Nitrogen removal and mass balance in newly-formed Myriophyllum aquaticum mesocosm during a single 28-day incubation with swine wastewater treatment

Liu, Feng; Zhang, Shunan; Wang, Yi; Li, Yong; Xiao, Runlin; Li, Hongfang; He, Yang; Zhang, Miaomiao; Wang, Di; Li, Xi; Wu, Jinshui

doi:10.1016/j.jenvman.2015.11.020

Cited by 67 publications

(23 citation statements)

References 39 publications

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“…The lower average removal rate obtained in this bed for N compounds for both seasons periods can be associated to the average COD organic load that was relatively high for all sampling periods (12 August-13 June: 22.4 g CODt m −2 day −1 ; warm period: 14.9 g CODt m −2 day −1 ; cold period: 26.8 g CODt m −2 day −1 ) and generally outside the interval normally recommended both by International design criteria to size HSSF-CWs (5-20 g CODt m −2 day −1 ) [32] and by German guidelines ATV-A 262 (16 g CODt m −2 day −1 ) [16]. The oxygen available for microorganisms is used first by heterotrophic organic removal bacteria and later by nitrifying bacteria and, thus, the observed high organic loading rate may have contributed to the oxygen availability being insufficient for the two mechanisms [2,3].…”

Section: Phosphorous Removalmentioning

confidence: 99%

“…When compared to conventional wastewater treatment systems, HSSF-CWs have shown to be a sustainable technology, which has been widely used to treat different types of wastewater and is simple to build and easy to operate and maintain [1,2]. They are also characterized by being low energy and chemical reagents demanding systems; consequently, they have become an alternative to conventional systems for the sanitation of small scale treatment plants.…”

Section: Introductionmentioning

confidence: 99%

“…However, this mechanism is only one very small part of nutrient removal in these systems. In fact, in CWs, nitrogen removal is subject to a wide range of transformations that include physical, chemical and biological processes involving various mechanisms such as ammonification, nitrification with further denitrification, microbial immobilization and matrix adsorption [2,9,10]. Unlike nitrogen, which could be eliminated of the system by nitrification/denitrification, phosphorous in wastewater is usually removed by retaining in the CW system [11].…”

Section: Introductionmentioning

confidence: 99%

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Effectiveness and Temporal Variation of a Full-Scale Horizontal Constructed Wetland in Reducing Nitrogen and Phosphorus from Domestic Wastewater

et al. 2018

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Abstract:Cultural eutrophication stimulated by anthropogenic-derived nutrients represents one of most widespread water quality problems worldwide. Constructed wetlands (CWs) have emerged as an aesthetic, sustainable form of wastewater treatment, but, although they have shown adequate levels of organic matter removal in wastewaters, the effectiveness of nutrient removal has been less successful. An eleven-month monitoring program was undertaken in a horizontal subsurface flow CW (HSSF-CW) treating domestic wastewater from a village in Centre Region of Portugal, to evaluate the influence of climatic conditions (Continental-Mediterranean Climate region) and seasonal variations on removal. This CW uses gravel and sand as substrate and Phragmites australis as wetland plants. Samples were collected at the inlet and outlet from wetland bed and analyzed for pH, TN, Org-N, NH 4 + -N, NO x -N, TP and DP. The removal efficiencies (RE) of nitrogen and phosphorus compounds were relatively poor, but the results allow us to conclude that season had a significant (p < 0.05) effect on the RE of TN, NH 4 + -N, NO x -N, TP and DP, with higher values in warmest period (10.4%, 10.4%, 3.4%, 27.5% and 26.1%, respectively) than in coldest period (0%, −7.7%, −9.8%, 12.9% and 0%, respectively). Although lower hydraulic loading rate (HLR) generally resulted in better RE of all N and P compounds analyzed, no significant linear relationship was observed between these two variables. TN and NH 4 + -N concentrations in the effluent tend to significantly (p < 0.05) decrease with increasing respective incoming mass load rates for whole monitoring period and during spring-summer period, while the correlation between outlet TP concentrations and the inlet loading rate are not significant. The results indicate that the system is not effective for removal of nutrients, probably because it operated on overload and with a low hydraulic retention time (HRT) (average = 2.4 days). The results also showed that the RE of N and P followed seasonal trends, with higher values during spring-summer period.

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Section: Phosphorous Removalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effectiveness and Temporal Variation of a Full-Scale Horizontal Constructed Wetland in Reducing Nitrogen and Phosphorus from Domestic Wastewater

et al. 2018

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“…Excessive discharge of domestic sewage and livestock wastewater heavily loaded with N, P and organic compounds have resulted in a growing number of rivers in many areas of China that have become deteriorated (Qu and Fan, 2010;Ning et al, 2014). Many studies demonstrated that M. aquaticum could survive in high N-loaded wastewater (Zhang et al, 2017) and reduce nutrient loads (Liu et al, 2016). Thus, M. aquaticum could potentially be an alternative restoration tool.…”

Section: Introductionmentioning

confidence: 99%

Eutrophic water or fertile sediment: which is more important for the growth of invasive aquatic macrophyte Myriophyllum aquaticum?

Tan

et al. 2018

Knowl. Manag. Aquat. Ecosyst.

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-Invasive macrophyte Myriophyllum aquaticum is capable of assimilating nutrients from both the sediments and the water column. However, which is the major source of nutrients supporting M. aquaticum growth under various nutrient regimes has not been well documented. Here we conducted a twofactorial outdoor experiment (three levels of nutrient loading and two types of sediments) from 23 May to 27 June 2016, to assess M. aquaticum responses to different nutrient levels in the water column and the sediment. Results showed that concentrations of total nitrogen, total phosphorus and chlorophyll a in the water column increased in the treatment groups, but decreased slightly in the control group (nutrient-poor sediment and no nutrient addition). Sediment type had a significant effect on the growth M. aquaticum, while there were no significant effects of nutrient loading levels and the interactions between the two factors. Mean relative growth rate, mean plant height, mean stem diameter, the number of lateral branches and roots in the nutrient-rich sediment treatments were 1.6, 1.2, 1.6, 3.2 and 5.9 folds greater than in the nutrient-poor sediment treatments, respectively. These results suggest that nutrient-rich sediment has a positive effect on the growth of M. aquaticum. This study reveals possible expansion mechanism of the exotic M. aquaticum in China, and may provide valuable information on the ecological restoration of eutrophic freshwaters.Keywords: Myriophyllum aquaticum / nutrient level in water column / sediment type / growth characteristics / expansion mechanism Résumé -Eau eutrophe ou sédiment fertile: quel est le plus important pour la croissance du macrophyte envahissant Myriophyllum aquaticum? Le Myriophyllum aquaticum est capable d'assimiler les nutriments des sédiments et de la colonne d'eau. Toutefois, les sources principales de nutriments qui soutiennent la croissance du M. aquaticum dans divers régimes nutritionnels n'ont pas été bien documentées. Nous avons mené une expérience en extérieur à deux facteurs (trois niveaux de charge nutritive et deux types de sédiments) du 23 mai au 27 juin 2016, afin d'évaluer les réponses de M. aquaticum à différents niveaux nutritifs dans la colonne d'eau et les sédiments. Les résultats ont montré que les concentrations d'azote total, de phosphore total et de chlorophylle a dans la colonne d'eau augmentaient dans les groupes de traitement, mais diminuaient légèrement dans le groupe témoin (sédiments pauvres en éléments nutritifs et aucun ajout de nutriments). Le type de sédiments a eu un effet significatif sur la croissance du M. aquaticum, alors qu'il n'y a eu aucun effet significatif des niveaux de charge en éléments nutritifs et des interactions entre les deux facteurs. Le taux de croissance relatif moyen, la hauteur moyenne des plantes, le diamètre moyen des tiges, le nombre de branches latérales et de racines dans les traitements des sédiments riches en éléments nutritifs étaient respectivement de 1.6, 1.2, 1.6, 3.2 et 5.9 fois plus élevés que dans le...

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“…However, E. crassipes has been found to be an exotic species without natural enemies, which will likely deteriorate the ecosystems in the long term [25]. On the contrary, the risks of M. aquaticum spreading into other ecosystems could be manageable [26,27].…”

Section: Introductionmentioning

confidence: 99%

Myriophyllum aquaticum-Based Surface Flow Constructed Wetlands for Enhanced Eutrophic Nutrient Removal—A Case Study from Laboratory-Scale up to Pilot-Scale Constructed Wetland

Feng

Zhang

et al. 2018

Water

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Water pollution caused by various eutrophic nutrients such as nitrogen (N) and phosphorus (P), such as outbreaks of eutrophication in rivers and lakes, has become a serious environmental problem in China. Such problems have spurred extensive studies aiming at finding environmentally friendly solutions. Various constructed wetlands (CWs), planted with different macrophytes, have been considered as environmentally safe technologies to treat various wastewaters for several decades. Due to their low energy and operational requirements, CWs are promising alternative solutions to water eutrophication problems. Within the CWs, macrophytes, sediments, and the microbial community are indispensable constituents of such an ecosystem. In this study, a laboratory-scale surface flow CW (LSCW) was constructed to investigate the effects of two different plants, Eichhornia (E.) crassipes (Mart.) Solms and Myriophyllum (M.) aquaticum, on the removal of eutrophic N and P. The results showed that both plants could significantly reduce these nutrients, especially ammonium (NH4+), and LSCW planted with M. aquaticum performed better (82.1% NH4+ removal) than that with E. crassipes (66.4% NH4+ removal). A Monod model with a plug flow pattern was used to simulate the relationship of influent and effluent concentrations with the kinetic parameters of this LSCW. Based on the model, a pilot-scale surface flow CW (PSCW) was designed, aiming to further enhance N and P removal. The treatment with M. aquaticum and polyethylene materials showed the best removal efficiency on NH4+ as well as on total nitrogen and phosphorus. In general, the enlarged PSCW can be a promising solution to the eutrophication problems occurring in aquatic environments.

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Nitrogen removal and mass balance in newly-formed Myriophyllum aquaticum mesocosm during a single 28-day incubation with swine wastewater treatment

Cited by 67 publications

References 39 publications

Effectiveness and Temporal Variation of a Full-Scale Horizontal Constructed Wetland in Reducing Nitrogen and Phosphorus from Domestic Wastewater

Effectiveness and Temporal Variation of a Full-Scale Horizontal Constructed Wetland in Reducing Nitrogen and Phosphorus from Domestic Wastewater

Eutrophic water or fertile sediment: which is more important for the growth of invasive aquatic macrophyte Myriophyllum aquaticum?

Myriophyllum aquaticum-Based Surface Flow Constructed Wetlands for Enhanced Eutrophic Nutrient Removal—A Case Study from Laboratory-Scale up to Pilot-Scale Constructed Wetland

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