July 15, 2024

 

China converts LNG byproducts into fish farms in sustainable energy initiative

China is pioneering an innovative approach to sustainable energy use by transforming the icy byproducts of liquefied natural gas (LNG) stations into thriving fish farms, China News Service reported.

 

This initiative, led by China National Offshore Oil Corp (CNOOC), is turning cold energy into a vital resource for aquaculture, showcasing the potential of green technology.

 

The project utilises the frigid temperatures generated during the LNG regasification process to create optimal conditions for cold-water aquatic species. This cutting-edge method is currently being piloted at the Guangdong Dapeng LNG terminal in Shenzhen, Guangdong province, with plans to expand to other coastal provinces with abundant LNG terminals.

 

Instead of discharging the large amounts of cold energy produced during LNG vaporisation and distribution into the ocean, CNOOC is using it for aquaculture within the terminal. This transformation of what was once considered waste into a valuable resource enhances fish farming capacities while reducing energy waste.

 

At the terminal, which is one of China's largest LNG receiving stations, approximately 1,000 kg of red snappers, lobsters, and other marine life are raised in the cold waters. Tests have shown that the marine life meets various physiological requirements.

 

An analyst noted that this approach is part of a broader trend in China's energy and environmental sectors to find innovative uses for byproducts and reduce waste. It sets a precedent for other countries with similar LNG infrastructures and has the potential to revolutionize global aquaculture practices.

 

While cold energy has previously been applied to low-temperature power generation and refrigerated storage, CNOOC is the first to use it for aquatic cultivation. This marks a significant step in the construction of modern "ocean ranches" within the domestic LNG industry, according to Li Ziyue, an analyst with BloombergNEF.

 

"During the regasification process of LNG, a substantial amount of cold energy is often wasted. If harnessed properly, it can greatly enhance energy efficiency and reduce emissions," Li said. "CNOOC's innovative approach can both utilize LNG cold energy and revolutionize the aquaculture industry."

 

The aquaculture experiment focuses on high-value fish species such as grouper and snapper, as well as seafood like shrimp, crab, and sea cucumber. The projected annual output is expected to reach 100,000 kilograms.

 

The use of cold energy in aquaculture is anticipated to reduce overall costs by 30% compared to traditional aquaculture methods. "Temperature control is a major cost factor in aquaculture, and this project will significantly reduce expenses while providing considerable economic benefits," said Cao Yueming, secretary-general of the seed branch of the Shenzhen Fisheries Industry Association.

 

-      China News Service