Ranka Junge

Ranka Junge

Prof. Dr.
Zurich University Applied Sciences (external collaborator) Ranka Junge Ecotechnology Consulting

About

85
Publications
117,012
Reads
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1,922
Citations
Additional affiliations
January 1993 - April 1996
University of Basel
Position
  • PostDoc Position
April 1985 - September 1990
Universität Konstanz
Position
  • PhD Student
September 1979 - August 1981
National Institute of Chemistry
Position
  • Research Assistant

Publications

Publications (85)
Article
Full-text available
The aim of this study was to analyze current practices in commercial urban rooftop farming (URF). In recent years, URF has been experiencing increasing popularity. It is a practice that is well-suited to enhancing food security in cities and reducing the environmental impact that results from long transportation distances that are common in convent...
Article
Full-text available
Aquaponics (AP) is a food production system that combines hydroponic (HP) crop production with recirculating aquaculture. Different types of hydroponic systems have been used for growing crops in aquaponics. However, very few studies have compared their suitability and efficiency in an aquaponic context. The study presented here compares tomato yie...
Article
Full-text available
Aquaponics is a solution for sustainable production of fish and plants in a single semi-closed system, where nutrient-rich water from the aquaculture provides nutrients for plant growth. We examined the microbial communities within an experimental aquaponics system. Whereas the fish feces contained a separate community dominated by bacteria of the...
Article
Full-text available
One of the main challenges in aquaponics is disease control. One possible solution for this is biological control with organisms exerting inhibitory effects on fish and plant pathogens. The aim of this study was to examine the potential of isolating microorganisms that exert an inhibitory effect on both plant and fish pathogens from an established...
Chapter
Aquaponics is an innovative and sustainable food production technology which has the potential to make a significant contribution to twenty-first century food systems, especially if there is an adequately trained workforce. In this chapter we review the efforts of an international consortium to develop a curriculum for teaching the basics of aquapo...
Article
Full-text available
In the scope of this study, a pilot facility for the recycling of laundry effluent was developed and tested. With the aim to enable nearly complete energy and water self-sufficiency, the system is powered by a photovoltaic plant with second-life batteries, treats the wastewater within the unit and constantly reuses the treated wastewater for washin...
Article
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Urban agriculture (UA) plays a key role in the circular metabolism of cities, as it can use water resources, nutrients, and other materials recovered from streams that currently leave the city as solid waste or as wastewater to produce new food and biomass. The ecosystem services of urban green spaces and infrastructures and the productivity of spe...
Article
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A framework developed by the COST Action Circular City (an EU-funded network of 500+ scientists from 40+ countries; COST = Cooperation in Science and Technology) for addressing Urban Circularity Challenges (UCCs) with nature-based solutions (NBSs) was analyzed by various urban sectors which refer to different fields of activities for circular manag...
Article
Full-text available
The aquaponic principle is the coupling of animal aquaculture (e.g. fish) with plant production (e.g. vegetables) for saving resources. At present, various definitions of aquaponics exist, some bearing the risk of misinterpretation by dismissing the original meaning or being contradictory. In addition, there is no standard terminology for the aspec...
Article
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In the past decades, the search for a more sustainable way of global development has increased in importance in international politics and economy. A driving force is the continuing degradation of the environment in many areas of the world, often caused or accelerated by population growth and climate change. Sustainable development is seen as key a...
Article
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Overcoming Limitations of Ecology and Engineering in Addressing Society’s Challenges By providing an integrated, systems-approach to problem-solving that incorporates ecological principles in engineering design, ecological engineering addresses, many of the limitations of Ecology and Engineering needed to work out how people and nature can benefici...
Article
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Aquaponic food production requires a broad spectrum of knowledge in order to understand and manage the processes involved, and for commercial aquaponics to develop its full potential, it will require an appropriately trained workforce. Devised in collaboration as an Erasmus+ Strategic Partnership for Higher Education, Aqu@teach covers the basics of...
Article
Full-text available
The presence and transformations of nitrogen (N) in the environment depend on a variety of environmental factors but are also strongly influenced by anthropogenic activities such as modern agriculture. Understanding N transformations within the context of agricultural systems is crucial for efficient use thereof. The aim of this study was to invest...
Article
Full-text available
Background An aquaponic system couples cultivation of plants and fish in the same aqueous medium. The system consists of interconnected compartments for fish rearing and plant production, as well as for water filtration, with all compartments hosting diverse microbial communities, which interact within the system. Due to the design, function and op...
Book
AQU@TEACH is a unique multidisciplinary curriculum for Higher Education. The 15 module Aquaponics Curriculum and the supplementary Entrepreneurial Skills module can be taught either using blended learning or as an instructor-led, cohort-based e-learning course. The Aquaponics Curriculum is intended for tertiary level teachers who want to introduc...
Book
The Entrepreneurial Skills for Aquaponics textbook accompanies the Aqu@teach supplementary module which introduces the main processes involved in developing a business idea into a start-up company – business models, customer segmentation, value proposition, marketing and pricing, and financing.
Article
Full-text available
In recent years, aquaponics has been receiving increased interest globally as a commercial food production technology and aquaponics start-up companies have been formed in most European countries. Between 2014 and 2018, the European-funded COST Action FA1305 "The EU Aquaponics Hub-Realising Sustainable Integrated Fish and Vegetable Production for t...
Article
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Research and practice during the last 20 years has shown that urban agriculture can contribute to minimising the effects of climate change by, at the same time, improving the life quality in urban areas. In order to do so most effectively, land use and spatial planning are crucial so as to obtain and maintain a supportive green infrastructure and t...
Chapter
Full-text available
This chapter provides an overview of possible strategies for implementing aquaponics in curricula at different levels of education, illustrated by case studies from different countries. Aquaponics can promote scientific literacy and provide a useful tool for teaching the natural sciences at all levels, from primary through to tertiary education. An...
Chapter
Full-text available
Hydroponics is a method to grow crops without soil, and as such, these systems are added to aquaculture components to create aquaponics systems. Thus, together with the recirculating aquaculture system (RAS), hydroponic production forms a key part of the aqua-agricultural system of aquaponics. Many different existing hydroponic technologies can be...
Article
Full-text available
Aquaponics is a production system based on the dynamic equilibrium between fish, plants, and microorganisms. In order to better understand the role of microorganisms in this tripartite relationship, we studied the bacterial communities hosted in eight aquaponic and aquaculture systems. The bacterial communities were analyzed by 16S rRNA gene deep s...
Article
Full-text available
This paper calls the attention to the important role the microelement nickel plays is the decomposition of urea (excreted by the fish as waste), and thus to its potential role in aquaponic systems. Since nickel is not included in the list of micronutrients essential to fish growth and development, fish feeds probably do not contain sufficient amoun...
Article
Full-text available
Aquaponics is a recirculating technology that combines aquaculture with hydroponics. It allows nutrients from fish waste to feed plants and thus saves water and nutrients. However, there is a mismatch between the nutrients provided by the fish waste and plant needs. Because of this, some nutrients, notably N, tend to accumulate in the aquaponic wat...
Article
Aquaponics is an approach of coupling two technologies: recirculation aquaculture (fish-farms) and hydroponics (soil-less cultivation of crops). While it is perceived as a way to contribute to more sustainable food systems, the technology is still in its infancy, with several challenges. This paper describes current conditions of development and id...
Article
Full-text available
Aquaponics (AP), the integrated multi-trophic fish and plants production in quasi-closed recirculating system, is one of the newest sustainable food production systems. The hydroponic component of the AP directly influences water quality (in turn influencing fish growth and health), and water consumption (through evapotranspiration) of the entire s...
Article
Full-text available
Nutrients that are contained in aquaculture effluent may not supply sufficient levels of nutrients for proper plant development and growth in hydroponics; therefore, they need to be supplemented. To determine the required level of supplementation, three identical aquaponic systems (A, B, and C) and one hydroponic system (D) were stocked with lettuc...
Article
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This paper discusses the framework for the development of an Energy Toolbox (ETB). The aim of the ETB is to support the design of domestic Zero Emission Buildings (ZEBs), according to the concept of net zero-energy buildings during the early architectural design and planning phases. The ETB concept is based on the calculation of the energy demand f...
Article
Aquaponics is not only a forward-looking technology but it has also been proposed as a tool for teaching natural sciences at all school levels, from primary school to university. Life cycle assessment (LCA) has become a widely accepted method of evaluating the environmental impact of products and services. In this context, the aims of this paper we...
Article
Full-text available
This paper reports the results of the first study of an aquaponic system for Pangasianodon hypophthalmus production that uses Lactuca sativa L. (lettuce) and Cichorium intybus L. rubifolium group (red chicory) intercropping in the hydroponic section. The experiment was conducted in a greenhouse at the Zurich University of Applied Sciences, Wädenswi...
Article
Full-text available
Global environmental, social and economic challenges drive the need for new and improved solutions for food production and consumption. Food production within a sustainability corridor requires innovations exceeding traditional paradigms, acknowledging the complexity arising from sustainability. However, there is a lack of knowledge about how to di...
Article
Full-text available
The paper gives an overview on the progress of the construction of a database of the pesticides that pose minimum risk when applied in an aquaponic system. Aquaponics is a developing food production system that integrates recirculating aquaculture (raising fish and other aquatic animals in closed systems) and hydroponics (plant production in water...
Chapter
Full-text available
This paper gives an overview on aquaponics-a new, emerging food production technology. We point out to the social, economic, and environmental advantages of aquaponic systems, as well as to their complexity, in relation to plant nutrition and fish and plant health, and pest control. Furthermore, environmental aspects and connections to circular eco...
Article
Full-text available
International aquaponic production has increased over the past decade, but less is known about research activities and production facilities operating in Europe. We conducted an online survey to get a better idea about research and production in Europe, focusing on five areas of aquaponics (i.e., demographics, facilities used, fish and crops produc...
Article
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In this preliminary article we present data on plant nutrient concentrations in aquaponic systems, and compare them to nutrient concentrations in " standard " hydroponic solutions. Our data shows that the nutrient concentrations supplied by the fish in aquaponic system are significantly lower for most nutrients, compared to hydroponic systems. Neve...
Article
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The mobilization of nutrients from fish sludge (i.e., feces and uneaten feed) plays a key role in optimizing the resource utilization and thus in improving the sustainability of aquaponic systems. While several studies have documented the aerobic and anaerobic digestion performance of aquaculture sludge, the impact of the digestate on plant growth...
Article
Zearalenone (ZEN) is a frequent contaminant of animal feeds, but systemic effects on fish and possible metabolic costs have not yet been investigated. In order to fill this gap a feeding trial with juvenile carp was conducted. The fish were fed ZEN-contaminated diets at three concentrations (low: 332 μg kg− 1, medium: 621 μg kg− 1, and high: 797 μg...
Article
Full-text available
Aquaponics is an evolving closed-system food production technology that integrates recirculating aquaculture with hydroponics. In this paper we give a brief literature overview of the sustainability aspects of aquaponics by discussing its social, environmental, and economic impacts in different potential settings. The technology might be applied to...
Article
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The authors gathered information on perceived impact of current legislation on entrepreneurial possibilities in developing commercial aquaponics in Europe. The paper highlights the detected obstacles, and the solutions developed to address the legislative issues. Three main issues outlined are: administration, environment, and safety.
Article
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Some readers of Ecocycles may find surprising that the journal opened a section called Aquaponic Corner. Here we explain why we felt necessary to cover this specific area. World problems related to food and water deserve particular attention. Malthus, more than two centuries ago, wrote that food shortages will lead to famine, wars, and mass migrati...
Article
Full-text available
The mycotoxin zearalenone (ZEN) is a frequent contaminant of animal feeds, but its effects on fish have not yet been investigated extensively. In order to fill this gap a feeding trial with juvenile carp was conducted. Three groups of fish were fed feeds contaminated with ZEN at three concentrations (low: 332 μg kg-1, medium: 621 μg kg-1, and high:...
Article
Full-text available
The mycotoxin zearalenone (ZEN) is frequently contaminating animal feeds including feed used in aquaculture. In the present study, the effects of dietary exposure to ZEN on carp (Cyprinus carpio L.) were investigated. ZEN at three different concentrations (low dose: 332 µg kg(-1), medium dose: 621 µg kg(-1) and high dose: 797 µg kg(-1) final feed,...
Poster
Full-text available
Aquaponics integrates recirculating aquaculture with hydroponics to produce fish and plants in a cyclic system. This paper calls the attention to a particularly important issue in aquaponics often neglected until it is too late: the management of plant pests and diseases. We conclude that aquaponic systems cannot be efficiently operated without the...
Research
Oral presentation. 2014 International Conference on Vertical Farming and Urban Agriculture (VFUA 2014). 9th-10th September 2014. Nottingham: UK. Available online: http://vfua.org/wp-content/uploads/2014/12/Ranka-Junge.pdf.
Article
Full-text available
The operation of so-called Zero Emission Buildings (ZEB) does not result in harmful emissions to water, soil and air. In contrast, ZEBs produce energy, water and resources. Therefore, the definition of ZEBs in this paper goes well beyond the definition of (Net) Zero Energy Buildings, which focuses primarily on greenhouse gas emissions resulting fro...
Conference Paper
Full-text available
Aquaponics plays a part in promoting sustainable development on different levels in society, and its use is becoming ever more widespread. However, there are not enough trained specialists yet to build and operate such systems. The aim of this paper is to highlight the role of institutions of higher education – like ZHAW – can play to mitigate this...
Conference Paper
Full-text available
System thinking with Aquaponic " is an educational concept that aims to train students in system thinking by using a connected fish and plant culture system. System thinking is seen as a central skill in education for sustainability. Between October 2007 and January 2008, a teaching sequence took place with three classes of 7th grade students in th...
Conference Paper
Full-text available
Oral presentation. 2014 International Conference on Vertical Farming and Urban Agriculture (VFUA 2014). 9th-10th September 2014. Nottingham: UK. Available online: http://vfua.org/wp-content/uploads/2014/12/Ranka-Junge.pdf
Article
Full-text available
Aquaponic is a recirculating food production system where fish and plants are cultivated utilizing natural bacterial cycles which convert fish waste to plant nutrients. This system is environmentally friendly considering the food is produced with low water consumption and without any chemical fertilizers or pesticides. A pilot aquaponic system has...
Article
Full-text available
Hydrothermal carbonization at 205C was evaluated to process waste whey containing 5.9% of dry matter to a coal-like material and process water. Carbonization increased dramatically the heating value, with 15 MJ/kh for whey and 25.2 MJ/kg for coal, alongside the carbon fraction, from 38.0% (whey) to 60.4 % (coal). Carbonization brought C/H and C/O m...
Chapter
Full-text available
Algal Turf Scrubbers (ATS) are water treatment devices that use light and nutrients in the (waste)water to grow periphyton community; undesirable chemicals are removed by physical, chemical and biological processes. So far, most ATS systems were operated in water bodies with relatively high nutrient concentrations. Little is known about the perform...