Water treatment operation method for enhanced biological nitrogen removal based on optimized utilization of carbon source

Abstract

The invention discloses a water treatment operation method for enhanced biological nitrogen removal based on optimized utilization of a carbon source. The water treatment operation method comprises the following steps: separating influent water through a primary sedimentation tank, and increasing C / N in a limited manner; enhancing an endogenous oxygen consumption process; separating and reasonablyutilizing high-quality and poor-quality carbon sources; perform influent water separation in different forms in the primary sedimentation tank and controlling different hydraulic retention time. According to the water treatment operation method, through separation and reasonable allocation and utilization of the high-quality carbon source and the poor-quality carbon source in sewage, the poor-quality carbon source is applied to consumption of internal reflowing dissolved oxygen during sewage treatment and the high-quality carbon source is applied to the denitrification process in the sewage treatment, so that the biological nitrogen removal efficiency is obviously improved under the condition that the carbon source is not added or added in a limited manner; through control over the influent water separation in different forms in the primary sedimentation tank, the colloidal carbon source can flocculate and precipitate, so that the poor-quality carbon source in the sewage is further separated from the sewage; through control over the different hydraulic retention time, the poor-quality carbon source can fully contact the internal reflowing dissolved oxygen so as to ensure elimination of the dissolved oxygen and avoid the dissolved oxygen and denitrification from competing the high-quality carbon source.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a method for optimizing the utilization of carbon sources, eliminating internal backflow dissolved oxygen, and improving the biological denitrification process by adjusting the operation mode of water treatment. Background technique [0002] In recent years, the water quality and quantity characteristics of municipal sewage have changed significantly, and the nitrogen and phosphorus content in sewage have increased significantly. Relevant departments have become more stringent in the supervision of the operation of sewage treatment plants. Because of its own deficiency, it has become a difficult problem for research and improvement. From the previous level B to level A and then to the quasi-IV category, from the removal of carbon and phosphorus to the removal of nitrogen and phosphorus as the core, national standards and local standards have continuously raised the requirements for ...

AI Technical Summary

Problems solved by technology

[0005] For the problem of low biological denitrification efficiency, we use the method of limitedly increasing C / N, introducing endogenous oxygen consumption process at the front end of the anoxic section, and optimizing the use of high-quality and low-quality carbon sources to eliminate dissolved nitrogen in the internal reflux. Oxygen to ensure sufficient carbon source for denitrification, thereby improving the denitrification effect

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