Treating wastewater under zero waste principle using wetland mesocosms

Ezzat, Safaa M.; Moustafa, Mohammed Taha

doi:10.1007/s11783-020-1351-9

Cited by 9 publications

(9 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This fact can be explained by the need for a longer residence time between wastewater and media as it was proposed by Torrens et al [ 54 ]. Recently, Ezzat and Moustafa [ 55 ] reported positive influence of zeolite as media in horizontal treatment wetlands for pathogens removal with a theoretical HRT of 2.93 d, which is six times higher than theoretical HRT of this work (0.5 d).…”

Section: Resultscontrasting

confidence: 49%

Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands

Vera-Puerto

Valdés

Correa

et al. 2021

IJERPH

View full text Add to dashboard Cite

The aim of this work was to evaluate the performance of vertical subsurface flow treatment wetlands (VSSF TWs) for treating rural domestic wastewater when strategies such as bed depth reduction and media change are used in combination with bottom saturation. Two treatment wetland systems were implemented: normal (VF-N), with a bed depth of 1.0 m, and modified (VF-M), with a bed depth of 0.5 m and a bottom layer of natural zeolite. Schoenoplectus californicus was used as experimental plant. These two treatment systems were operated at a hydraulic loading rate of 120 mm/d in two phases. Phase I did not use bottom saturation, while Phase II involved a bottom saturation of the zeolite layer of the VF-M system. The results show that bed depth reduction did not have a significant effect (p > 0.05) in terms of organic matter, solids, and ammonium removal. Conversely, it had a significant influence (p < 0.05) on phosphate as well as a negative effect on pathogen removal. This influence could be explained by initial media capacity for phosphorus removal and filtration importance in the case of pathogens. Partial saturation only had a positive influence on total nitrogen removal. The addition of a bottom layer of natural zeolite showed no positive effect on nutrient removal. The plant showed adaptation and positive development in both VF-N and VF-M. The water balance showed that water loss was not influenced by bed depth reduction. Therefore, according to the previous results, a combination of the proposal modifications to VSSF TWs can be introduced for treating rural domestic wastewater.

show abstract

Section: Resultscontrasting

confidence: 49%

Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands

Vera-Puerto

Valdés

Correa

et al. 2021

IJERPH

View full text Add to dashboard Cite

show abstract

“…However, the removal of nutrients and specifically phosphorus was limited, due to the restricted contact between the substrate and the wastewater. This can be improved by incorporating a reactive media such as zeolite [36]. However, FWS CWs require extensive area and present a significant risk of pathogen exposure, making them unsuitable for secondary treatment of wastewater and reuse in agriculture.…”

Section: Discussion On Cws Performances Under Different Design and Op...mentioning

confidence: 99%

“…Ezzat and Moustafa [36] also evaluated a system comprising a dynamic roughing filter (DRF) followed by three horizontal free water surface flow wetland mesocosms, arranged in parallel, treating wastewater supplied from a septic tank. The FWS CWs were planted with Cyperus papyrus using two different bed materials: soil or soil amended with zeolite.…”

Section: Free Water Surface Constructed Wetlands (Fws Cws)mentioning

confidence: 99%

“…This study also concluded that the inhibition ability of Cyperus papyrus (L.) roots' extracts towards pathogenic bacteria is equivalent to that of the synthetic standard antibiotic amoxycillin/clavulanate. Furthermore, six antibacterial and antioxidant substances of medicinal interest were identified in plant root extracts, making the harvested plants a valuable economic resource to balance the operating costs [36].…”

Section: Free Water Surface Constructed Wetlands (Fws Cws)mentioning

confidence: 99%

See 1 more Smart Citation

Potential Use of Constructed Wetland Systems for Rural Sanitation and Wastewater Reuse in Agriculture in the Moroccan Context

et al. 2021

View full text Add to dashboard Cite

Located in a semi-arid to arid region, Morocco is confronting increasing water scarcity challenges. In the circular economy paradigm, the reuse of treated wastewater in agriculture is currently considered a possible solution to mitigate water shortage and pollution problems. In recent years, Morocco has made significative progress in urban wastewater treatment under the National Wastewater Program (PNA). However, rural sanitation has undergone significant delays. Therefore, an alternative technology for wastewater treatment and reuse in rural areas is investigated in this review, considering the region’s economic, social, and regulatory characteristics. Constructed wetlands (CWs) are a simple, sustainable, and cost-effective technology that has yet to be fully explored in Morocco. CWs, indeed, appear to be suitable for the treatment and reuse of wastewater in remote rural areas if they can produce effluent that meets the standards of agricultural irrigation. In this review, 29 studies covering 16 countries and different types of wastewater were collected and studied to assess the treatment efficiency of different types of CWs under different design and operational parameters, as well as their potential application in agricultural reuse. The results demonstrated that the removal efficiency of conventional contamination such as organic matter and suspended solids is generally high. CWs also demonstrated a remarkable capacity to remove heavy metals and emerging contaminants such as pharmaceuticals, care products, etc. The removal of microbial contamination, on the other hand, is challenging, and does not satisfy the standards all the time. However, it can be improved using hybrid constructed wetlands or by adding polishing treatment. In addition, several studies reported that CWs managed to produce effluent that met the requirements of wastewater reuse in agriculture of different countries or organisations including Morocco.

show abstract

“…There is an emerging awareness of the value provided by biological treatment processes employing CWs [ 160 , 161 ]. CWs have a long history of being utilized for pollutant removal, and research has shown them to be capable of significant reductions of organic pollutants, nutrients [ 162 ], heavy metals [ 163 , 164 ], antibiotics, and emergent contaminants such as ARG/ARB [ 32 , 165 ].…”

Section: Review Findingsmentioning

confidence: 99%

Performance Efficiency of Conventional Treatment Plants and Constructed Wetlands towards Reduction of Antibiotic Resistance

Hazra

Durso

2022

Antibiotics

View full text Add to dashboard Cite

Domestic and industrial wastewater discharges harbor rich bacterial communities, including both pathogenic and commensal organisms that are antibiotic-resistant (AR). AR pathogens pose a potential threat to human and animal health. In wastewater treatment plants (WWTP), bacteria encounter environments suitable for horizontal gene transfer, providing an opportunity for bacterial cells to acquire new antibiotic-resistant genes. With many entry points to environmental components, especially water and soil, WWTPs are considered a critical control point for antibiotic resistance. The primary and secondary units of conventional WWTPs are not designed for the reduction of resistant microbes. Constructed wetlands (CWs) are viable wastewater treatment options with the potential for mitigating AR bacteria, their genes, pathogens, and general pollutants. Encouraging performance for the removal of AR (2–4 logs) has highlighted the applicability of CW on fields. Their low cost of construction, operation and maintenance makes them well suited for applications across the globe, especially in developing and low-income countries. The present review highlights a better understanding of the performance efficiency of conventional treatment plants and CWs for the elimination/reduction of AR from wastewater. They are viable alternatives that can be used for secondary/tertiary treatment or effluent polishing in combination with WWTP or in a decentralized manner.

show abstract

Treating wastewater under zero waste principle using wetland mesocosms

Cited by 9 publications

References 37 publications

Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands

Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands

Potential Use of Constructed Wetland Systems for Rural Sanitation and Wastewater Reuse in Agriculture in the Moroccan Context

Performance Efficiency of Conventional Treatment Plants and Constructed Wetlands towards Reduction of Antibiotic Resistance

Contact Info

Product

Resources

About