Treatment of farmer household tourism wastewater using iron-carbon micro-electrolysis and horizontal subsurface flow constructed wetlands: A full-scale study

Ma, Tao; Zhang, Lieyu; Xi, Beidou; Xiong, Ying; Yu, Pengfei; Li, Guowen; Li, Jiaxi; Zhao, Chen

doi:10.1016/j.ecoleng.2017.08.029

Cited by 17 publications

(9 citation statements)

References 84 publications

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“…Iron-carbon micro-electrolysis has the advantages of a wide application range, low cost of processing, short processing time, convenient operation and maintenance, low power consumption, etc. [16,17].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a New Iron-Carbon-Loaded Constructed Wetland Substrate and Enhanced Phosphorus Removal Performance

2020

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Iron-carbon substrates have attracted extensive attention in water treatment due to their excellent processing ability. The traditional iron-carbon substrate suffers from poor removal effects, separation of the cathode and anode, hardening, secondary pollution, etc. In this study, a new type of iron-carbon-loaded substrate (NICLS) was developed to solve the problems of traditional micro-electrolytic substrates. Through experimental research, a preparation method for the NICLS with Fe and C as the core, zeolite as the skeleton, and water-based polyurethane as the binder was proposed. The performance of the NICLS in phosphorus-containing wastewater was analyzed. The results are as follows: The optimal synthesis conditions of the NICLS are 1 g hydroxycellulose, wood activated carbon as the cathode, an activated carbon particle size of 200-60 mesh, and an Fe/C ratio of 1:1. Acidic conditions can promote the degradation of phosphorus by the NICLS. Through the characterization of the NICLS (scanning electron microscope (SEM), X-ray diffractometer (XRD), and energy-dispersive spectrometer (EDS), etc.), it is concluded that the mechanism of the NICLS phosphorus removal is a chemical reaction produced by micro-electrolysis. Using the NICLS to treat phosphorus-containing wastewater has the advantages of high efficiency and durability. Therefore, it can be considered that the NICLS is a promising material to remove phosphorus.

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Section: Introductionmentioning

confidence: 99%

Preparation of a New Iron-Carbon-Loaded Constructed Wetland Substrate and Enhanced Phosphorus Removal Performance

2020

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“…The removal of nitrogen in the CWs is a complex process that involves volatilization, adsorption, plant uptake and biological activities (Ma et al 2018a). To investigate nitrogen removal in CWs, the removal efficiencies of

{NH}_{4}^{+}

–N, NO 3 ‐ –N and TN were monitored.…”

Section: Resultsmentioning

confidence: 99%

Investigating the influence of iron–carbon microelectrolysis on the performance and microbial community of constructed wetlands

Fang

Zhou

et al. 2019

Water & Environment J

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Iron-carbon microelectrolysis (Fe-C-ME) has been used extensively for the treatment of domestic sewage. In this study, CWs incorporated with Fe-C-ME were established, and the performance and microbial community structure of CWs were investigated. The results indicated that CWs incorporated with Fe-C-ME had better performance for treating domestic sewage. The NO 3-N, TN and TP removal efficiencies of CWs incorporated with Fe-C-ME were 82.3, 80.3 and 98.2%, respectively, which were 7.8, 4.7 and 25.2% higher than those of the CWs without Fe-C-ME. High-throughput sequencing analysis demonstrated that Fe-C-ME changed the microbial community structure. For example, some dominant groups at the class level, such as Betaproteobacteria (15.2%), Gammaproteobacteria (10.6%) and Deltaproteobacteria(10.0%), were promoted by Fe-C-ME. The results demonstrated that the relative abundance of bacteria involved in nitrification, denitrification, polyphosphate accumulation or COD reduction at the genus level thrived because of the presence of Fe-C-ME, which can improve the performance of CWs.

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“…In previous studies, a conclusion was found that the application of ferric-carbon micro-electrolysis SSFCW (Fe/C-M/E SSFCW) enhanced the removal performance in simulated domestic sewage water treatment, especially in the process of denitrification and phosphorus removal. Significant nitrogen and phosphorus removal performance was also achieved, which were indicated by several studies [9,[12][13][14]. The mechanism of these promoting effects was the supply of electrons by the galvanic corrosion of numerous micro-scale sacrificial anode in denitrification, and the combination of PO 4 3− with Fe 2+ or Fe 3+ to remove phosphorus [15].…”

Section: Introductionmentioning

confidence: 88%

The Improvement of Pollutant Removal in the Ferric-Carbon Micro-Electrolysis Constructed Wetland by Partial Aeration

Dong

Zhuang

et al. 2020

Water

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Subsurface flow constructed wetland (SSFCW) has been applied for wastewater treatment for several decades. In recent years, the combination of ferric-carbon micro-electrolysis (Fe/C-M/E) and SSFCW was proven to be an effective method of multifarious sewage treatment. However, Ferric substrate created a relatively reductive condition, decreased the oxidation efficiency of NH4+-N, and blocked the following denitrification process, which led to the low removal efficiencies of NH4+-N and total nitrogen (TN). In this study, partial aeration was introduced into the ferric-carbon micro-electrolysis SSFCW (Fe/C-M/E CW) system to solve the problem above. The water quality and nitrogen-related functional genes of bacteria on the surface of substrate were measured for mechanism exploration. The results showed that, the removal efficiencies of NH4+-N and total phosphorus (TP) in an aerated Fe/C-M/E CW system were 96.97% ± 6.06% and 84.62% ± 8.47%, much higher than 43.33% ± 11.27% and 60.16% ± 2.95% in the unaerated Fe/C-M/E CW systems. However, the TN removal in Fe/C-M/E CW system was not enhanced by aeration, which could be optimized by extending more anoxic section for denitrification.

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Treatment of farmer household tourism wastewater using iron-carbon micro-electrolysis and horizontal subsurface flow constructed wetlands: A full-scale study

Cited by 17 publications

References 84 publications

Preparation of a New Iron-Carbon-Loaded Constructed Wetland Substrate and Enhanced Phosphorus Removal Performance

Preparation of a New Iron-Carbon-Loaded Constructed Wetland Substrate and Enhanced Phosphorus Removal Performance

Investigating the influence of iron–carbon microelectrolysis on the performance and microbial community of constructed wetlands

The Improvement of Pollutant Removal in the Ferric-Carbon Micro-Electrolysis Constructed Wetland by Partial Aeration

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