Horizontal subsurface flow constructed wetland for tertiary treatment of dairy wastewater: Removal efficiencies and plant uptake

Schierano, María Celeste; Panigatti, María Cecilia; Maine, María Alejandra; Griffa, Carina A.; Boglione, Rosana

doi:10.1016/j.jenvman.2020.111094

Cited by 57 publications

(25 citation statements)

References 50 publications

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“…The mineralization of organic nitrogen into nitrate form, a source of easily available nitrogen for plant growth, decreased which might be due to nitrogen uptake of nitrates by the growing plants for nutrition. Similar results were reported by others (Schierano et al 2020;Ashraf et al 2020;Ciria et al 2005). Schierano et al (2020 in a study to evaluate contaminants removal e ciency of subsurface ow constructed wetland for tertiary treatment of dairy wastewater using Typha domingensis reported that mean removal e ciencies of BOD and COD were 57.9% and 68.7%, respectively.…”

Section: Typha (Cattail Plant)supporting

confidence: 92%

Changes in Physico-Chemical Composition of Wastewater by Growing Phragmites ausrtalis and Typha in an Arid Environment in Saudi Arabia

Alquwaizany¹,

Hussain²,

Ai³

2021

Preprint

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Kingdom of Saudi Arabia is facing an acute shortage of good quality of water which is further aggravated due to inadequate and non-renewable groundwater resources. Hence, it is very important to explore other alternatives such as natural wastewater treatment (phytoremediation) for water supplies that can both lower the dependent on groundwater resources and overcome the challenges and limitations associated with conventional wastewater treatment technologies. Therefore, the main objective of this research was to study the performance and efficiency of green plants such as Typha and Phragmites australis for wastewater treatment in eastern Saudi Arabia. The experiment was carried out in fiberglass tanks (each with a capacity of 4.0 x 7.0 x 0.5 m3) in the field. There was a total of 4 fiberglass tanks with 2-replications. A percent decrease of 72.86 and 49.74%, 39.30 and 18.07%, 39.84 and 52.87%, 38.73 and 40.86%, 74.49 and 57.82%, and 66.82 and 63.14% was observed for turbidity, TSS, nitrate, ammonia, BOD, and COD by growing Phragmites australis and Typha, respectively. The heavy metals such as aluminum, zinc, and arsenic showed considerable reduction of pollutants in treated water compared to raw wastewater under both plants. Overall, it seems that the improvement in wastewater quality was better by growing phragmites australis than Typha, however, there were no statistically significant differences between the two plants means in their performance of raw wastewater treatment. The study results indicate that green plants could be used in a phytoremediation system to treat wastewater in rural and small communities.

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Section: Typha (Cattail Plant)supporting

confidence: 92%

Changes in Physico-Chemical Composition of Wastewater by Growing Phragmites ausrtalis and Typha in an Arid Environment in Saudi Arabia

Alquwaizany¹,

Hussain²,

Ai³

2021

Preprint

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“…Our research has found that when zeolite was used as the carrier of the trickling filter, its removal efficiencies on NH 4 + -N, TN and COD were 80.52%, 64.73%, and 83.93%, respectively. Schierano et al (Schierano et al 2020) employed gravel to construct a pilot-scale horizontal subsurface flow constructed wetland (HSSFW) for tertiary treatment of dairy wastewater. The removal efficiencies of COD, TKN, and NO 3 − -N were 68.7%, 25.7%, and 47.8%, respectively.…”

Section: Overall Performance Of Nitrogen and Cod Removal With Different C/n Ratios In Microaerated Ztfmentioning

confidence: 99%

Nitrogen removal performance and bacterial communities in zeolite trickling filter under different influent C/N ratios

Liu

Tao

et al. 2020

Environ Sci Pollut Res

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In this study, the degradation performance of nutrients in zeolite trickling filter (ZTF) with different influent C/N ratios and aeration conditions was investigated. Microaeration was beneficial for enhancing NH 4 + -N removal performance. Due to the sufficient carbon source supply under a C/N ratio of 8, a high removal efficiency of NH 4 + -N and TN was simultaneously observed in ZTF. In addition, TN removal mainly occurred at the bottom, which might be explained by the sufficient nutrients available for bacteria to multiply in this zone. The abundant genera were Acinetobacter, Gemmobacter, Flavobacterium, and Pseudomonas, all of which are heterotrophic nitrification-aerobic denitrification (HNAD) bacteria. In addition, biofilm only slowed down the adsorption rate but did not significantly reduce the adsorption capacity of zeolite. Bio-zeolite had NH 4 + -N well adsorption capacity and bio-desorption capacity. Biological nitrogen removal performance was superior to physicochemical absorption of zeolite. The results suggested that the physicochemical of zeolite and biochemical reactions of microorganism coupling actions may be the main nitrogen transformation pathway in ZTF. Our research provides a reference for further understanding the nitrogen removal mechanism of zeolite bioreactors.

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“…They have the advantages of low construction cost and good treatment effect, etc. and are widely used (Schierano et al 2020;Deng et al 2020). A CW is a natural wetland system with manual monitoring and control.…”

Section: Introductionmentioning

confidence: 99%

Removal of Phosphorus from Domestic Sewage by a Constructed Wetland Coupled Microbial Fuel Cell System

Dou

Yin

et al. 2021

Preprint

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A constructed wetland (CW) coupled microbial fuel cell (MFC) system that treats wastewater and generates electricity was constructed. The total phosphorus in the simulated domestic sewage was used as the treatment target, and the optimal phosphorus removal effect and electricity generation were determined by comparing the changes in substrates, hydraulic retention times, and microorganisms. The mechanism underlying phosphorus removal was also analyzed. The experimental results showed that the best removal efficiencies of the two CW-MFC systems that used magnesia and garnet as substrates were 80.3% and 92.4%, respectively. Phosphorus removal by the garnet matrix mainly depends on a complex adsorption process whereas the magnesia system relies on ion exchange reactions. The CW-MFC system can also generate electricity. The highest output voltage and stable voltage of the garnet system were both higher than those of the magnesia system. The maximum stable voltage of the garnet device was 500 mV, while that of the magnesia device was 290 mV. The microorganisms in the soil and in the electrode within the wetland sediments also substantially changed, indicating that microorganisms positively respond to the removal of organic matter and power generation. Combining the advantages of constructed wetlands and microbial fuel cells also improves phosphorus removal in the coupled system. Therefore, when studying a CW-MFC system, the selection of electrode materials, matrix, and system structure should be taken into account in order to find a method that will improve the power generation capacity of the system and remove phosphorus.

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Horizontal subsurface flow constructed wetland for tertiary treatment of dairy wastewater: Removal efficiencies and plant uptake

Cited by 57 publications

References 50 publications

Changes in Physico-Chemical Composition of Wastewater by Growing Phragmites ausrtalis and Typha in an Arid Environment in Saudi Arabia

Changes in Physico-Chemical Composition of Wastewater by Growing Phragmites ausrtalis and Typha in an Arid Environment in Saudi Arabia

Nitrogen removal performance and bacterial communities in zeolite trickling filter under different influent C/N ratios

Removal of Phosphorus from Domestic Sewage by a Constructed Wetland Coupled Microbial Fuel Cell System

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