Bioenergy II: Bio-Ethanol from Municipal Solid Waste (MSW): The Role of Biomass Properties and Structures During the Ethanol Conversion Process

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Aiduan Li ◽  
Majeda Khraisheh
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Organic Waste ◽  
Conversion Process ◽  
Process Conditions ◽  
Cellulose Content ◽  
Substrate Composition ◽  
Substrate Properties ◽  
Promising Source

The emerging biofuel industry demands large amount of biomass feedstock. Although commercial ethanol has been produced from primary biomass sources such as corns, the global food crisis caused by the use of primary biomass has been raised. Thus, lignocellulosic biomass, known as second generation of biomass, has become a promising source for ethanol production. However, the more complex structure requires more advance technology. MSW with more than 60% of biodegradable composition, as one of the promising biomass sources has the potential benefits of replacing primary biomass and preventing environment from MSW pollution.In this paper, three major biodegradable municipal solid waste (BMSW) components: kitchen organic waste (KOW), green organic waste (GOW) and paper and card waste (PCW), are classified and characterised according to substrate composition, cellulose crystallinity, bulk density and particle size. The substrate composition indicates how much cellulose, lignin, hermicellulose each model waste has. The cellulose content shows the potential glucose/ethanol product yield. Other chemical composition such as lignin and hemicellulose indicates how easy of each model waste can be converted. These contents are also important information when selecting pretreatment methods and conversion process conditions in the following steps.Based on the comprehensive understanding of biomass structures and compositions, studies look into the effects of substrate properties (such crystallinity, presence of lignin and cellulose content on process performances during enzymatic hydrolysis adsorption. Results indicated how the adsorption process is affected by the substrate properties. This provides understanding of the role of substrate properties during enzyme-cellulose adsorption.

scholarly journals Analysis on the MSW thermal degradation processes

2013 ◽  
Vol 9 (1) ◽  
pp. 57-62
Keyword(s):  
Thermal Degradation ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Degradation Kinetics ◽  
Variable Temperature ◽  
Fixed Bed ◽  
Reduction Rate ◽  
Pollutant Emissions ◽  
Process Conditions ◽  
Degradation Processes

The waste to renewable energy source has become a priority in the wastes treatment field. The research goal is not only the wastes destruction but also a better thermal energy recovery from the processes. The municipal solid waste presents a high heterogeneity degree from the dimensional point of view, form and its components specific weight of as well as thermal-chemical characteristics. That’s why there are many treatment methods, each one with its own particularities. For a better understanding of the phenomenon during thermal degradation processes both under pyrolysis or atmospheric pressure gasification stages we first accomplished a laboratory scale series of experiments in a tubular reactor, on small quantities (5 – 10 grams) of reconstituted urban wastes. For the validation of the obtained data on more representative samples we extended the experiment to an original industrial scale pilot installation that enables the continuous thermal treatment of 10 – 50 waste kilograms per hour under oxidant or non-oxidant atmosphere (on choice) and at variable temperature between 400 °C – 1100 ºC. The residential time of the treated sample in the installation and the flow conditions can be set independently. The installation reproduces the incinerators or the pyrolysis / gasification reactor process conditions and provides complete information on the wastes thermal degradation kinetics and on the pollutant emissions. The particularity of the device consists in the product advancing piston – like flow system based on the bed vibration. The product particles in the bed have a translation movement without any layer shift. Therefore the particles distribution in a given product bed section is the same all along the installation from the feeding inlet to the extraction. That characteristic enables us to extrapolate and compare the laboratory results of the fixed bed treatment to the industrial pilot continuously treatment applied on the same product: reconstituted municipal solid waste, one of the most heterogynous solid wastes in mixture. The main targets were the sample mass reduction rate, the resulting gases composition, the samples mechanical behavior for different temperature levels, residential time, treatment atmosphere conditions and different steam flow rates (in the gasification process). The results were compared to an established reference – the incineration. The paper presents the research and results on the degradation mechanisms of MSW treated samples in those two equipments from the Science Division CNRS, Department of Industrial Methods, University of Technology Compiègne, France.

scholarly journals Lei da Compostagem e Participação Social: Etnografando políticas públicas em Florianópolis/SC

ILUMINURAS ◽  
2021 ◽  
Vol 21 (55) ◽  
Author(s):  
Rianna De Carvalho Feitosa ◽  
Maristela Oliveira de Andrade
Keyword(s):  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Social Participation ◽  
Solid Waste Management ◽  
Public Policies ◽  
Environmental Policies ◽  
Municipal Solid Waste Management ◽  
Descriptive Research

Resumo: Neste artigo buscamos compreender o papel da participação social na construção de políticas públicas relacionadas à gestão de resíduos sólidos urbanos (RSU). Fazemos isso a partir da análise do contexto de aprovação de uma lei pioneira no Brasil, que ficou conhecida como Lei da Compostagem (2019), pelo município de Florianópolis/SC. Realizamos pesquisa qualitativa e descritiva, com uma etapa documental e outra etnográfica. Primeiramente, sistematizamos um quadro histórico-político das relações da cidade com o lixo, apontando a sucessão de políticas e ações que reflete na forma como os RSU são geridos no município. Em seguida, apresentamos resultados da pesquisa etnográfica feita a partir da observação de duas sessões plenárias nas quais ocorreram as votações do Projeto de Lei 17.506/2018, conhecido como PL da Compostagem. Buscamos demonstrar a importância da participação social na aprovação dessa lei, capaz de trazer avanços significativos em relação à gestão de resíduos no município e no país.Palavras-chave: Resíduos sólidos urbanos. Compostagem. Políticas ambientais. Participação social.  COMPOSTING LAW AND SOCIAL PARTICIPATION: ETHNOGRAPHY OF PUBLIC POLICIES IN FLORIANÓPOLIS / SC  Abstract: This paper aims to understand the role of social participation in the construction of public policies related to municipal solid waste management (MSWM). We do this by analyzing the context of approval of a pioneering law in Brazil, which became known as the Composting Law (2019), by the municipality of Florianópolis/SC. We conducted qualitative and descriptive research, with a documentary and an ethnographic stage. Initially, we systematized a historical-political framework of the city's relationship with waste, pointing the succession of policies and actions that reflected in how the MSW are managed in the municipality. Thereafter, we present results of the ethnographic research conducted from the observation of two plenary sessions, situations in which voting of PL (Bill) 17.506/2018, known as Composting Bill, took place. We aim to demonstrate the importance of social participation in the approval of this law, capable of bringing significant advances in relation to waste management in the municipality and in the country.Keywords: Municipal solid waste. Composting. Environmental policies. Social participation.

scholarly journals Drivers of municipal solid waste management cost based on cost models inherent to sorted and unsorted waste

2021 ◽  
Author(s):  
Giacomo Di Foggia ◽  
Massimo Beccarello
Keyword(s):  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Economies Of Scale ◽  
Solid Waste Management ◽  
Cost Minimization ◽  
Critical Role ◽  
Municipal Solid Waste Management ◽  
Cost Models

After having divided waste management cost in its cost items, we focus on how well-known exogenous and endogenous drivers impact on such cost items. To this end, we collected empirical data of 6,616 Italian municipalities for a two-year period. We develop four regression-based models to analyze the data according to cost items. Models are also reiterated using different data normalization: cost per ton of waste or waste per capita. Besides exogenous determiners of cost, such as altitude, population density, and coastal zone, results refer to both unsorted and sorted waste management cost items. In this respect economies of scale are confirmed along with the critical role of adequate waste facilities that play a remarkable role in cost minimization. Policymakers and regulators may benefit from such results when it comes to define allowed revenues and design the scope of municipal solid waste regulation.

Estimating Greenhouse Gas (GHG) Emissions from Municipal Solid Waste (MSW) in Oman Using Different Frameworks

2021 ◽  
Vol 47 (2) ◽  
pp. 332-348
Author(s):  
Tariq Umar
Keyword(s):  
Climate Change ◽  
Municipal Solid Waste ◽  
Greenhouse Gas ◽  
Solid Waste ◽  
Environmental Sustainability ◽  
Organic Waste ◽  
Ghg Emissions ◽  
Gulf Cooperation Council ◽  
Council Member ◽  
Tackle Climate Change

Reduction in emissions is the key to tackle climate change issues and achieve environmental sustainability. The Gulf Cooperation Council member countries however, not only generate the highest quantity of MSW/capita when compared globally but also in most of these countries such waste is just dumped at different landfill stations. In Oman, the total quantity of MSW stood at 2.0 million tonnes/year. The emission from this waste is estimated at 2,989,467 tonnes/year (CO2 Equivalent). This article attempts to develop frameworks that considered landfilling, composting, and recycling of MSW and compared the emissions of these frameworks. The framework (F2) which proposes the landfilling and composting process for the organic waste which normally goes to landfills results in an increase of emissions by 7% as compared to landfill practice. Similarly, the samples of MSW collected in Oman show a good amount of recycling waste. The framework (F3) which considers the landfill, composting, and recycling reduced the total Greenhouse Gas emissions from 2,989,467 tonnes/year to 2,959,735 tonnes/year (CO2 Equivalent); representing a total reduction of 1% in emissions. Although composting increases the emissions, however, considering composting and recycling will not only reduce the burden on landfills but will promote agricultural and industrial activates.

Municipal solid waste management considering NGO’s role in consumer environmental awareness and government regulations for air pollution

2020 ◽  
Vol 15 (3) ◽  
pp. 783-807
Author(s):  
Masoud Rabbani ◽  
Parisa Hashemi ◽  
Pegah Bineshpour ◽  
Hamed Farrokhi-Asl
Keyword(s):  
Air Pollution ◽  
Sensitivity Analysis ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Environmental Awareness ◽  
Mixed Integer ◽  
Good Effect ◽  
Municipal Solid Waste Management ◽  
Content Type

Purpose The purpose of this study is twofold: first, to examine the role of non-governmental organizations (NGOs) in increasing customer environmental awareness (CEA) to decrease the municipal solid waste (MSW), and secondly, to examine the effect of government policies in the amount of air pollution caused by transfer stations (TSs). Design/methodology/approach This study proposes a mixed-integer nonlinear programming model. For solving this multi-objective problem, the authors use epsilon constraint method, which presented eight Pareto solutions. For selecting the best solution, the analytic hierarchy process approach is used. The presented model is applied on a real case study, and the results are discussed and sensitivity analysis is implemented on the parameters of the concern. Findings This study confirms the assumption that by allocating budget to NGOs for increasing CEA, the produced waste will be decreased. Research limitations/implications In the present study, the authors only investigate air pollution caused by TS. Future studies can investigate other types of pollution. Furthermore, uncertainty in the amount of produced waste can be variable making the problem closer to the real environment. In this case, robust optimization may have better results. Practical implications Based on the results of sensitivity analysis, some implications obtain that can highlight by managers in the decision-making process. The operational costs of TS have a critical aspect in founding TS, so using new technology and high-tech machines for operational processes of TSs, can result in decreasing the running cost of TSs. Also, the determination of TS capacity is a remarkable issue in optimization, which should be paid special attention to this for the design of TSs in the planning phase of the system. Moreover, collaborating with NGOs has a good effect on increasing CEA that results in a decrease of MSW. Originality/value The role of NGOs and government simultaneity has been considered in a green supply chain. Moreover, the authors considered TS between source and disposal that reduce the time of transferring waste. Therefore, this study can be beneficial for the MSW management system, which faces the problems in the lack of capacity and transportation problems and environmental issues by proposing solutions in three studies including economic, environmental and social aspects.

Co-biodrying of sewage sludge and organic fraction of municipal solid waste: Role of mixing proportions

2018 ◽  
Vol 77 ◽  
pp. 333-340 ◽  
Author(s):  
Difang Zhang ◽  
Wenhai Luo ◽  
Jing Yuan ◽  
Guoxue Li
Keyword(s):  
Sewage Sludge ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Organic Fraction

Anaerobic digestion of organic waste in Japan: the first demonstration plant at Kyoto City

2002 ◽  
Vol 45 (12) ◽  
pp. 113-118 ◽  
Author(s):  
T. Komatsu ◽  
T. Kimura ◽  
Y. Kuriyama ◽  
Y. Isshiki ◽  
T. Kawano ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Energy Recovery ◽  
Organic Waste ◽  
Yard Waste ◽  
Kyoto City ◽  
Demonstration Plant

Recycling of Municipal Solid Waste is vigorously promoted in Japan and the necessity of energy recovery from organic waste is increasing. An anaerobic digestion demonstration plant for organic waste in Kyoto City, Japan has been operated for about two years. Three kinds of wastes (garbage and leftovers from hotels, yard waste and used paper) mixed at various ratios are used. The plant has maintained stable operations with each mixture, generating biogas by the decomposition of VS at the rate of about 820 m3N/ton-VS.

scholarly journals PENGELOLAAN SAMPAH PLASTIK DI SALATIGA: Praktik, dan tantangan

2019 ◽  
Vol 17 (1) ◽  
pp. 90
Author(s):  
Berliana Anggun Septiani ◽  
Dian Mita Arianie ◽  
Via Fide Aditya Andi Risman ◽  
Widhi Handayani ◽  
Istiarsi Saptuti Sri Kawuryan
Keyword(s):  
Waste Management ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Waste Treatment ◽  
Solid Waste Management ◽  
Plastic Waste ◽  
Municipal Solid Waste Management ◽  
Waste Production ◽  
The Government

The increase of solid waste production is a general problem in municipality, particularly of plastic waste. The durability, light-weight, anticorrosiveness, and inexpensiveness properties of plastic make it favorable to be used in daily life, including in Salatiga. However, plastic is one of some non-biodegradable materials that could lead to soil and water pollution as it contains toxic compounds such as aromatic hydrocarbons, phthalates, and organochlorine. Various studies in municipal solid waste management have been conducted. While those studies often applied various approaches separately, researches in regard to the role of stakeholders in municipal solid waste management are very limited. This study aims to explain the plastic waste management in Salatiga based on the role of the corresponding stakeholders. This qualitative study shows that there are four stakeholders who were involved in municipal plastic waste management in Salatiga. They were the households who generate wastes, the scavengers who sorts the wastes, Bank Sampah and collectors who have the same role in order to collect the wastes and treat the plastic wastes through reusing or recycling processes, and the government. Currently, efforts in waste treatment in Salatiga are focused on the system of collecting-tranferring-disposal mode, waste treatment by reuse and recycle processing, and landfilling. Reducing plastic consumption must take into account the sociocultural aspect and environmental awareness, as the people still interested to use plastic instead of using other materials in substitution. Finally, the role of government is central to educate the community in term of sorting activities and reducing waste production, build the capacity of Bank Sampah, and manage the role of scavengers and collectors. Other alternatives include creating synergy between the collectors and Bank Sampah, as well as ensuring final treatment of the unprocessed wastes disposed by collectors and Bank Sampah. 

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