Effect of artificial aeration on the performance of vertical-flow constructed wetland treating heavily polluted river water

Dong, Huiyu; Qiang, Zhimin; Li, Tinggang; Jin, Hui; Chen, Weidong

doi:10.1016/s1001-0742(11)60804-8

Cited by 140 publications

(45 citation statements)

References 34 publications

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“…3 and 4,* symbol). Many studies have claimed that the use of artificial aeration enhances the removal of many pollutants namely COD, NH 4 + -N and TN (e.g., Dong et al, 2012;Hu et al, 2012;Fan et al, 2013;Foladori et al, 2013;Zapater-Pereyra et al, 2014). However, some studies are conducted in HFCWs where the aeration effect probably plays a major role since oxygen transfer in HFCWs is lower than that in VFCWs (e.g., Fan et al, 2013;ZapaterPereyra et al, 2014).…”

Section: Aerationmentioning

confidence: 99%

“…However, some studies are conducted in HFCWs where the aeration effect probably plays a major role since oxygen transfer in HFCWs is lower than that in VFCWs (e.g., Fan et al, 2013;ZapaterPereyra et al, 2014). Others (e.g., Dong et al, 2012) mention the benefits of aeration (without supporting it with statistics) when the actual concentration differences (between aerated and non aerated) are not tremendously different.…”

Section: Aerationmentioning

confidence: 99%

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Evaluation of the performance and space requirement by three different hybrid constructed wetlands in a stack arrangement

Zapater-Pereyra

Ilyas

Lavrnić

et al. 2015

Ecological Engineering

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Section: Aerationmentioning

confidence: 99%

Section: Aerationmentioning

confidence: 99%

Evaluation of the performance and space requirement by three different hybrid constructed wetlands in a stack arrangement

Zapater-Pereyra

Ilyas

Lavrnić

et al. 2015

Ecological Engineering

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“…Artificial wetland technology as a biological treatment and restoration method has been widely studied in recent years [1][2][3][4] and has been used in water resource ecological wetland restoration projects. Zhejiang Province already has the similar project experiences on surface river water resource restoration.…”

Section: Ammonia Nitrogen Removal With Artificial Wetland Technologymentioning

confidence: 99%

The Process Selection and Design for the Second Phase Project of the Guanjinggang Water Plant

Jiang

Fan

et al. 2015

MATEC Web of Conferences

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The raw water of the Guanjinggang water plant comes from the Guanjinggang River, which is located to the south of the plant. The water source is polluted by organic substances and metals, NH 3 -N, COD Mn , total nitrogen, total phosphorus, dissolved oxygen, iron and manganese all exceed the acceptable limits of class III water according to the "Environment quality standards for surface water" (GB3838-2002). In particular, the seasonal high ammonia-nitrogen in winter is a major problem during the purification process. Figure 1 shows the flow chart of the first phase project layout of the Guanjinggang water plant.Each step of the treatment process aims to eliminate the targeted pollutants. First, the biological pretreatment aims to degrade the ammonia nitrogen then the intermediate high density sedimentation tank removes turbidity; subsequently, the biological activated carbon advanced treatment eliminates organics; finally, the sand filter ensures that the biosecurity and level of turbidity reach the standard. KEY ISSUESThe key issues during the process selection and design for the second phase project of the Guanjinggang water plant are the seasonal high ammonia-nitrogen, biosecurity, pH control of outlet water and energy saving. Seasonal high ammonia-nitrogenThe changes of the ammonia nitrogen in the raw water, pretreatment, precipitation, oxidation, carbon filter and sand filter effluent are shown in Figure At the early stages of the first phase project, the ammonia nitrogen concentration in the raw water is generally below 2mg/L , which means the whole process including comprehensive biological pretreatment-strengthening coagulation and sedimentation-biological activated carbon-advanced filtration with biological-physical-chemical synergism, can meet the standard of outlet water quality. However, after the second half of 2008, the raw water quality changed because the amount of COD Mn , ammonia nitrogen, total phosphorus, total nitrogen, iron and manganese rose significantly. In particular, the worsening of the pollution caused by ammonia nitrogen and the filler deposition in the biological pretreatment ABSTRACT: The Guanjingang water plant has a capacity of 300,000m 3 /d and is one of the main water plants of Jiaxing City in Zhejiang Province, which is located in the southern suburban area of this city. Its second phase with an augmentation of capacity of 150,000m 3 /d was put into operation in September, 2012. The raw water for this plant is the surface water that purified by the artificial wetlands and goes through the combined treatment of a biological preprocess, with both conventional and advanced process, to ensure the water quality meets the standard. This paper mainly focuses on the three key problems: the seasonal high ammonia-nitrogen, biological security and pH control of outlet water. And it aims to optimize and analyze the combined processes including the artificial wetlands, biological pretreatment, sand filtration and advanced treatment with ozone-activated carbon. Subsequently, the new treat...

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“…Because of its strong purification capacity, wetlands are favored by scientists and engineers, and constructed wetlands are used for purifying various kinds of sewage [1] [2] [3]. There are a large number of aerobic, anaerobic and facultative anaerobic microbial communities in wetland, which are widely distributed in the soil matrix and plant root surface of wetland system [4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Sewage Treatment on Microbial Community Structure of Surface Water in Xiantao Wetland

Song¹,

Yang²,

Ma³

et al. 2018

OALib

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Abstract[Objective] The aim of study is to research the treatment of urban sewage by the semi natural wetland method in the high connectivity water system of the surface water and surface water in the inland waterway.[Methods] Microbial diversity and community structure in the surface water of eight samples on the Xiantao artificial wetland were investigated by using the Illumina Miseq sequencing technique and the resulting microbial data were statistically analyzed in combination with environmental variabl.[Results] The results showed that COD concentration had a very significant positive correlation with total microbial communities (r = 0.700, P < 0.01), and TP,NH -N and TN were significantly positively correlated (r = 0.509, 0.517 and 0.508, P < 0.05). In addition, COD concentration was positively correlated with abundant groups (r = 0.488, P < 0.05), and TP, + 4 NH -N and TN were significantly positively correlated (r = 0.537, 0.356 and 0.360, P < 0.05). For rare groups, they may be more sensitive to the environment than their abundant groups.[Conclusion] For rare taxa, it is likely to be more sensitive to the environment than their rich taxa. The relative abundance of rare taxa of samples collected when buried deep 5 m is greater than that of surface water. Therefore, the environmental conditions of microbial responses (rare taxa) should be carefully evaluated in the future.

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Effect of artificial aeration on the performance of vertical-flow constructed wetland treating heavily polluted river water

Cited by 140 publications

References 34 publications

Evaluation of the performance and space requirement by three different hybrid constructed wetlands in a stack arrangement

Evaluation of the performance and space requirement by three different hybrid constructed wetlands in a stack arrangement

The Process Selection and Design for the Second Phase Project of the Guanjinggang Water Plant

Effects of Sewage Treatment on Microbial Community Structure of Surface Water in Xiantao Wetland

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