Nitrospira granular sludge culture method and device

Abstract

The invention relates to a nitrospira granular sludge culture method and device. The culture method includes inoculating flocculent activated sludge into an SBR reactor for enrichment culture; operating the SBR reactor in a sequencing batch mode; feeding water into the SBR reactor through a water inlet tank; starting aeration and stirring at the same time after the water feeding is completed; controlling the water temperature in the SBR reactor to be between 29-31 DEG C and the sludge age to be 20 days; and after enrichment culture for 90-100 days, converting the flocculent activated sludge inoculated in the SBR reactor into brown nitrospira granular sludge. The method solves the problems of deviation from actual application conditions, lower concentration of volatile suspended solids in the mixed solution and higher energy consumption in the existing nitrospira granular sludge culture method, and has the characteristics of higher treatment efficiency and simple operation and management.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method and device for cultivating nitrospira granular sludge. Background technique [0002] Nitrite is a toxic substance. For the human body, nitrite will combine with iron hemoprotein in the blood, oxidize hemosiderin into methemoprotein, cause red blood cells to lose the ability to transport oxygen, and the human body will experience tissue hypoxia symptoms. , In addition, nitrite will also combine with ammonia nitrogen in the stomach to form nitroso or other compounds, which have carcinogenic effects; for water bodies, on the one hand, the degradation of nitrite will consume oxygen in the water, which is beneficial to the eutrophication of the water body, and on the other hand On the one hand, nitrite will also have a certain harmful effect on the growth of animals and plants in the water body. [0003] Nitrite exists widely in wastewater from many industries, and t...

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Problems solved by technology

[0006] In view of the above-mentioned problems existing in the prior art, the main purpose of the present invention is to provide a method and device for cultivating Nitrospira granular sludge, aiming at treating industrial wastewater with high nitrite concentration and solving the problems caused by incomplete denitrification. The problem of nitrite accumulation is applied to the study of the growth characteristics of nitrite oxidizing bacteria in short-cut nitrification, and to solve the deviation from actual application conditions and the concentration of volatile suspended solids in the mixed solution in the existing method of enriching and cultivating Nitrospira granular sludge. Low, energy-intensive issues

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