Simon, Boris, and Zala are currently preparing some aquaponics experiments at ZHAW in Wädenswil (Switzerland). Two of them comprise sludge digestion for nutrient and water recycling. We hope to see the performance of both digster types on the nutrient dynamics on the system. The results will be published in a open access peer-review journal. Below some pictures of motivated young scientists. 🙂
Today, Zala and Simon have visited Urban Farmers in Basel. While cooking fresh tilapia and tomatoes from the aquaponics system, ideas have been exchanged with Andreas Graber and Ranka Junge.
In chemical engineering, processes are procedures encompassing mechanical, chemical, physical, electrical and biological steps to create a product from one or more substances. Decades of research and development have led to detailed knowledge of processes that shape our world today: from sawing off a piece of metal, to creating carbon nanotubes, everything that is industrially produced today comes from sets of very specific and controlled steps (i.e. process control (PC)).
Aquaponics -being an emerging field that deals with live organisms that can often be poorly understood-, can benefit from systematic engineering approaches found in process and chemical engineering disciplines. These approaches generally entitle breaking out a large process (a full aquaponic system in this case) into smaller sub-processes that can be studied both in isolation and in interaction with others. Read more
We are currently running an experiment on specific nutrient uptake of lettuce grown in hydroponic, and both one and two loop aquaponic nutrient solutions. To guarantee that all relevant data is available after the experiment, proper data logging is an often underestimated factor. The excel logging file can be used and adapted by everyone for personal usage. You can find the aquaponics logbook in our new section “Tools”. The tool can log pH, light, air temperature, air humidity, water temperature, volume, EC, N-NO3, N-NO2, TAN, P-PO4, K, S-SO4, Ca, Mg, Cl, Fe, Mn, Cu, Zn, B, Mo and converts ppm (mg/L) to mmol/L automatically. It also allows you to log how much acid/bicarbonates you added to your system for pH adjustment purposes.
Simon Goddek‘s and Boris Delaide‘s publication in the peer review journal ‘Sustainability’ summarizes the challenges of “aquaponics”, that is combining fish production (aquaculture) and out-of-ground crop production (hydroponics), in particular nutrient recycling advantages and knowledge gaps concerning nutrient forms and flows. Hydroponic systems allow precision controlled dosage of both water and nutrients (macronutrients, in particular N, P and K, and micronutrients) to crops, as a function of their growth and needs. This is more difficult in aquaponics, where the nutrient supply is a function of the fish production. Nutrients and micro-nutrients therefore should be monitored and supplemented where necessary for plant needs. Read more
All four Developonics members attended the Aquaponic Hub‘s 3rd Management Committee meeting in Gran Canaria that was held from 22nd to 24th of April 2015. The meeting can be considered very productive; especially as several agreements have been made to press ahead with respect to jointly publishing papers in the field of aquaponics. All of us are currently involved in preparing at least one manuscript on European basis. We are looking forward to sharing the results on this site.