Research


Latest SCI publications

Latest Projects

Research project (§ 26 & § 27)
Duration : 2018-04-01 - 2021-03-31

Biogenic waste waters contain significant amounts of nutrients. Their removal in waste water treatment plants is cost and energy intensive. The project “ReNOx 2.0” investigates the simultaneous recovery and industrial utilization of NH4+ & PO43-. Therefore, a zeolite-based process called ion-exchanger-loop-stripping (“ILS”) is used, which has been successfully tested for NH4 +-recovery from sludge liquor in municipal waste water treatment plants in the previous project “ReNOx”. In “ReNOx 2.0” this process is extended for simultaneous phosphate recovery and tested in further applications (digestate, manure, landfill leachate, industrial waste waters). The previous project revealed complex ion exchange interactions on zeolites, which require further modification of the zeolites and process enhancement to fulfill the requirements for novel applications and media. The aims of „ReNOx 2.0“ are 1) to extend the potential areas of application for the ILSprocess, 2) to increase the ammonium recovery by zeolite optimization, 3) to investigate the fixation and energy-saving recovery of phosphorous by using modified zeolite and 4) to achieve process intensification by simultaneous removal and selective recovery of NH4+ &PO43- in a single, optimized process (“ILSplus”). Modified zeolite will be prepared on a lab-scale in a first step according to a novel production process developed at the beginning of “ReNOx 2.0” and then used for simultaneous NH4+ &PO43--recovery (N&P-recovery) from real effluent samples. Afterwards, an existing pilot plant will be adapted for simultaneous N&P-recovery and tested in different operational environments. The industrial feasibility of the ILSplus-process will be evaluated by means of a detailed model of the whole process. The products of ILSplus will be tested for their applicability as N&P-fertilizer, DeNOx-agent or other potential applications. The impact on sectoral and national raw material cycles and its merit will be quantified. The international consortium of “ReNOx 2.0” includes research institutions, plant engineering companies, raw material suppliers and potential customers of ILSplus-plants and products and endeavours the whole process chain to conduct high-quality, interdisciplinary research. “ReNOx 2.0” will provide the basis for compact retrofitting unit-design to enable the economic recovery of excess amounts of NH4+ and PO4 3- from currently unused sources and contribute to the intelligent utilization of national resources especially for the critical raw material phosphorous.
Research project (§ 26 & § 27)
Duration : 2018-01-01 - 2019-12-31

In a circular economy where discarded materials are recycled in resource efficient manners, also a successful shift of textile waste recovery, from incineration to high quality recycled textile fibers is necessary. It has been identified that blends containing elastane (strong increase on the market, common in stretch jeans and leggings) and nylon are very problematic components in recycling processes. This is where we will pursue a novel biological-based enzyme engineering strategy in concert with thermo-mechanical processes towards selective separation of these blends. This approach will further be implemented in case studies on selected products of high importance for the industrial partners, and the process will be supported by sustainability and cost assessments to ensure the environmental and economical relevance of the recycling scheme. The ambition of the project is to accelerate the shift of the Swedish textile industry towards a circular economy.
Research project (§ 26 & § 27)
Duration : 2018-01-01 - 2020-12-31

The European Commission’s ambitious renewable energy goals, 20-20-20 objectives and Strategic Energy Technology Plan (SET Plan) request new technological and non-technological measures. Biogas is one of the promising energy sources that is not fully employed yet as a part of national gas and electric grids. BIOFEGG project will tackle this shortcoming by standardizing biogas quality. The project develops and pilots new control methods for anaerobic digestion process and a novel biogas cleaning and upgrading method for siloxanes and terpenes. The project also demonstrates a recently developed innovative real- time monitoring system for the biogas quality. The connectivity of biogas plants to gas grids, biomethane filling stations and future electric generation systems are studied in the project taking into account both technical issues and non-technical issues like regulations, environmental aspects and financial framework. The project is conducted by an international team consisting of four industrial partners and four research partners.

Supervised Theses and Dissertations