean export routes, using data envelopment analysis (DEA). Of these, only three would use the Tapajós-Teles Pires Waterway, which is not yet in operation. The origins of the routes are four soybean-producing centers located in Mato Grosso, the Brazilian state that produces the most soybeans, destined for 12 seaports. The inputs considered are Accident Cost and CO2 Emissions, while the output is Cargo Carried per US$. For this, we use the DEA-VRS (Variable Return Scale) input-oriented model. The results obtained from the DEA model revealed satisfactory performance of the routes using the Tapajós-Teles Pires Waterway from three of the four production centers. In Campo Novo do Parecis, some 16% (471 km) of the route is composed of highways and the rest of the waterway (84%, 1576 km). In Sorriso, only 3% (85 km) of the route consists of highways, while waterway transport is responsible for 97% (2388 km), and in Querência, 24.55% of the route to the Port of Barcarena consists of highways. The use of these routes and the combination of the two transport modes presented the best efficiency indexes, making development of the waterway a key element to improve the outflow of soybeans for export. The results of this study may help Brazilian authorities to define public policies and apply resources to improve the deficiencies of the transportation system, which can lead to a better balance of the Brazilian transportation matrix