Remediation of algal cells, PO43-, and NO3- from eutrophic wastewater using Echinodorus cordifolius in zigzag-horizontal subsurface constructed wetlands

被引：8

作者：

Boonbangkeng, Danuphon ^{[1
]}

Treesubsuntorn, Chairat ^{[1
]}

Dolphen, Rujira ^{[2
]}

Thiravetyan, Paitip ^{[1
]}

机构：

[1] King Mongkuts Univ Technol Thonburi, Sch Bioresources & Technol, Bangkok 10150, Thailand

[2] King Mongkuts Univ Technol Thonburi, Pilot Plant Dev & Training Inst, Bangkok 10150, Thailand

来源：

JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2021年 / 300卷 / 300期

关键词：

Zigzag baffle; Effluent recirculation; Algal cell removal; Echinodorus cordifolius; Constructed wetland; NITROGEN REMOVAL; EFFLUENT RECIRCULATION; TREATMENT EFFICIENCY; HYDRAULIC BEHAVIOR; PHOSPHORUS REMOVAL; PERFORMANCE; L; GROWTH; GLYCOL; PHYTOREMEDIATION;

D O I：

10.1016/j.jenvman.2021.113720

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The pollutant removal efficiency of traditionally constructed wetlands (CWs) is often limited due to low interaction time between wastewater and the CW matrix (plants, microbes, and substrates). A zigzag-horizontal subsurface flow constructed wetland with effluent recirculation (Z-HSSF + ER) was developed to improve removal efficiency. Echinodorus cordifolius plants were used in this study. The efficiency of the systems was evaluated using eutrophic wastewater. The results showed that the developed systems exhibited the high removal efficiency of algal cells, PO43-, and NO3- (97%, 70%, and 100%, respectively), within 5 days. Algal cells were removed by the interception mechanism of gravel and zigzag baffles. PO43- and NO3- in the eutrophic wastewater was mainly removed by E. cordifolius including rhizobacteria and other microorganisms. The long flow pathway created by the installation of zigzag baffles combined with effluent recirculation provides high dissolved oxygen (DO) in the systems and increases the interaction time between wastewater and the CW matrix, thus improving the pollutant removal efficiency of CWs.

引用

页数：9