[1] Li H., Jin Y. Y., Mahar R., et al. Effects and model of alkaline waste activated sludge treatment. Bioresour. Technol., 2008,99(11):5140-5144
[2] Peng Y. Z., Wang X. L., Li B. K. Anoxic biological phosphorus uptake and the effect of excessive aereation on biological phosphorus removal in the A2O process. Desalination, 2006,189(1-3):155-164
[3] Feng L. Y., Chen Y. G., Zheng X. Enhancement of waste activated sludge protein conversion and volatile fatty acids accumulation during waste activated sludge anaerobic fermentation by carbohydrate substrate addition: The effect of pH. Environ. Sci. Technol., 2009,43(12):4373-4380
[4] Ucisik A. S., Henze M. Biological hydrolysis and acidification of sludge under anaerobic conditions: The effect of sludge type and origin on the production and composition of volatile fatty acids. Water Res., 2008,42(14):3729-3738
[5] Tong J., Chen Y. G. Recovery of nitrogen and phosphorus from alkaline fermentation liquid of waste activated sludge and application of the fermentation liquid to promote biological municipal wastewater treatment. Water Res., 2009,43(12):2969-2976
[6] Min K. S., Park K. S., Jung Y. J., et al. Acidogenic Fermentation: Utilization of wasted sludge as a carbon source in the denitrification process. Environ. Technol., 2002,23(3):293-302
[7] Xu G. H., Chen S. H., Shi J. W., et al. Combination treatment of ultrasound and ozone for improving solubilization and anaerobic biodegradability of waste activated sludge. J. Hazard. Mater., 2010,180(1-3):340-346
[8] Chen Y. G., Jiang S., Yuan H. Y., et al. Hydrolysis and acidification of waste activated sludge at different pHs. Water Res., 2007,41(3):683-689
[9] Ferreiro N., Soto M. Anaerobic hydrolysis of primary sludge: Influence of sludge concentration and temperature. Wat. Sci. Technol., 2003,47(12):239-246
[10] Zeng R. J., Yuan Z., Keller J. Effects of solids concentration, pH and carbon addition on the production rate and composition of volatile fatty acids in prefermenters using primary sewage sludge. Wat. Sci. Technol., 2006,53(8):263-269
[11] Yuan Q., Sparling R., Oleszkiewicz J. A. Waste activated sludge fermentation: Effect of solids retention time and biomass concentration. Water Res., 2009,43(20):5180-5186
[12] Feng L. Y., Wang H., Chen Y. G., et al. Effect of solids retention time and temperature on waste activated sludge hydrolysis and short-chain fatty acids accumulation under alkaline conditions in continuous-flow reactors. Bioresour. Technol., 2009,100(1):44-49
[13] Elefsiniotis P., Wareham D. G., Smith M. O. Use of volatile fatty acids from an acid-phase digester for denitrification. J. Biotechnol., 2004,114(3):289-297
[14] Chen Y. G., Andrew A. R., Terrence M. The efficiency of enhanced biological phosphorus removal from real wastewater affected by different ratios of acetic to propionic acid. Water Res., 2004,38(1):27-36
[15] Cokgor E. U., Oktay S., Tas D. O., et al. Influence of pH and temperature on soluble substrate generation with primary sludge fermentation. Bioresour. Technol., 2009,100(1):380-386