Nitrogen and phosphorus transformations and balance in a pond-ditch circulation system for rural polluted water treatment

Ma, Lin; He, Feng; Huang, Tao; Zhou, Qiaohong; Zhang, Yi; Wu, Zhenbin

doi:10.1016/j.ecoleng.2016.05.051

Cited by 32 publications

(11 citation statements)

References 132 publications

(106 reference statements)

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“…In the conventional bioretention cell, the media layers are almost aerobic due to the high content of sand. NH 4 + can also be removed by adsorption through soil layers [50,98] and nitrogen removal by denitrification accounts for 79.5% of total nitrogen removed [106]. A portion of nitrate removal can be achieved by the sorption process through bioretention soil media [107].…”

Section: Design Features That Enhanced Nitrogen Removalmentioning

confidence: 99%

A Review of Nitrogen Removal for Urban Stormwater Runoff in Bioretention System

et al. 2019

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One of the best management practices (BMPs) for stormwater quality and quantity control is a bioretention system. The removal efficiency of different pollutants under this system is generally satisfactory, except for nitrogen which is deficient in certain bioretention systems. Nitrogen has a complex biogeochemical cycle, and thus the removal processes of nitrogen are typically slower than other pollutants. This study summarizes recent studies that have focused on nitrogen removal for urban stormwater runoff and discusses the latest advances in bioretention systems. The performance, influencing factors, and design enhancements are comprehensively reviewed in this paper. The review of current literature reveals that a bioretention system shows great promise due to its ability to remove nitrogen from stormwater runoff. Combining nitrification and denitrification zones with the addition of a carbon source and selecting different plant species promote nitrogen removal. Nevertheless, more studies on nitrogen transformations in a bioretention system and the relationships between different design factors need to be undertaken.

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Section: Design Features That Enhanced Nitrogen Removalmentioning

confidence: 99%

A Review of Nitrogen Removal for Urban Stormwater Runoff in Bioretention System

et al. 2019

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“…Specific separation of PCR amplification products was performed by DGGE, as previously described [ 24 ]. Briefly, PCR-amplified samples were subjected to 7-h electrophoresis at 150 V through a 40% polyacrylamide gel at 60 °C, and then were subjected to electrophoresis again through 40% to 60% denaturing gradient gel.…”

Section: Methodsmentioning

confidence: 99%

“…The primers were: forward, 5 -CGC CCG GGG CGC GCC CCG GGC GGG GGG GCG GGG GCA CGG GGG GAA CGC GAA GAA CCT TAC-3 (underline means GC clamp); reverse, 5 -CGG TGT GTA CAA GAC CC-3 . The procedures for PCR were as follows: pre-denaturalization for 10 min at 94.0 • C, 35 cycles of denaturalization for 45 s at 94.0 • C, annealing for 45 s at 62.8 • C, extension for 45 s at 72.0 • C, followed by extension for 10 min at 72.0 • C. Specific separation of PCR amplification products was performed by DGGE, as previously described [24]. Briefly, PCR-amplified samples were subjected to 7-h electrophoresis at 150 V through a 40% polyacrylamide gel at 60 • C, and then were subjected to electrophoresis again through 40% to 60% denaturing gradient gel.…”

Section: Denaturing Gradient Gel Electrophoresis (Dgge)mentioning

confidence: 99%

“…The plasmid DNA mentioned above was sequenced by Invitrogen Biotechnology Co., Ltd. (Shanghai, China) and analyzed using the BLAST program (http://www.ncbi.nlm.nih.gov/blast) [24,25]. The sequence distance matrix for all pair wise sequence combinations was analyzed using MEGA 4.0.2 software with the neighbor-joining phylogenetic tree method.…”

Section: Dna Sequencing and Phylogenetic Tree Analysismentioning

confidence: 99%

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Dihydropyridine Enhances the Antioxidant Capacities of Lactating Dairy Cows under Heat Stress Condition

Zhao

Cai

et al. 2020

Animals

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Heat stress (HS), a nonspecific response to environmental heat, can seriously affect dairy cow health. Feed additives may alleviate HS in dairy cows by improving rumen fermentation efficacy, stimulating feed consumption, enhancing vasodilation, and/or improving antioxidant capacity. The temperature–humidity index (THI) indicates that spring is a non-HS season, and summer is an HS season. HS results in the decrease in dairy cow antioxidant capacities. Our results indicated the decrease in superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT), and total antioxidation (T-AOC) levels and the increase in malondialdehyde (MDA) level during HS season. Meanwhile, antioxidant indexes (SOD, GSH-Px, and T-AOC) were positively correlated with milk yield (p < 0.01), whereas MDA exhibited a significant negative correlation with milk yield (p < 0.05). In addition, the effects of dihydropyridine (DHP) on antioxidant capacity and ruminal microbial communities in dairy cows under HS were investigated. During summer, dairy cows were randomly assigned into two groups under HS, including a standard diet (S-ND) group and standard diet with 3 g/day/cow DHP (S-D) group. DHP treatment significantly restored SOD and GSH-Px levels under HS. Denaturing gradient gel electrophoresis results indicated that the DHP altered ruminal bacterial community mainly composed Proteobacteria and Firmicutes in dairy cows under HS. Our results suggest that DHP can enhance the antioxidant abilities of dairy cows with favorable effects on ruminal microbial communities under HS, further alleviating HS on dairy cows.

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“…3) successive transformation -unidirectional transformation of substances into other ones, also considered as pollutants (most typical example -successive transformations of organic nitrogen into ammonium, nitrite and nitrate) [17,18]; 4) mutual transformation.…”

Section: Review Of Literary Resourcesmentioning

confidence: 99%

Improvement of the Model of Transformation of Nitrogen-Containing Substances in a Water Body for the Solution of Nature Management Problem

Proskurnin

Berezenko

Kyrpychova

et al. 2017

EUREKA: Life Sciences

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In the article is considered the one of aspects of nature management regulation – an account of successive transformation of pollutants in a water body, that come with waste waters of industrial, municipal and agricultural enterprises. It is necessary at the determination of permissible pollutants emission with waste waters that doesn’t allow the excess of the permissible level of substances content in the control point of a water body. This problem is considered on the example of successive transformation of nitrogen-containing substances in the following transformation order: organic nitrogen – ammonium nitrogen - nitrite nitrogen – nitrate nitrogen. The topicality of the modeling of nitrogen-containing substances is conditioned by their role in water ecosystems functioning. At that existent mathematical models of natural water quality formation that take into account substances transformation contain the large number of unknown parameters. So, the use of such models in problems of nature management regulation is problematic, because identification of model parameters is a separate very complicated scientific problem. And existent models with relatively small number of parameters don’t take into account the natural pollution of water bodies, caused by the life activity of organisms; substance losses in the transformational chain are also possible. The improved matrix mathematical model of nitrogen-containing substances transformation without the indicated shortcomings is offered.

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Nitrogen and phosphorus transformations and balance in a pond-ditch circulation system for rural polluted water treatment

Cited by 32 publications

References 132 publications

A Review of Nitrogen Removal for Urban Stormwater Runoff in Bioretention System

A Review of Nitrogen Removal for Urban Stormwater Runoff in Bioretention System

Dihydropyridine Enhances the Antioxidant Capacities of Lactating Dairy Cows under Heat Stress Condition

Improvement of the Model of Transformation of Nitrogen-Containing Substances in a Water Body for the Solution of Nature Management Problem

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