This paper deals with the application of hydrolysis-acidification process to pretreat the wastewater containing refractory organics,elaborates the principle of the pretreatment process,analyzes some factors affecting the pretreatment efficiency,and points out that hydrolysis-acidification is an effective pretreatment process for the wastewater containing refractory organics.

Treatment of sorbic acid wastewater by neutralization,hydrolytic acidification, bio-contact oxidation,flotation and adsorption process;

Study on the treatment of stick oil wastewater by hydrolytic acidification-biological contact oxidation process;

Research on the hydrolytic acidification-contact oxidation treatment of rosin processing effluent;

Improving biodegradability for oilfield produced water by hydrolysis and acidification process;

Studies on treatment of printing and dying wastewater by hydrolysis and acidification-SBR technology;

Study on treatment of printing and dyeing wastewater by hydrolysis and acidification-activated sludge

Research on domestic sewage treatment by hydrolysis-acidification reactor;

Studies on the character and effect of hydrolysis-acidification under extreme temperature;

Present situation of the chemical technological research on anaerobic hydrolysis-acidification and its application to organic wastewater pretreatment;

Pilot-scale study on treatment of dairy wastewater with hydrolysis acidification-SBR technology;

Physicochemical-hydrolysis acidification-biological contact oxidation process for starch wastewater treatment;

Treatment of mixed chemical wastewater by hydrolysis acidification-aerobic process;

The performance of hydrolysis-acidification-MBR processes treating washing-wastewater was investigated in the pilot-scale experiments.