Recently，The utility model patent "An Online Nitrogen Meter Sampling Pretreatment Device for Biochemical Tanks in Sewage Plants" applied by bc.game casino and Drainage Company has been recognized by the State Intellectual Property Office，This patent was independently developed by the Wastewater Treatment Branch，It is bc.game casino and Drainage Company’s first technological innovation in the sewage treatment sector based on the strategic deployment of localized substitution and green and low-carbon operation requirements。

Everyone knows，Carbon source costs account for more than 60% of the entire sewage treatment chemical cost，The nitrate nitrogen meter located at the end bc.game casino pool serves as a "compass" for precise carbon source dosing and directly affects the amount of carbon source added。But，The traditional control method based on total nitrogen at the end outlet bc.game casino pool is relatively extensive，Data analysis is not timely，Unable to accurately add carbon source。How to use the nitrate meter in the front section bc.game casino pool to move the control forward，And the original sensor of the nitrate nitrogen meter can eliminate the interference of activated sludge，Become a carbon source control、The key to accurate dosing。

In response to this problem，bc.game casino and Drainage Company forms a technical research team，Analysis of defects in imported equipment，Redesigning water sampling、Sludge Shield、Innovative design of soda rinse，All machine accessories are domestically customized，20% lower price than imported sampling pretreatment equipment......Team overcoming difficulties，A national utility model patent applied to "precise online nitrate nitrogen control at the end of the biochemical pool" came into being。At present, all Yundong sewage treatment plants have been promoted and used，Move forward through the online nitrate meter and control it stably and accurately，Overall carbon source cost reduced by 50%，This equipment was unanimously recognized by the review expert judges as having great product value。

The sewage treatment business process contains a large number of innovation points that can be explored，Next step，bc.game casino and Drainage will give full play to the power of scientific and technological innovation，Combining new productivity and sewage equipment productization development trends，Focus on technological innovation and continuous efforts，Contribute to the high-quality development of the water industry。

(Contributed by Chen Kai and Yang Qian of bc.game casino and Drainage Company)