Abstract:

Enhanced biological phosphorus removal(EBPR) system has excellent phosphorus removal performance and has been widely used in wastewater treatment. Zn²⁺ is a widespread metal ion in water bodies, however, the effect of Zn²⁺ on the phosphorus removal capacity of EBPR system is unclear. Therefore, the EBPR system was developed and the effect of Zn²⁺ on phosphorus removal performance of EBPR system was studied. Results showed that the inhibition rate of phosphorus removal ranged from 2.06% to 98.05% under the mass concentration range of 3-100 mg/L Zn²⁺. The effects of Zn²⁺ on metabolic intermediates and the activity of key enzymes were further investigated. Results revealed that the normally metabolic of polyhydroxyalkanoates and glycogen were inhibited at high Zn²⁺ concentration (≥ 10 mg/L)(p < 0.05), the activity of key enzymes was also inhibited(p < 0.05).

Key words: enhanced biological phosphorus removal, Zn²⁺, phosphorus removal capacity

摘要：

强化生物除磷（EBPR）系统具有优良的除磷性能且在水处理领域应用较广。Zn²⁺是水体中广泛存在的金属离子，其对EBPR系统除磷性能的影响及其机制尚不清楚。为此，构建EBPR系统研究了Zn²⁺对该系统除磷性能的影响。研究发现，3~100 mg/L的Zn²⁺对EBPR系统除磷抑制率为2.06%~98.05%。进一步研究Zn²⁺对代谢中间产物及关键酶活性的影响，发现较高浓度Zn²⁺（≥10 mg/L）可抑制聚磷微生物体内聚羟基烷酸酯与糖原的正常代谢（p < 0.05），除磷关键酶活性也受到抑制（p < 0.05）。

关键词: 强化生物除磷, Zn²⁺, 除磷性能

CLC Number: 

• X703