Constructed wetlands for saline wastewater treatment: A review

Liang, Yinxiu; Zhu, Huiling; Bañuelos, Gary S.; Yan, Baixing; Zhou, Qingwei; Yu, Xiubo; Cheng, Xiangdong

doi:10.1016/j.ecoleng.2016.11.005

Cited by 185 publications

(86 citation statements)

References 135 publications

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“…9 Wastewater originated from agriculture, aquaculture, and many industrial sectors usually has high salinity with a variety of organic compounds. 10 It is a significant challenge to treat this kind of wastewater due to the adverse effects of salinity, which has a negative influence on microbial metabolic activity, pollutant removal and sludge settleability. [11][12][13] Salinity exerts toxic effects on microorganisms during biodegradation processes.…”

Section: Introductionmentioning

confidence: 99%

Enhanced carbon and nitrogen removal performance of simultaneous anammox and denitrification (SAD) with mannitol addition treating saline wastewater

Yang

Zhu

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Simultaneous anammox and denitrification (SAD) can remove carbon and nitrogen. However, its performance is suppressed under saline surroundings. In this work, mannitol was used to enhance a SAD process treating saline wastewater. RESULTS The optimum carbon and nitrogen removal was achieved at 0.2 mmol L−1 mannitol, during which ammonium removal efficiency (ARE), nitrite removal efficiency (NRE) and chemical oxygen demand (COD) removal efficiency were 96.95%, 93.70% and 90.05%, respectively. The maximum ammonium removal rate (ARR), nitrite removal rate (NRR) and the specific anammox activity (SAA) were increased by 25.49%, 55.84% and 33.83% with optimum addition (0.2 mmol L−1 mannitol) respectively. The diameter of sludge was enlarged with the addition of mannitol (≤0.2 mmol L−1). The Tseng‐Wayman model was more suitable to simulate the whole SAD process. The modified logistic model, the modified Boltzman model and the modified Gompertz model were all appropriate to describe nitrogen removal in a typical cycle with the addition of mannitol. CONCLUSION Mannitol was effective in enhancing a SAD process treating saline wastewater, and maximum nitrogen removal was achieved at mannitol = 0.2 mmol L−1. The Tseng‐Wayman model satisfactorily predicted the whole SAD process treating saline wastewater with mannitol addition. © 2018 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Enhanced carbon and nitrogen removal performance of simultaneous anammox and denitrification (SAD) with mannitol addition treating saline wastewater

Yang

Zhu

et al. 2018

J of Chemical Tech & Biotech

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“…Consequently, an important amount of pollutants could be sequestered in totora biomass (both dead and alive). Together, all these features make totora a very attractive plant for its use in constructed wetlands, particularly for saline waters [4,75,77,78], as results presented here show its resistance both to heavy metals and to saline conditions.…”

Section: Discussionmentioning

confidence: 72%

Suitability of Totora (Schoenoplectus californicus (C.A. Mey.) Soják) for Its Use in Constructed Wetlands in Areas Polluted with Heavy Metals

Blanco

2018

Sustainability

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Schoenoplectus californicus subsp. tatora (totora) is an endemic plant from wetlands in South America's Altiplano region. In the endorheic Titicaca-Desaguadero-Poopó-Salar de Coipasa system (TDPS), totora can be found along rivers, lakes, and shallow ponds. Lake Uru-Uru is a minor lake placed upstream of Lake Poopó, and it gets water inflows from the Desaguadero River, the city of Oruro and several mining and metallurgic complexes. Polluted waters from these origins, together with natural high salinity and high presence of As and Pb, make Lake Uru-Uru an ideal location to search for plant species suitable to be used in constructed and restored wetlands under pollution stress, particularly in systems with high pH and salty waters. To test if totora could meet such requirements, healthy plants were collected at two sites in Lake Uru-Uru with different exposure to polluted inflows. Chemical composition of different organs (leaves, rhizomes and roots) were compared. Results indicated totora's capacity to withstand high concentrations of a cocktail of multiple pollutants and heavy metals. Particularly, this research showed totora as a multi-hyperaccumulator (concentrations in shoots higher than 1000 mg kg −1 ) for As, Fe and Ni. These results, combined with totora's intrinsic high rates of biomass production, slow decomposition rates and its value as raw material for local craftwork and industrial uses, support the recommendation to use totora in constructed or restored wetlands, particularly in sites polluted with heavy metals, and in waters with high salinity.

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“…Plants can absorb nutrients and pollutants in wastewater, and thereby play a vital role in the wastewater purification process (Gao et al 2014, Liang et al 2017b, Zheng et al 2019. However, the presence of salts can affect multiple functions and activities exhibited by plants.…”

Section: Introductionmentioning

confidence: 99%

Influence of salt stress on propagation, growth and nutrient uptake of typical aquatic plant species

Chen

Cheng

Zhu

et al. 2019

Nordic Journal of Botany

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Anthropogenic activities and natural causes contribute to an increase in the area and degree of degraded saline wetlands in arid/semi‐arid and coastal regions. The objective of this study was to determine the salt tolerance of the seven aquatic plant species Phragmites australis, Arundo donax, Canna indica, Scirpus validus, Alternanthera philoxeroides, Phyllostachys heteroclada and Potederia cordata during asexual reproduction and continuous growth. The species were exposed to five salinity treatments from 0.3 (control) to 20 dS m−1 during a 30 day experiment. Data were collected on asexual reproduction and growth, chlorophyll content in leaves, Na+ and K+ concentrations, total nitrogen (TN) and total phosphorus (TP) concentrations in above‐ground biomass (AGB) and below‐ground biomass (BGB). The results showed that: 1) increase in salinity (especially at a salinity level of EC ≥15 dS m−1) generally inhibited the capacity for asexual reproduction and reduced the chlorophyll content of leaves; 2) total dry biomass of plants was significantly negatively related to asexual reproduction; 3) species‐specific salt tolerance mechanisms were reflected by the Na+ and K+ concentrations and Na+/K+ ratios in different parts of the plants; and 4) the absorption of TN and TP were inhibited at high salinity (i.e. EC = 20 dS m−1) in AGB and BGB of most tested plant species. However, salinity may enhance plant uptake of TN and TP under certain conditions (e.g. EC at 5, 10 and 15 dS m−1). In general, as compared to the other species tested, giant reed A. donax and alligator weed A. philoxeroides showed relatively high asexual reproduction and growth capacity under high salt stress, and these species should thus be considered as candidates for restoration of degraded saline wetlands and/or for decontaminating saline wastewater.

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Constructed wetlands for saline wastewater treatment: A review

Cited by 185 publications

References 135 publications

Enhanced carbon and nitrogen removal performance of simultaneous anammox and denitrification (SAD) with mannitol addition treating saline wastewater

Enhanced carbon and nitrogen removal performance of simultaneous anammox and denitrification (SAD) with mannitol addition treating saline wastewater

Suitability of Totora (Schoenoplectus californicus (C.A. Mey.) Soják) for Its Use in Constructed Wetlands in Areas Polluted with Heavy Metals

Influence of salt stress on propagation, growth and nutrient uptake of typical aquatic plant species

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