scholarly journals Design and Operation of a Modern Polish Plant for Plastic Waste Recycling through the Degradative Depolymerization Process. A Case Study

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6620 ◽  
Author(s):  
Andrzej Duda ◽  
Arkadiusz Fenicki ◽  
Patryk Molski ◽  
Elżbieta Szostak ◽  
Piotr Duda
Keyword(s):  
Negative Pressure ◽  
Waste Recycling ◽  
Considerable Reduction ◽  
Industrial Scale ◽  
Process Safety ◽  
Innovative Solutions ◽  
Plastic Waste Recycling ◽  
High Level ◽  
Two Stages

The paper describes an installation for the degradative depolymerization of polyolefin materials obtained from wastes, hereinafter also referred to as depolymerization for simplicity. The plant, on an industrial scale, is one of the few operating in Poland. However, it is one of the most modern plants in this industry. Design solutions, construction of particular technological lines, compliance with national and EU regulations and the high level of process safety were described in this paper as well as compared to other plants of this type in Poland. Different solutions were presented in drawings and photos of the plant and in fragmentary technological diagrams. The types of waste and the methods of their processing by the plant were also characterized in accordance with the applicable regulations. The waste throughput is from 2000 to 4000 kg/h, while the efficiency of the depolymerization installation itself is 1500 kg/h. The industrial-scale depolymerization process is carried out in one or two stages: by homogenization (extraction) at a temperature up to 200 °C and depolymerization at temperatures up to 400 °C. The obtained products (energy goods) are sold for further processing. The processes, devices and methods are characterized by novel, innovative solutions, covered by a number of patents, which are also described below. The advantage of the presented technology is the substantial simplification of the process and thereby a considerable reduction in investment costs. Among others, the processes of distillation and rectification (low- and negative-pressure) were abandoned.

Social entrepreneurship in the informal economy: a case study of re-enactment festivals

2015 ◽  
Vol 9 (1) ◽  
pp. 6-16 ◽  
Author(s):  
Valery Gordin ◽  
Mariya Dedova
Keyword(s):  
Informal Economy ◽  
Russian Market ◽  
Content Type ◽  
Non Profit ◽  
Qualitative Survey ◽  
New Information ◽  
High Level ◽  
Entrepreneurial Activities ◽  
Two Stages

Purpose – The paper aims to generate new information on the types of entrepreneurial activities at the re-enactment festivals and their importance for the re-enactors. Design/methodology/approach – The study consisted of two stages: a content analysis of information available through online open access and a qualitative survey of re-enactors and a qualitative survey of re-enactors was organised and spanned from November 2012 to February 2013. Findings – The paper concludes that a specific form of entrepreneurship in the Russian market characterised by creation of social capital, a high level of devotion to engagement and, at the same time, non-profit-related gains has been emerged. Research limitations/implications – The socio-cultural phenomenon of entrepreneurship within re-enactment festivals is investigated. The study may be further developed by identifying various cultural events that may be characterised by the existence of an internal festival market. Originality/value – This paper highlights social entrepreneurial activities in informal sector by the example of re-enactment festivals.

scholarly journals Analyzing Productivity and Behavior of Plastic Drop-Off Points: A Case Study of Send Plastic Home Project in Plastic Waste Recycling during COVID-19 Outbreak

2021 ◽  
Vol 25 (10) ◽  
pp. 1-11
Author(s):  
Pavinee Pongpunpurt ◽  
Natsuda Navamajiti ◽  
Kerkritt Sriroongvikrai ◽  
Muentawan Onnom ◽  
Pat Pinitjitsamut ◽  
...  
Keyword(s):  
Waste Recycling ◽  
Plastic Waste ◽  
Plastic Waste Recycling ◽  
And Behavior

scholarly journals Innovative approaches to plastic waste recycling using the example of the textile industry

2021 ◽  
Vol 10 (46) ◽  
pp. 234-243
Author(s):  
Ivan Abramenko ◽  
Kseniya Boyeva ◽  
Oksana Dubskaya ◽  
Vladimir Gubachev ◽  
Anton Murzin
Keyword(s):  
Textile Industry ◽  
Negative Impact ◽  
Waste Recycling ◽  
Plastic Waste ◽  
Waste Processing ◽  
Pollution Problem ◽  
Innovative Solutions ◽  
The World ◽  
Recycling Technology ◽  
Plastic Waste Recycling

Nowadays, pollution problem is very acute all over the world. Significant reduction of negative impact of pollutants on humans and the environment, as well as the improvement of a number of environmental and economic indicators can be ensured by the achievement by the countries of a proper level of development in the waste recycling issue. Within the framework of this article, the problems of plastic waste processing and the introduction of innovative solutions for their disposal and recycling are considered. The research aims to study the innovative ways of plastic waste recycling and assess the feasibility of their use in the textile industry. In the course of the study, the experience of introducing innovative environmentally-oriented technologies for plastic waste recycling was studied, the main approaches and strategies for introducing environmental innovations, as well as priority areas of environmentally oriented innovations in production, were considered. The main result of the study includes reasonable proposals for the implementation of plastic waste recycling technology in the production of textiles.

scholarly journals Community Empowerment Through Plastic Waste Recycling To Improve Community Economy

2020 ◽  
Vol 3 (2) ◽  
pp. 41-44
Author(s):  
Sukma Irdiana ◽  
Kusnanto Darmawan ◽  
Kurniawan Yunus Ariyono
Keyword(s):  
Social Media ◽  
Economic Value ◽  
Waste Recycling ◽  
Community Empowerment ◽  
Qualitative Approach ◽  
Plastic Waste ◽  
Model Data ◽  
Community Economy ◽  
Plastic Waste Recycling

The research aims to increase people's creativity in managing plastic waste into goods that have economic value. This research raises the issue of tackling plastic waste in Lumajang Regency. The object of this research was conducted in Pasrujambe District, Lumajang Regency. This research uses a qualitative approach with a case study model. Data collection in this study used two ways, namely interviews and observations. Furthermore, after the data was collected from the informants, analysis was carried out. The results of this study indicate that the Pasrujambe community consisting of PKK, Gerbangmas and PKK Friends enthusiastically participated in the training stages. Starting from plastic waste creation training, marketing training through social media to simple accounting training. The results of this training the community can make, among others, bags, plastic drinking containers, flowers, pencil cases, vases and so on. In addition, the community has also been able to market these products through FB, WA and Instagram and the community has also benefited from the plastic waste creation products they make.

Work Life Balance Of Female Crew In The Aviation Industry: A Case Study

GIS Business ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. 206-212
Author(s):  
Dr. D. Shoba ◽  
Dr. G. Suganthi
Keyword(s):  
Family Life ◽  
Work Life ◽  
Work Life Balance ◽  
Aviation Industry ◽  
Life Balance ◽  
International Airport ◽  
Work Pressure ◽  
Women Employees ◽  
High Level

Employees and employers are facing issues in work life balance. It has become a difficult domain now, because the work needs have increased due to an increase in work pressure and complexities in handling the technology. As there are drastic changes in the rules and regulations in the work scenario of the aviation industry, it makes work life balance of employees difficult and set more hurdles. Hence there are many distractions and imbalances in the life of women employees in the aviation industry working across all levels. This work pressure is creating high level of hurdles in maintaining a harmonious job and family life, especially for female aviation employees. Data is collected from 50 female crew members working at Cochin International Airport. The objective of this study is to analyze the work life balance of working females of Cochin International Airport and its influence on their personal and specialized lives. The result of the study shows that the management should frame certain policies which will help employees to have the balance among their personal and expert lives.

The Implementation of Biological Phosphorus and Nitrogen Removal with the Bio-Denipho Process on a 265,000 PE Treatment Plant

1992 ◽  
Vol 25 (4-5) ◽  
pp. 161-168 ◽  
Author(s):  
J. Einfeldt
Keyword(s):  
Nitrogen Removal ◽  
Treatment Plant ◽  
First Year ◽  
In Series ◽  
Design Loads ◽  
Last Stage ◽  
Two Stages ◽  
The City ◽  
Biological Phosphorus

A process, called Bio-Denipho, for combined biological phosphorus and nitrogen removal in a combination of an anaerobic tank and two oxidation ditches is described. In this process the anaerobic tank consisting of three sections working in series is followed by two oxidation ditches. These too are working in series, but with both inlet to and outlet from the tanks changing in a cycle. The Bio-Denipho process is described specifically for the process itself and as a case study for the implementation of the process on a 265,000 pe wastewater treatment plant for the city of Aalborg in Denmark. The plant was designed and erected in two stages and the last stage was inaugurated October 31,1989. Lay-out and functions for the plant is described and design loads, plan lay-out and tank volumes are given in this paper together with performance data for the first year in operation.

scholarly journals Spatial Analysis of the Drivers, Characteristics, and Effects of Forest Fragmentation

2021 ◽  
Vol 13 (6) ◽  
pp. 3246
Author(s):  
Zoe Slattery ◽  
Richard Fenner
Keyword(s):  
Forest Fragmentation ◽  
Forest Fires ◽  
Geographical Information ◽  
Agricultural Expansion ◽  
Forest Patches ◽  
Mato Grosso ◽  
Remote Imaging ◽  
Landscape Characteristics ◽  
High Level

Building on the existing literature, this study examines whether specific drivers of forest fragmentation cause particular fragmentation characteristics, and how these characteristics can be linked to their effects on forest-dwelling species. This research uses Landsat remote imaging to examine the changing patterns of forests. It focuses on areas which have undergone a high level of a specific fragmentation driver, in particular either agricultural expansion or commodity-driven deforestation. Seven municipalities in the states of Rondônia and Mato Grosso in Brazil are selected as case study areas, as these states experienced a high level of commodity-driven deforestation and agricultural expansion respectively. Land cover maps of each municipality are created using the Geographical Information System software ArcGIS Spatial Analyst extension. The resulting categorical maps are input into Fragstats fragmentation software to calculate quantifiable fragmentation metrics for each municipality. To determine the effects that these characteristics are likely to cause, this study uses a literature review to determine how species traits affect their responses to forest fragmentation. Results indicate that, in areas that underwent agricultural expansion, the remaining forest patches became more complex in shape with longer edges and lost a large amount of core area. This negatively affects species which are either highly dispersive or specialist to core forest habitat. In areas that underwent commodity-driven deforestation, it was more likely that forest patches would become less aggregated and create disjunct core areas. This negatively affects smaller, sedentary animals which do not naturally travel long distances. This study is significant in that it links individual fragmentation drivers to their landscape characteristics, and in turn uses these to predict effects on species with particular traits. This information will prove useful for forest managers, particularly in the case study municipalities examined in this study, in deciding which species require further protection measures. The methodology could be applied to other drivers of forest fragmentation such as forest fires.

CSim 2

2021 ◽  
Vol 43 (1) ◽  
pp. 1-46
Author(s):  
David Sanan ◽  
Yongwang Zhao ◽  
Shang-Wei Lin ◽  
Liu Yang
Keyword(s):  
Programming Languages ◽  
Concurrent Systems ◽  
Theorem Prover ◽  
Compositional Techniques ◽  
Machine Code ◽  
Top Down ◽  
Hol Theorem Prover ◽  
High Level ◽  
High Degree

To make feasible and scalable the verification of large and complex concurrent systems, it is necessary the use of compositional techniques even at the highest abstraction layers. When focusing on the lowest software abstraction layers, such as the implementation or the machine code, the high level of detail of those layers makes the direct verification of properties very difficult and expensive. It is therefore essential to use techniques allowing to simplify the verification on these layers. One technique to tackle this challenge is top-down verification where by means of simulation properties verified on top layers (representing abstract specifications of a system) are propagated down to the lowest layers (that are an implementation of the top layers). There is no need to say that simulation of concurrent systems implies a greater level of complexity, and having compositional techniques to check simulation between layers is also desirable when seeking for both feasibility and scalability of the refinement verification. In this article, we present CSim 2 a (compositional) rely-guarantee-based framework for the top-down verification of complex concurrent systems in the Isabelle/HOL theorem prover. CSim 2 uses CSimpl, a language with a high degree of expressiveness designed for the specification of concurrent programs. Thanks to its expressibility, CSimpl is able to model many of the features found in real world programming languages like exceptions, assertions, and procedures. CSim 2 provides a framework for the verification of rely-guarantee properties to compositionally reason on CSimpl specifications. Focusing on top-down verification, CSim 2 provides a simulation-based framework for the preservation of CSimpl rely-guarantee properties from specifications to implementations. By using the simulation framework, properties proven on the top layers (abstract specifications) are compositionally propagated down to the lowest layers (source or machine code) in each concurrent component of the system. Finally, we show the usability of CSim 2 by running a case study over two CSimpl specifications of an Arinc-653 communication service. In this case study, we prove a complex property on a specification, and we use CSim 2 to preserve the property on lower abstraction layers.

Sign in / Sign up

Export Citation Format

Share Document