Three kind methods of thermal hydrolysis, ultrasonication and microwave were used to pretreat the waste sludge Its influence on sludge disintegration effect was inspected through detecting pH, soluble protein, total sugar and SCOD contents et targets.

The background,principle,problems of some existing process and achievement in the ozone sludge reduction field are reviewed.

This paper has combined the latest research information at home and abroad,from three fields of global warming,increased concentrations of carbon dioxide,ozone destruction to introduce the influence of climate change on rice yield and quality.