Black Memories Left in Exxon Bay: A Turning Point in Environmental Restoration Challenged by Microorganisms (1989)

Black Memories Left in Exxon Bay: A Turning Point in Environmental Restoration Challenged by Microorganisms (1989)
In March 1989, the Exxon Valdez ran aground in Prince William Sound, Alaska, spilling over 40,000 kiloliters of crude oil. The accident caused tremendous damage to the ecosystem and local communities, and it became clear that conventional high-pressure hot water cleaning alone would not remove the oil that had penetrated deep into the sandy beaches. Attention was then focused on bioremediation, which utilizes the work of indigenous microorganisms that feed on the oil and multiply. It was found that the decomposition rate could be increased several times faster than in nature by supplying nutrients such as nitrogen and phosphorus, and nutrient capsules and spraying of the treatment solution were actually introduced at the accident site. As a result, oil degradation accelerated three to five times, and multiple studies confirmed the effect, shocking environmental engineers around the world.
The accident symbolized a turning point in the philosophy of working with nature's cleansing action rather than removing pollution by force. In Japan, in-situ soil and groundwater remediation research was rapidly developing, opening up new horizons for environmental remediation technology. This example of the smallest living organism confronting a massive environmental catastrophe was an important light for the future of environmental policy and technology.