Device and method for rapidly starting and stably maintaining municipal sewage short-cut nitrification on basis of triclosan

Abstract

The invention relates to a device and method for rapidly starting and stably maintaining municipal sewage short-cut nitrification on the basis of triclosan, and belongs to the field of sewage biological treatment. The device disclosed by the invention mainly comprises a municipal sewage raw water tank, a municipal sewage short-cut nitrification device, an intermediate water tank, a triclosan sludge treatment device, a triclosan drug box and a sludge backflow device; and the method comprises the steps of: after carrying out pretreatment on triclosan activated sludge, rapidly starting municipalsewage normal-temperature short-cut nitrification by utilizing different recovery conditions of AOB and NOB; and then carrying out triclosan inhibition treatment on part of sludge by the triclosan sludge treatment device, so as to improve stability of short-cut nitrification, implement stable nitrite accumulation and provide substrate bases for subsequent municipal sewage normal-temperature anaerobic ammonium oxidation denitrification. Meanwhile, the method does not need to control harsh environment conditions to start the short-cut nitrification process and is easier to implement, and short-cut nitrification can be continuously and stably operated.

Description

technical field [0001] The invention belongs to the field of biological treatment of sewage, and relates to a device and method for quickly starting and stably maintaining short-range nitrification of urban sewage at room temperature based on triclosan, and is especially suitable for biological denitrification treatment of urban sewage with a low carbon-to-nitrogen ratio. Background technique [0002] With the development of industrialization, the harm caused by human production activities to the water environment is becoming more and more serious. Among them, the discharge of nitrogen-containing wastewater and the eutrophication of water caused by it have also attracted people's continuous attention. Sewage treatment methods include physical, chemical and biological methods. For the denitrification process, biological denitrification is the most widely used, because the biological denitrification method is more economical, efficient, and has no secondary pollution under the...

AI Technical Summary

Problems solved by technology

(4) The optimum temperature of AOB and NOB is different. It is generally believed that when the system temperature is higher than 30°C, the growth rate of AOB is higher than that of NOB, which leads to the occurrence of short-range nitrification

The method of using triclosan to achieve short-range nitrification has not been reported yet, but it has been reported that triclosan above 1mg / L can inhibit the nitrification process. Specifically, how to use triclosan to achieve short-range nitrification and whether the achieved short-range nitrification is long-term stability has not been studied

Images