(1) Three bio - methods for sludge reduction including aerobic digestion, anaerobic digestion and predation by T.

(2) A pilot scale facility of autothermal thermophilic aerobic digestion (ATAD) was designed for stabilization of urban sewage sludge.

(3) The obvious alternatives are based on aerobic digestion like those used in developed countries.

(4) The results show that the aerobic digestion may reduce the content of organic substances and the sludge odor.

(5) A. hemPrichi could use the organic fragments in sludge to grow when the sludge was on aerobic digestion, and accelerate sludge reduction rate.

(6) If it can successfully build a high-rate solid-waste system, there might also be an opportunity to employ the technology in the developing world to treat the sludge produced by aerobic digestion.

(7) Appling the mixed sludge of raw sludge and waste activated sludge from sewage waste water treatment plant, this paper studies the factors during aerobic digestion process.

(8) In order to raise the efficiency and to save the construction land, this research applied electrochemical treatment method based on the relevant study on sludge aerobic digestion.