Two-step system consisting of novel vertical flow and free water surface constructed wetland for effective sewage treatment and reuse

Nguyen, Xuan Cuong; Trinh, Nguyen Duy; Tran, Quoc Ba; Nguyen, Thi Tinh; Tran, Thanh-Nha; Tran, Thi Cuc Phuong; Nguyen, Thanh-Binh; Tran, Tai T.; La, D. Duong; Chang, Soon Woong; Ravindran, Balasubramani; Chung, Woojin; Yoon, Yong Soo; Nguyễn, Văn Khánh

doi:10.1016/j.biortech.2020.123095

Cited by 19 publications

(15 citation statements)

References 39 publications

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“…In another study, Nguyen et al [51] tested a hybrid CW comprising a VSSF CW followed by a FWS CW. The VSSF CW consisted of layers of expanded clay (ExC), sandy soil, sand, and gravel and was planted with Colocasia esculenta.…”

Section: Hybrid Constructed Wetlandsmentioning

confidence: 99%

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

et al. 2021

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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.

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Section: Hybrid Constructed Wetlandsmentioning

confidence: 99%

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

et al. 2021

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“…The resistances of the target microbes, the degree of damage due to ozonation, and the quality of wastewater are some of the factors that assist in the further reduction of ARBs in ozonation treatment. Combinations of different units are effective for reduction in abundance for Pseudomonas, Enterococcus and E. coli [ 131 , 132 ]. The conventional treatment of wastewater that includes removal of solids, sediments, grease, sludge [ 133 ], biological removal of nutrients such as nitrates and phosphates [ 134 ] along with tertiary treatment for disinfection [ 135 ], use of CWs [ 136 ], advanced oxidation process (AOP) [ 137 ] and hybrid units are efficient for the elimination of a large number of ARBs [ 138 ].…”

Section: Review Findingsmentioning

confidence: 99%

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

Hazra

Durso

2022

Antibiotics

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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.

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“…The tanks were steel-made rectangular prisms with 0.5 × 0.5 × 1.0 m (length × width × height). Each VF comprised four material layers with a total working height of 0.8 m. While filter layers in the VF 1 followed the order from the top to the bottom of the sandy soil, sand, ExC and gravel with the corresponding height of 10, 20, 40 and 10 cm (Nguyen et al, 2020a), respectively, that in the VF 2 was placed in the same order (top-bottom) of sandy soil, sand, biochar, and gravel with the height of 10, 20, 40, and 10 cm (Nguyen et al, 2020b), respectively. Sandy soil is top, where creating the substrate for plants to grow and sand layer helps to stabilize the soil substrate.…”

Section: Description Of the Treatment Systemmentioning

confidence: 99%

“…Seedling of plants was collected from a home J o u r n a l P r e -p r o o f garden, subsequently cut into the length of 25 cm, and planted with 10 cm of space (16 seedlings in each tank). More detailed information on the VF tanks could be found elsewhere (Nguyen et al, 2020a, Nguyen et al, 2020b.…”

Section: Description Of the Treatment Systemmentioning

confidence: 99%

Vertical flow constructed wetlands using expanded clay and biochar for wastewater remediation: A comparative study and prediction of effluents using machine learning

Nguyen

Peng

et al. 2021

Journal of Hazardous Materials

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Two-step system consisting of novel vertical flow and free water surface constructed wetland for effective sewage treatment and reuse

Cited by 19 publications

References 39 publications

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

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

Vertical flow constructed wetlands using expanded clay and biochar for wastewater remediation: A comparative study and prediction of effluents using machine learning

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