Assessment of the treatment of domestic sewage by a vertical-flow artificial wetland at different operating water levels

Lu, Shilei; Gao, Xuerui; Wu, Pute; Li, Wei; Bai, Xiao; Sun, Miao; Wang, Ai

doi:10.1016/j.jclepro.2018.10.111

Cited by 30 publications

(13 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Generally, the formation of knowledge application appears in the form of the decision table [33]. To explain the application method based on the knowledge theory of the rough set, a method for processing the information of the decision table is proposed, and the main steps of the method are as follows:…”

Section: Application Steps Based On the Knowledge Theory Of The Rough Setmentioning

confidence: 99%

Assessment of Rough Set Theory in Relation to Risks Regarding Hydraulic Engineering Investment Decisions

Bai

et al. 2020

Mathematics

Self Cite

View full text Add to dashboard Cite

Rough set theory is a mathematics tool specifying imperfection and uncertainty. Based on the knowledge theory of the rough set, the numerical values of some features or attributes are not required. Through data reduction, this article analyzes the investment decision of hydraulic engineering and obtains the following by reduction: i. when the construction expense of the hydraulic engineering is low, but the financial income is high, the investment in the construction project can be selected; ii. when the expense of the hydraulic construction project is low and the external influence is common or the financial expense is common, if the external influence is low or the financial income is high, the investment can be delayed; iii. when the construction strategic benefit of the hydraulic engineering is low, the decision rule of no investment can be selected. The novel findings discovered by this article have provided scientific information regarding investment decisions of hydraulic engineering.

show abstract

Section: Application Steps Based On the Knowledge Theory Of The Rough Setmentioning

confidence: 99%

Assessment of Rough Set Theory in Relation to Risks Regarding Hydraulic Engineering Investment Decisions

Bai

et al. 2020

Mathematics

Self Cite

View full text Add to dashboard Cite

show abstract

“…The pollution of rural domestic sewage has become more and more concerned around the world over the past decade (Zhang et al, 1996;Lutterbeck et al, 2018), especially in developing countries where increasing demand for governance (Sunny et al, 2006;Mohammad et al, 2008). The pollution of rural domestic sewage in China is more complicated due to factors such as its large population base and uneven economic development (Wang et al, 2019;Hong et al, 2019). The large rural population in China results in a huge amount of domestic sewage, and a correspondingly large market.…”

Section: Introductionmentioning

confidence: 99%

“…However, these technologies have problems such as unstable processing effect, high energy consumption (Xu et al, 2019), large land occupation, high investment, di cult technical management (Cui et al, 2016), and poor compatibility with ecological landscapes, making the applicability and popularization of these technologies are limited. It is urgent to nd a new technology with stable processing effect, economically affordable for investment and operating, simple management and coordination with the surrounding landscape (Cameron et al, 2003;Wu et al, 2013;Lu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Study on the application and optimization of domestic sewage treatment demonstration based on a novel biofilter-constructed wetland coupling system

Wang¹,

Liu

Zeng

et al. 2022

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

A novel bio lter-constructed wetland coupling system has been applied more than 160 domestic sewage treatment projects in different cities of Zhejiang province, China. The performance of a randomly selected project ( ux rate was 27.0 m 3 /d) based on the coupling system was evaluated in long-term, and the e uent monitoring by big data analysis showed a relatively stable and good water quality. The e uent concentrations of COD Cr , NH 4 + -N and TP was 37.57 ± 11.17 mg/L, 5.64 ± 1.69 mg/L and 0.82 ± 0.16 mg/L, respectively, which met the rst class of "Standards for Discharge of Water Pollutants from Rural Domestic Sewage Treatment Facilities" (DB33/973-2015). The concentrations of e uent TP showed a strong polynomial curve tting with e uent NH 4 + -N concentrations (R 2 = 0.9329) according to the big data analysis. Besides, the concentrations of e uent COD Cr had a strong positive linear correlation with the concentrations of e uent NH 4 + -N (R 2 = 0.9297), which increased with the increase of e uent TP concentrations (R 2 = 0.6957). Results also showed C/N had stronger correlation with pH (R 2 = 0.6441), while the concentration of e uent NH 4 + -N and e uent TP had weak correlation with pH (R 2 = 0.3348 and R 2 = 0.4834, respectively). The ndings might have very important guiding signi cance for the future monitoring methods of water e uent quality of treatment facility and the cost reduction of monitoring management. Moreover, a demonstration and experiments were carried out for a contrast study of the enhanced system (b) and original system (a). The removal e ciency of COD Cr , NH 4 + -N and TP of the enhanced system (b) was 81.33 %, 90.22 %, and 75.44 %, respectively, which increased by 4.33 %, 9.11 % and 13.77 % respectively compared to the original system (a).

show abstract

“…As a large number of wetlands have been reclaimed and are gradually being surrounded by farmland, the agricultural drainage is discharged into the wetlands, which increases the difficulty of fully removing the total nitrogen (TN) [1,2]. Research on the spatial relationship of ammonia nitrogen (NH 4 -N), nitrate nitrogen (NO 3 -N), and TN is important for studying the spatial patterns of the wetlands' TN removal ability when receiving agricultural drainage [3][4][5]. Because the distances from the water inlet are different, the interior and edge areas also differ.…”

Section: Introductionmentioning

confidence: 99%

Spatial Pattern of Dissolved Nitrogen in the Water on Receiving Agricultural Drainage in the Sanhuanpao Wetland in China

Wang

Lijuan

Song

et al. 2021

Water

View full text Add to dashboard Cite

The total nitrogen (TN) increases and the water quality deteriorates when a large amount of nitrogen-containing water is discharged from farmlands into wetlands. This research on the relationship between the TN, ammonia nitrogen (NH4-N), and nitrate nitrogen (NO3-N) concentrations in water has a certain reference significance for understanding the spatial pattern of nitrogen removal in wetlands. Taking the Sanhuanpao wetland in northeast China as the research object, 24 sampling plots in the study area were sampled in the spring and summer of 2017 to test the concentrations of TN, NH4-N, and NO3-N. Based on the calculations of the change rates of the TN, NH4-N, and NO3-N in spring and summer, a step-by-step elimination analysis was carried out and the spatial pattern of the TN, NH4-N, and NO3-N removals were revealed by gradual buffer extrapolations, combined with stepwise fitting functions. The results show that the removal capacity of NH4-N is strong within the range of 14.55 km–20 km and 26.93 km–35.96 km from the wetland inlet, and the removal capacity of NO3-N is relatively strong within the range of 26.93 km–35.96 km. The strong NH4-N and NO3-N removal areas in the wetland are not in the geometric center of the wetland, but in separate narrow areas around the center. The TN removal along water channel direction is only 0.25 times higher than that direction perpendicular to the channel, indicating that regardless of whether wetlands are expanded along the water channel or perpendicular to the water channel, the difference to the TN removal is small. Effectively monitoring and managing the reception of agricultural drainage is extremely important for maintaining the water-purification function of wetlands. The aim of the research is to reveal a spatial law of nitrogen removal in wetland water, and provide a framework for studying the mechanism of spatial difference of nitrogen.

show abstract

Assessment of the treatment of domestic sewage by a vertical-flow artificial wetland at different operating water levels

Cited by 30 publications

References 29 publications

Assessment of Rough Set Theory in Relation to Risks Regarding Hydraulic Engineering Investment Decisions

Assessment of Rough Set Theory in Relation to Risks Regarding Hydraulic Engineering Investment Decisions

Study on the application and optimization of domestic sewage treatment demonstration based on a novel biofilter-constructed wetland coupling system

Spatial Pattern of Dissolved Nitrogen in the Water on Receiving Agricultural Drainage in the Sanhuanpao Wetland in China

Contact Info

Product

Resources

About