A deep denitrification device for tail water of sewage plant based on methane oxidation

Abstract

The invention discloses a deep denitrification device for tail water of a sewage plant based on methane oxidation, which mainly includes a sludge digestion tank, a liquid storage tank, an aerated biological filter, a tower type biological filter and a sedimentation tank. The tank is connected with the first pipeline for supplying the surplus sludge of the sewage plant, the upper part of the sludge digestion tank is connected with the upper part of the liquid storage tank, and the upper part of the liquid storage tank is connected with the tail water supply pipeline of the sewage plant; the bottom of the liquid storage tank is connected with the exposure The upper part of the aerated biological filter is connected, the bottom of the aerated biological filter is connected with the upper part of the tower type biological filter, the bottom of the tower type biological filter is connected with the bottom of the sedimentation tank, and the outlet of the sedimentation tank is connected with the subsequent treatment pipeline. The beneficial effects of the present invention are: methane produced by anaerobic digestion of excess sludge in the sewage plant in the sludge digester flows into the tower biofilter to provide denitrification carbon source for the tower biofilter, and solves the problem of tail water depth in the current sewage plant Nitrogen removal requires additional carbon sources to increase operating costs and the disposal of excess sludge, and also reduces greenhouse gas emissions in the plant.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a deep denitrification device for tail water of a sewage plant based on methane oxidation. Background technique [0002] With the rapid development of the national urbanization process, the discharge of urban sewage continues to increase, resulting in deteriorating water environment and increasingly serious water pollution. In recent years, my country has accelerated the pace of construction of sewage treatment facilities, and the number of sewage plants has increased year by year. However, due to the backward technology of many early-built sewage treatment plants, the efficiency of nitrogen and phosphorus removal is low, and the effluent is not up to standard. At present, many sewage treatment plants in China are facing upgrading and transformation, so that the quality of effluent water can reach the first-class A standard of GB18918-2002. [0003] Nitroge...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a methane oxidation-based deep denitrification device for tail water in sewage plants to solve the problem of exhaust tail water caused by insufficient nitrification reaction or insufficient denitrification carbon source in the prior art. The total nitrogen in water exceeds the standard and the related external carbon sources increase operating costs, reduce greenhouse gas emissions from sewage plants, and dispose of excess sludge, etc.

Images