At present, Northern control The sludge double reflux - AOA deep nitrogen and phosphorus removal technology jointly developed by Water Affairs and Academician Peng Yongzhen of the Chinese Academy of Engineering has made a major breakthrough. It has carried out large-scale production applications in Shandong, Guangdong and other places, and has been successfully applied in more than 10000 tons of production lines. It has formed technologies and products with independent intellectual property rights, promoted the construction of green industrial chain, and demonstrated outstanding technical advantages.
According to public reports, in 2011, after the academician Peng Yongzhen team discovered the special phenomenon of shortcut denitrification, it carried out mechanism research for more than 10 years, and finally achieved the first technological breakthrough in the world and established relevant theories.
Beikong Water and Academician Peng Yongzhen of the Chinese Academy of Engineering jointly built the Academician Workstation. Starting from the characteristics of domestic water treatment, it took six years to tackle problems, successfully developed new AOA technology, and was selected into the New Development Pattern of Double Circulation enterprise White Paper.
Different from the characteristics of foreign sewage, China's water network is mostly mixed flow system. Under the background of mixed flow system, AOA technology can effectively solve the problem of high efficiency nitrogen removal of water quality with low carbon nitrogen ratio in view of the unstable sewage concentration.
AOA new technology has good effluent effect and stable water quality. The activated sludge process is the core technology of sewage treatment. The conventional process is limited by the sludge return ratio, and the total nitrogen removal rate is an industry problem. In the new AOA technology, the anoxic zone is placed behind, and the sewage flows through the anaerobic aerobic anoxic (A-O-A) biological reaction tank in turn. The removal efficiency of TN is significantly improved, the effluent effect is stable better than the first level A standard, and NH3-N and TN are stable better than the Beijing standard A. The new AOA technology can efficiently recycle the carbon source in the sludge, saving reagent input cost At the same time, it reduces the aeration rate of biochemical treatment, achieving nitrogen and phosphorus removal and energy saving Emission reduction The dual treatment effect is a powerful supporting technology for the WWTP to achieve the goal of "carbon neutrality".
In addition, the application of AOA new technology will also effectively reduce the sludge production. By tackling the "sludge pain" from the source, it can further reduce the carbon emissions in the whole life cycle of sewage treatment, while improving the water treatment efficiency by 50% on average, and promoting the construction of green industrial chain.
In order to overcome the difficulty in the application of sludge double reflux AOA technology from laboratory to practical engineering, Beikong Water established the first 100 ton pilot project at home and abroad in Haikou in 2019 based on a large number of research and verification. At the same time, based on the first generation product prototype and the formed systematic startup control strategy technology, in 2020, Beikong Water will quickly start the 10000 ton production verification, further breaking the bottleneck problem of the application of the sludge double reflux - AOA process first generation product 10000 ton conversion, and creating a record of far more than expected low temperature nitrogen removal in winter.
The new technology of Beikong Water AOA now has the technical conditions for large-scale project promotion. At the same time, in the process of large-scale application, it can further overcome the technical problems of software and hardware, form technologies and products with independent intellectual property rights, and gradually create a technical team capable of fighting a hard battle to help the government and other relevant units solve more pain points and difficulties in the field of water treatment.
It is reported that in the near future, Beikong Water will hold a technology application conference to release technology and transformation application achievements, and strengthen ecological environment Scientific and technological innovation, together with industry experts and upstream and downstream enterprises, promotes the construction of green industrial chain, deepens the battle against water pollution, and helps China achieve the goal of carbon peak and carbon neutrality as scheduled.
