关键词:

强化生物除磷, 碳源, 底物贮存, PHA, 聚磷菌

Abstract:

It was investigated that the effect of type of carbon sources, including acetic acid/propionic acid=1/2, acetic acid/propionic acid=2/1, propionic acid, methanol, ethanol, glucose, starch and domestic wastewater, on anaerobic substrate storage and conversion of activated sludge domestricated cultured with sodium acetate with removing phosphorus.The results showed that with acetic and propionic acid as carbon source, the system’s storage capacity for substrate was larger, in which the maximum values of PHA, PHB and PHV was of the 6.0 mmolC·L^-1, 4.25 mmolC·L^-1 and 3.69 mmolC·L^-1(at acetic acid/propionic acid=2/1）,respectively.When methanol,ethanol, glucose,starch and domestic sewage were used as carbon source for substrate storage, the storaged substance was mainly PHB,but their capacity lower than that of acetic and propionic acid.The release of phosphorus increased with propionic acid content in combined acetic and propionic acid and reached the maximum 16.53 mg·L^-1 at propionic acid as sole carbon source.With starch and domestic sewage as a carbon source,the phosphorus release was small, 3.56 mg·L^-1 and 6.75 mg·L^-1, while methanol, ethanol and glucose as carbon source the activated sludge showed no significant phosphorus release features.

Key words:

强化生物除磷, 碳源, 底物贮存, PHA, 聚磷菌