scholarly journals The Design of Sustainable City Multi-Floor Manufacturing Processes Under Uncertainty in Supply Chains

2020 ◽  
Vol 12 (22) ◽  
pp. 9439
Author(s):  
Tygran Dzhuguryan ◽  
Agnieszka Deja ◽  
Bogusz Wiśnicki ◽  
Zofia Jóźwiak
Keyword(s):  
Supply Chains ◽  
Urban Areas ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Performance Model ◽  
Sustainable City ◽  
Sustainable Supply Chains ◽  
Capacity Loss ◽  
Proposed Model ◽  
The City

The application of multi-floor manufacturing (MFM) in huge cities is related to the rational use of urban areas and the solution to traffic problems. The operation of the city MFM clusters depends on the efficiency of production and transport management considering technical, economic, environmental, and other factors. The primary goal of this paper was to identify and analyze the drivers of sustainable supply chains (SSCs) that influence or encourage the design of sustainable processes in city MFM clusters under uncertainty in supply chains. This paper presents an SSC performance model for city MFM clusters under uncertainty. The proposed model is universal and is based on material flow analysis (MFA) methodology. The presented analysis helps to determine the conditions for rhythmic deliveries with the use of the multi-IRTs. The coefficients of rhythmic deliveries for multiple intelligent reconfigurable trolleys (IRTs) and the capacity loss of freight elevators allow us to periodically assess the sustainability processes in city MFM clusters related to the flow materials. These assessments are the basis for the decision-making and planning of SSCs.

scholarly journals The State of the Art of Material Flow Analysis Research Based on Construction and Demolition Waste Recycling and Disposal

Buildings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 207 ◽  
Author(s):  
Dongming Guo ◽  
Lizhen Huang
Keyword(s):  
Material Flow ◽  
State Of The Art ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Waste Recycling ◽  
Construction And Demolition Waste ◽  
Waste Processing ◽  
City Development ◽  
Demolition Waste ◽  
Sustainable City

Construction and demolition waste (C&D waste) are widely recognized as the main form municipal solid waste, and its recycling and reuse are an important issue in sustainable city development. Material flow analysis (MFA) can quantify materials flows and stocks, and is a useful tool for the analysis of construction and demolition waste management. In recent years, material flow analysis has been continually researched in construction and demolition waste processing considering both single waste material and mixed wastes, and at regional, national, and global scales. Moreover, material flow analysis has had some new research extensions and new combined methods that provide dynamic, robust, and multifaceted assessments of construction and demolition waste. In this paper, we summarize and discuss the state of the art of material flow analysis research in the context of construction and demolition waste recycling and disposal. Furthermore, we also identify the current research gaps and future research directions that are expected to promote the development of MFA for construction and demolition waste processing in the field of sustainable city development.

scholarly journals Method for Quantifying Supply and Demand of Construction Minerals in Urban Regions—A Case Study of Hanoi and Its Hinterland

2020 ◽  
Vol 12 (11) ◽  
pp. 4358
Author(s):  
Georg Schiller ◽  
Tamara Bimesmeier ◽  
Anh T.V. Pham
Keyword(s):  
Urban Areas ◽  
Building Materials ◽  
Raw Materials ◽  
Supply And Demand ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Resource Efficiency ◽  
Raw Material ◽  
Urban Structures

Urbanization is a global trend: Since 2007 more than 50% of the world’s population have been living in urban areas, and rates of urbanization are continuing to rise everywhere. This growth in urbanization has led to an increased demand for natural resources, in particular non-metallic minerals such as stones, sand and clay, which account for one third of the entire flow of materials. Generally, these materials are traded within regional markets. This close geographical link between the demand for building materials in urban areas and the material supply in the hinterland leads to massive interventions in the natural environment and landscape. These urban–rural linkages can be revealed by applying Material Flow Analysis (MFA) to the built environment in order to trace the flows of building materials. The objective of this paper is to present a method for quantifying regional material flows by considering the supply and demand of building materials. This will be applied to the Vietnamese case study area of Hanoi and its hinterland province Hoa Binh. The results indicate a consumption of almost 60% of the construction mineral reserves in total secured by planning in the hinterland province considering a period of 15 years. However, this does not allow for the general conclusion that raw materials are sufficiently available. The sand reservoirs are only sufficient for eight years and clay reserves are used up after four years. This increases the need to exploit further raw material reserves, which are becoming increasingly scarce and results in stronger interventions in nature In order to safeguard the hinterland from the negative impacts of urbanization, a new understanding of resource efficiency is needed—one that acknowledges both resource efficiency in the construction of urban structures and appropriate resource conservation in the provision of the raw materials from the hinterland. This will require the creation of new integrated planning approaches between urban and regional planning authorities. Regional MFA is one way of realising such an approach.

scholarly journals Occurrence and Fate of Heavy Metals in Municipal Wastewater in Heilongjiang Province, China: A Monthly Reconnaissance from 2015 to 2017

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 728 ◽  
Author(s):  
Peng Du ◽  
Lingrong Zhang ◽  
Yuntao Ma ◽  
Xinyue Li ◽  
Zhenglu Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Urban Areas ◽  
Municipal Wastewater ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Wastewater Sludge ◽  
County Level ◽  
Heilongjiang Province ◽  
Municipal Wastewater Treatment ◽  
Modeling Tools

As one of the major sources of pollutions in the environments, effluents from municipal wastewater recently became a hot topic. This study quantified monthly county-level releases of five heavy metals, i.e., lead (Pb), cadmium (Cd), chromium (Cr), arsenic (As), and mercury (Hg), from municipal wastewater into the environment in the Heilongjiang Province of China, based on sampling, measurement, and modeling tools. Wastewater samples were collected from 27 municipal wastewater treatment plants (MWTPs) in 15 county-level cities of Heilongjiang every month from 2015 to 2017. The concentrations of five heavy metals were analyzed in both influents (Pb: 160 ± 100 μg/L; Cd: 15 ± 9.0 μg/L; Cr: 170 ± 64 μg/L; Hg: 0.67 ± 1.5 μg/L; As: 6.2 ± 4.8 μg/L) and effluents (Pb: 45 ± 15 μg/L; Cd: 5.2 ± 5.1 μg/L; Cr: 57 ± 13 μg/L; Hg: 0.28 ± 0.12 μg/L; As: 2.6 ± 1.4 μg/L). The removal ratios of the five heavy metals ranged from 50% to 67%. Inflow fluxes of Pb, Cr, and Cd displayed increasing trends first then decreased after reaching a maximum value, whereas those of Hg and Pb remained stable. Material flow analysis reveals that constructions of MWTPs are conducive to significantly reduce the releases of heavy metals from urban areas into the aquatic environment in the study area. Additionally, municipal wastewater sludge (used as fertilizer or spread on the land) could be a significant source of heavy metals in the land.

scholarly journals Paradigm of Eco-Urban-Agriculture for the Sustainable City: Integrating the Concept for Urban Dhaka

2018 ◽  
Vol 14 ◽  
pp. 1-14
Author(s):  
Ayasha Siddiqua
Keyword(s):  
Urban Agriculture ◽  
Urban Areas ◽  
Geographical Location ◽  
Theoretical Background ◽  
Climatic Conditions ◽  
Modern Concept ◽  
Open Spaces ◽  
Sustainable City ◽  
The City ◽  
Improve Health

The geographical location of Bangladesh is gifted with enormous natural recourse: water, alluvial land,suitable climatic conditions for bio diversity and other natural assets. The capital, Dhaka, surroundedby rivers on four sides, was once a blue-green-built environment offering a healthy living atmosphere forits habitants. The city was dotted with huge and crisscrossed water bodies, a tolerable population density,and enough open spaces. Urban and peri-urban areas of the city complemented its food demand whichsubsequently maintained the environmental equilibrium. The modern concept of eco-urban-agriculture willdefinitely be beneficial in such a dense city which is rapidly losing its livability by insensitive urbanization.This paper will describe how a city could generate food, improve health, and utilize waste by furthering theestablished urban-agriculture concept. It aims to develop an understanding of this concept in Bangladesh,particularly in the dense urban fabric of Dhaka, by discussing the theoretical background of urban agricultureand practiced models of eco-urban-agriculture in urban settings around the world.

Application of the material flow analysis method for evaluating Strategic Sanitation Plan in Sub-Saharan Africa: the case of Fada N'Gourma–Burkina Faso

2011 ◽  
Vol 63 (11) ◽  
pp. 2498-2504 ◽  
Author(s):  
Lydie Yiougo ◽  
Halidou Koanda ◽  
Christoph Luethi ◽  
Joseph Wéthé
Keyword(s):  
Decision Making ◽  
Material Flow ◽  
Urban Areas ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Sub Saharan Africa ◽  
Rapid Urbanization ◽  
Sub Saharan ◽  
Fada N’Gourma ◽  
Nitrogen Flows

In the context of rapid urbanization across Sub-Saharan Africa there is a critical need for more robust decision-making between different ways of providing sanitation services in existing and new peri-urban areas. In several countries, authorities tried to find solutions by developing strategies to address sanitation problems in the form of Strategic Sanitation Plans. In Burkina, Strategic Sanitation Plans have been elaborated and implemented since the 1990s. Fada N'Gourma, a secondary city in Burkina, also adopted a Strategic Plan for wastewater and excreta management in 2006. In this study we use material flow analysis as a decision making tool to verify technology options of the Plan. A model was developed and data was collected in order to assess material and nitrogen flows. The status quo situation was compared to scenario based on the proposals made in the Sanitation Plan. Results show that the technology options which were recommended improved human health in the short term. However, the options led to groundwater pollution in the medium term. Compared to the current situation, matter and nitrogen flows would increase by 7% and 7.4% respectively in groundwater. It is thus concluded that the proposed options will not achieve the Plan's stated objectives of environmental protection.

scholarly journals ANALISIS LAJU ALIR SAMPAH DAN EMISI CARBON YANG DIHASILKAN KOTA BANDA ACEH

2015 ◽  
Vol 3 (4) ◽  
pp. 6-11 ◽  
Author(s):  
M. Faisal
Keyword(s):  
Material Flow ◽  
Carbon Emission ◽  
Organic Waste ◽  
Treatment Process ◽  
Waste Treatment ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Solid Wastes ◽  
The City ◽  
Banda Aceh

This research aims to analyze the material flow of solid waste of  Banda Aceh city by using Material Flow Analysis (MFA) method. The domestic wastes used in this research are limited to organic waste, plastic and paper.  Results show that the solid wastes in Banda Aceh city do not treated well and thus required further treatment process. Wastes are separated at the kampong Jawa waste treatment process. Leaves waste are treated for compost, while no treatment process for plastic and paper wastes. The percentage of organic wastes, paper and plastic produced from Banda Aceh city were 89,1 %; 2,5 %; 0,74 %, respectively. Total amount of waste in the city of Banda Aceh is 86057,64 t/month producing carbon emission of 83726,6 t/month.

scholarly journals Integrated Evaluation Model of Construction Vulnerability in Anthropic Fill Areas (IALV). Case Study: District of Villaverde in the City of Madrid, Spain

2021 ◽  
Vol 13 (15) ◽  
pp. 8575
Author(s):  
Félix Escolano Sánchez ◽  
Francisco Parra Idreos ◽  
Manuel Bueno Aguado
Keyword(s):  
Urban Areas ◽  
Evaluation Model ◽  
Vulnerability Index ◽  
Soil Conditions ◽  
Review Of Literature ◽  
Proposed Model ◽  
The World ◽  
The City ◽  
Study District

Over the coming years, developments of large urban areas are expected, many of them on plots where soil conditions may not be the most suitable for building. This is the case of plots that previously have been used for dumping anthropic fill deposits. The term anthropic fill included a large variety of materials, all of them related with human activity; but this paper is mainly focused on natural materials extracted from nearby excavations or construction debris that form non-contaminated lands. In a review of literature related to risks, it is observed that in the last 10 years there have been abundant investigations to determine vulnerability in urban areas. However, the risks derived from the presence of anthropic landfills have generally been overlooked. For this reason, there is a real need to quantify construction vulnerability in areas settled on anthropic landfills. A methodology, up to now unknown, must be created to estimate and extrapolate it to any part of the world. The aim is to avoid the likelihood of pathologies appearing in urban areas. Hence, and to address this lack of knowledge, an Integrated Evaluation Model has been developed. Its purpose is to quantify, simply but effectively, the construction vulnerability index in already consolidated areas of historic landfills. The proposed model has been validated in a very popular district of the city of Madrid. Its surface, the number of buildings affected and population involved make it truly representative.

scholarly journals Development of IoT Based Smart Dustbin Monitoring System

2020 ◽  
Vol 9 (5) ◽  
pp. 816-821
Keyword(s):  
Monitoring System ◽  
Urban Areas ◽  
Garbage Collection ◽  
Waste Collection ◽  
Collection System ◽  
Proposed Model ◽  
The City ◽  
Indian Cities ◽  
The Internet Of Things ◽  
Central Station

The objective of this proposed system is to stay clean and to cover all urban areas of Indian cities. In existing waste collection systems, there is no proper planning for waste collection due to certain problems that make the city unsanitary. The work which consists in cleaning the trash cans is not responsible and which aggravates the system in the event of emergency, an appropriate monitoring is compulsory to keep the city clean and green. Only the manual waste collection system is available. There are no automatic or technological systems. This proposed system is designed for efficient waste collection using the Internet of Things. The system uses a cloud-based monitoring system for monitoring waste. With the use of a cloud-based system, there is no need to regularly check the bins. The proposed model has dustbins contain Arduino based sensing and monitoring system which gives the information about the levels of filling of dustbins and locations. Whenever any dustbin is filled up, a message is sent to the concerned central station where regularly monitoring the levels and positions of dustbins is to be done. This station monitors all the dustbin levels and gives the directions of collecting the garbage by sending message to the garbage collectors and authority. This will avoid overflow of waste in the bin. A prototype of proposed system to be designed as per the consideration of all problems in garbage collection process and by this the proposal makes the city towards a smart city. That fulfils the goals of Swachhbharat.

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