Ketil Stoknes

Ketil Stoknes
Lindum (Publically owned recycling company) · R&D

Doctor of Philosophy

About

18
Publications
7,955
Reads
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240
Citations
Citations since 2017
11 Research Items
222 Citations
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Introduction
Ketil Stoknes currently works as a project leader and researcher at Lindum AS, which is a waste treatment company (owned by the municipality of Drammen) conducting research within circular solutions for sustainable conversion of organic waste into energy and new crops. Ketil is focused on integrating anaerobic digestion and composting with closed environments for earthworms, mushrooms and plants. He is also currently working together with Agnieszka Jasinska in the project 'VegWaMus CirCrop.'

Publications

Publications (18)
Article
Full-text available
The present investigation aimed to study the utilisation of combined dairy manure-food waste digestate as a substrate (experimental mushroom substrate—EMS) for Pleurotus djamor (strain 2708, Mycelia) cultivation. Considering the lack of scientific information about the influence of elements concentration in growing substrates on the bioaccumulation...
Article
Full-text available
Commercial mushroom production is based on composted locally available agro-industrial wastes rich in carbon and nitrogen such as wheat straw supplemented with chicken manure. Either component can be replaced by other kinds of grain straw: barley, oat, or a mixture of different straw types and combined with diary manure—food waste digestate after a...
Chapter
This chapter is a summary of a series of studies with the objective of developing and demonstrating a commercially viable circular model of food and energy production, based on current methods but with modified technology. The functional principle was to a degree inspired by closed-loop ecosystems for life support in space, yet modified to terrestr...
Presentation
Here (on the Youtube video https://youtu.be/2vFjT2ymPrY) I explain and demonstrate how a circular, sustainable food loop can be created where food waste is converted to new food at The Magic Factory (Den Magiske Fabrikken) outside Tønsberg, Norway. The food we eat can have a huge environmental impact. It is farmed and transported using fossil resou...
Thesis
The food we eat can have a huge environmental impact. It is farmed and transported using fossil resources, while nutrients are lost and much of the product is wasted on its way to our plates. One way to meet this challenge is to combine biowaste treatment with food cultivation in closed-loop ecosystems. This has been on the agenda of NASA for decad...
Article
Full-text available
Almoust half of the world’s population is at risk for inadequate zinc (Zn) intake, a strategic trace element that is necessary for a healthy immune system. A lack of zinc can make a person more susceptible to disease and illness. There is a need of defining additional sources of zinc in diet. Cadmium (Cd), however, and its toxicity in food chain re...
Article
Full-text available
When using food and green waste composts as peat-free plant growing media, there is a challenge that nutrient immobilisation and high pH and salts content limit plant growth. The present study explored the use of spent mushroom compost (SMC) of Agaricus subrufescens in a sustainable plant growing system where only vermicompost from digested food wa...
Article
The growth in urban population requires solutions that improve the quality of life, especially by proper waste management, reduction of air pollution and CO2 emissions, and prevention of food waste. One of the key initiatives introduced and supported by the EU is circular economy. The main principle is 'to close the loop' by greater re-use and recy...
Article
Experiments on growing lettuce and head cabbage plants using potting media containing varying proportions of peat were conducted. The objective was to evaluate the potential of vermicompost (VC) produced from food waste digestate and green waste compost (GWC), as a substitute for peat. The first experiment compared peat reduced potting media to com...
Article
Full-text available
Abstract Cultivation of mushrooms is an important biotechnological process which converts a wide range of agro-industrial residues into mushroom growing substrates and produces healthy food. Conventional cultivation of Agaricus spp. is performed in composted straw, with chicken manure as the main source of nitrogen triggering the composting process...
Article
At urban locations certain challenges are concentrated: organic waste production, the need for waste treatment, energy demand, food demand, the need for circular economy and limited area for food production. Based on these factors the project presented here developed a novel technological approach for processing organic waste into new food. In this...
Conference Paper
Processing of clean organic wastes into new food can be performed in one system-production of biogas and greenhouse production of vegetables and mushrooms. In this system, organic waste is converted into biogas and digester residue is converted into substrate for vegetable and mushroom crops, and liquid fertilizer for fertigation. Biogas production...
Conference Paper
Full-text available
Processing of clean organic wastes into new food can be performed in one system-production of biogas and greenhouse production of vegetables and mushrooms. In this system, organic waste is converted into biogas and digester residue is converted into substrate for vegetable and mushroom crops, and liquid fertilizer for fertigation. Biogas production...
Article
Background: Source-separated food waste is increasingly being treated by means of hygienisation followed by anaerobic digestion. The fibrous digester residue (digestate) is a potential mushroom substrate, while heat from the biogas can provide steam for the cultivation process. Using bag experiments the present study explored digestate as a full s...
Conference Paper
Full-text available
Municipal-source separated food waste (MSSFW) is an increasingly abundant, nutritionally rich and complex product low in toxic constituents. Thus, it could be fed to heterotrophic organisms such as pigs or mushrooms. While representing a hygiene problem as feed, composting can help overcome the problem. This combination of community service and cro...

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Projects

Projects (2)
Project
The project objective is on closing loop between biogas production based on food wastes and reuse of output after anaerobic digestion aiming to develop commercial mushroom and vegetable production in an integrated food to waste to food biosystem. Mushroom and plant crop cultivation is usually performed through energy- and resourceintensive process, which generate wastes and the high CO2 footprint. Main emphasis has been on plant crops, but integrated mushroom cultivation has been found to be highly interesting from both Circular approach in which organic wastes are utilized for both energy (renewable biogas) and crop production in a closed system.This is the circular and future way of food Production.