Energy crisis: Is waste cooking oil, after having its impurities removed, \"biodiesel\"?

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The bioenergy market is full of inconsistencies. In an era when the energy crisis affects the whole world, the bioenergy industry, which uses abundant oil-rich plants, animal fats, and used cooking oil as raw materials, has become very popular. Many provinces in China as well as dozens of enterprises are involved in the biodiesel industry, competing to announce that they possess key technologies. In fact, since the relevant **technical standards have not yet been finalized, the domestic bioenergy market remains chaotic, and there are still many doubts as to whether biodiesel can play a significant role in the renewable energy sector. 　　The energy crisis has led to a significant increase in the value of bioenergy. As a net importer of oil, rising international oil prices have posed a threat to our country’s energy security due to the large volume of oil that must be imported. Currently, the use of diesel in automobiles has become a trend in the automotive industry. Experts predict that by 2010, the world’s demand for diesel will increase from 38% to 45%, resulting in an even more severe shortage of diesel supply. Professor Song Baoan, Vice President of Guizhou University and Director of the Renewable Energy Research Center, said that the issue of supply and demand balance for diesel will be one of the key challenges in the development of China’s oil market in the future. In recent years, despite continuous technological upgrades by refining and petrochemical enterprises, which have led to an increasing production ratio of diesel to gasoline, this still fails to meet the required consumption ratio of diesel to gasoline. Biodiesel is a fatty acid monoalkyl ester produced through an esterification reaction, using raw materials such as fruits, seeds, vegetable oils or animal fats, as well as waste cooking oils. It is understood that biodiesel technology was developed in Germany in 1988. China began producing biodiesel in 2001; currently, there are dozens of companies across the country engaged in its production, with an annual output of over 100,000 tons. Song Baoan said that biodiesel has several clear advantages: it has a low sulfur content, which can reduce sulfur dioxide and sulfide emissions by about 30% ； Biodiesel has good lubricating properties, which can reduce wear on the fuel injection pump, engine cylinder block, and connecting rods, thereby extending their service life ； Biodiesel has excellent fuel properties, and it is safer in terms of transportation, storage, and use compared to conventional diesel. Furthermore, biodiesel is a renewable energy source and also an energy source with high biodegradability. The outstanding environmental friendliness and renewability of biodiesel have attracted great attention from developed countries around the world, especially those with scarce resources. Germany has applied biodiesel to cars such as Mercedes, BMW, Volkswagen, and Audi, and there are currently over 900 biodiesel fuel stations across the country. Other developed and developing countries such as the United States and India are also actively developing the biodiesel industry. Currently, the world’s annual biodiesel production exceeds 3.5 million tons, and it is expected to reach over 30 million tons by 2010. “Burning \"gutter oil\" after removing impurities does not result in \"biodiesel\". According to the Renewable Energy Development Center at the Energy Research Institute of the National Development and Reform Commission, China’s biodiesel production capacity could reach 200,000 tons by 2010 ； By 2020, it is to reach 2 million tons. However, it is understood that due to the lack of a set of standardized physical and chemical criteria for biodiesel, the biodiesel market is rather chaotic. Professor Yang Song from the Renewable Energy Research Center at Guizhou University said that in recent years, some regions in China have shown great enthusiasm for biodiesel projects, leading to a rush to develop such initiatives. These companies use gutter oil or other raw materials; after removing impurities and undergoing slight processing, they claim to have produced \"finished biodiesel\" which is then sold to users such as agricultural tractors and rural generators. This approach not only results in low efficiency and high pollution levels, but it also causes damage to machinery. Currently, there are many enterprises and organizations in China making such investments, and many of them claim to have developed biodiesel production technologies with independent intellectual property rights. But in reality, the level of related technology is mixed, which leads to low-quality, inferior, and highly polluting biodiesel entering the market, especially in rural areas, where the quality of biodiesel varies greatly. Apart from technical bottlenecks, the greater obstacle to the development of biodiesel in our country is a shortage of raw materials. Lu Dachang, deputy director of the Guizhou Provincial Development and Reform Commission, said that due to the slow progress in the development of oilseed plant bases, a shortage of raw materials remains a \"fatal\" obstacle to the growth of China’s biodiesel industry. For example, in the case of the castor oil plant, which has a high oil content, its seed yield is greatly influenced by climate conditions and farming practices. **It is necessary to improve services for farmers and establish scientific and standardized planting bases, so as to truly benefit them and ensure a stable source of raw materials. The bioenergy industry needs substantial policy support. Experts interviewed by the journalist suggested that developing biodiesel is in line with the trend toward industrialization, and it represents one of the important strategic measures for ensuring China’s oil security. The market prospects for biodiesel are very promising, but more favorable policies are still needed to drive its development. Experts suggest that to develop the bioenergy industry, it is necessary to **integrate policies such as converting farmland back to forests, afforesting barren mountains, and addressing rocky desertification in order to promote the establishment of production bases. The southwest region boasts rich biodiversity, providing excellent conditions for the development of the bioenergy industry. Moreover, it belongs to the oil-poor areas of the south, where there is a significant imbalance between supply and demand for petroleum and diesel. **Advanced domestic technologies and resources should be integrated, leveraging existing strengths to establish China’s own “green oil fields” as soon as possible. Furthermore, our country should also introduce specific measures to facilitate the entry of biodiesel into the market. It is understood that although China’s Renewable Energy Law has established the legal status of biodiesel and stipulates that nothing shall prevent its entry into major sales channels such as gas stations, our support policies for the biodiesel industry remain weak compared to those in developed countries. The EU requires countries to reduce the tax rates on biodiesel and to set mandatory limits on the proportion of biodiesel that can be used as fuel in vehicles in Europe. The U.S. Department of Energy also mandates through policies and regulations that a certain percentage of vehicles in the federal, state, and public sectors must use biodiesel. Germany offers complete tax exemptions for the production of biodiesel, and has installed gas stations along intercontinental highways, requiring that biodiesel be sold only on major traffic routes. The relevant supporting measures in our country to foster the development of the bioenergy industry still need to be further refined and clarified.