Climate change poses a severe threat to food production, making it imperative to find sustainable methods. One such method is aquaponics, which grows fish and vegetables together. Now, Ben-Gurion University of the Negev water researchers have offered a proof of concept for a new closed loop system that produced more fish and vegetables while using less energy than conventional systems.
I find the solution to solid accumulation proposed here a bit overkill. Running a biogas plant is no easy task, and unless you can directly use the gas for heating the facility it is also not a good value proposition.
Usually solids accumulate because of over-feeding the fish with feed pellets. The excrement of the fish themselves is not very solid. And the solids are AFAIK mainly a problem for clogging the biological filter, which in a well balanced aquaponics system isn’t even needed.