Research


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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 : 2018-08-01 - 2019-04-30

Nanopesticides are primarily nanocarrier ‐ active ingredient complexes, whose behaviour is neither fully nano, nor solute alike. The effects that a nanoformulation has on the fate of an active ingredient may be multiple and depend on the product under consideration. In order to cover possible scenarios, organic nanoparticles, and nanopesticides in particular, can be conceptualised as a nanocarrier (NC), loaded with the active ingredient (AI) that is released from the NC over time. The fate of the free AI (i.e., after its release from the NC) should be well described by models based on the solute approach. The fate of the NC should resemble that of engineered nanoparticles that were extensively studied over the last decade. though the applicability of methods and concepts developed for hard nanoparticles should be verified and possibly adapted to soft organic nanoparticles.

Supervised Theses and Dissertations