2) SBR process
SBR process as early as the early 20th century has been applied, due to the difficulties and cumbersome manual management is not in the promotion and application. This method sets the water, aeration, precipitation in a pool to complete. Generally composed of a number of ponds, the pool of working conditions in turn transform the operation, a single pool by the skimmer intermittent water, it is also known as sequencing batch activated sludge method.
The process of the traditional aeration tank, sedimentation pool from the spatial distribution of the distribution of time to form an integrated structure of the intensive, and conducive to the realization of a compact module layout, the biggest advantage is to save space. In addition, you can reduce the sludge back flow, energy saving effect. Typical precipitation of the SBR process stops the water, and the static precipitation can achieve higher precipitation efficiency and better water quality.
Developed by the SBR and CASS and CAST and other processes, in the phosphorus and nitrogen removal and automatic control, and other aspects of the new features.
However, the SBR process requires a high degree of automation control and requires a large number of electrically controlled valves and mechanical skimmers, which can not be operated with a slight failure and generally require the introduction of a full set of imported equipment. As a pool of a variety of functions, the relevant equipment had to be idle, the number of aeration and blower capacity must be slightly larger. The overall volume of the pond is not reduced. In addition, because the water pressure is usually 1.2-2 meters, the water level of the water must be designed according to the minimum water level, so the total hydraulic height than the general process to about 1 meter high, energy consumption will be improved.
SBR process is generally applicable to small and medium-sized, land tension, with the introduction of equipment conditions of the occasion.