Integrated treatment of combined sewer wastewater and stormwater in a hybrid constructed wetland system in southern Spain and its further reuse

Ávila, Cristina; Salas, Juan José Sendra; Martín, Isabel López; Aragón, C. A.; García, Joan

doi:10.1016/j.ecoleng.2012.08.009

Cited by 89 publications

(30 citation statements)

References 27 publications

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“…The aerobic conditions present in VF systems likely contributed to this ammonium reduction due to the oxidation of NH 4 + to NO 3 − (nitrification) under aerobic condition [16]. This result is in line with other studies using a similar VF system with gravel as a substrate, such as that in which a reduction of ammonium of 47.5% was achieved under similar influent concentrations [17] and another one under Mediterranean weather, where a reduction of 74% was reached with an influent concentration of 43.1 mg/L [18]. In addition, the ammonium-reduction performance of these two HEWTS containing VF components were similar to 88% of ammonia-N removal found in other study [9] in a hybrid VF-HF system as the mean reduction in our systems averaged 85.3%.…”

Section: Ammoniumsupporting

confidence: 81%

Comparative Study of Three Two-Stage Hybrid Ecological Wastewater Treatment Systems for Producing High Nutrient, Reclaimed Water for Irrigation Reuse in Developing Countries

Zurita

White

2014

Water

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In this study, three different two-stage hybrid ecological wastewater treatment systems (HEWTS) with combinations of horizontal flow (HF) constructed wetlands (CWs), vertical flow (VF) CWs and stabilization ponds (SP) were evaluated for the removal of Organic-N, NH 4 + , NO 3 − , Total N, Total P, Total Coliforms (TCol) and Escherichia Coli, BOD, COD and TSS. The overall goal of the study was novel in comparison to most other studies in that we sought to evaluate and compare the efficiency of the three HEWTSs for water quality improvements, while minimizing nutrient removal from the wastewater in order to generate high quality reclaimed water for reuse for irrigation of crops. The most effective systems were those systems containing a vertical flow component, either HF-VF or VF-HF. In these two HEWTS, NH 4 + was reduced by 85.5% and 85.0% respectively, while NO 3 − was increased to 91.4 ± 17.6 mg/L and to 82.5 ± 17.2 mg/L, respectively, an artifact of nitrification. At the same time, E. coli was reduced by 99.93% and 99.99%, respectively. While the goal of most wastewater treatment is focused on reducing nutrients, the results here demonstrate that two-stage HEWTSs containing VF components can be used to produce a high quality effluent while retaining inorganic nutrients, thereby conserving this valuable resource for reuse as irrigation water for agriculture in subtropical developing countries where water and fertilizer resources are scarce or expensive.

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Section: Ammoniumsupporting

confidence: 81%

Comparative Study of Three Two-Stage Hybrid Ecological Wastewater Treatment Systems for Producing High Nutrient, Reclaimed Water for Irrigation Reuse in Developing Countries

Zurita

White

2014

Water

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“…A pre-estimation of economic analysis has been done for 1m 3 /day of sewage inflow based on the results generated by bench scale trials (Table 5). The result of this analysis suggested that the application of the Bio-hedge process could lead to 66% less land space than the conventional system and 32% less land space than the shallow pond wetland water hyacinth systems; making the phytoremediation process more sustainable.…”

Section: Pre-estimation Of Capital Costmentioning

confidence: 99%

“…In recent years, the application of constructed wetlands (with rooted, emergent and free-floating aquatic plants), and facultative ponds treating domestic sewage have attracted considerable attention because they offer an environmentally sound approach [3][4][5][6]. The mechanisms of pollutant removal in constructed wetlands involve an interaction between the bacterial metabolism, plant uptake and accumulation [7].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Domestic Wastewater Treatment Using a Bio-Hedge Water Hyacinth Wetland System

Valipour

Raman

Ahn

2015

Water

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Constructed wetland applications have been limited by a large land requirement and capital investment. This study aimed to improve a shallow pond water hyacinth system by incorporating the advantages of engineered attached microbial growth technique (termed Bio-hedge) for on-site domestic wastewater treatment. A laboratory scale continuous-flow system consists of the mesh type matrix providing an additional biofilm surface area of 54 m 2 /m 3 . Following one year of experimentation, the process showed more stability and enhanced performance in removing organic matter and nutrients, compared to traditional water hyacinth (by lowering 33%-67% HRT) and facultative (by lowering 92%-96% HRT) ponds. The wastewater exposed plants revealed a relative growth rate of 1.15% per day, and no anatomical deformities were observed. Plant nutrient level averaged 27 ± 1.7 and 44 ± 2.3 mg N/g dry weight, and 5 ± 1.4 & 9±1.2 mg P/g dry weight in roots and shoots, respectively. Microorganisms immobilized on Bio-hedge media (4.06 × 10 7 cfu/cm 2 ) and plant roots (3.12 × 10 4 cfu/cm) were isolated and identified (a total of 23 strains). The capital cost was pre-estimated for 1 m 3 /d wastewater at 78 US$/m 3 inflow and 465 US$/kg BOD5 removed. This process is a suitable ecotechnology due to improved biofilm formation, reduced footprint, energy savings, and increased quality effluent. OPEN ACCESSWater 2015, 7 330

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“…Many studies have been carried out throughout the world on constructed wetlands for secondary or even tertiary treatment of various types of wastewaters, such as municipal wastewaters [77,78] and storm-water [79,80]. As far as agricultural runoff is concerned, there are many studies worldwide about the feasibility of constructed wetlands to reduce the pollution of agricultural runoff [81][82][83][84][85].…”

Section: Phytodepurationmentioning

confidence: 99%

Integral Management of Irrigation Water in Intensive Horticultural Systems of Almería

et al. 2017

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Abstract:The development of intensive horticulture in Almería, with a huge increase in greenhouse surface area, is related to three essential factors: climatic characteristics, groundwater use and mulching sandy soil. The purpose of the present paper is to draw a picture of the integral management of water irrigation in the intensive horticultural systems in the region, by identifying the most significant water resource contributions and alternative water resources. Results indicate that the use of groundwater for the irrigation of horticultural crops in the greenhouses presents a high degree of overexploitation of the aquifers, but due to the continuous search for alternative water resources, such as desalinated and reclaimed water, as well as in-depth knowledge of the integral management of water irrigation through automated fertigation and localized irrigation systems, the current status of the water resources could be sustainable. Moreover, being conscious of the pollution generated by agricultural leachates, the horticultural system of Almería is implementing complementary sustainable systems such as recirculation, cascade cropping systems and phytodepuration for the reuse of the leachate. Considering all these factors, it can be concluded that the intensive horticultural system is on the right path towards respecting the environment and being sustainable in terms of water use.

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Integrated treatment of combined sewer wastewater and stormwater in a hybrid constructed wetland system in southern Spain and its further reuse

Cited by 89 publications

References 27 publications

Comparative Study of Three Two-Stage Hybrid Ecological Wastewater Treatment Systems for Producing High Nutrient, Reclaimed Water for Irrigation Reuse in Developing Countries

Comparative Study of Three Two-Stage Hybrid Ecological Wastewater Treatment Systems for Producing High Nutrient, Reclaimed Water for Irrigation Reuse in Developing Countries

Effectiveness of Domestic Wastewater Treatment Using a Bio-Hedge Water Hyacinth Wetland System

Integral Management of Irrigation Water in Intensive Horticultural Systems of Almería

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