Stefan Diener

Stefan Diener
Eawag: Das Wasserforschungs-Institut des ETH-Bereichs | Eawag · Department of Water and Sanitation in Developing Countries

PhD

About

21
Publications
171,490
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2,849
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Additional affiliations
January 2009 - December 2011
Eawag: Das Wasserforschungs-Institut des ETH-Bereichs

Publications

Publications (21)
Book
Full-text available
This book deals with urban organic municipal waste from households, commercial activities, and institutions. It describes the approach of biowaste conversion by insect larvae, using the example of the Black Soldier Fly (BSF), Hermetia illucens. This engineered biosystem consists of feeding segregated biowaste to BSF larvae, which are reared in a nu...
Article
Full-text available
A key challenge for black soldier fly larvae (BSFL) treatment is its variable reliability and efficiency when applied to different biowastes. Similar to other biowaste treatment technologies, co-conversion could compensate for variability in the composition of biowastes. Using detailed nutrient analyses, this study assessed whether mixing biowastes...
Article
Full-text available
Cities of low and middle-income countries face severe challenges in managing the increasing amount of waste produced, especially the organic fraction. Black Soldier Fly (BSF) biowaste treatment is an attractive treatment option as it offers a solution for waste management while also providing a protein source to help alleviate the rising global dem...
Article
Full-text available
Processing of biowaste with larvae of the black soldier fly, Hermetia illucens L. (Diptera: Stratiomyidae), is an emerging waste treatment technology. Larvae grown on biowaste can be a relevant raw material for animal feed production and can therefore provide revenues for financially viable waste management systems. In addition, when produced on bi...
Article
Full-text available
Global population growth has led to an urgent need for more efficient food production systems. Moreover, as income levels increase, dietary preferences are shifting to more animal-based products. However, current feed protein sources deplete wild fish populations and contribute to rainforest deforestation. Capturing the resources in organic waste c...
Book
Full-text available
Recycling organic waste material (biowaste) still remains fairly limited, especially in low- and middle-income settings, although this is by far the largest fraction of all generated municipal waste. This book deals with urban organic municipal waste from households, commercial activities, and institutions. It describes the approach of biowaste con...
Article
Full-text available
Treatment of biowaste, the predominant waste fraction in low- and middle-income settings, offers public health, environmental and economic benefits by converting waste into a hygienic product, diverting it from disposal sites, and providing a source of income. This article presents a comprehensive overview of 13 biowaste treatment technologies, gr...
Article
Full-text available
In developing countries, effective waste management strategies are constrained by high collection costs and lack of adequate treatment and disposal options. The organic fraction in particular, which accounts for more than 50% of the waste production, constitutes a great, yet mostly neglected, reuse potential. Concomitantly, the demand for alternati...
Article
Full-text available
The recycling of organic waste worldwide is not effective, which leads to water pollution and loss of potential crop fertilizers. Available resources have to be used more efficiently as the world population increases. An innovative solution is to use insects for the management of organic waste. Here, we used black soldier fly to convert organic was...
Article
Full-text available
There is currently a lack of access to affordable sanitation in urban areas of Sub-Saharan Africa. This study evaluated the potential for resource recovery from innovative faecal sludge treatment processes to generate a profit that could help sustain the sanitation service chain. A total of 242 interviews were conducted in Accra, Ghana; Dakar, Sene...
Book
Full-text available
Anaerobic digestion (AD) reduces the amount of waste and generates products of value, such as biogas and nutrient-rich digestate. Contrary to the wide dissemination of digesters in rural areas where animal manure is used as feedstock and despite its apparent potential, AD still plays a negligible role as a treatment option for organic kitchen and m...
Article
Full-text available
Inadequate and lacking sanitation and wastewater treatment systems can lead to the spreading of diarrhoeal diseases. One contributing factor in the lack of such treatment systems is the lack of economic incentives for stakeholders throughout the service chain. However, the organic fraction of the waste is high in valuable plant nutrients and could...
Article
Full-text available
Valorisation of municipal organic waste through larval feeding activity of the black soldier fly, Hermetia illucens, constitutes a potential benefit, especially for low and middle-income countries. Besides waste reduction and stabilisation, the product in form of the last larval stage, the so-called prepupae, offers a valuable additive in animal fe...
Conference Paper
Full-text available
Larvae of the black soldier fly, Hermetia illucens L. (Diptera: Stratiomyidae), may be used in low and middle-income countries to transform organic waste into valuable animal feedstuff: in the form of their last larval stage, the so-called prepupa. Revenues from sales of this potential animal feed can cover parts of the waste collection costs. Our...
Article
Full-text available
Larvae of the black soldier fly, Hermetia illucens (Diptera: Stratiomyidae), are voracious feeders of organic material and may thus be used in simple engineered systems to reduce organic waste in low- and middle-income countries. Controlled feeding experiments with standard fodder were conducted to assess the optimum amount of organic waste to be a...
Conference Paper
Full-text available
Current waste management in Costa Rica is by large dependant on the formal as well as the informal private sector. Rural communities are almost entirely devoid of any sort of regulated solid waste management system and in urban areas, inorganic waste recycling is practised mostly by the informal sector, mainly at neighbourhood level, where waste pi...
Article
Full-text available
Knowledge about the quantitative pollen requirements of solitary bees is crucial for the preservation of endangered bee species and the understanding of the evolution of bee–flower relationships. We estimate the number of flowers required to rear a single larva for 41 European bee species (i) by comparing the pollen content of brood cells with the...

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