Slow-release carbon source filler for enhancing denitrification nitrogen removal and preparation method thereof

Abstract

A slow-release carbon source filler for enhancing denitrification nitrogen removal is provided. The slow-release carbon source filler comprises surface-layer fillers, an interlayer carbon source and filler shells, wherein each surface-layer filler comprises a filler substrate and a biodegradable carbon source; the biodegradable carbon sources cover the filler substrates; the interlayer carbon source is a slow-release biodegradable carbon source; the filler shells are plastic components which are provided with buckles and can be connected and combined with each other; the surface-layer fillersare arranged in the filler shells, the interlayer carbon source is arranged on the surface-layer filler, the two filler shells are spliced and fixed, and the interlayer carbon source is clamped between the two surface-layer fillers through the filler shell, so that the carbon source is provided for denitrification, and the removal of total nitrogen is promoted. The invention also provides a preparation method of the slow-release carbon source filler for enhancing denitrification nitrogen removal. The invention provides the slow-release carbon source filler capable of enhancing denitrificationnitrogen removal and the preparation method thereof, and the slow-release carbon source filler is long in carbon release time, stable in carbon release effect and capable of giving consideration to cost.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a slow-release carbon source filler for strengthening denitrification and denitrification and a preparation method thereof. Background technique [0002] At present, my country's environmental pollution is becoming more and more serious. Many cities have promulgated new tail water discharge standards for urban sewage treatment plants, and the requirements for nitrogen removal are also stricter. Biofilm method has been paid more and more attention as an efficient nitrogen removal method. Microorganisms are fixed in the biofilm reactor with the filler as the carrier, and gradually form a stable biofilm structure. With the thickening of the biofilm layer, the mass transfer resistance of dissolved oxygen in the film increases, resulting in a dissolved oxygen gradient from outside to inside in the biofilm, forming an aerobic-anoxic microenvironment. Anoxic denitrifying bacter...

AI Technical Summary

Problems solved by technology

However, in biofilm reactors, traditional dosing of carbon sources has the problems of low utilization rate and high cost, and the dosage is not easy to control, which may easily lead to excessive COD in the effluent

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