Two-stage self-circulation split aeration combined tower for treating nitrogen-containing wastewater containing organic matter

Abstract

A two-stage self-circulation split aeration combined tower for treating nitrogen-containing wastewater containing organic matter comprises a first-stage aeration column, a first-stage reaction column,a second-stage aeration column, a second-stage reaction column, aeration discs are arranged at the bottoms of the aeration columns, water distribution pipes are arranged at the bottoms of the reaction columns, and a DO probe for detecting the concentration of dissolved oxygen is arranged in the reaction column. Granular sludge is cultured in the first-stage aeration column and the second-stage aeration column, and the first-stage aeration column, the first-stage reaction column, the second-stage aeration and the second-stage reaction column achieves combination of first-stage self-circulationseparate aeration and second-stage self-circulation separate aeration for treating wastewater. According to the two-stage self-circulation split aeration combined tower disclosed by the invention, circular flow of wastewater between the reaction columns and the aeration columns is realized under the condition of no external power source, and the energy consumption in a wastewater treatment process is reduced. After the sewage circularly flows for multiple times between the first-stage reaction column and the corresponding aeration column, the purpose of removing organic matter in the wastewater is achieved; and wastewater circularly flows between the second-stage reaction column and the second-stage aeration column, so that denitrification treatment of the wastewater is realized.

Description

technical field [0001] The present invention relates to a combined tower for sewage treatment, more specifically, it relates to a process for treating nitrogen-containing wastewater containing organic matter, using various functional bacteria to make the sewage reach the standard for discharge or reuse. A two-stage self-circulating separate aeration combined tower for nitrogen-containing wastewater. Background technique [0002] At present, the treatment process of organic nitrogen-containing wastewater usually aims to remove organic matter and nitrogen in sewage. These pollutants can be degraded by microorganisms in sewage and consume dissolved oxygen in water, causing eutrophication of water body. [0003] The traditional process of treating wastewater containing organic matter and nitrogen includes AO, AAO, etc., but the traditional sewage treatment method requires a high C / N ratio, and consumes a lot of energy, has a large amount of residual sludge, and the process is co...

AI Technical Summary

Problems solved by technology

[0003] The traditional processes for treating wastewater containing organic matter and nitrogen include AO, AAO, etc., but the traditional sewage treatment method requires a high C / N ratio, and consumes a lot of energy, has a large amount of residual sludge, and the process is complicated, and the traditional sewage treatment method cannot achieve to high sludge concentrations

In practical applications, the application of aerobic granular sludge is seldom, mainly because the existing method of cultivating aerobic granular sludge takes a long time to cultivate, and cannot maintain stability for a long time, and there are uncertainties in control parameters, etc.

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