In order to promote the investigation development of CAST process,especially highly influent Nitrogen CAST Process’s production and operation testing research, a series production tests were carried out in Lijiatuo WWTP as the experimental field, from sludge cultivation and domestication, CAST process debugging, to operation optimization.

Analysis and discussion of sludge disposal and treatment of sewage treatment plants in China;

Using biofilter to remove odor of sewage treatment plant;

Application of polyureas sealants in sewage treatment plant project;

Improvement in the determination of COD_(Cr) in municipal wastewater treatment plants;

Development and application of the municipal wastewater treatment plant performance evaluation system;

Feasibility study on building small towns wastewater treatment plants by BOT model;

Reasons for inlet pump frequent alarms in Puyang municipal sewage plant and its improvement resolutions;

Study on construction feasibility in small urban sewage plants;

Siting of the sewage plant in Dezhou City;

Understanding Energy Saving and Emission Reduction in WWTPs from Microcosmic Mechanism;

Case Study on Process Optimization and Reconstruction of a Large-scale WWTP;

Treatment of Soft Soil Foundation for Construction of WWTP in Intertidal Zone;

The characteristics and the difficulties of non-stop production reformation in sewage treatment works were analyzed in this paper.

It illustrates existing circumstances of the building of sewage treatment works and the main points of sewage treatment,introduces debugging contents of sewage treatment system,and illustrates debugging work from preparatory work,culturing and taming of activated sludge,and controlling of parameter,which to meet the result of sewage treatment.