Two weeks ago, we have attended the Aquaculture Europe 2017 conference in Dubrovnik. I (Boris) presented our latest findings with respect to sludge mineralisation in aquaponic systems. It is a challenge to treat fish sludge within aquaponic systems to reduce the quantity of waste. Even more important is the objective to recover the valuable nutrients that are trapped in the sludge. Nutrient recovery by sludge mineralisation constitutes a great opportunity to complement the hydroponic nutrient solution in a sustainable manner. Read more
Aquaponics is a trending topic, but this finding on plant growth performance could be path-breaking for further aquaponics development. The Developonics team has published a new paper in the peer review journal Water (MDPI) with the title Lettuce (Lactuca sativa L. var. Sucrine) Growth Performance in Complemented Aquaponic Solution Outperforms Hydroponics. The results were beyond our imagination. Read more
Today, Simon has started a lettuce growth experiment together with Tycho Vermeulen in Bleiswijk, the Netherlands. We are going to assess to what degree micro organisms in RAS water have an impact on lettuce growth by adding it to a hydroponic solution. The control group is a standard hydroponic nutrient solution for lettuce. We expect this experiment to take 8 weeks, and publishing the results somewhen mid of next year. Cheers!
Yes – we are still alive, and no – we did not forget about posting on Developonics. We are currently just busy with publishing our research as well as already planing new aquaponics related projects. What else have we done? In March, Simon has been presenting the model on decoupled aquaponic systems that he developed at the COST Aquaponics Conference “Research Matters”. Unlike in one-loop recirculating aquaponics systems, decoupled two- or three-loop systems (i.e. comprising of a RAS & hydroponic system, or RAS, hydroponic, and remineralization system respectively) follow the principle of a one-way nutrient flow. This makes it possible to ensure optimal conditions for both fish and plants; i.e. the fish are held in optimal RAS conditions, and the hydroponic water can be supplemented with macro- and micronutrients to ensure an optimal nutrient solution. Read more
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. 🙂
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.