A kind of anaerobic ammonia oxidation bacteria immobilized bioactive filler, preparation and application

Abstract

The invention discloses anaerobic ammonia oxidizing bacteria fixed-type bioactive fillers, and preparation and an application thereof, and belongs to the technical field of water treatment. Fillers are each composed of a carrier and an embedding body and are fixed on a prefabricated frame to form the fixed-type bioactive fillers; each carrier is prepared by sewing multiple layers of polyvinyl alcohol non-woven fabrics and one layer of textile fabric; the embedding bodies are formed by boric acid cross-linking immobilization of an embedding liquid; the embedding liquid is formed by mixing an anaerobic ammonia oxidizing bacteria suspension and a polyvinyl alcohol solution. Each carrier is soaked in the embedding liquid, through boric acid secondary cross-linking, the non-woven fabrics and the bacteria embedding body are firmly bound together, the embedding body penetrates through textile fabric meshes to form a riveting fixing structure and does not easily fall off, and the good tensile property of the textile fabric improves the overall stability of the bioactive filler. The prepared bioactive fillers not only solve the problems that anaerobic ammonia oxidizing bacteria are low in concentration, are easy to lose and the like, but also have the advantages of strong strength, good stability, strong water flow impact resistant ability and the like, shorten the reaction start-up time, and have broad application prospects.

Description

Technical field [0001] The invention relates to the preparation and application of a fixed biologically active filler of anammox bacteria in the field of water treatment, in particular to a fixed biologically active filler using textiles and polyvinyl alcohol non-woven fabrics as carriers. Background technique [0002] Anaerobic ammonia oxidation technology (ANAMMOX) is currently the most economical biological denitrification pathway known. A study by Strous et al. of Delft University in the Netherlands showed that the biological reaction process including cell synthesis in the anaerobic ammonia oxidation process can be expressed as the formula ( 1) [0003] NH 4 + +1.32NO 2 ‐ +0.066HCO 3 ‐ +0.13H + → [0004] 1.02N 2 +0.26NO 3 ‐ +0.066CH 2 O 0.5 N 0.5 +2.03H 2 O (1) [0005] It can be seen from the biological reaction characteristics of ANAMMOX that compared with traditional nitrification and denitrification technology, ANAMMOX has the advantages of low oxygen demand, low operating ...

AI Technical Summary

Problems solved by technology

After experimental research and comparison, we found that the bioactive fillers prepared based on the traditional filler structure and embedding method did not perform well in the test, and there were many problems such as poor overall stability of the bioactive filler, easy falling off of the embedded body, and water-soluble swelling. question

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