Abstract:

To help the healthy development of Liuzhou snail rice noodle in Guangxi, the shell quality and carbon sequestration effect and benefit of artificially bred snail were studied based on geochemical theory and technology. Using snail and field snail from Liuzhou snail breeding base as test materials, Ca²⁺, Mg²⁺, HCO₃^- and other data were tested to analyze the coupling relationship between shell quality and carbon sink and geological background. The values of Ca²⁺, Mg²⁺, HCO₃^-, pH and fCO₂ in water can affect the construction and corrosion of calcite crystals in the shell of snails, making the shell mechanical strength different or eroded. The shell quality of artificially bred snails can be improved by adjusting the contents of Ca²⁺, Mg²⁺ and HCO₃^- in water, with the average content of CaCO₃ and CO₂ of 92.76% and 40.81% respectively, according to the estimation of 26000 t/a of artificially cultured snails, 3700 t of carbon can be fixed and the carbon sink transaction volume can reach 266800 yuan. The values of Ca²⁺, pH and fCO₂ in water body are directly related to the quality of snails. The carbon sink of cultured snails belongs to the carbon removal technology category of biomass energy carbon capture and storage, and can apply for carbon trading.

Key words: snail and field snail, cultured snail, shell carbon fixation, geochemical composition, shell quality, carbon trading, snail rice noodle industry, Liuzhou of Guangxi