活性碳技术（Activated carbon technology）.docVIP

活性碳技术（Activated carbon technology） The applicable range of activated carbon technology Activated carbon technology can be used to remove organic compounds with molecular weight less than 3000, especially molecular weight 500-1000. It can be used to remove water odor, ammonia nitrogen, nitrite nitrogen, disinfection by-products, precursors, microcystins and mutagenic active substances, and to solve the formaldehyde and biological instability based ozone security. However, the running effect of activated carbon is affected by many factors, such as water (temperature, PH, oxidant nutritional conditions, etc.) and operating parameters (contact time, filtration and backwashing), activated carbon and microbial properties etc.. Research and application status of activated carbon technology The application of activated carbon technology begins with the practice of removing odor in water, but with the increasing global environmental problems, people gradually transfer the research and application of activated carbon to organic matter removal. The application of activated carbon technology mainly has the following three kinds: (1) use granular activated carbon to replace part of sand filter material, and become carbon sand double layer filter medium filter (domestic also called biological active filter). The purification effect was better than that of sand filter, can reduce the times of backwashing, reduce the backwashing intensity, and can be quickly put into use, there are more suitable for water odor problems, and organic pollution is not serious area. However, due to the shallow pool of sand filter, activated carbon from simple physical adsorption to the saturated adsorption, water purification effect of this form is limited, and the activated carbon material than sand light, easy to run and operation process, but also for carbon is difficult. (2) replace all sand layers with granular activated carbon, that is, activated carbon adsorption and filtration. By this way, the