Treatment of domestic wastewater by CAST v0.9.11 1CD circulating activated sludge process
Circulating activated sludge method (a kind of domestic sewage treatment process, it is based on the SBR process, the addition of the selector and sludge return facilities, and the timing of some adjustments, thus greatly
The reliability and efficiency of SBR process are high. )
Compared with the conventional SBR method, the main characteristic of this process is that the SBR pool is divided into three zones, and the biological selection area has the function of preventing sludge bulking and removing the organic matter and removing phosphorus effectively, at the same time
Improved the biodegradability of sewage. The combined oxygen zone has the role of reverse catalytic denitrification and phosphorus removal as well as the transition from anaerobic zone to aerobic zone. The main aeration zone is the main reaction zone of cast reaction pond, with
It has the function of organic degradation, nitrification and phosphorus removal. So in the cast reaction tank in the space anaerobic-hypoxia-aerobic three kinds of environment, the mixing liquid in the pool is intermittent mixing-pushing flow, but the water is still
is intermittent. These characteristics are beneficial to the removal of organic matter and denitrification and phosphorus removal. The biological selection area of the cast reaction pool is intermittently entered by the pre-treatment of the original water through the grating and the sand-sinking pond, and the master from the cast reaction pool
The recirculation sludge of aeration zone is mixed, biochemical reaction occurs, and then into the oxygen zone of the cast reaction pool, and the nitrate nitrogen which is brought into the reflux sludge is anoxic denitrification and denitrification, and also can be
The oxygen zone regulates anaerobic release of phosphorus, and the final mixture flows into the main reaction zone of the cast reaction pool, and the degradation, nitrification and phosphorus removal of the organic matter are carried out and then discharged by settling the supernatant.
The cast reaction pond consists of three parts: the biological selection area, the oxygen region and the main aeration zone.
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Treatment of domestic wastewater by CAST v0.9.11 1CD circulating activated sludge process