Dephosphorization mechanism of prolonged sludge age SBBR treating saline and high-phosphorus wastewater

作者：Long Teng rui^*; Chen Yao; Zhou Jian

来源：Journal of Central South University of Technology, 2009, 16: 363-367.

DOI：10.1007/s11771-009-0238-5

• sludge age
• dephosphorization mechanism
• phosphorus balance
• phosphate reduction

Prolonged sludge age sequencing batch biofilm reactor (SBBR) without sludge discharge appears high performance phosphorus removal in treating saline and high-phosphorus wastewater, which cannot be explained by traditional biological dephosphorization theory. The new path and mechanism of phosphorus removal was discussed on the phosphorus balance of phosphorus removal system without sludge discharge. Phosphorus balance in sludge was studied on 26 running cycles of the phosphorus reduction system. The results show that there is only 0.12 mg/g poly-P in sludge at the end of each reaction period, not phosphorus uptake by polyphosphate-accumulating organisms (PAOs). It is found that 41.8 mg/L, of external phosphorus acts lost per day averagely, and 155 mg of internal phosphorus in sludge acts lost. The matrix bound phosphine in sludge achieves 36.04 mg/kg measured by alkaline digestion, and there is 18.44 ma/kg in +1 valence state, a intermediate, in sludge. This implies that the phosphorus removal system of prolonged sludge age SBBR without sludge discharge is a phosphate reduction, and the path of dephosphorization is phosphate hypophosphite phosphine.

• 出版日期2009-12
• 单位重庆大学