Evaluation of solid waste stratified mixtures as constructed wetland fillers under different operation modes

Mateus, Dina M. R.; Pinho, Henrique J. O.

doi:10.1016/j.jclepro.2020.119986

Cited by 30 publications

(18 citation statements)

References 34 publications

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“…The pilot-scale CW was developed under the Valorbio research project [41]. Details on the design and experimental setup of the modular-type pilot-scale CW, characteristics of the solid waste used as filling media, and the main results obtained are described elsewhere [42][43][44][45].…”

Section: Methodsmentioning

confidence: 99%

“…The CW is filled with four layers of solid waste, from bottom to top: 5 cm of fragmented residues of limestone rock; 10 cm of coal slag; 25 cm of cork granulates; and 10 cm of fragmented residues of limestone rock. This stratified layer combination of solid waste was optimized in previous works to beneficiate from the combined hydraulic properties and contributions to removing pollutants from wastewater [44,45].…”

Section: Wastewater Characterístics and Treatment Setupmentioning

confidence: 99%

“…The well water is necessary to overcome the storage shortage in August and September.Maximum flowrate in the CW input stream is expected during May. Considering a maximum design flow rate of 0.052 m 3 /m 2 /day for stratified solid waste-filled CWs[45], it is required to set up a total area of wetland beds of 900 m 2 . This area can be achieved using nine CW beds, each 5 m wide and 20 m long.…”

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confidence: 99%

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Sustainable Production of Reclaimed Water by Constructed Wetlands for Combined Irrigation and Microalgae Cultivation Applications

Pinho

Mateus

2021

Hydrology

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Considering the increasing pressure on freshwater resources due to the constant increase in water consumption and insufficient wastewater control and treatment, recovering wastewater is a path to overcoming water scarcity. The present work describes the potential of reusing treated wastewater (reclaimed water) for irrigation and production of microalgae biomass in an integrated way, through experimental evaluation of plant and microalgae growth, and creation of an application model. First, two parallel experiments were conducted to evaluate the use of reclaimed water produced by a constructed wetland filled with a mix of solid waste: the irrigation of a set of small pots filled with soil and planted with Tagetes patula L., and the cultivation of microalgae Chlorella sp. and a mixed microalgae population with predominant species of the genus Scenedesmus sp. in shaken flasks and tubular bubble column photobioreactors. Results indicated no negative effects of using the reclaimed water on the irrigated plants and in the cultivated microalgae. The growth indicators of plants irrigated with reclaimed water were not significantly different from plants irrigated with fertilized water. The growth indicators of the microalgae cultivated with reclaimed water are within the range of published data. Second, to apply the results to a case study, the seasonal variability of irrigation needs in an academic campus was used to propose a conceptual model for wastewater recovery. The simulation results of the model point to a positive combination of using reclaimed water for the irrigation of green spaces and microalgae production, supported by a water storage strategy. Water abstraction for irrigation purposes can be reduced by 89%, and 2074 kg dry weight microalgae biomass can be produced annually. Besides the need for future work to optimize the model and to add economical evaluation criteria, the model shows the potential to be applied to non-academic communities in the perspective of smarter and greener cities.

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Section: Methodsmentioning

confidence: 99%

Section: Wastewater Characterístics and Treatment Setupmentioning

confidence: 99%

mentioning

confidence: 99%

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Sustainable Production of Reclaimed Water by Constructed Wetlands for Combined Irrigation and Microalgae Cultivation Applications

Pinho

Mateus

2021

Hydrology

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“…This could be explained by the offsetting effects of the increasing and decreasing pathways for RE in soil when compared with sand and gravel, i.e., the increases by the stimulation of macrophyte growth in biomass and the decreases by the bio lm attachment function (Wang et al, 2020). Generally, compared with macrophytes, substrates are the dominant factor determining pollutant RE ability (Mateus & Pinho, 2020;Yang et al, 2018). However, at a salinity of 0.8‰, the advantage of sand or gravel to soil in bio lm attachment supply was probably relatively limited in the startup period of the CWs (Bo et al, 2015;Ramond et al, 2012) and resulted in the canceling effect.…”

Section: 4mentioning

confidence: 99%

Influent salinity affects substrate selection in surface flow constructed wetlands

Zhou

Zhao

et al. 2021

Environ Sci Pollut Res

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Conducted in pilot-scale surface ow constructed wetlands (SFCWs), this study's objective is to identify the effect of in uent salinity on substrate selection. Compared with gravel and sand SFCWs, soil SFCWs performed similarly to worse and similarly to better at low and high salinities, respectively, in removal e ciencies (REs) of salt, total nitrogen (TN), total phosphorous (TP) and chemical oxygen demand (COD). Soil generally increased macrophyte growth (especially at high salinity) in dry biomass, leaf chlorophyll concentration, root activity and root catalase and superoxide dismutase activities. The decrease of bacterial diversity in rhizosphere may be caused by high salinity, while soil improved rhizosphere bacterial community stability at varying salinities more than gravel or sand. At high salinity, soil support of macrophytes and rhizosphere microorganism increased pollutant REs in SFCWs or at least offset relatively poor bio lm attachment to soil. This highlights the necessity of the varying substrate selection in SFCWs with in uent salinities for both increasing pollutant REs and reducing input cost.

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“…4 -P and NH + 4 -N were measured photometrically using multiparameter photometer HANNA HI-83,399 reagent test kits: a) PO 3− 4 -P, HI93713 and HI93717; b) NH + 4 -N, HI93715 and HI93733 (see Table 3) [45,46]. These determinations are modifications of standard procedures from APHA-AWWA-WEF (2017) [47].…”

Section: Po 3−mentioning

confidence: 99%

Potential Application of Chilean Natural Zeolite as a Support Medium in Treatment Wetlands for Removing Ammonium and Phosphate from Wastewater

Vera-Puerto

Saravia

Olave

et al. 2020

Water

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This study aims to evaluate the sorption characteristics of NH 4 + -N and PO 4 3 − -P onto the surface of natural zeolites coming from Chile and their potential application in the subsurface-flow treatment wetlands for wastewater treatment in rural areas. For this purpose, adsorption experiments onto the zeolite were developed in batch assays. The effects of the adsorbent quantity (20 g and 50 g) and particle size (0.2–1.0 mm; 1.5–3.0 mm, and 5.0–8.0 mm) were evaluated in terms of adsorption capacity at different NH4+-N and PO4−3-P concentrations. Then, the obtained laboratory results were adjusted to theoretical models: Saturation-growth-rate and Langmuir. The saturation adsorption of NH4+-N on the zeolite increases at the same time that the initial concentration increases for the same zeolite quantity; however, the saturation values were similar between the different zeolite sizes tested. For PO4−3-P, the adsorption did not have a direct relationship with the initial concentration nor zeolite quantity and better results were only achieved for zeolite sizes of 1.5–3.0 mm. Regarding the Langmuir model, sizes of 1.5–3.0 mm had the best adsorption characteristics, with the maximum adsorption capacity of up to 1.58 mg/g for NH4+-N and up to 0.08 mg/g for PO4−3-P. Therefore, a new material—a natural zeolite from the Maule Region of Chile—is described as a potential support medium for treatment wetlands.

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Evaluation of solid waste stratified mixtures as constructed wetland fillers under different operation modes

Cited by 30 publications

References 34 publications

Sustainable Production of Reclaimed Water by Constructed Wetlands for Combined Irrigation and Microalgae Cultivation Applications

Sustainable Production of Reclaimed Water by Constructed Wetlands for Combined Irrigation and Microalgae Cultivation Applications

Influent salinity affects substrate selection in surface flow constructed wetlands

Potential Application of Chilean Natural Zeolite as a Support Medium in Treatment Wetlands for Removing Ammonium and Phosphate from Wastewater

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