鞘藻对沼液中磷的去除机理分析

王海萍; 刘锋; 郑立国; 吴金水; 陈向

doi:10.13205/j.hjgc.202109006

鞘藻对沼液中磷的去除机理分析

doi: 10.13205/j.hjgc.202109006

王海萍^1,2,
刘锋^2, ,,
郑立国¹,
吴金水²,
陈向²

1. 长沙环境保护职业技术学院, 长沙 410004;
2. 中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室, 长沙 410125

基金项目:

湖南省教育厅科研项目（19C0026）；湖南省自然科学基金（2017JJ5061）；国家自然科学基金（41907333）。

详细信息

作者简介:
王海萍(1983-),女,副教授,主要研究方向为农业面源污染生态修复技术与理论研究。2450485691@qq.com

通讯作者:
刘锋(1978-),男,研究员,主要研究方向为农业面源污染生态修复技术与理论研究。liufeng@isa.ac.cn

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出版历程
- 收稿日期: 2021-01-21
- 网络出版日期: 2022-01-21

MECHANISM OF PHOSPHORUS REMOVAL FROM BIOGAS SLURRY BY OEDOGONIUM SP.

1. Changsha Environmental Protection College, Changsha 410004, China;
2. Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China

摘要

摘要: 利用微藻对沼液进行二级处理是一类绿色经济的废水处理方式，具有可观的应用前景。研究测定了鞘藻在处理沼液过程中藻的生长速度、DO和pH变化，并通过同位素示踪法分析了沼液中磷素的去除速率及其途径。结果表明：鞘藻在沼液中Chl-a浓度达到3.35 mg/L，是初始浓度的3.13倍，TP去除率为91.22%。TP去除机理分析表明：沼液中残留的微生物对TP的去除影响小；沼液处于好氧状态，很难形成气态PH₃进入大气；碱性条件下，且存在Ca²⁺、Mg²⁺等阳离子的协同作用，约30%的TP通过磷酸盐沉淀去除，约60%的TP通过鞘藻同化去除。综合来看，TP浓度的降低主要是通过鞘藻的生长吸收和磷酸盐沉淀所致，要进一步提高TP的去除率，应降低DO值并保持适宜的N/P。
- 藻类培养 /
- 鞘藻 /
- 同位素示踪法 /
- 沼液 /
- 通径分析
Abstract: It is a kind of green economy wastewater treatment method to use the optimized microalgae for secondary treatment of swine wastewater, which has considerable application prospect. Combining isotope tracer method and path analysis, the phosphorus metabolic and mechanism analysis in biogas slurry by Oedogonium sp. were studied, in order to provide theoretical basis for practical application of Oedogonium sp. in digested wastewater treatment. During the experiment, Chl-a content in the biogas slurry reached 3.35 mg/L, 3.13 times of the initial content, and the TP removal rate was 91.22%. The analysis of TP removal mechanism showed that the microbial residues in the wastewater had little influence on TP removal. It was difficult to form gaseous phosphine from biogas slurry into the atmosphere under aerobic state. About 30% of TP was removed by phosphate precipitation under alkaline condition with the synergistic effect of cation such as Ca²⁺ and Mg²⁺. TP decrease was mainly caused by the algal incorporation and phosphate precipitation. About 60% of TP was removed by microalgae assimilation. The DO value should be reduced and the N/P ratio should be maintained for further improving TP removal rate.
- algal culture /
- Oedogonium sp. /
- isotope tracer /
- biogas slurry /
- path analysis

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