scholarly journals Waste-to-biomethane Concept Application: A Case Study of Valmiera City in Latvia

2015 ◽  
Vol 15 (1) ◽  
pp. 48-58 ◽  
Author(s):  
Aiga Barisa ◽  
Ilze Dzene ◽  
Marika Rosa ◽  
Kristine Dobraja
Keyword(s):  
Air Quality ◽  
Waste Management ◽  
Negative Impact ◽  
Biogas Production ◽  
Sustainable Urban Development ◽  
Urban Systems ◽  
Transport Sector ◽  
Fermentation Technology ◽  
Wet Fermentation

Abstract The current needs of sustainable urban development are rising. As the transport sector expands, emissions continue to rise. Due to their negative impact on human health and the environment, air quality requirements are becoming more and more stringent. At the same time, the amount of waste is increasing. Europe Union policies attempt to relieve the pressure that these two stressors place on urban systems as they themselves expand. Today different solutions are available to decrease greenhouse gas emissions, increase air quality and improve waste management systems. Among them, waste-to-biomethane for use in urban systems deserves more attention. The paper focuses on application of the concept of waste-to-biomethane and the case study of Valmiera is evaluated. The results show that the application of the waste-to-biomethane strategy can contribute to a complete substitution of diesel fuel in urban buses and gives savings of around 1,000 tCO2/year. The price of the biomethane was found to be the most sensitive input factor. It is suggested that it should not exceed 0.40 EUR/Nm3 for a fuel conversion project of a fleet of 10 vehicles. Such a price can be ensured, if dry fermentation technology is chosen for biogas production. However, from the sustainability perspective, wet fermentation is more preferable due to the introduction of a source-separated organic waste management system in the region and higher gas yields. Introduction of this alternative requires additional funds which is a question of policy-level decisions.

scholarly journals The Impact of COVID-19 on Highway Traffic and Management: The Case Study of An Operator Perspective

2021 ◽  
Vol 13 (9) ◽  
pp. 5320
Author(s):  
Carlos Oliveira Cruz ◽  
Joaquim Miranda Sarmento
Keyword(s):  
Negative Impact ◽  
Health And Safety ◽  
Modern Society ◽  
Urban Systems ◽  
Highway Traffic ◽  
Transportation Services ◽  
Service Disruption ◽  
Multidisciplinary Perspective ◽  
The Impact

The COVID-19 pandemic created an enormous disruption to the everyday life of the modern society. Among the various urban systems, transportation services were among those that suffered the most significant impacts, particularly severe in the case of highways. This paper addresses the challenges and responses to the pandemic from a private highway operator’s perspective and from a multidisciplinary perspective. Highway operators faced two main challenges: on one hand, the need to cope with the potential disruption caused by the pandemic and a national lockdown for almost three months, the provision of road services, and the requirement to ensure the proper operation and maintenance, and on the other hand, the strong negative impact of the pandemic on levels of traffic. Our case study shows that the operator’s management response in question is essentially characterised by being a first response to short term impacts while balancing for workers health and safety, engineering and management, internal business management, and overall economic impact. Highway operators were hardly prepared for such an event and became more focused on prioritising their employees and clients’ safety to avoid service disruption. Regarding levels of traffic, the pandemic has had severe effects, although to a varying degree, depending on the different types of vehicles (heavy, light, passenger, freight, among other types of vehicles) and the location of highways (coastal vs. interior). The lessons learnt can be valuable in future disruptive events and for other highway concession operators.

scholarly journals Multiobjective Optimization Model for Sustainable Waste Management Network Design

2019 ◽  
Vol 2019 ◽  
pp. 1-15 ◽  
Author(s):  
Sun Olapiriyakul ◽  
Warut Pannakkong ◽  
Warith Kachapanya ◽  
Stefano Starita
Keyword(s):  
Multiobjective Optimization ◽  
Waste Management ◽  
Optimization Model ◽  
Negative Impact ◽  
Cost Effective ◽  
Management Systems ◽  
Large Share ◽  
Rapid Urbanization ◽  
Transportation Routes

Inefficient or poorly planned waste management systems are a burden to society and economy. For example, excessively long waste transportation routes can have a negative impact on a large share of the population. This is exacerbated by the rapid urbanization happening worldwide and in developing countries. Sustainability issues should be accounted for at every stage of decision making, from strategic to daily operations. In this paper, we propose a multiobjective optimization model to design a cost-effective waste management supply chain, while considering sustainability issues such as land-use and public health impacts. The model is applied to a case study in Pathum Thani (Thailand) to provide managerial insights.

scholarly journals COMPARISON OF WASTE GENERATION RATE IN DIFFERENT SIZE OF HOTELS (CASE STUDY OF NORTH CYPRUS)

2020 ◽  
Vol 8 (4) ◽  
pp. 701-722
Author(s):  
Soolmaz AZARMI ◽  
Roozbeh VAZIRI ◽  
Mehmet Necati CİZRELİOĞULLARI
Keyword(s):  
Waste Management ◽  
Management Practices ◽  
Negative Impact ◽  
Management Practice ◽  
Generation Rate ◽  
Waste Generation ◽  
High Season ◽  
Waste Generation Rate ◽  
Waste Management Practices

Waste management in hotels has a significant role in reducing the negative impact on the economy and environment. The goal of this study was to discover hotel sector waste (HSW) by quantitative analysis of HSW in different size of hotels. The SPSS software was employed to predict the average HSW generation rate using nationality, type of waste, season, accommodation type, and type of waste management practices as predictors. The results showed that during lean season 2063.4 kg and high season 4160 kg. In the sampled accommodation, also during the lean season, the large hotels waste generation rate was (66.7%), medium hotels (19.4%), and small hotels (13.9%) and in high season HSW generation increase around (45%). From the total amount of waste generated in the sampled accommodation, 36% generated by the kitchen, and in other section, 7% of waste was glass, 8% nylon 4% plastic, 3%bottle, and 5% of wood. Also, 14% of the waste generated was recyclable waste in the sample accommodations. Besides, the result showed that the waste management practice rate in the small hotel is less than another accommodation sample size.                                

scholarly journals Impact of D igital T echnology on I mproving the E nvironmental S tatus of C ities

2019 ◽  
Vol 8 (3C) ◽  
pp. 155-159
Keyword(s):  
Urban Development ◽  
Negative Impact ◽  
Sharing Economy ◽  
Global Market ◽  
Sustainable Urban Development ◽  
Transport Sector ◽  
Advantages And Disadvantages ◽  
System A ◽  
Environmental Component ◽  
The City

The article substantiates possibilities of using digital technologies in a transport sector as the most important component that determines not only the economic, but also the ecological development of the city. In recent years, there have been changes in the formation of the economies of countries in recent years, especially in strengthening the environmental component. Sharing economy is a global trend that prioritizes use rather than ownership. Capitalization of the global market for online sharing services is growing rapidly and car sharing is one of the key sectors of the new economic model. Carsharing helps unload roads due to the rational use of cars, being a full-fledged alternative to buying a car for many citizens. Being an element of sustainable urban development, urban logistics defines and minimizes the negative impact of logistics activities on the environment of the city. In the framework of this article, an analysis of the carsharing system, a chronology of development, advantages and disadvantages, the process of interacting with the carsharing service have been made. It has been concluded that the carsharing system helps to improve the transport and environmental situation in megacities, thereby solving the problems of sustainable urban development, and digital technology is the key to this.

scholarly journals Socialization of Tofu Liquid Waste Management (Whey Tofu) Becomes Biogas as Alternative Energy Reserves in the Framework of Creating an Environmentally Friendly Industry

2020 ◽  
Vol 3 (2) ◽  
pp. 326
Author(s):  
Nely Ana Mufarida ◽  
Orisanto Darma Setiawan
Keyword(s):  
Waste Management ◽  
Community Service ◽  
Alternative Energy ◽  
Negative Impact ◽  
Biogas Production ◽  
Raw Materials ◽  
Liquid Waste ◽  
Environmentally Friendly ◽  
Added Value ◽  
Ecological Value

Arya Jaya is a trading business that is engaged in making tofu. UD. Arya Jaya began operations in 2003, by Mrs. Siti Aisyah. UD. Arya Jaya is in Bukkolan Village RT.01 RW.01 Paowan Village / Panarukan District Situbondo Regency East Java Province. To run this business, Mrs. Siti Aisyah was assisted by 12 workers.         At UD. Arya Jaya, so far the tofu wastewater has never been used and treated but has been discharged into the river. As a result, various cases of environmental pollution that make a negative impact on public health occur a lot.         Community service activities are also intended to train and foster communities around the tofu industry and tofu entrepreneurs so that they have knowledge about the utilization of tofu liquid waste and can improve skills around 75% to process tofu liquid waste into biogas in processing tofu liquid waste into biogas so it is expected With good management of the waste produced by the tofu making industry, it will add value to the product and be more environmentally friendly. In addition, the management of tofu wastewater in a waste to product manner can efficiently cost the costs, materials used, and energy to make new products from waste raw materials. Besides that, entrepreneurs know that they will no longer be difficult to deal with their waste.         Based on the situation analysis above, the PKM Team together with UD. Arya Jaya seeks to overcome the problem referred to as "The Socialization of Tofu Liquid Waste Management (Whey Tofu) Becoming Biogas As an Alternative Energy Reserve in the Framework of Creating an Environmentally Friendly Industry". The activity that will be carried out has very good prospects and is expected to provide information about the processing of tofu industrial wastewater using anaerobic biodigester technology for biogas production. For tofu industry entrepreneurs, the processing of various wastes can be converted into biogas into added value. By paying attention to environmental problems caused by the disposal of potentially polluting waste, the existence of anaerobic biodigester technology can provide economic and ecological value while reducing the potential for disposal. In addition, it can reduce the effects of pollution resulting in the greenhouse effect.         The final target and output are the publication of scientific articles in journals or proceedings in national community service seminars and newspaper article publications in national newspapers.  

Assessment of seasonal variability of air pollution by transport in Belarus

2020 ◽  
Author(s):  
Hanna Malchykhina ◽  
Olga Krukowskaya
Keyword(s):  
Air Pollution ◽  
Air Quality ◽  
Negative Impact ◽  
Transport Sector ◽  
Problem Solution ◽  
Main Challenge ◽  
Pollution Problem ◽  
Environmental Monitoring System ◽  
Information Number ◽  
Main Input

<p>Air pollution problem is the main challenge of the present. It is known that the transport is one of the main emission sources of such pollutants as NOx, CO, and TSP. Thus decreasing of emissions from the mobile sources could be one of the key elements of air emissions problem solution. The developing of measures to reduce the negative impact of the air pollution requires detailed information on emissions sources and the relationship between emissions and air quality. The article is devoted to assessment of annual variability of air pollution by transport and revealing the correlation between emissions of pollutants and their concentration.</p><p>Emissions assessment of main pollutants (NOx, CO, SO2, NMVOC, TSP) was carried out using emissions model COPERT, which is widely used to assess emissions from transport sector on different levels of aggregation – from city to country. The main input parameters of the model are vehicle fleet information (number of vehicles by fuel type, environmental standards, and the engine capacity), fuel consumption, meteorological conditions, mileage by vehicle types, average speeds for each category of vehicles. Data on pollutants concentration in the air were obtained from the National environmental monitoring system of Belarus.</p><p>It was shown that the annual emissions variability differs depending on type of pollutants. In particular the maximum carbon monoxide emissions were observed in cold months, and minimum - in warm months. The main source of CO emissions variation is emissions during the cold start. In the case of NMVOC emissions the situation is reverse.  Maximum emissions were obtained in August and minimum emissions in winter months. Comparison of the obtained emissions data with the concentration has shown high correlation for CO and NMVOC.</p><p>The findings could help to understand ways of air quality formation thereby to develop a solution on air quality management.</p>

scholarly journals Assessment of poultry waste management in Trishal upazila, Mymensingh

2015 ◽  
Vol 2 (2) ◽  
pp. 293-300 ◽  
Author(s):  
Md Shahadat Hossen ◽  
Ziaul Hoque ◽  
Begum Samsun Nahar
Keyword(s):  
Waste Management ◽  
Soil Amendment ◽  
Environmental Problem ◽  
Negative Impact ◽  
Biogas Production ◽  
Storage System ◽  
Fish Feed ◽  
Poultry Waste ◽  
Financial Problem ◽  
Treatment Facilities

A study was conducted to assess the present status of poultry waste management by poultry farmers in Trishalupazila of Mymensingh district, Bangladesh during July to November 2013. A structured, pre-tested questionnaire was used for collecting data. The highest 52% respondents were involved in layer farming and majority of the respondents did not use any litter materials where 36% and 12% used rice husk and sawdust respectively as litter. The availability of storage and treatment facilities was in 24% farms but their storage system was uncovered. Fifty per cent of the farmers sold their litter while some other used as fish feed, soil amendment and for biogas production. Only 16% farmers faced diseases related to poultry waste and the rest (84%) never faced any disease. It was noticed that 54% farmers faced environmental problems and 46% were unconcerned about environmental problem. They considered odor, flies and mosquitoes and leaching as environmental problem. Only 24% farmer mentioned financial problem as barrier of poultry waste management and majority claimed about unconsciousness. It is concluded that poultry waste management by farmers in the study area is inefficient, implying inadequate awareness of the potential negative impact of poor handling of poultry wastes. More extensive work is required to trainup the poultry farmer for proper handling and utilization of poultry wastes.Res. Agric., Livest. Fish.2(2): 293-300, August 2015

Sign in / Sign up

Export Citation Format

Share Document