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Journal of Zhejiang University (Science Edition)  2023, Vol. 50 Issue (5): 588-596    DOI: 10.3785/j.issn.1008-9497.2023.05.010
Environmental Science     
Purification effect of ex-situ ecological combined remediation system on different forms of phosphorus in tributaries of Jiulong River
Xiaoyu HAN1,2,Hongda FANG1(),Jianjie LI2,Binger LUO2,Jiahui LIN2,Xin WANG2,Wanxin LIU3,Junming HE2,Jiayu ZHAI2,Weibin LAN3,Peiyong GUO2
1.College of Harbour and Coastal Engineering,Jimei University,Xiamen 361021,Fujian Province,China
2.Department of Environmental Science and Engineering,College of Chemical Engineering,Huaqiao University,Xiamen 361021,Fujian Province,China
3.ZKTH Environmental Technology Co. Ltd. ,Xiamen 361021,Fujian Province,China
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Abstract  

This paper discusses the effect of ex-situ ecological combined remediation (ESECR) system on the purification of phosphorus of different forms in the polluted water of Pulin Creek, a tributary of Jiulong River, and each unit of ESECR treatment system is analyzed on the correlation between different phosphorus forms and environmental factors. Results showed that the average total removal rate of TP, DTP, DP and PP of ESECR treatment system were 84.3%, 84.4%, 90.8% and 78.9% respectively, among them the DP purification effect was the best. In each unit of ESECR treatment system, when the phosphorus content in the raw water was low, the sludge-membrane symbiotic (SSM) high efficiency coagulation water purification system had good TP, DTP and DP purification effect, the average removal rate were 81.4%, 76.0% and 84.8% respectively, the average removal rate of PP was 66.7%; when the content of phosphorus in the raw water was high, the average removal rate of TP, DTP and DP of the SSM high efficiency coagulation water purification system were 37.8%, 44.6% and 45.8%, nevertheless, the purification effect of PP was significant, and the average removal rate was 93.2%. When the processed water of the SSM high efficiency coagulation water purification system with low phosphorus content, the purification effect of ecological pond Ⅱ on TP and DTP was better than that of ecological pond Ⅰ, but the results on DP was opposite. For PP, the purification effect in ecological pond Ⅱ was better than that in ecological pond Ⅰ regardless of the impact of phosphorus content. The purification effect of ecological pond Ⅲ fluctuated, the purification effect on DP is relatively significant, and the average removal rate was 94.1%. In addition to the SSM high efficiency coagulation water purification system, the form of phosphorus in the polluted water of Pulin Creek and purified water by ESECR technology was mainly PP, and the percentage of each form in total phosphorus appeared as PP>DTP>DP. Pearson correlation analysis showed that different phosphorus forms were correlated with pH, water temperature and dissolved oxygen (DO) in ESECR treatment system.



Key wordsex-situ ecological combined remediation system      phosphorus      total phosphorus      purification effect      environmental factors     
Received: 19 September 2022      Published: 16 September 2023
CLC:  X 522  
Corresponding Authors: Hongda FANG     E-mail: hongdafang@126.com
Cite this article:

Xiaoyu HAN,Hongda FANG,Jianjie LI,Binger LUO,Jiahui LIN,Xin WANG,Wanxin LIU,Junming HE,Jiayu ZHAI,Weibin LAN,Peiyong GUO. Purification effect of ex-situ ecological combined remediation system on different forms of phosphorus in tributaries of Jiulong River. Journal of Zhejiang University (Science Edition), 2023, 50(5): 588-596.

URL:

https://www.zjujournals.com/sci/EN/Y2023/V50/I5/588


异位生态组合修复系统对九龙江支流水体不同形态磷的净化效果

采用异位生态组合修复系统研究九龙江支流浦林溪污染水体不同形态磷净化效果及其对磷形态百分比的影响,并分析了异位生态组合修复系统各处理单元水体磷形态与环境因子的相关性。结果表明,异位生态组合修复系统对总磷(TP)、溶解态总磷(DTP)、可溶性正磷酸盐(DP)和颗粒态磷(PP)的平均总去除率分别为84.3%、84.4%、90.8%和78.9%,其中对DP净化效果最好。在异位生态组合修复系统各处理单元中,当原水水体中磷浓度较低时,泥膜共生高效混凝净水系统对TP、DTP和DP的净化效果良好,平均去除率分别可达81.4%、76.0%、84.8%,对PP的平均去除率可达66.7%;当原水水体中磷浓度较高时,泥膜共生高效混凝净水系统对TP、DTP和DP的平均去除率分别为37.8%、44.6%和45.8%,对PP的净化效果显著,平均去除率可达93.2%。当泥膜共生高效混凝净水系统出水水体磷浓度较低时,对TP和DTP的净化效果均表现为生态塘Ⅱ>生态塘Ⅰ,而对DP对TP、DTP的净化效果表现为生态塘Ⅰ>生态塘Ⅱ。对PP的净化效果均表现为生态塘Ⅱ>生态塘Ⅰ。生态塘Ⅲ对TP、DTP的净化效果存在波动,对DP的净化效果较为显著,平均去除率可达94.1%,对PP的净化效果一般。除泥膜共生高效混凝净水系统出水外,浦林溪污染水体和经异位生态组合修复系统处理的水体磷形态均以PP为主,不同形态磷占总磷百分比依次为PP>DTP>DP。Pearson相关性分析显示,异位生态组合修复系统不同处理单元水体各形态磷与pH、水温和溶解氧之间表现出不同的相关性。


关键词: 异位生态组合修复系统,  磷素,  总磷,  净化效果,  环境因子 
Fig.1 Process flow diagram of ex-situ ecological combined remediation system
Fig.2 Total phosphorus content in different units of ex-situ ecological combined remediation system
Fig.3 Removal rate of total phosphorus by ex-situ ecological combined remediation system
Fig.4 Dissolved total phosphorus content in different units of ex-situ ecological combined remediation system
Fig.5 Removal rate of dissolve total phosphorus by ex-situ ecological combined remediation system
Fig.6 Dissolved orthophosphate content in different units of ex-situ ecological combined remediation system
Fig.7 Removal rate of dissolve orthophosphate by ex-situ ecological combined remediation system
Fig.8 Particulate phosphorus content in different units of ex-situ ecological combined remediation system
Fig.9 Removal rate of Particulate phosphorus by ex-situ ecological combined remediation system
Fig.10 The percentage of TP of three kinds of phosphorus in ex-situ ecological combination remediation system
处理单元指标溶解氧水温pH
泥膜共生系统TP-0.2460.556**-0.518*
DTP-0.2720.363-0.651**
DP-0.2560.344*-0.641**
PP-0.562**0.383-0.736**
生态塘ⅠTP0.2270.019-0.558**
DTP0.257-0.065-0.516*
DP0.272-0.036-0.456*
PP0.1180.2850.178
生态塘ⅡTP-0.118-0.3600.601**
DTP0.094-0.1190.436*
DP0.028-0.0470.027
PP-0.454*-0.6870.730**
生态塘ⅢTP-0.080-0.026-0.539**
DTP0.436*0.0450.057
DP0.376-0.0610.072
PP-0.396-0.063-0.732*
Table 1 Correlation between different forms of phosphorus and environmental factors in water by ex-situ ecological combination remediation system
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