Improving removal performance of pollutants by artificial aeration and flow rectification in free water surface constructed wetland

Chyan, Jih Ming; Lin, Chien Jung; Lin, Yu Chi; Chou, Yi An

doi:10.1016/j.ibiod.2016.04.034

Cited by 31 publications

(6 citation statements)

References 36 publications

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“…Improving the removal efficiency of CWs by adjusting the operational parameters has become a hot research topic. Chyan et al (2016) reported improving removal performance of pollutants in a free water surface CWs by optimizing artificial aeration and rectifying flow.…”

Section: Engineered Wetlands and Natural Systemsmentioning

confidence: 99%

Emerging Pollutants – Part II: Treatment

Liu¹,

Zhang²,

Chang³

2017

Water Environment Research

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Emerging contaminants are considered as some substances of actual or potential threat to human health or environment, which include pharmaceutical, personal care products, endocrine disruptors, nanoparticles, antibiotic resistance genes and chemicals used in packaging products, etc. How to treat these emerging pollutants in water bodies with green, high efficiency and low-cost has become the focus of attention. The purpose of this review is to summarize published researches on emerging pollutants treatment in 2017.

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Section: Engineered Wetlands and Natural Systemsmentioning

confidence: 99%

Emerging Pollutants – Part II: Treatment

Liu¹,

Zhang²,

Chang³

2017

Water Environment Research

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“…Nevertheless, their nutrient removal performance, mainly that of nitrogen, has been poor [11]. Some researches [12,13] report ammonia nitrogen and total nitrogen removal efficiencies of 35% and 53%, respectively, for domestic water, because of the lack of sufficient dissolved oxygen. Similar performances have been showed for wastewater released from livestock using CWs as depuration system [14].…”

Section: Introductionmentioning

confidence: 99%

“…These removal efficiencies can be increased by artificial forced aeration systems in CWs [15]. Nevertheless, it has been recently shown that total nitrogen removal efficiency in CWs drops under conditions of excessive dissolved oxygen, because it might restrain the denitrification process [12,16]. For this reason, in this work, a hybrid constructed wetland with an internal recirculation system connecting the output of the vertical flow constructed wetland to the input of the hydrolytic up-flow sludge bed digesters has been developed and studied as an alternative to the forced aeration system, with the aim of improving nitrogen removal.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Constructed Wetland to Improve Organic Matter and Nutrient Removal

Fernández-Fernández

Vega

Jaramillo-Morán

et al. 2020

Water

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Constructed wetlands are one of the best technologies for wastewater treatment in small towns, small businesses or farms and/or livestock breeding. In this work, a wastewater depuration ecological system implemented in a hybrid constructed wetland to remove nutrients and organic matter from small urban agglomerations is studied. It comprises two processing stages: a primary treatment carried out in two hydrolytic up-flow sludge bed digesters working in parallel and a secondary one made up of two vertical flow constructed wetlands, which are alternatively used, followed by a horizontal flow constructed wetland. An internal recirculation system connects the output of the vertical flow constructed wetlands to the input of the hydrolytic up-flow sludge bed digesters with the aim of promoting the nitrification-denitrification process. High nutrients and organic matter removal efficiencies were observed when treating highly polluted wastewater from an animal farm. Therefore, this ecological depuration system, designed with an internal recirculation to enhance nitrogen reduction, may be considered an efficient alternative to treat wastewater from small urban agglomerations and diffuse contamination from agricultural industries and livestock farms polluting surface waters with nitrates, which may cause serious environmental problems, such as eutrophication.

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“…However, the pollutant removal (Nishikawa et al, 2013). Chyan et al (2016) reported that an effective increase in the ammonium nitrogen removal from 32.9-54.8% to 78.2-78.6% was achieved in aerated SFCWs. Even though artificial aeration is the most effective method of ensuring a sufficient oxygen supply, the corresponding operational cost greatly limits its popularity (Zhang et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

A novel aerated surface flow constructed wetland using exhaust gas from biological wastewater treatment: Performance and mechanisms

Zhang¹,

Hu²,

Zhang³

et al. 2018

Bioresource Technology

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In this study, a novel aerated surface flow constructed wetland (SFCW) using exhaust gas from biological wastewater treatment was investigated. Compared with un-aerated SFCW, the introduction of exhaust gas into SFCW significantly improved NH-N, TN and COD removal efficiencies by 68.30 ± 2.06%, 24.92 ± 1.13% and 73.92 ± 2.36%, respectively. The pollutants removal mechanism was related to the microbial abundance and the highest microbial abundance was observed in the SFCW with exhaust gas because of the introduction of exhaust gas from sequencing batch reactor (SBR), and thereby optimizing nitrogen transformation processes. Moreover, SFCW would significantly mitigate the risk of exhaust gas pollution. SFCW removed 20.00 ± 1.23%, 34.78 ± 1.39%, and 59.50 ± 2.33% of HS, NH and NO in the exhaust gas, respectively. And 31.32 ± 2.23% and 32.02 ± 2.86% of bacterial and fungal aerosols in exhaust gas were also removed through passing SFCW, respectively.

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Improving removal performance of pollutants by artificial aeration and flow rectification in free water surface constructed wetland

Cited by 31 publications

References 36 publications

Emerging Pollutants – Part II: Treatment

Emerging Pollutants – Part II: Treatment

Hybrid Constructed Wetland to Improve Organic Matter and Nutrient Removal

A novel aerated surface flow constructed wetland using exhaust gas from biological wastewater treatment: Performance and mechanisms

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