Methods and systems for large scale carbon dioxide utilization from Lake Kivu via a CO2 industrial utilization hub integrated with electric power production and optional cryo-energy storage

A method for obtaining and utilizing carbon dioxide gas from a body of water containing dissolved carbon dioxide gas and methane gas, said method comprising the steps of:

• (a) extracting water from at least one extraction depth of the body of water to obtain extracted water;
• (b) degassing the extracted water in a first stage of degassing at a first depth so as to provide degassed water and extracted gases comprising carbon dioxide gas and methane gas in at least one flow;
• (c) conveying the degassed water upward to a second stage of degassing at a second depth higher than the first depth wherein an additional amount of carbon dioxide gas is extracted from the degassed water such that the degassed water has a carbon dioxide concentration that is not more than half of an initial concentration of carbon dioxide in the extracted water;
• (d) feeding to a utilization hub the carbon dioxide gas from step (c), wherein the utilization hub is configured to collect the carbon dioxide gas for storage, distribution, processing and/or utilization;
• and
• (e) utilizing the carbon dioxide collected by the utilization hub to perform at least one process selected from the group consisting of fertilizing growth of plants, fertilizing a biozone of Lake Kivu, lowering a pH of water returned into Lake Kivu, adjusting a pH of water exiting from a vacuum degassing system, adjusting a pH of water fed to an algal growth sector, cultivating algae, supplying a cryogenic energy storage reservoir, heating or cooling a supercritical CO2 power cycle heat engine power generator, delivering pressurized carbon dioxide by pipeline, delivering pressurized carbon dioxide by tanks including by pressurized tank trucks, producing dry ice, storing, producing and distributing refrigerated liquefied and/or solidified carbon dioxide, producing a magnesium-based cement or concrete, producing urea, producing formic acid, producing oxalic acid, producing acetic acid, producing a solvent, producing carbon monoxide, producing a pyrethrum pesticide, producing an asphyxiant, producing a food packaging gas, pasteurizing milk, beer or an agricultural juice, processing an agricultural, food, forest, textile, waste or biofuel product, cleaning a textile, treating leather, extracting geothermal energy, producing a fuel, producing a syngas, producing a chemical via a formate and/or by an oxalic acid platform, producing a chemical by gas fermentation based on a microbial Wood Ljundahl pathway, producing a chemical by a synthetic pathway including carbon dioxide as a reactant, producing a plastic including carbon dioxide as an ingredient, producing carbonic acid, producing a carbonated and/or CO2 pressurized beverage, producing sodium bicarbonate, producing a fracking fluid, producing silicic acid, producing microsilica, producing iron, producing nickel, processing an ore to produce a plant and/or aquatic fertilizer, processing an ore by solution extraction of one or more metals using supercritical carbon dioxide optionally injected into an ore zone, producing an elemental carbon product, producing oxygen gas, and injecting carbon dioxide via drillholes into subterranean strata for geostorage.