scholarly journals Sludge treatment and resource recovery towards carbon neutrality in China: current status and future perspective

2021 ◽  
Author(s):  
Ying Xu ◽  
Rui Liu ◽  
Donghai Yang ◽  
Xiaohu Dai
Keyword(s):  
Carbon Emissions ◽  
Wastewater Treatment Plants ◽  
Resource Recovery ◽  
Current Status ◽  
Future Perspective ◽  
Future Research ◽  
Sludge Treatment ◽  
Global Challenge ◽  
Process Route ◽  
The Future

Abstract Global warming – mainly caused by carbon emissions – is a major global challenge for human sustainable development. Carbon emission reduction and resource recovery from sludge treatment are critical to the carbon neutralisation of future wastewater treatment plants. This paper analyses the key elements of carbon emissions during sludge treatment and disposal, namely energy source carbon emissions, fugitive carbon emissions and carbon compensation. Of the four mainstream process routes analysed in this work, anaerobic digestion + dry incineration is identified as the route with the highest potential for reducing carbon emissions in the future. Finally, based on a review of current international research hotspots, the future development directions for sludge treatment and resource recovery are discussed. This paper thus provides a comprehensive understanding of the current sludge treatment processing routes and serves as a reference for process route selection and future research on carbon neutralisation.

Treatment and Quality of Sewage Sludge in Germany - Results of a Survey

2007 ◽  
Vol 2 (1) ◽  
Author(s):  
A. Meda ◽  
C. Schaum ◽  
M. Wagner ◽  
P. Cornel ◽  
A. Durth
Keyword(s):  
Sewage Sludge ◽  
Treatment Process ◽  
Wastewater Treatment Plants ◽  
Current Status ◽  
Sludge Treatment ◽  
Sewage Sludge Treatment ◽  
Treatment And Disposal ◽  
German Association ◽  
Entire Treatment

TIn 2004, the German Association for Wastewater, Water and Waste (DWA) carried out a survey about the current status of sewage sludge treatment and disposal in Germany. The study covered about one third of the wastewater treatment plants and about two thirds of the entire treatment capacity (expressed in population equivalents) in Germany. This provides an up-to-date and representative database. The paper presents the most important results regarding sludge treatment, process engineering, current disposal paths and sewage sludge quality.

State-of-the-art literature review on inventory models for perishable products

2018 ◽  
Vol 15 (3) ◽  
pp. 306-346 ◽  
Author(s):  
Vaibhav Chaudhary ◽  
Rakhee Kulshrestha ◽  
Srikanta Routroy
Keyword(s):  
Inventory Management ◽  
Systemic Review ◽  
Current Status ◽  
Future Research ◽  
Inventory Models ◽  
Research Gaps ◽  
Content Type ◽  
Perishable Items ◽  
Perishable Inventory ◽  
The Future

PurposeThe purpose of this paper is to review and analyze the perishable inventory models along various dimensions such as its evolution, scope, demand, shelf life, replenishment policy, modeling techniques and research gaps.Design/methodology/approachIn total, 418 relevant and scholarly articles of various researchers and practitioners during 1990-2016 were reviewed. They were critically analyzed along author profile, nature of perishability, research contributions of different countries, publication along time, research methodologies adopted, etc. to draw fruitful conclusions. The future research for perishable inventory modeling was also discussed and suggested.FindingsThere are plethora of perishable inventory studies with divergent objectives and scope. Besides demand and perishable rate in perishable inventory models, other factors such as price discount, allow shortage or not, inflation, time value of money and so on were found to be combined to make it more realistic. The modeling of inventory systems with two or more perishable items is limited. The multi-echelon inventory with centralized decision and information sharing is acquiring lot of importance because of supply chain integration in the competitive market.Research limitations/implicationsOnly peer-reviewed journals and conference papers were analyzed, whereas the manuals, reports, white papers and blood-related articles were excluded. Clustering of literature revealed that future studies should focus on stochastic modeling.Practical implicationsStress had been laid to identify future research gaps that will help in developing realistic models. The present work will form a guideline to choose the appropriate methodology(s) and mathematical technique(s) in different situations with perishable inventory.Originality/valueThe current review analyzed 419 research papers available in the literature on perishable inventory modeling to summarize its current status and identify its potential future directions. Also the future research gaps were uncovered. This systemic review is strongly felt to fill the gap in the perishable inventory literature and help in formulating effective strategies to design of an effective and efficient inventory management system for perishable items.

scholarly journals A Review of Landfill Leachate Treatment by Microalgae: Current Status and Future Directions

Processes ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 384 ◽  
Author(s):  
Tabish Nawaz ◽  
Ashiqur Rahman ◽  
Shanglei Pan ◽  
Kyleigh Dixon ◽  
Burgandy Petri ◽  
...  
Keyword(s):  
Solid Waste ◽  
Landfill Leachate ◽  
Scale Up ◽  
Resource Recovery ◽  
Current Status ◽  
Future Research ◽  
Potential Candidate ◽  
Leachate Treatment ◽  
Treatment Scenario ◽  
Environmental Footprints

Solid waste generation has been projected to increase worldwide. Presently, the most applied methodology to dispose of solid waste is landfilling. However, these landfill sites, over time release a significant quantity of leachate, which can pose serious environmental issues, including contamination of water resources. There exist many physicochemical and biological landfill leachate treatment schemes with varying degrees of success. With an increasing focus on sustainability, there has been a demand for developing eco-friendly, green treatment schemes for landfill leachates with viable resource recovery and minimum environmental footprints. Microalgae-based techniques can be a potential candidate for such a treatment scenario. In this article, research on microalgae-based landfill leachate treatments reported in the last 15 years have been summarized and critically reviewed. The scale-up aspect of microalgae technology has been discussed, and the related critical factors have been elucidated. The article also analyzes the resource recovery potential for microalgal techniques with respect to leachate treatment and explores possible methodologies to minimize the environmental footprints of the microalgae-based treatment process. The future research potential in the area has been identified and discussed.

scholarly journals A study of students’ travellers values and needs in order to establish futures patterns and insights

2015 ◽  
Vol 1 (2) ◽  
pp. 94-107 ◽  
Author(s):  
Elena Cavagnaro ◽  
Simona Staffieri
Keyword(s):  
Sustainable Tourism ◽  
Logistic Models ◽  
Travel Behaviour ◽  
Value Orientation ◽  
Tourism Industry ◽  
Future Perspective ◽  
Future Research ◽  
Content Type ◽  
The Future ◽  
Travel Needs

Purpose If the only viable future for tourism is sustainable tourism then ways should be sought to increase the demand for sustainable offers. The purpose of this paper is to explore whether sustainability values influence the travel needs of students. The aim is to discover cues in the present behaviour of young tourists that can enhance sustainable travel choices and therefore secure the future of the tourism industry. Moreover, the study provides a solid basis for predicting the future travel behaviour of young tourists. Design/methodology/approach Data were collected in The Netherlands in 2013 through a survey. A non‐probabilistic sample of 365 students (a sub‐group of young tourists) was reached. Multivariate analyses were used to test whether position in the social structure and value orientation influence the travel need. The logistic models allowed youth tourism behaviour to be predicted. Findings Respondents with a biospheric value orientation associate travel with being in contact with nature and chose rest as a motivation. This is highly interesting from a future perspective because biospheric values are considered the most stable antecedent of sustainable behaviour. Findings also highlight women's role as the sustainable tourists of the future: women harbour strong sustainability values and see travel as a growth opportunity. Research limitations/implications This research focuses on travel needs because this is the most future‐oriented phase of the tourism experience, and on students because they tend to travel independently. Future research might include travel consumption and evaluation as well as non‐students in the sample to give a more balanced view on young tourists. Future research might also include values not related to sustainability to assess their relative strengths in influencing youth tourism. Practical implications Both policy makers and industry could capitalise on the sustainability values already present in young people's need for travel to nudge this group – who represents tourism's future – towards a sustainable tourism choice. For example, strengthening sustainability values through marketing and education will increase demand for a sustainable offer. Originality/value Values related to sustainability influence general tourism choices by young travellers, and not only choices related to a sustainability offer. This finding suggests a path to address the classic dilemma between individualism and sustainability and assure tourism's future by showing young travellers that they already harbour sustainability values.

The Current Status of EMDR Therapy, Specific Target Areas, and Goals for the Future

2020 ◽  
Vol 14 (4) ◽  
pp. 241-284
Author(s):  
Suzy J. M. A. Matthijssen ◽  
Christopher W. Lee ◽  
Carlijn de Roos ◽  
Ian G. Barron ◽  
Ignacio Jarero ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Treatment Guidelines ◽  
Unipolar Depression ◽  
Evidence Base ◽  
Current Status ◽  
Future Research ◽  
The Future ◽  
Working Groups ◽  
Emdr Therapy

While eye movement desensitization and reprocessing (EMDR) is considered an evidence-based treatment for posttraumatic stress disorder (PTSD) in adults, there are differences as to how various international treatment guidelines judge the strength of this evidence base. Furthermore, in areas other than adult PTSD, major guidelines differ even more as to the strength of the evidence base and when to use EMDR. In 2019, the Council of Scholars: The Future of EMDR Therapy Project was initiated. Several working groups were established, with one assigned to the focus area of research. This article is a product of that working group. Firstly the group concluded that there were five areas where there was some base that EMDR was effective, but more data were needed to increase the likelihood that it would be considered in future international treatment guidelines. These areas were PTSD in children and adolescents, early EMDR interventions, combat PTSD, unipolar depression, and chronic pain. In addition, research into cost-effectiveness of EMDR therapy was identified as one of the priorities. A hierarchical system was used for classifying and rating evidence in the focus areas. After assessing the 120 outcome studies pertaining to the focus areas, we conclude that for two of the areas (i.e., PTSD in children and adolescents and EMDR early interventions research) the strength of the evidence is rated at the highest level, whereas the other areas obtain the second highest level. Some general recommendations for improving the quality of future research on the effectiveness of EMDR therapy are formulated.

scholarly journals Assessment of the current status of waste sludge treatment of the industrial parks in Binh Duong Province

2020 ◽  
pp. 435-441
Keyword(s):  
Wastewater Treatment ◽  
Industrial Waste ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Current Status ◽  
Industrial Park ◽  
Sludge Treatment ◽  
Waste Sludge ◽  
Helminth Eggs ◽  
Industrial Parks

Study on sampling sludge from 04 industrial parks in Binh Duong province such as My Phuoc, Dong An, Viet Huong 1, Song Than 2 to analyze the pollution criteria to assess the pollution possibility of industrial waste sludge. The research results show that: at present, the total volume of sludge generated today in the industrial park fluctuates about 4,450 – 6,255 kg/day, equivalent to dry sludge volume is 1,035.725 – 1,532.11 kg/day. The estimated volume of dry sludge generated from industrial parks in the future from 2019 to 2020 ranges from 30,023 to 31,396 kg/day. Most sludge from 04 wastewater treatment plants hadn’t heavy metals (Hg, Pb, Cu, Ni, Cr, Zn, Cd), especially Dong An Industrial park Treatment plant had Zn, value 49.7 – 49.9 mg/l. The sludge from the wastewater treatment plants of 04 industrial parks had amount of helminth eggs that exceeds the USEPA's regulations on pathogens (type A sludge).

scholarly journals E-Waste: Current Research and Future Perspective on Developing Countries

2020 ◽  
Vol 1 (2) ◽  
pp. 25
Author(s):  
L. Halim ◽  
Y. Suharyanti
Keyword(s):  
Waste Treatment ◽  
Electrical Equipment ◽  
Literature Survey ◽  
Current Status ◽  
Future Perspective ◽  
Future Research ◽  
Waste Generation ◽  
Waste Production ◽  
Open Access Journals ◽  
Specific Country

Increase of population, purchasing power, and development of technology give consequence to Waste of Electronic and Electrical Equipment (WEEE) or e-waste generation. Increasing rate of e-waste production and its hazardous content raise the concern regarding e-waste. This paper aims to describe the research development on e-waste in various countries and propose the perspective of future research. The study based on literature survey in open access journals using ‘e-waste’ as the keyword. Article selection was done by considering the reputability of the source and cited frequency. From the articles reviewed, China contributed to most of the researches. Some of most studied topic namely e-waste management, e-waste impact to human health and environment and current status of e-waste treatment in specific country. Brief explanation on each topic and insight on future research are also provided. 

scholarly journals From waste treatment to resource recovery: A Chicago sustainability story

2017 ◽  
Vol 4 ◽  
Author(s):  
Debra Shore
Keyword(s):  
Wastewater Treatment ◽  
Lake Michigan ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Resource Recovery ◽  
Waste Products ◽  
Sewage Treatment Plants ◽  
The Past ◽  
The Future ◽  
Power Centers

ABSTRACTThe development of Chicago and northeastern Illinois has been intimately tied to water, particularly Lake Michigan and the Chicago Area Waterways. The wastewater treatment plants of the past will become the power centers of the future by harnessing resources—including nutrients, energy, solids, and water itself—to bolster the economy and ensure regional sustainability.The story of Chicago’s development is inextricably linked to its relationship with the natural environment, beginning 16,000 years ago when the land was covered and compressed by an enormous glacier. Ever since, urban planners and policymakers have grappled with how to manage a city built on flat, swampy land, and what to do with the animal and human waste that accumulates in urban environments. During the 19th and 20th centuries, the solution was to move waste as far away from the area as possible. The Chicago River, which originally flowed into Lake Michigan, was converted into an open sewer and reversed, sending the flow—and all the wastes dumped into it—downstream. Over the 20th century, sewage treatment plants were constructed to minimize the potential for harm to humans and the environment. Now, however, our thinking is changing. Rather than discarding waste products, wastewater treatment plants are beginning to recover the resources that flow through them—including nutrients, energy, solids, and water—and transform them into assets that generate revenue and protect the environment. This potential for resource recovery means that the sewage treatment plants of the past will become the power centers of the future.

Perspectives on modelling micropollutants in wastewater treatment plants

2013 ◽  
Vol 68 (2) ◽  
pp. 448-461 ◽  
Author(s):  
Ludiwine Clouzot ◽  
Jean-Marc Choubert ◽  
Frédéric Cloutier ◽  
Rajeev Goel ◽  
Nancy G. Love ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Model Development ◽  
Transformation Products ◽  
Current Status ◽  
Future Research ◽  
Engineering Practice ◽  
Wide Range ◽  
Receiving Waters ◽  
The Impact

Models for predicting the fate of micropollutants (MPs) in wastewater treatment plants (WWTPs) have been developed to provide engineers and decision-makers with tools that they can use to improve their understanding of, and evaluate how to optimize, the removal of MPs and determine their impact on the receiving waters. This paper provides an overview of such models, and discusses the impact of regulation, engineering practice and research on model development. A review of the current status of MP models reveals that a single model cannot represent the wide range of MPs that are present in wastewaters today, and that it is important to start considering classes of MPs based on their chemical structure or ecotoxicological effect, rather than the individual molecules. This paper identifies potential future research areas that comprise (i) considering transformation products in MP removal analysis, (ii) addressing advancements in WWTP treatment technologies, (iii) making use of common approaches to data acquisition for model calibration and (iv) integrating ecotoxicological effects of MPs in receiving waters.

scholarly journals Operation and Performance of Austrian Wastewater and Sewage Sludge Treatment as a Basis for Resource Optimization

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 2998
Author(s):  
Arabel Amann ◽  
Nikolaus Weber ◽  
Jörg Krampe ◽  
Helmut Rechberger ◽  
Ottavia Zoboli ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Resource Recovery ◽  
Contaminant Removal ◽  
Sludge Treatment ◽  
Additional Function ◽  
Current State ◽  
Sewage Sludge Treatment ◽  
P Recovery ◽  
And Performance

Recent years came with a paradigm shift for wastewater treatment plants (WWTPs) to extend the sole purpose of contaminant removal to an additional function as resource recovery facilities. This shift is accompanied by the development of new European legislation towards better inclusion of resource recovery from wastewater. However, long operational lifespans and a multitude of treatment requirements demand thorough investigations into how resource recovery can be implemented sustainably. To aid the formulation of new legislation for phosphorus (P) recovery specifically, in 2017 we conducted a survey on Austrian WWTP-infrastructure, with a focus on P removal and sludge treatment, as well as disposal and sludge quality of all WWTPs above 2000 population equivalents (PE). Data were prepared for analysis, checked for completeness and cross-checked for plausibility. This study presents the major findings from this database and draws essential conclusions for the future recovery of P from wastewater. We see results from this study as useful to other countries, describing the current state of the art in Austria and potentially aiding in developing wastewater treatment and P recovery strategies.

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