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Chinese scientists Zhang Ruihong invented the "garbage change energy" technology and successfully entered the market in the United States. Recently, Clean World partners launched the biological digestion system of Zhang Ruihong, professor of biology and agricultural engineering at the University of California, Davis. This is also the first US food processing plant to use food waste, as well as waste paper box power plant.
Over the past decade, Zhang Ruihong has been working on the development of anaerobic digestion technology, trying to convert solid waste into renewable energy. In 2006, she upgraded this technology from the laboratory to the demonstration stage. At that time, officials from the federal, state, and local levels, as well as the Chinese Consul General in San Francisco, attended the ribbon-cutting ceremony for the new renewable energy demonstration system.
Subsequently, Emerging Enterprises Clean World Partners in Sacramento acquired the right to use technology from the University of California, Davis. “I very much appreciate Professor Zhang’s remarkable achievement,†said Linda Katehi, supervisor of the University of California, Davis. “Scientists like Professor Zhang Ruihong are helping the University of California, Davis, to solve the most pressing global issues of our time. Sexual issues. Her work has led us to a big step toward the sustainable development that everyone is longing for."
The anaerobic digestion system was placed in American River packaging. It will convert 7.5 tons of food waste from food processing plants in the area each day, and half a ton of non-recyclable corrugated material from U.S. River Packaging Corporation into natural gas. The system generates about 1300 kWh of renewable energy each day, which can meet 37% of the electricity demand of U.S. river packaging companies, and can reduce approximately 2,900 tons of garbage into landfills each year. The project also created 22 jobs.
“These kinds of projects and technologies actually create a new way of thinking about waste as a resource. It will eventually bring about a better world, a cleaner environment, and new jobs.†Zhang Ruihong said.
Anaerobic digestion relies on bacteria decomposing biodegradable waste materials in an oxygen-deficient environment. Zhang Ruihong's system converts this type of waste into valuable by-products such as renewable energy, compost, water, and natural fertilizers. Although anaerobic digestion itself is not a new technology, operational and material handling deficiencies have hindered its commercialization.
Zhang Ruihong's efficient digestion technology is different from most other similar technologies. The latter mainly deals with liquid waste, such as manure from dairy farms and municipal wastewater. And her technology can simultaneously transform liquid and solid waste, including food waste, yard waste, plant residues, paper and cardboard.
Zhang Ruihong also tried to overcome two key issues that hinder the widespread use of anaerobic digestion systems: time and cost. This new technology makes such garbage conversion systems replicable and many components can be prefabricated, reducing the time required to build the system. For example, this device placed by the Clean World Partner Company within the United States River Packaging Corporation took only 90 days from empty to energy production, and cost between 2 million and 3 million US dollars. In addition, this system converts waste into energy, which is half the time of other digestive equipment, but it can produce more gas that can be converted into clean energy later.
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