Pollutant removal from domestic wastewater with Taro (Colocasia esculenta) planted in a subsurface flow system

Bindu, T K; Sylas, V. P.; Mahesh, M.; Rakesh, Patel; Ramasamy, E. V.

doi:10.1016/j.ecoleng.2008.02.007

Cited by 55 publications

(26 citation statements)

References 34 publications

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“…This result is similar to those reported by Fillion et al (2011) and Holm and Heinsoo (2013), who found that using a willow vegetation filter was useful for P and N removal. Unlike N, the mechanism of P removal is reported to be sorption, complexation, precipitation, biotic assimilation, and plant uptake (Zhang et al 2007;Bindu et al 2008). The relatively higher removal efficiency of P in the plant system observed in the current study might be attributed to plant uptake and microbial assimilation.…”

Section: Phosphorus Removalcontrasting

confidence: 49%

“…Eutrophication may result in widespread degradation of many freshwater ecosystems (Fang et al 2007;Hu et al 2008). Therefore, wastewater from municipal, agricultural, and industrial sources must be treated before its entry into natural waterways in order to reduce the negative impact of high concentrations of nutrients (Bindu et al 2008). Many economical alternatives to wastewater remediation are being pursued, including phytoremediation with certain aquatic and wetland plants (Calheiros et al 2007;Wu et al 2011;Zhao et al 2012;Li et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Growth and efficiency of nutrient removal by Salix jiangsuensis J172 for phytoremediation of urban wastewater

Shi

Sun

Pan

et al. 2015

Environ Sci Pollut Res

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Willows are a group of versatile tree species that may have multiple environmental applications. In the present study, Salix jiangsuensis J172 plants were grown in the fixed mats as an economic plant-based treatment system to evaluate its potential for removing nutrients in wastewater. Plants grew normally in wastewater compared with those in Hoagland solution. However, wastewater containing a high concentration of chlorine ions was toxic to S. jiangsuensis J172 plants. The plants accumulated large amounts of nitrogen and phosphorus in aboveground tissues under conditions of abundant supply. The removal efficiency for raw wastewater was 82.18-87.78 % for nitrogen, 57.35-65.58 % for phosphorus, and 58.24-59.90 % for chemical oxygen demand. Nutrient removal efficiency was positively correlated with the initial nutrient supply. The results show that S. jiangsuensis J172 grown in the fixed mat economic plant-based treatment system with nutrient-rich, eutrophic water may be an effective, low-cost phytoremediation technology to treat water containing undesirable levels of wastewater.

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Section: Phosphorus Removalcontrasting

confidence: 49%

Section: Introductionmentioning

confidence: 99%

Growth and efficiency of nutrient removal by Salix jiangsuensis J172 for phytoremediation of urban wastewater

Shi

Sun

Pan

et al. 2015

Environ Sci Pollut Res

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“…Sometimes, wilting of the shoots was also noticed which might be due to variations of responses of individual plant to high level of organic and/or nutrient loading of the influent that can cause stress to the plants (Bindu et al 2008).…”

Section: Plant Growth and Nutrient Analysis Of Vetiver Grassmentioning

confidence: 99%

Bioremediation of brewery wastewater using hydroponics planted with vetiver grass in Addis Ababa, Ethiopia

Abebe

Tefera

Kloos

et al. 2018

Bioresour. Bioprocess.

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Background: Bioremediation is the use of biological interventions for mitigation of the noxious effects caused by pollutants in the environment including wastewater. It is very useful approach for a variety of applications in the area of environmental protection. It has become an attractive alternative to the conventional cleanup technologies that employ plants and their associated microorganisms to remove, contain, or render harmless environmental contaminants.Methods: Three parallel hydroponic treatment systems (each 2 m long × 0.75 m wide × 0.65 m deep) and one control unit were filled with brewery wastewater to an effective depth of 0.5 m. Two sets of floating polystyrene platform were used for each treatment unit to support vetiver tillers for conducting bioremediation study. The wastewater was fed to the hydroponic treatment units at hydraulic loading rate of 10 cm d −1 and hydraulic residence time of 5 days. Influent and effluent samples were collected once a month for 7 months, and analyzed to determine the various parameters relating to the water quality including plant growth and nutrient analyses.Results: Vetiver grass grew and established with well-developed root and shoots in the hydroponics under fluctuations of brewery wastewater loads and showed phytoremedial capacity to remove pollutants. Removal efficiencies for BOD 5 and COD were significant (p < 0.05), up to 73% (748-1642 mg l −1 inlet), and up to 58% (835-2602 mg l −1 inlet), respectively. Significant removal efficiencies (p < 0.05) ranged from 26 to 46% (14-21 mg l −1 inlet) for TKN, 28-46% (13-19 mg l −1 inlet) for NH 4 + -N, 35-58% (4-11 mg l −1 inlet) for NO 3 − -N, and 42-63% (4-8 mg l −1 inlet) for PO 4 −3 -P were recorded. Nutrient accumulation in the samples harvested were varied between 7.4 and 8.3 g N kg −1 dry weight and 6.4-7.5 g P kg −1 dry weight in the hydroponic treatment units during the study period. Conclusions:This study has shown suitability of vetiver grass for organics and nutrient removal in the bioremediation of brewery wastewater using hydroponics technique in addition to production of valuable biomass. Bioremediation using hydroponics is green and environmentally sustainable approach that offers promising alternative for wastewater treatment in developing countries including Ethiopia.

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“…Constructed wetland is a method widely used for the treatment of RW in recent years, with high efficiency and low cost (Marco et al 2004;Gustavsson et al 2007;Lesage et al 2007;Bindu et al 2008). A paddy wetland system is a kind of constructed wetland (Cao et al 1984;Smit et al 2008), and RW contains a large amount of nutrients (N and P), which can be reused through the paddy wetland system Hans and Carlos 2005;Kaoru and Yasuo 2007), so that N load from RW can be alleviated greatly, and N losses risk can be greatly reduced (Michael et al 2008;Schäffer et al 2008).…”

mentioning

confidence: 99%

Rural wastewater irrigation and nitrogen removal by the paddy wetland system in the Tai Lake region of China

Song

Liang

et al. 2009

J Soils Sediments

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Background, aim, and scope A large area of water eutrophication in the Tai Lake region of China was associated with nitrogen (N) and phosphorus (P) pollution, mainly due to the discharge of untreated rural wastewater (RW) into the surface water (SW) near villages of this region. A field experiment was conducted, using irrigation of RW plus urea fertilization under equal nitrogen (N) rate, namely, black water (BW), domestic wastewater (DW), gray water (GW), SW, and SW without any N application as a control (CK), to elucidate N removal by the paddy wetland system during the rice growing season of 2007. Materials and methods SW, GW, DW, and BW were collected from the village of Liangzhu in subtropical China. Water samples were stored in darkness at 4°C in an icebox prior to analysis. Total nitrogen (TN) was analyzed by the spectrophotometric method with a continuous-flow automated analyzer. For the soil analyses, pH was measured using a pH meter with soil/distilled water = 1:5; cation exchange capacity was determined with an unbuffered salt extraction method. Redox potential (Eh) was obtained using a pH meter with a platinum electrode, whereas organic carbon (C) was determined using the Walkley and Black method. TN was calculated by acid-alkali neutralization, after the soil samples were digested with concentrated sulfuric acid (H 2 SO 4 ), distilled and then absorbed by diluted boric acid (H 3 BO 3 ), and available N was determined by alkaline-proliferation law, after the samples were hydrolyzed, reduced, and absorbed by H 3 BO 3 . Available P was determined with the colorimetric method at the wave length of 660 nm, after the samples were extracted with NaHCO 3 , and available K was extracted by unbuffered NH 4 Cl and then determined by the atomic absorption spectrophotometer. The rice plant samples were digested with H 2 SO 4 -H 2 O 2 , and N contents were analyzed by the atomic absorption spectrophotometry. Results Yield for the CK was significantly less (P≤0.05) than those of SW, GW, DW, and BW, with the yield of BW significantly greater (P≤0.05) than all the other treatments. The TN concentration of the floodwater in the paddy wetland system decreased rapidly after transplanting, rose significantly (P≤0.05) after two N topdressings, and then decreased gradually as the following sequences: SW>GW> DW>BW>CK, but tended to be stable until 15 October. Meanwhile, TN removal rates from the wastewater were significantly higher (P≤0.05) than those from the urea fertilizer. Total N load (TNL) increased significantly after two topdressings and reached the maximum value just after the first topdressing on 22 July: SW, 21.0 kg ha −1 ; GW, 19.1 kg ha -1 ; BW, 15.3 kg ha -1 ; DW, 14.3 kg ha -1 ; and CK, 0.57 kg ha -1 . Subsequently, TNL declined gradually and reached stability on 15 October. Just after the rice seedlings were transplanted, the soil released a large amount of inorganic N (26.3%-40.4%); however, after the topdressing,

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Pollutant removal from domestic wastewater with Taro (Colocasia esculenta) planted in a subsurface flow system

Cited by 55 publications

References 34 publications

Growth and efficiency of nutrient removal by Salix jiangsuensis J172 for phytoremediation of urban wastewater

Growth and efficiency of nutrient removal by Salix jiangsuensis J172 for phytoremediation of urban wastewater

Bioremediation of brewery wastewater using hydroponics planted with vetiver grass in Addis Ababa, Ethiopia

Rural wastewater irrigation and nitrogen removal by the paddy wetland system in the Tai Lake region of China

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