scholarly journals Upgrading of Food Waste in-vessel Composting Process: Effects of Biochar-rich Digestate Addition

2020 ◽  
Author(s):  
Nour El houda Chaher ◽  
Abdallah Nassour ◽  
Michael Nelles ◽  
Moktar Hamdi
Keyword(s):  
Moisture Content ◽  
Food Waste ◽  
Solid Waste Management ◽  
Point Of View ◽  
The Other ◽  
Composting Process ◽  
Anaerobic Reactors ◽  
Other Hand ◽  
Process Effects ◽  
Nitrification Index

Abstract Nowadays, Tunisia faces challenging environmental and energic issues which concern mainly the implementation of an appropriate solid waste management system dealing with the high production of biowaste in one hand and the increased need for water and energy resources in the other hand. Therefore, the current study intended to develop a technical concept on closed cycle ‘biowaste to bioenergy’, treating mainly food waste (FW) through combined biological processes. In this approach, FW anaerobic digestion (AD) residue was destined to feed FW in vessel-composting as a valuable input material. To this end, the produced digestates from amended and unamended anaerobic reactors were entirely examined to select later the most appropriate AD-effluent. Therefore, the identification of the convenient digestate was achieved based on technical criteria ; moisture content (MC), C : N ratio and heavy metals concentrations. The findings showed that the digestate obtained from different digesters was characterized by a high moisture content which inspired its utilization as an unconventional moisturizing agent (MA) reducing the fresh water consumption during the composting process. Because of the high C : N ratio, relatively significant rate of the needed macro and micro-nutrients, the exploitation of biochar-rich digestate was recomended to be used as an unconventional MA in one hand and an aerobic co-substrate booster in the other hand. Results showed that D3 addition promoted the composting process performance comparing to the blank test (A1). Indeed, the thermophilic phase of the amended reactor (A2) lasted 15 days and reached higher temperatures of about 67 °C, while the unamended one (A1) was characterized by a thermophilic temperature of around 63 °C indicating that the end-products were of a pathogen-free compost. When it comes to the physico-chemical factors examined demonstrating that the biological conditions were sufficiently developed. The findings showed overall decreasing profiles during the composting period for moisture, C : N ratio as well as nitrification index (NI). From the quality-point of view, it was found that heavy metal concentrations had lower limits than those values set by German standards. Moreover, all the compost samples appeared to be stable and classified as class IV and V end-product.

scholarly journals From anaerobic to aerobic treatment: upcycling of digestate as a moisturizing agent for in-vessel composting process

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Nour El Houda Chaher ◽  
Safwat Hemidat ◽  
Mehrez Chakchouk ◽  
Abdallah Nassour ◽  
Moktar Hamdi ◽  
...  
Keyword(s):  
Food Waste ◽  
Rural Areas ◽  
Waste Treatment ◽  
C:N Ratio ◽  
Point Of View ◽  
Composting Process ◽  
Anaerobic Reactors ◽  
Physico Chemical ◽  
Nitrification Index ◽  
Urban And Rural Areas

AbstractIn Tunisia, there are crucial challenges facing both urban and rural areas, the most prominent of which are the production of organic waste, the need for waste treatment, the demand for water and energy and the need for a circular economy. To this end, the study was designed to develop a technical concept on closed cycle ‘biowaste to bioenergy’ treating, basically food waste (FW) through combined biological processes. In this approach, the generated digestate from FW anaerobic reactors was used successfully as a moisturizing agent for FW in-vessel composting. Four types of digestate were examined to be used as moisturizing agent (MA). The selection of the appropriate MA was achieved based on technical criteria; moisture content (MC), C:N ratio and heavy metals concentrations. The findings showed that the digestate obtained from anaerobic co-digestion of food waste and wheat straw (D1) was the most efficient AD-effluent to be added. In terms of composting process performance, the thermophilic phase of the amended reactor (A1) lasted 16 days and reached higher temperatures of about 72 °C, while the unamended one (A1) was characterized by a thermophilic temperature of around 66 °C indicating that the end products were of a pathogen-free compost. When it comes to the physico-chemical factors examined demonstrating that the biological conditions were sufficiently developed. The findings showed overall decreasing profiles during the composting period for moisture, C:N ratio as well as nitrification index (NI). From the quality-point of view, it was found that heavy metal concentrations had lower limits than those values set by German standards. Moreover, all the compost samples appeared to be stable and classified as class IV and V end product.

scholarly journals From Anaerobic to Aerobic Treatment: Upcycling of Digestate as a Moisturizing Agent for in-vessel Composting Process

2020 ◽  
Author(s):  
Nour El houda Chaher ◽  
Safwat Hemidat ◽  
Mehrez Chakchouk ◽  
Abdallah Nassour ◽  
Moktar Hamdi ◽  
...  
Keyword(s):  
Food Waste ◽  
Rural Areas ◽  
Waste Treatment ◽  
Point Of View ◽  
Composting Process ◽  
Anaerobic Reactors ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Nitrification Index ◽  
Urban And Rural Areas

Abstract In Tunisia, there are crucial challenges facing both urban and rural areas, the most prominent of which are the production of organic waste, the need for waste treatment, the demand for water and energy and the need for a circular economy. To this end, the study was designed to develop a technical concept on closed cycle ‘biowaste to bioenergy’ treating, basically food waste (FW) through combined biological processes. In this approach, the generated digestate from FW anaerobic reactors was used successfully as a moisturizing agent for FW in vessel-composting. Four types of digestate were examined to be used as moisturizing agent (MA). The selection of the appropriate MA was achieved based on technical criteria ; moisture content (MC), C : N ratio and heavy metals concentrations. The findings showed that the digestate obtained from anaerobic co-digestion of food waste and wheat straw (D1) was the most efficient AD-effluent to be added. In terms of composting process performance, the thermophilic phase of the amended reactor (A1) lasted 16 days and reached higher temperatures of about 72°C, while the unamended one (A1) was characterized by a thermophilic temperature of around 66°C indicating that the end-products were of a pathogen-free compost. When it comes to the physico-chemical factors examined demonstrating that the biological conditions were sufficiently developed. The findings showed overall decreasing profiles during the composting period for moisture, C : N ratio as well as nitrification index (NI). From the quality-point of view, it was found that heavy metal concentrations had lower limits than those values set by German standards. Moreover, all the compost samples appeared to be stable and classified as class IV and V end-product.

Digital platforms: mapping the territory of new technologies to fight food waste

2020 ◽  
Vol 122 (5) ◽  
pp. 1647-1669 ◽  
Author(s):  
Massimo Cane ◽  
Carmen Parra
Keyword(s):  
Food Waste ◽  
New Technologies ◽  
Point Of View ◽  
The Other ◽  
Theoretical Point ◽  
Content Type ◽  
Digital Platforms ◽  
Other Hand ◽  
Short Period ◽  
Responsible Consumption

PurposeThe reduction of food waste is still a pending issue that governments have still not resolved. In response to this problem mobile platforms are emerging that follow food ecology and the responsible consumption of food, and self-management of their access to allow the communication between people and their use of food. In this paper, the authors will analyze the main digital platforms that deal with solving this problem, especially those that fulfill a social commitment through the distribution and reduction of waste.Design/methodology/approachTo provide solutions, the authors will address the importance of new technologies in the fight against waste, using digital platforms to manage food and to eliminate the loss in surplus products. To do this, the authors will first analyze from a theoretical point of view the concepts of “loss”, “waste” and “surplus product”, incorporating data of their impact between Spain and Italy. Next, the authors will analyze the influence of new technologies in the detection and distribution of products destined to become food waste. To carry out this qualitative research, the authors will apply the research strategy of theory building from multiple case studies (particularly 16 different digital platforms against food waste were analyzed), which is a methodological approach that uses cases as the basis to develop theory inductively.FindingsThe authors must make the public aware of the importance of being responsible consumers. To this end, the authors must disclose the problems associated with food waste and surplus product, presenting alternatives and new consumption habits. For this, it is necessary to collaborate and build synergies with organizations of different origins (consumers, producers and activists) involved in sustainable agrifood models. In this sense, digital platforms are essential tools to fight against food waste, preventing certain products from being considered unfit for human consumption. In this study, the authors suggest that, based on the review of the literature and the analysis of apps and blogs, the authors look for solutions to surplus and food waste both from the environment of the entrepreneur and the consumer and all using the new technologies.Research limitations/implicationsThe research has raised different limitations. On the one hand, it is a subject that has not been analyzed from a doctrinal point of view, so it is not easy to find bibliographic references. On the other hand, digital platforms that act on food waste are not cataloged. This has made it difficult to search for elements of analysis to obtain results in the work. Finally, the sample can vary in a short period of time since the digital platforms are in a boom, which means that they constantly change.Practical implicationsThis work allows a theoretical approach to the concepts of “loss”, “wastage” and “surplus product”, incorporating data on its impact in Spain and Italy, comparing it with the rest of Europe while providing figures and data on their impact. On the other hand, it allows us to know how new technologies can help the detection and distribution of products destined to become food waste. Finally, there are examples of platforms that are offering service in different areas, incorporating a novel classification that allows us to know the differences depending on their origin and destination.Originality/valueThe originality of the work can be summarized in the following points: There are no doctrinal works that analyze in a combined way the food waste with the new technologies; The relationship with the 2030 Agenda in which responsible consumption is one of the achievements pursued by the United Nations, and the authors position the study’s research as an evidence of platforms that are currently working in the interest of reducing food waste. Furthermore, the authors provide an early classification of platforms based on their usability and objectives of reducing, reusing and recycling food.

Can the Academic Self-Concept be Positive and Realistic?

2005 ◽  
Vol 19 (3) ◽  
pp. 129-132 ◽  
Author(s):  
Reimer Kornmann
Keyword(s):  
Academic Performance ◽  
Opposite Effect ◽  
Self Esteem ◽  
Point Of View ◽  
The Other ◽  
Self Concept ◽  
High Ability ◽  
Self Image ◽  
Other Hand

Summary: My comment is basically restricted to the situation in which less-able students find themselves and refers only to literature in German. From this point of view I am basically able to confirm Marsh's results. It must, however, be said that with less-able pupils the opposite effect can be found: Levels of self-esteem in these pupils are raised, at least temporarily, by separate instruction, academic performance however drops; combined instruction, on the other hand, leads to improved academic performance, while levels of self-esteem drop. Apparently, the positive self-image of less-able pupils who receive separate instruction does not bring about the potential enhancement of academic performance one might expect from high-ability pupils receiving separate instruction. To resolve the dilemma, it is proposed that individual progress in learning be accentuated, and that comparisons with others be dispensed with. This fosters a self-image that can in equal measure be realistic and optimistic.

A Nabatean port on the Red Sea: note on the pottery finds from al-Qusayr (al-Wajh, Saudi Arabia)

2020 ◽  
Author(s):  
Caroline Durand
Keyword(s):  
Saudi Arabia ◽  
19Th Century ◽  
Red Sea ◽  
Point Of View ◽  
The Other ◽  
Trade Routes ◽  
Other Hand ◽  
Roman Egypt ◽  
Pottery Sherds ◽  
First Time

Al-Qusayr is located 40 km south of modern al-Wajh, roughly 7 km from the eastern Red Sea shore. This site is known since the mid-19th century, when the explorer R. Burton described it for the first time, in particular the remains of a monumental building so-called al-Qasr. In March 2016, a new survey of the site was undertaken by the al-‘Ula–al-Wajh Survey Project. This survey focused not only on al-Qasr but also on the surrounding site corresponding to the ancient settlement. A surface collection of pottery sherds revealed a striking combination of Mediterranean and Egyptian imports on one hand, and of Nabataean productions on the other hand. This material is particularly homogeneous on the chronological point of view, suggesting a rather limited occupation period for the site. Attesting contacts between Mediterranean merchants, Roman Egypt and the Nabataean kingdom, these new data allow a complete reassessment of the importance of this locality in the Red Sea trade routes during antiquity.

scholarly journals The Difficult alliance. Military cooperation between the ruthenian king Daniel and the Piasts of Mazovia

2020 ◽  
Vol 1 (1) ◽  
pp. 104-112
Author(s):  
Michał Skoczyński
Keyword(s):  
Scientific Literature ◽  
Point Of View ◽  
Armed Conflicts ◽  
The Other ◽  
Political Strategy ◽  
Military Cooperation ◽  
Historical Sources ◽  
Other Hand ◽  
Historical Methodology ◽  
The Military

Abstract The article presents the military cooperation between the King of Galician-Volhynian Ruthenia, Daniel Romanowicz, and the Dukes of Mazovia, Konrad and his son Siemowit. The alliance, based as a counterweight for the cooperation between the King of Hungary and the Piast princes of Lesser Poland, who were trying to conquer Ruthenia and dominate all Piast principalities in then fragmented Poland. It lasted for several decades from the 1220’s to the 1260’s and was primarly aimed at mutual protection against the invasions of the pagan Yotvingians and supporting each other in armed conflicts. The text contains an analysis of war expeditions, tactics and ways of support that were given by both sides of the allianace. It is a new point of view on this aspect of political strategy of both sides that in some ways defined the regional situation. Ruthenians granted masovian Piasts some mobile and political uncommited support in fight with their relatives in Poland, and also secured their border with the Yotvingians. On the other hand, masovian knights were an additional strike force in ruthenian plundering expeditions to Yotvingia. The research was based on the analysis of preserved historical sources and scientific literature using historical methodology.

scholarly journals Health and Illness as Enacted Phenomena

Topoi ◽  
2021 ◽  
Author(s):  
Fredrik Svenaeus
Keyword(s):  
Good Life ◽  
Point Of View ◽  
The Other ◽  
Lived Body ◽  
Existential Feelings ◽  
Other Hand ◽  
Health And Illness ◽  
Chronic Anxiety ◽  
Phenomenological View ◽  
Life Projects

AbstractIn this paper I explore health and illness through the lens of enactivism, which is understood and developed as a bodily-based worldly-engaged phenomenology. Various health theories – biomedical, ability-based, biopsychosocial – are introduced and scrutinized from the point of view of enactivism and phenomenology. Health is ultimately argued to consist in a central world-disclosing aspect of what is called existential feelings, experienced by way of transparency and ease in carrying out important life projects. Health, in such a phenomenologically enacted understanding, is an important and in many cases necessary part of leading a good life. Illness, on the other hand, by such a phenomenological view, consist in finding oneself at mercy of unhomelike existential feelings, such as bodily pains, nausea, extreme unmotivated tiredness, depression, chronic anxiety and delusion, which make it harder and, in some cases, impossible to flourish. In illness suffering the lived body hurts, resists, or, in other ways, alienates the activities of the ill person.

Negation and Disjunction in Anatolian—and elsewhere

1975 ◽  
Vol 25 ◽  
pp. 157-168 ◽  
Author(s):  
Anna Morpurgo Davies
Keyword(s):  
Point Of View ◽  
The Other ◽  
Other Hand

1. In the article which precedes Mr. Hawkins has proposed the readings NEG2 and NEG3 for the signs of Hieroglyphic Luwian and has argued that these logograms had the phonetic values na and ni respectively. These readings are supported by internal evidence and do not require any further justification, but it is necessary to see how plausible their consequences are from the linguistic point of view.1.1. The discovery of two negative particles, a prohibitive ni and a factual na, is welcome. Hieroglyphic now joins Cun. Luwian (prohibitive nis, factual nawa), Lycian (prohibitive ni, nipe, factual ne, nepe) and Hittite (prohibitive lē, factual natta). It is not as yet absolutely certain that Palaic does not make any distinction between prohibitive and factual negatives: the particles ni and nit are relatively frequent, but it is not altogether clear whether they occur or not in prohibitions. On the other hand it is normally assumed that Lydian has generalized one negative (nid “not”, nik “and not”) for both types of sentence.

Les "Noms de Qualite", Syntaxe ou Semantique?

1988 ◽  
Vol 12 (1) ◽  
pp. 157-179
Author(s):  
Francis Gandon
Keyword(s):  
Point Of View ◽  
The Other ◽  
Other Hand ◽  
Main Statement ◽  
Quality Distinction ◽  
The Relationship

The first part of this paper presents the position of the discussion: must a node Quality be assumed to describe "non classifying" nouns? N. Ruwet objects to this theoretical attitude as developped by J.-C. Milner. First is considered the DISQUAL (qualitative dislocation) transformation as unable to describe all the positions of the Quality nouns: the extra-posed dislocation is often impossible and, according to the position within the sentence, the relationship between thema and rhema will be modified. The criterium of dependence between the Quality noun and the main statement is not strict, on the other hand. No definite boundary between syntax and semantics can be drawn within the field considered. Another point develops the "syntactic pun" (Milner). The Qualitative question is eventually referred to Opacity and replaced inside an enonciative frame as a particular kind of "shifting out." Though the Class/Quality distinction operates as continuous (Ruwet), it cannot be separated of a general paradigm elsewhere developped (psychoanalysis, ethnology, semantics, etc.). Though not entirely descriptively adequate Milner's point of view is justified.

La logique de la preuve dans la littérature bartoliste Quelques explications à partir de la Summa circa testes et examinationem eorum (Ms. Bruxelles, B.R., II 1442, fol. 101 ra – 103 rb)

2008 ◽  
Vol 76 (3-4) ◽  
pp. 249-271
Author(s):  
Yves Mausen
Keyword(s):  
Sensory Perception ◽  
Point Of View ◽  
The Other ◽  
Minor Premise ◽  
Other Hand ◽  
Logical Point ◽  
The One

Abstract The logic of evidence in Bartolistic literature, A reading of the Summa circa testes et examinationem eorum (Ms. Bruxelles, B.R., II 1442, fol.101 ra – 103 rb). – Bartolus teaches how to read testimonies from a logical point of view. On the one hand, the facts that the witness recounts constitute the minor premise of a syllogism, its conclusion being their legal characterization; therefore he is prohibited from pronouncing directly on any legal matter. On the other hand, given that the witness' knowledge of the facts has to stem from sensory perception, the information he provides has at least to constitute the minor premise of another syllogism, making for establishing the causa of his testimony.

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