In my research I examined the potential of algae cultivation in close proximity to marine offshore fish cages, creating an integrated farm model, which produces animal and plant protein, using negligible quantities of freshwater resources.
The results proved Ulva algae to be suitable for use as a biofilter, which reduces the environmental negative impact of offshore fish cages by assimilating excess nutrients and nitrogenous compounds emitted from fish production. Cultivation of algae and fish in an integrated system may reduce inland beef, poultry, and vegetable agriculture, thus significantly reducing the use of fresh water, potentially saving hundreds trillions of liters of water annually.
The aim of the research is removal of metals from contaminated groundwater via chemical reaction between the aquifer rocks and oxalic acid injected in the water. The research consisted of laboratory experiments demonstrating that the concentration of lead, zinc, nickel, barium in the water could be decreased. Further experiments are needed to better understand the appropriate conditions for the success of the method for various metals, and for conditions prevailing in groundwater.
Monitoring genotoxic materials (which alter genes) in the environment is crucial for public health. The traditional methods to monitor these substances are expensive and complicated. This research project presents a novel and sensitive bio-reporter based on genetically engineered bacteria for monitoring genotoxic substances in wastewater.
The biosensor is composed of the umuD promotor (a part of the bacterial DNA correction system called SOS) which responds to DNA damage, coupled to a reporter gene that produces a measurable light signal.
This sensor was tested in the form of a chip (which can be conveniently applied in the field) while the bacteria were exposed to different concentrations of known genotoxic substances as well as to real wastewater samples. In both cases, the bacteria emitted a measurable signal which can be used for detection of genetoxics.
This study monitored genotoxic materials in the various stages of the wastewater treatment process. This was done using biosensors based on genetically modified E. coli bacteria. Our result showed that the treatment process did not cause a decrease in the genotoxicity level of the water.