Experimental Study on Coastal Sediment Reinforcement by Induced Carbonate Precipitation by Different Enzyme Sources

Coastal erosion is increasing worldwide due to the frequency of extreme natural phenomena and excessive human exploitation. In this study, a small model experiment was conducted investigate solidification effects three enzyme sources—soybean urease, freshwater Bacillus pasteurella, seawater domesticated pasteurella—on coastal sediments their impacts in environment. The solidifying effect different sources determined by measuring mechanical properties corrosion resistance cured specimen model. influence solidified environment obtained changes pH value, calcium ion concentration, ammonia nitrogen content seawater. results show that have certain strengthening on sediments. can be enhanced amount solution or level effectively resist simulated flow erosion. Comparing reinforcement sources, it seen. It observed pasteurella acclimated had better than fresh water, water soybean urease. measurement tests, using led decrease acidification dissolved generated carbonate, increased concentration ions seawater, produced as byproduct that, compared with other two source solutions, seawater-domesticated adapt high-salt microbial metabolism not inhibited, urea decomposition ability improved, carbonate production higher, which improve engineering characteristics play positive role protection development.