Håkan Asp
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View article: Nutrient utilization and growth of tomato crops fertilized with solid anaerobic digestate
Nutrient utilization and growth of tomato crops fertilized with solid anaerobic digestate Open
Anaerobic digestate is a valuable resource for horticultural production, as it contains nutrients and fibers that can be used in plant growing medium. However, compared with hydroponic production based on mineral fertilizers, obtaining acc…
View article: Nutrient challenges with solid-phase anaerobic digestate as a peat substitute – Storage decreased ammonium toxicity but increased phosphorus availability
Nutrient challenges with solid-phase anaerobic digestate as a peat substitute – Storage decreased ammonium toxicity but increased phosphorus availability Open
The solid fraction (SD) obtained after liquid - solid separation of anaerobic digestate is interesting as a potential fertilizer as well as a peat substitute in horticultural growing substrates. We investigated the effect of incubation of …
View article: Production of oyster mushroom (Pleurotus ostreatus) on sawdust supplemented with anaerobic digestate
Production of oyster mushroom (Pleurotus ostreatus) on sawdust supplemented with anaerobic digestate Open
Anaerobic digestion of organic waste results in production of biogas and a nutrient-rich digestate that has an established use as fertilizer in plant production. This study evaluated use of anaerobic digestate based on a high concentration…
View article: Benefits and drawbacks of combined plant and mushroom production in substrate based on biogas digestate and peat
Benefits and drawbacks of combined plant and mushroom production in substrate based on biogas digestate and peat Open
Production of plants and mushrooms in substrate based partly on anaerobic digestate from biogas production (30%) and peat (70%) was studied in experiments performed using oyster mushroom (Pleurotus ostreatus) and basil (Ocimum basilicum). …
View article: Anaerobic digestate as peat substitute and fertiliser in pot production of basil
Anaerobic digestate as peat substitute and fertiliser in pot production of basil Open
The common use of peat as a growing medium for plant production is questioned due to the negative effects on the environment and climate. Therefore, it is of great importance to find substitutes for peat with similar positive properties th…
View article: Organic micropollutants, heavy metals and pathogens in anaerobic digestate based on food waste
Organic micropollutants, heavy metals and pathogens in anaerobic digestate based on food waste Open
Anaerobic digestate based on food waste is increasingly used as fertilizer in food production. This study examined the characteristics of anaerobic digestate based on food waste from three biogas plants in Sweden. The characterization incl…
View article: Liquid Anaerobic Digestate as Sole Nutrient Source in Soilless Horticulture—Or Spiked With Mineral Nutrients for Improved Plant Growth
Liquid Anaerobic Digestate as Sole Nutrient Source in Soilless Horticulture—Or Spiked With Mineral Nutrients for Improved Plant Growth Open
Digestate from biogas production high in plant-available macro- and micro-nutrients could replace mineral fertilizer in protected (soilless) horticulture. Previous uses of digestate have shown that low concentrations of plant-available pho…
View article: Food waste to new food: Risk assessment and microbial community analysis of anaerobic digestate as a nutrient source in hydroponic production of vegetables
Food waste to new food: Risk assessment and microbial community analysis of anaerobic digestate as a nutrient source in hydroponic production of vegetables Open
In this study, the microbiological food safety of using anaerobic digestate as a fertilizer in hydroponic production of vegetables was evaluated. The used anaerobic digestate was a liquid residue obtained from the digestion of food waste i…
View article: Uptake of perfluoroalkyl substances, pharmaceuticals, and parabens by oyster mushrooms (Pleurotus ostreatus) and exposure risk in human consumption
Uptake of perfluoroalkyl substances, pharmaceuticals, and parabens by oyster mushrooms (Pleurotus ostreatus) and exposure risk in human consumption Open
Organic micropollutants (MPs) pose potential threats to environmental ecosystems and human health. This study investigated uptake of perfluoroalkyl substances (PFASs), pharmaceuticals, and paraben by edible oyster mushrooms (Pleurotus ostr…
View article: Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems
Utilizing Anaerobic Digestates as Nutrient Solutions in Hydroponic Production Systems Open
Moving food production into the urban and peri-urban areas is one way of facilitating a closed-loop approach, integrating waste handling with food production in order to recirculate nutrients and at the same time reduce the use of mined an…
View article: Dynamics of nutrient availability in tomato production with organic fertilisers
Dynamics of nutrient availability in tomato production with organic fertilisers Open
In greenhouse organic horticulture there is a great challenge in supplying the crop with adequate amounts of nutrients at the right stage of crop development. This has been identified as one of the main factors compromising yields in organ…
View article: Biogas Digestate in Vegetable Hydroponic Production: pH Dynamics and pH Management by Controlled Nitrification
Biogas Digestate in Vegetable Hydroponic Production: pH Dynamics and pH Management by Controlled Nitrification Open
Soilless cultivation of vegetables with digestate fertilizer from biogas production as a nutrient source is a promising method for integrating food production and organic waste management. In this study, bok choy ( Brassica rapa var. chine…
View article: Differences in Al sensitivity affect establishment of Populus genotypes on acidic forest land
Differences in Al sensitivity affect establishment of Populus genotypes on acidic forest land Open
Forest lands hold great potential for Populus plantations, but in native boreal forests, soils normally have low pH and thus higher levels of aluminum ions (Al3+ and hydroxides). Aluminum (Al) is one of the major factors limiting plant gro…
View article: Dynamics of nitrogen availability in pot grown crops with organic fertilization
Dynamics of nitrogen availability in pot grown crops with organic fertilization Open
Pot grown herbs are often cultivated as certified organic products, and there is an increasing demand for organically certified ornamental plants. Supplying the required nutrients using organic fertilizers is a challenge with respect to ma…
View article: Use of the effluent from biogas production for cultivation of Spirulina
Use of the effluent from biogas production for cultivation of Spirulina Open
The effluent from the biogas process was tested as a nutrient source during cultivation of the protein-rich and edible microalgae Spirulina (Arthrospira platensis) and compared with conventional Spirulina medium. Equal biomass production w…
View article: Plant developmental consequences of lighting from above or below in the production of Poinsettia
Plant developmental consequences of lighting from above or below in the production of Poinsettia Open
Artificial light is used for many horticultural crops produced in greenhouses, not least ornamental pot plants.New technologies such as LEDs will possibly replace high intensity discharge lamps as the main technology for lighting in hortic…
View article: Utnyttja belysningen effektivt
Utnyttja belysningen effektivt Open
The Prevotella genus is a normal constituent of the oral microbiota, and is commonly isolated from mechanically treated polymicrobial infections. However, antibiotic treatment is necessary for some patients. This study compared the antibio…