Enhanced nutrient removal in agro-industrial wastes-amended hybrid floating treatment wetlands treating real sewage: Laboratory microcosms to field-scale studies

被引：3

作者：

Kumwimba, Mathieu Nsenga ^{[1
,2
,3
]}

Huang, Jinlou ^{[1
,2
]}

Dzakpasu, Mawuli ^{[7
]}

Ajibade, Fidelis Odedishemi ^{[2
,4
,5
]}

Li, Xuyong ^{[1
,2
,10
]}

Sanganyado, Edmond ^{[8
]}

Guadie, Awoke ^{[9
]}

Senel, Engin

Muyembe, Diana Kavidia ^{[6
]}

机构：

[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Univ Lubumbashi, Fac Agron, Lubumbashi, DEM REP CONGO

[4] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Biotechnol, Beijing 100085, Peoples R China

[5] Fed Univ Technol Akure, Dept Civil & Environm Engn, PMB 704, Akure, Nigeria

[6] Chinese Acad Agr Sci, Inst Food Sci & Technol, Beijing, Peoples R China

[7] Xian Univ Architecture & Technol, Sch Environm & Municipal Engn, Xian 710055, Peoples R China

[8] Northumbria Univ, Dept Appl Sci, Newcastle Upon Tyne NE1 8ST, England

[9] Arba Minch Univ, Coll Nat Sci, Dept Biol, Arba Minch, Ethiopia

[10] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Shuangqing Rd 18, Beijing 100085, Peoples R China

来源：

CHEMOSPHERE | 2023年 / 330卷

基金：

中国博士后科学基金;

关键词：

Novel floating treatment wetlands; Natural agro-industrial materials; Nutrient; Microbial community; Upscale; WATER-TREATMENT; FLY-ASH; SLUDGE; BED; SUBSTRATE; NITROGEN; ANAMMOX;

D O I：

10.1016/j.chemosphere.2023.138703

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The use of natural agro-industrial materials as suspended fillers (SFs) in floating treatment wetlands (FTWs) to enhance nutrient removal performance has recently been gaining significant attention. However, the knowledge concerning the nutrient removal performance enhancement by different SFs (alone and in mixtures) and the major removal pathways is so far inadequate. The current research, for the first time, carried out a critical analysis using five different natural agro-industrial materials (biochar, zeolite, alum sludge, woodchip, flexible solid packing) as SFs in various FTWs of 20 L microcosm tanks, 450 L outdoor mesocosms, and a field-scale urban pond treating real wastewater over 180 d. The findings demonstrated that the incorporation of SFs in FTWs enhanced the removal performance of total nitrogen (TN) by 20-57% and total phosphorus (TP) by 23-63%. SFs further enhanced macrophyte growth and biomass production, leading to considerable increases in nutrient standing stocks. Although all the hybrid FTWs showed acceptable treatment performances, FTWs set up with mixtures of all five SFs significantly enhanced biofilm formation and enriched the abundances of the microbial community related to nitrification and denitrification processes, supporting the detected excellent N retention. N mass balance assessment demonstrated that nitrification-denitrification was the major N removal pathway in reinforced FTWs, and the high removal efficiency of TP was attributable to the incorporation of SFs into the FTWs. Nutrient removal efficiencies ranked in the following order among the various trials: microcosm scale (TN: 99.3% and TP: 98.4%) > mesocosm scale (TN: 84.0% and TP: 95.0%) > field scale (TN: -15.0-73.7% and TP: -31.5-77.1%). These findings demonstrate that hybrid FTWs could be easily scaled up for the removal of pol-lutants from eutrophic freshwater systems over the medium term in an environmentally-friendly way in regions with similar environmental conditions. Moreover, it demonstrates hybrid FTW as a novel way of disposing of significant quantities of wastes, showing a win-win means with a huge potential for large-scale application.

引用

页数：13