| 1. |
- Cardoso Chrispim, Mariana, Postdoktor, 1990-, et al.
(författare)
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Phosphorus recovery from municipal wastewater treatment : Critical review of challenges and opportunities for developing countries
- 2019
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Ingår i: Journal of Environmental Management. - Amsterdam : Elsevier. - 0301-4797 .- 1095-8630. ; 248
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Forskningsöversikt (refereegranskat)abstract
- The aim of this paper is to provide guidance in selecting phosphorus recovery options within the municipal wastewater treatment sector regarding developing countries. This critical review includes a brief contextualization of the resource-oriented sanitation paradigm, the discussion of processes for phosphorus recovery based on methods at full-scale, pilot-scale and laboratory-scale, and a concise discussion of the environmental impacts and benefits associated with phosphorus recovery strategies. Finally, the main challenges related to the implementation of resource recovery strategies, especially for phosphorous, were identified and discussed. According to the results, some of the main drivers for phosphorus recovery are the limited availability of phosphorus, increasing cost of phosphate fertilizers and reduction of maintenance costs. Currently, most of the operational processes are based on crystallization or precipitation from the digester supernatant. Struvite is the most common recovered product. The recovery rate of phosphorus from the liquid phase is lower (10–60% from wastewater treatment plant influent), than from sludge (35–70%) and from sludge ashes (70–98%). Phosphorus recovery remains challenging, and some barriers identified were the integration between stakeholders and institutions, public policies and regulations as well as public acceptance and economic feasibility. In developing countries, the implementation of nutrient recovery systems is challenging, because the main concern is on the expansion of sanitation coverage. Resource recovery approaches can provide benefits beyond the wastewater treatment sector, not only improving the sustainability of wastewater treatment operations, but generating revenue for the utility provider.
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| 2. |
- Barth, Henrik, 1971-, et al.
(författare)
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A Green Lean approach to global competition and climate change in the agricultural sector – A Swedish case study
- 2018
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Ingår i: Journal of Cleaner Production. - Amsterdam : Elsevier. - 0959-6526 .- 1879-1786. ; 204, s. 183-192
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Tidskriftsartikel (refereegranskat)abstract
- Increased global competition in the agricultural sector is rapidly changing the structure of farms and farming. As the number of small and diversified farms (often family-owned) decreases, the number of large and specialized farms (often corporate-owned) is increasing. In this transformation, the agricultural sector is more and more concerned with strategy, innovation, and competition in the effort to be more productive and more profitable. At the same time, the sector faces demands that it become more environmentally responsible in its policies and practices. This paper proposes a Lean Implementation Framework that small and mid-size farms can use as they aim to increase production and profit and yet support environmental sustainability. This case study takes an action-oriented research approach that focuses on the implementation of a Green Lean approach at 34 Swedish farms using various Lean tools. The paper describes how training sessions, farm visits, workshops, and counseling were used to introduce the farmers to the benefits and risks of the implementation of a new business model that added Green elements to the traditional business model design. The paper concludes with recommendations for adaptations to the Framework and suggestions for future research. © 2018
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| 3. |
- Barth, Henrik, 1971-, et al.
(författare)
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Sustainable Development for Food Waste : A Case Study of Catered Meal Service at Schools and Elderly Care homes
- 2019
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Ingår i: Journal of Strategic Innovation and Sustainability. - West Palm Beach, FL : North American Business Press. - 1718-2077. ; 14:2, s. 21-34
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Tidskriftsartikel (refereegranskat)abstract
- Food waste is an important topic in the context of sustainable development. Although many studies have addressed this topic, there is still limited knowledge owing to insufficient data. This study reports on food waste in two institutional settings in a Swedish municipality: schools and elderly care homes. The findings suggest it is easier to measure and reduce food waste in stable environments, such as exist at schools, than at environments characterized by change and unpredictability, such as exist at elderly care homes. Specific areas examined and compared include cooking and receiving kitchens, infrastructure, communications, and support. © North American Business Press.
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| 4. |
- Cardoso Chrispim, Mariana, Postdoktor, 1990-, et al.
(författare)
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A framework for resource recovery from wastewater treatment plants in megacities of developing countries
- 2020
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Ingår i: Environmental Research. - Maryland Heights : Academic Press. - 0013-9351 .- 1096-0953. ; 188
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Tidskriftsartikel (refereegranskat)abstract
- In developing countries, there is often a lack of a comprehensive data set that supports the development of coherent policies on resource recovery from wastewater treatment. This paper aims to contribute to the elaboration of resource recovery projects by providing accurate and updated data from wastewater treatment plants such as those located in the region of the Macrometropolis of Sao Paulo. The authors discuss possibilities of improvement of resource recovery for this illustrative example. Comprehensive analyses were performed based on data from 143 municipal wastewater treatment plants to understand the situation regarding resource recovery implementation in this region. The results show that just 26% of the plants perform at least one resource recovery practice. The predominant resource recovery practice is internal water reuse, and recovery is concentrated more in large plants than in medium and small ones. The sludge is disposed in landfills except for three plants, which perform sludge recycling for compost. Some plant managers reported interest in recovering energy from biogas, in expanding water reuse and in recovering sludge for fertilizer production or for building materials. Several aspects that have been regarded as relevant to the implementation of resource recovery processes in previous literature are discussed, such as the size of the plant, related legislation as well as treatment technologies and configurations. Finally, the authors propose a generic framework with several steps that can help to achieve resource recovery implementation. Therefore, the results can provide support for planning of resource recovery projects for large cities in developing countries. © 2020 Elsevier Inc.
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| 5. |
- Cardoso Chrispim, Mariana, Postdoktor, 1990-
(författare)
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Evaluation of decentralized approaches to wastewater treatment systems as alternative to environmental impacts and indication of sustainable solution for water conservation in cities
- 2017. - 1
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Ingår i: Proceedings of the Regional Workshop Wastewater Treatment and Reuse for Metropolitan Regions and Small Cities in Developing Countries. - Göttingen : Cuvillier Verlag. - 9783736994546 ; , s. 28-37
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Konferensbidrag (refereegranskat)abstract
- The Millennium Development Goals aim to achieve the sustainable development and to contribute improving access to water supply, sanitation, and energy, and to reduce hunger in the world. Energy and water are essential resources for food production, however, are becoming scarce. In this context an integration of the complete water management cycle includes water conservation and reclamation, storage of reclaimed water and rainwater, and wastewater treatment mainly in decentralized models. Wastewater treatment systems can generate products such as: renewable energy, fertilizers and water. This study focuses on the relations between wastewater treatment systems and its environmental impacts, besides to indicate potential solutions. In addition, it is also presented results from an experimental greywater treatment system operated at the university. The objective of this study was to address some Brazilian experiences of centralized wastewater treatment plant (large scale) and decentralized wastewater treatment plant (small scale). We expect that the results of this study can offer a review of strategies of wastewater treatment to implement in urban areas in Brazil, and to create subsidies for the planning of new wastewater treatment plants with low environmental impacts, including sustainable solutions (e.g., water reuse).
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| 6. |
- Cardoso Chrispim, Mariana
(författare)
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Resource recovery from wastewater treatment: challenges, opportunities and guidance for planning and implementation
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Considering the current resources scarcity, Wastewater Treatment Plants (WWTP) should be adapted to become more sustainable. For example, it is possible to recover resources present in municipal wastewater. However, regional studies about integration of resource recovery processes at different scales or about the main barriers to implementation in developing countries are missing in the literature. Also, there is a need for planning methodologies to identify the most sustainable solution in each context. Understanding the current situation is an essential step to support planning and accelerate resource recovery implementation. To address these issues this thesis aims to guide planning, technology and policy development towards resource recovery from municipal WWTP in large cities of developing countries. This thesis presents a comprehensive knowledge base for wastewater treatment plant managers and decision-makers leading to a better understanding of resource recovery solutions and the actions needed to facilitate implementation. The methodology comprised critical literature reviews and two case studies. Secondary data from literature and primary data (obtained through questionnaires) were collected and analysed. Megacities in developing countries are analysed in the papers, with the focus on the Macrometropolis of Sao Paulo, which is the most populous area in the Southern Hemisphere. The current situation shows a low implementation of resource recovery practices in the region, and local conditions affect the implementation of water reuse, and nutrients and energy recovery. A framework consisting of eleven steps is proposed to support planning and decision-making on resource recovery from wastewater. This new tool was tested and can be applied by decision-makers in wastewater sector for better operation and management. Market, legislation, local economic development, and cooperation with stakeholders are relevant aspects covered in the analysis. There is a great potential to expand wastewater treatment integrated with nutrient and energy recovery strategies in developing countries. Potentials for phosphorus and energy recovery were estimated and some recovery scenarios are recommended. In conclusion, the findings can help planning and elaboration of resource recovery projects in wastewater treatment in urban areas and stimulate creation of public policies. The main research gaps identified in this thesis can guide further research and technological development in this field.
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| 7. |
- Cardoso Chrispim, Mariana, Postdoktor, 1990-, et al.
(författare)
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The sanitation and urban agriculture nexus : urine collection and application as fertilizer in São Paulo, Brazil
- 2017
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Ingår i: Journal of Water, Sanitation and Hygiene for Development. - London : IWA Publishing. - 2043-9083 .- 2408-9362. ; 7:3, s. 455-465
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Tidskriftsartikel (refereegranskat)abstract
- Separately collected urine is an attractive potential fertilizer because of its high nutrient content, low cost, and inherent linkage of urban wastewater management and peri-urban agriculture. Urine from waterless urinals was applied to corn and lettuce plants to examine the impact of urine application rates and frequency on plant growth and soil parameters. In both corn and lettuce experiments, urine application significantly (p < 0.05) increased growth and leaf production relative to control plants. More frequent applications led to lower soil cation exchange capacities for corn and higher soil nitrogen content for both crops. Based on preliminary implementation calculations, waterless urinals at the University of São Paulo (USP), School of Arts, Sciences, and Humanities campus could lead to over 1,500 m3 of water saved and 360 m3 of urine produced on an annual basis. These experiments and modeling results are discussed in the context of scaling up urban urine collection, transport, and fertilization in São Paulo, Brazil.
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| 8. |
- Cardoso Chrispim, Mariana, Postdoktor, 1990-, et al.
(författare)
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The underrepresented key elements of Circular Economy : A critical review of assessment tools and a guide for action
- 2023
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Ingår i: Sustainable Production and Consumption. - Amsterdam : Elsevier. - 2352-5509. ; 35, s. 539-558
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Tidskriftsartikel (refereegranskat)abstract
- The measurement of progress towards Circular Economy (CE) within a company is crucial for identifying opportunities and designing circular practices. However, most of the existing tools do not consider the systemic view and principles of CE. The aim of this paper is to assess the contributions and limitations of CE assessment tools regarding the key elements: social dimension, stakeholder engagement, R-imperatives and industrial symbiosis. Also, the aim is to offer guidance for improvements towards a CE transition. The methodology was an integrative literature review; then based on the critical assessment of tools a guide was created. Thirty-eight tools were thoroughly analysed and our results show that there is a limited number of multidisciplinary tools (only 10), that is including all CE key elements, and in some cases partly. Social dimension is not fully explored; only 6 tools have indicators related to society, local community, customers, and workers. Recommendations for future tools development include to offer training for possible users of the tools and to develop tools for the service sector. Finally, we conclude that all the key elements of CE are interconnected. The proposed guide-ACTION (Assessing Circular Transition In Organisations Now)- includes the key elements, databases, tools, and indicators, and is aligned with the CE principles to help the assessment. © 2022 The Author(s)
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| 9. |
- Karlsson, Niklas, 1985-
(författare)
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Doing well by doing good : The business model innovation process for sustainability in farm-based biogas production
- 2019
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Research on innovation that leads to change and adaptation in dynamic business environments has increased rapidly in recent decades. This doctoral thesis, which focuses on business model innovation (BMI), contributes to that research with its examination of how businesses can alter their structures to create, deliver, and capture greater economic value as well as environmental and social value. The overarching aim of the thesis is to explore how the business model innovation process for sustainability (BMIpfS) can contribute to profitable biogas production at Swedish farm businesses. Biogas, which is a renewable energy resource produced from microbial decomposition of organic material in an oxygen free environment, can be used to produce heat, electricity, or vehicle fuel. The thesis examines the initiation, implementation, and use of the BMIpfS at biogas-producing farms in ways that support the development of business models for sustainability (BMfS). In addition to economic value, a BMfS enables farm businesses and external stakeholders (e.g., municipalities and local companies) to capture environmental value and social value from biogas production and create business cases for sustainability (BCfS) that can improve biogas profitability.Both an inductive and deductive reasoning approach is taken in this research that is presented in a case study, two action research studies, and two survey studies. The case study identifies and describes various success factors for BMI for sustainability in a biogas network. The action research studies explore how BMI process can be modified to address sustainability considerations and the outcomes useful for supporting stakeholder collaboration and facilitating the development of a BMfS. The survey studies investigate how the farm businesses’ corporate sustainability strategies and stakeholder considerations influence the development of BMfS and the creation of BCfS. All studies were conducted at farm businesses in Sweden. The data were collected in interviews, workshops, and questionnaires.The results from this research show that BMI for sustainability takes place in three main phases: the pre-phase, the ongoing phase, and the post-phase. Based on these three phases, the BMIpfS Framework is developed. The Framework illustrates how a business model (BM) can be changed and adapted to realize sustainable value creation. Several factors determine the success of the BMIpfS Framework at biogas-producing farm businesses. In the pre-phase, these factors include a long-term perspective on biogas profitability, integration of sustainability considerations into business strategies, promotion of cooperation with customers, and the establishment of interactions with the consumer markets. Use of the Flourishing Business Canvas tool in the ongoing phase can enhance external stakeholders’ understanding of BMs and BMI, and can promote idea generation for the BMfS. Sustainability-oriented BM prototypes are used in the post-phase to support network collaboration in development of BMfS and in the creation of BCfS, both of which are intended to increase biogas profitability by solving sustainability issues.This thesis contributes to the literature with its findings on how the BMIpfS Framework can be used in organizational changes. These findings show how an organization can move from its existing BM to a more sustainability-oriented BM. The thesis identifies the internal and external antecedents related to the initiation and implementation of the BMIpfS and offers new insights on the development of BMfS through the integration of sustainability considerations using business modelling tools that facilitate BM experimentation and stakeholder collaboration. Moreover, the thesis explains how use of the BMIpfS Framework can create sustainability-oriented BM prototypes that enhance network BM collaboration with stakeholders in the value chain (i.e. BMfS development and BCfS creation). As far as practical contributions, the thesis highlights the usefulness of the BMIpfS Framework in farm-based biogas production. With the BMIpfS Framework, the thesis presents a structured approach that practitioners can follow in initiating and implementing sustainability-oriented changes to their existing BMs. Practitioners who want to increase the profitability of their biogas production through sustainability should initially focus their BMI activities on the business infrastructure (key partner identification and interaction) and customer interface (relationships, distribution channels, and segments) of existing BMs.This thesis ultimately concludes that biogas-producing farm businesses should initiate and implement a BMIpfS that leads to economic, environmental, and social value creation. Stakeholder considerations and interactions are key factors in all phases of BMIpfS. In this process, sustainable business modelling tools and BM prototype development can be used to facilitate incremental sustainability-oriented changes to existing BMs. The BMIpfS Framework has an important role for the development and implementation of BMfS in the biogas industry as a contributor to the circular economy that features renewable and sustainable energy systems.
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| 10. |
- Perry, William Bernard, et al.
(författare)
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Cross-continental comparative experiences of wastewater surveillance and a vision for the 21st century
- 2024
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Ingår i: Science of the Total Environment. - Amsterdam : Elsevier. - 0048-9697 .- 1879-1026. ; 919
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Tidskriftsartikel (refereegranskat)abstract
- The COVID-19 pandemic has brought the epidemiological value of monitoring wastewater into sharp focus. The challenges of implementing and optimising wastewater monitoring vary significantly from one region to another, often due to the array of different wastewater systems around the globe, as well as the availability of resources to undertake the required analyses (e.g. laboratory infrastructure and expertise). Here we reflect on the local and shared challenges of implementing a SARS-CoV-2 monitoring programme in two geographically and socio-economically distinct regions, São Paulo state (Brazil) and Wales (UK), focusing on design, laboratory methods and data analysis, and identifying potential guiding principles for wastewater surveillance fit for the 21st century. Our results highlight the historical nature of region-specific challenges to the implementation of wastewater surveillance, including previous experience of using wastewater surveillance, stakeholders involved, and nature of wastewater infrastructure. Building on those challenges, we then highlight what an ideal programme would look like if restrictions such as resource were not a constraint. Finally, we demonstrate the value of bringing multidisciplinary skills and international networks together for effective wastewater surveillance. © 2024. Published by Elsevier B.V.
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