The world's first biological aerated filter was put into operation in France on 198 1, and then it was widely used in European countries. The United States, Canada and other American countries introduced this technology in the late 1980s, and Japanese, Korean and China Taiwan Province Province also introduced this technology one after another. Larger international environmental protection companies, such as Deliman Company of France, Philip Muller Company of Germany and Veolia Company of France, all promote it as a fist product all over the world. In Chinese mainland, biological aerated filter is being popularized. Malanhe Sewage Treatment Plant in Dalian is the first municipal sewage treatment plant in China (designed by Northeast Municipal Institute), and the sewage treatment plant in the eastern suburb of Xinhui, Guangdong Province adopts hydrolysis-aeration biological filter (designed by MCC Ma Yuan). This technology is also used to treat some industrial wastewater in China. Many scientific research and design units in China have also carried out experimental research on biological aerated filter. With the continuous popularization and popularization of biological aerated filter in the world, many scholars have made concrete research on its structure, function, start-up and filter material, and achieved many results.
Problem prospect
As a brand-new water treatment process, biological aerated filter is being popularized. According to the research and application, there are still many problems to be studied in the future:
Characteristics of biofilm and its rapid start-up mode; The relationship between biological oxidation function and filtration function; The shedding law of biofilm during backwashing; Further broaden the application scope of biological aerated filter, and study how to combine it with other processes in advanced water treatment, micro-pollution source water treatment, refractory organic matter treatment, low-temperature sewage nitrification and low-temperature micro-pollution water treatment.
The research on the core medium filter material of biological aerated filter will also promote the application scope of this process in China. Both BIOSTYR and Biofor have strong functions, but there are still some problems in their wide application in China, such as patent problems and large investment, which also hinder their wide application in China.
Therefore, the research and localization of special filter materials will be the key to the wide application of biological aerated filter in China.