Preparation and application of ammonia oxidizing bacteria sandwich-type multilayer immobilized bioactive filler

Abstract

The invention discloses preparation and an application of an ammonia oxidizing bacteria sandwich-type multilayer immobilized bioactive filler, and belongs to the technical field of water treatment. The ammonia oxidizing bacteria bioactive filler is composed of two parts: embedding bodies loaded with ammonia oxidizing bacteria and non-woven carriers; the embedding bodies and the non-woven carriers are alternatively arranged; fiber yarns of the non-woven carriers and the embedding bodies are combined into a stable organic whole, an embedding liquid prepared by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution evenly coats the non-woven carriers, and multiple layers of carriers are overlaid together, after boric acid secondary cross-linking, the embedding liquid is cured to form the embedding bodies, and the embedding bodies are combined with the non-woven carriers to form a layered filler having a sandwich-like structure, and then the ammonia oxidizing bacteria granular bioactive filler is prepared through cutting the layered filler. The problems that the ammonia oxidizing bacteria are difficult in advantage establishment and are easy to lose are solved, the processing ability of a reactor is improved, and moreover, the sandwich-like layered structure formed by the non-woven fabrics and the embedding bodies improves the stability of the bioactive filler.

Description

technical field [0001] The invention relates to the preparation and application of an ammonia-oxidizing bacteria sandwich type multi-layer immobilized bioactive filler in water treatment, belonging to the field of water treatment. Background technique [0002] Today, the problem of ammonia nitrogen pollution is becoming more and more serious. Ammonia nitrogen has become a new constraint indicator for emission reduction during the 12th Five-Year Plan. Improving the level of ammonia nitrogen pollution prevention and control has become a necessary measure to improve the quality of water environment. At present, ammonia nitrogen wastewater treatment methods are divided into three categories, physical and chemical methods, biochemical methods and advanced oxidation methods. Due to the mature process and stable performance, the biochemical method is recognized as an economical, effective and most promising method. Biochemical methods include activated sludge method and biofilm me...

AI Technical Summary

Problems solved by technology

This method is simple to operate, but has great limitations. The prepared biological filler is prone to water-soluble swelling. During use, the mechanical strength of the filler will be greatly weakened due to water-soluble swelling, and even breakage will occur, thus shortening the service life of the filler. , cannot be ideally applied to engineering practice

Experimental studies have shown that the bioactive fillers prepared by combining traditional carriers such as Raschig rings, Pall rings, stepped rings, and suspended modified fillers with embedding bodies through adhesion have poor overall stability and poor embedding. The body is easy to fall off, the bacteria are easy to lose, etc.

Images