Activated sludge filtering biochemical reactor and technical process thereof

Abstract

The invention relates to the field of sewage treatment equipment, in particular to an activated sludge filtration biochemical reactor and its technological process, comprising a reactor shell, a biochemical fan and a dosing device. The anoxic zone and the clarification zone, the anoxic zone, the aerobic zone and the clarification zone are connected in turn, the anoxic zone is connected to the water inlet pipeline, the anoxic zone, the aerobic zone and the clarification zone are equipped with aerators, and the biochemical fan passes through the air pipe The road is connected to the aerator, the clarification area is conical, and the cross-sectional area increases sequentially from bottom to top. The lower end of the clarification area is provided with a mixed liquid inlet, and the upper part of the clarification area is provided with an outlet weir. A plurality of inclined pipes with fixed intervals are arranged in the upper part of the middle and upper part of the clarification zone, a reflux device is arranged in the lower part of the clarification zone, and the reflux device is connected with the anoxic zone through the sludge discharge pipeline; The excess sludge output is small and the sewage treatment efficiency is high.

Description

technical field [0001] The invention relates to the field of sewage treatment equipment, in particular to an activated sludge filtering biochemical reactor and a process flow thereof. Background technique [0002] Looking back at the development of my country's wastewater treatment industry, especially the activated sludge process, it can be summarized as follows: it started late, developed rapidly, and has now entered the ranks of advanced technologies in the world. Domestic research on activated sludge reactors began in the 1960s. Beijing, Wuxi, Lanzhou and other places took the lead in using A / O activated sludge process to treat beer and wine tank sewage in the late 1980s. A / O activated sludge reactor is the leader of aerobic bioreactor, which is widely used in the treatment of domestic sewage and various organic wastewater. Compared with other activated sludge reactors, it has the characteristics of high volume load, short hydraulic retention time, low energy consumpti...

AI Technical Summary

Problems solved by technology

[0003] The traditional secondary sedimentation tank has solid-liquid separation, and the aeration tank cannot maintain a high activated sludge concentration. Generally, it can only form a concentration of about 1.5-3.5g / L, which limits the biochemical reaction rate

The hydraulic retention time HRT and the sludge age SRT are interdependent, and there is often a contradiction between increasing the volumetric load and reducing the sludge load, and the system will generate a large amount of excess sludge during operation, which increases the cost of sludge disposal

In addition, the phenomenon of sludge bulking often occurs, causing a certain amount of suspended solids in the effluent, which affects the quality of the effluent.

Images