Killing method of red nematodes in biological aerated filter

Abstract

The invention relates to the technical field of sewage treatment and particularly relates to a killing method of red nematodes in a biological aerated filter. The killing method comprises the following steps: adding hydrogen peroxide into the biological aerated filter for being uniformly stirred; and treating water in the biological aerated filter for 10 minutes-20 minutes by using ultrasonic waves with frequency of 80Hz-90Hz and power of 100W. Adding amount of the hydrogen peroxide is 8mg / L-10mg / L. Ultrasonic waves with frequency of 80Hz-90Hz are compounded with the hydrogen peroxide to treat the red nematodes in the biological aerated filter, wherein treatment time is 10 minutes-20 minutes, and death rate of infant red nematodes within 2 hours can reach 80%, the infant red nematodes can be completely killed within 4 hours, and the death rate of the adult red nematodes reaches 100% within 8 hours; the water quality of the treated outlet water of the biological aerated filter is obviously improved. The method disclosed by the invention has the advantages which cannot be matched by a chemical method, the hydrogen peroxide is decomposed with time and temperature, so that not only are any chemical substances added into water, but also oxidative degradation ability of a biological film is not extremely damaged; meanwhile, the method is economical and cost-saving.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for killing red nematodes in biological aerated filters. Background technique [0002] In recent years, due to water pollution and water quality deterioration, a large number of aquatic organisms often appear in some urban sewage treatment plants that use biotechnology for sewage treatment. These aquatic organisms will affect the entire biological treatment system. In severe cases, it will affect the quality of the effluent water, resulting in substandard effluent . [0003] In April 2010, a large number of red nematodes (hereinafter collectively referred to as red nematodes) broke out in the biological aerated filter of the Shaying sewage treatment plant in Dongying City, Shandong Province, with a body length of 1-5 cm. The organism is at the top of the biological chain in the biological aerated filter, devouring a large amount of biofilm, seriously affectin...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above problems in the prior art that there is no good strategy for the prevention and treatment of red nematodes, the present invention provides a biological aerated filter that uses ultrasound and hydrogen peroxide to combine Method for killing red nematodes