Taking Changchun Shuangyang Wastewater Treatment Plant as example, the controlling methods of activated sludge culture and debugging operation of CAST at low temperature in the winter were introduced.
以长春市双阳污水处理厂为例，介绍了CAST工艺在冬季低温条件下活性污泥培养与调试运行的控制方法。
2
Field trials were made on winter wheat, maize and rape, the results show a sharp yield increase by the application of these sludge fertilizers.