Adsorption study on municipal solid waste leachate using Moringa oleifera seed

Sivakumar, D.

doi:10.1007/s13762-012-0089-8

Cited by 25 publications

(9 citation statements)

References 38 publications

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“…In particular, the pollutant load to the environment is dependent on the quantity and the quality of the water that percolates through the landfill (Kale et al 2010, Papadopoulou et al 2007, Renou et al 2008. Thus, estimate leachate generation and transport during the life of a landfill is a key issue in order to reduce its potential risk (Sivakumar 2013). To this end, an useful tool is represented by simulation models based on the water balance method.…”

Section: Introductionmentioning

confidence: 99%

A new screening model for leachate production assessment at landfill sites

Pantini

Verginelli

Lombardi

2013

Int. J. Environ. Sci. Technol.

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This paper presents an alternative water balance model for predicting leachate production in landfills, from the operative to the post-closure management. The developed model, based on analytical and empirical equations, provides a quantitative estimation of leachate volumes, using a water balance approach which accounts for the different rates of the incoming water, water losses and water consumption. Aging and compression are also included, allowing to assess the progressive variation of hydraulic and physical properties of deposited wastes. In this work, after a brief description of the model architecture, different applications to hypothetical scenarios and to a real landfill are presented. Namely, in order to highlight how aging and biodegradation can influence the expected leachate production, the results of the developed model are also compared with those provided by the Hydrologic Evaluation of Landfill Performance model which neglects both these processes. The obtained results showed that wastes compression may affect leachate prediction in a large extent during operative stage of a landfill, and neglecting these processes could lead to underestimation up to one order of magnitude. Also biodegradation of waste organic matter may result relevant for leachate volumes assessment, influencing water storage capacity of wastes and leading to a leachate production 2-3 times greater than those obtained neglecting these phenomena. Finally, the application of the developed model to the real landfill shows a quite good agreement with the field data, whereas the Hydrologic Evaluation of Landfill Performance model tends to underestimate the leachate volumes with errors up to 80 %.

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Section: Introductionmentioning

confidence: 99%

A new screening model for leachate production assessment at landfill sites

Pantini

Verginelli

Lombardi

2013

Int. J. Environ. Sci. Technol.

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“…On the other hand, we obtained a minimum turbidity level at about 6.44 NTU and color values of 30 Pt-Co for the evaluated starches. Even though these results do not fulfil the WHO requirements, they are acceptable since these values are commonly obtained in processes of clarification of high turbidity water (Sivakumar 2013, Tassinaria et al 2013. Application of this method could be considered using some other varieties of plantains, as well as different natural products that are typical from the Caribbean region at Colombia.…”

Section: Color and Turbidity Removalmentioning

confidence: 94%

“…It should be noticed that this research ultimately evaluates the CF stage, and that an additional filtration process could yield better results, since CF represents only a primary treatment (Sivakumar 2013).…”

Section: Color and Turbidity Removalmentioning

confidence: 99%

EVALUATION OF THE COAGULANT CAPACITY OF STARCH OBTAINED FROM TOPOCHO PELIPITA PLANTAIN CLONE (Musa ABB) FOR TURBIDITY AND COLOR REMOVAL IN RAW WATERS

Tirado

Herrera

Correa

2017

Rev. Int. Contam. Ambie.

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Flocculation and coagulation of organic material contained in raw water samples were evaluated by using starch as coagulation agent. The starch was obtained from topocho pelita (Musa ABB) plantain clone, which is grown in the south area of the department of Bolivar, Colombia. Native starch (NS) was chemically modified with acetic anhydride obtaining an 18.3 % degree of acetylation (low acetylated starch, LAS) and 23.7 % (high acetylated starch, HAS). The chemical structure of these biomaterials was analysed by Fourier transform infrared (FTIR) spectroscopy. Characteristic peaks were observed at 1350 cm -1 (C-O stretching) and 950 cm -1 (C-O-C bending). Scanning electron microscopy (SEM) was used to determine morphology and size of the starch samples. Elongated grain shapes with sizes of 37 ± 8 mm (NS), 35 ± 11 mm (LAS) and 307 ± 85 mm (HAS) were observed through this technique, suggesting a relationship between the degree of acetylation and the agglomeration of grains. Analysis of variance indicated that concentration of the starch samples is the only factor, which has a statistically significant effect on the response variables (color and turbidity) at a 95 % confidence level. Color removal capacities of 94 %, 93 % and 89 % were estimated using the NS, LAS and HAS samples, respectively, at a concentration of 200 mg/L. Additionally, a turbidity removal capacity of 96 % was estimated for the NS sample, which compares very well with the 95 % turbidity removal capacity obtained from the acetylated starches. The latter indicates that native starch presents suitable properties to be used as coagulation agent for water treatment.Palabras clave: almidón nativo, almidón acetilado, grado de acetilación, coagulación, floculación RESUMEN La floculación y la coagulación de materia orgánica presente en muestras de aguas crudas fueron evaluadas usando como agente coagulante almidón obtenido a partir del plátano del clon topocho pelipita (Musa ABB) cultivado en el sur del departamento de Bolívar, Colombia. La capacidad de coagulación del almidón nativo (NS, por sus siglas en inglés) fue comparada con almidón modificado químicamente con anhídrido Rev. Int. Contam. Ambie. 33 (Especial Biotecnología e ingeniería ambiental) 125-134, 2017 DOI: 10.20937/RICA.2017 D.F. Tirado et al. 126 acético con grados de sustitución del 18.3 % (LAS, por sus siglas en inglés) y 23.7 % (HAS, por sus siglas en inglés). Espectroscopía de infrarrojo (FTIR, por sus siglas en inglés) fue usada para determinar la estructura química de estos biomateriales, se observaron vibraciones en 1350 cm -1 (estiramiento C-O) y 950 cm -1 (flexión C-O-C). Microscopía electrónica de barrido (SEM, por sus siglas en inglés) se usó para determinar la morfología y el tamaño de las muestras de almidón, se observó una forma de granos alargados, los cuales exhibieron tamaños de 37 ± 8 mm (NS), 35 ± 11 mm (LAS) y 307 ± 85 mm (HAS). Esto sugiere que el aumento en grados de sustitución puede ocasionar la aglomeración de los granos y su consiguiente aumento de tamaño. E...

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“…Cost and other setbacks associated with the use of chemical coagulants including lowering water pH [23], put MO at an exceeding advantage. MO prevents the growth of coliforms, sodomonas and aeroginosen [24], this reduces potential health risks to downstream communities that make use of water bodies into which effluent is discharged. As MO is organic, its sludge can be anaerobically digested thereby increasing biogas yield unlike the use of chemical coagulants.…”

Section: Moringa Oleifera Seeds As a Coagulantmentioning

confidence: 99%

Chemically Enhanced Primary Treatment-Trickling Filter with <i>Moringa oleifera</i> Seeds for Improved Energy Recovery from Wastewater Treatment Plants in Malawi

Mndelemani¹,

Song²,

Wei³

et al. 2018

IJEPP

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Only 10% of the population in Malawi has access to electricity and there is increasing surface water pollution especially in urban areas. This research was conducted with the objectives of improving electricity generation and reducing water pollution in Malawi. A chemically enhanced primary treatment-trickling filter (CEPT-TF) system with Moringa oleifera (MO) seeds as a coagulant is proposed for municipal wastewater (WW) treatment to achieve both objectives. CEPT improves energy recovery by increasing the proportion of captured raw COD whose anaerobic digestion gives higher CH 4 yield than secondary COD. The COD removal efficiency of MO was investigated by conducting jar tests and COD tests using WW samples from three different WWTPs in Suzhou New District, China. The amount of energy recoverable was estimated using an equation derived from COD removal efficiencies and the stoichiometric relationships between COD and CH 4. The results showed a COD removal efficiency of 74% with MO concentration of 50mg/l for 880mg/l COD which is an average COD for municipal WW in Malawi. It is found that the WWTPs in Malawi's two big cities of Blantyre and Lilongwe have the potential of producing 9,781.86kWh/d of electricity. CEPT-TF will offer sustainable solutions in Malawi, MO can be planted on sites creating closed loop systems as it provides the coagulant and gets watered and nourished with the effluent from the WWTP.

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Adsorption study on municipal solid waste leachate using Moringa oleifera seed

Cited by 25 publications

References 38 publications

A new screening model for leachate production assessment at landfill sites

A new screening model for leachate production assessment at landfill sites

EVALUATION OF THE COAGULANT CAPACITY OF STARCH OBTAINED FROM TOPOCHO PELIPITA PLANTAIN CLONE (Musa ABB) FOR TURBIDITY AND COLOR REMOVAL IN RAW WATERS

Chemically Enhanced Primary Treatment-Trickling Filter with <i>Moringa oleifera</i> Seeds for Improved Energy Recovery from Wastewater Treatment Plants in Malawi

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Adsorption study on municipal solid waste leachate using Moringa oleifera seed

Cited by 25 publications

References 38 publications

A new screening model for leachate production assessment at landfill sites

A new screening model for leachate production assessment at landfill sites

EVALUATION OF THE COAGULANT CAPACITY OF STARCH OBTAINED FROM TOPOCHO PELIPITA PLANTAIN CLONE (Musa ABB) FOR TURBIDITY AND COLOR REMOVAL IN RAW WATERS

Chemically Enhanced Primary Treatment-Trickling Filter with &lt;i&gt;Moringa oleifera&lt;/i&gt; Seeds for Improved Energy Recovery from Wastewater Treatment Plants in Malawi

Contact Info

Product

Resources

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Chemically Enhanced Primary Treatment-Trickling Filter with <i>Moringa oleifera</i> Seeds for Improved Energy Recovery from Wastewater Treatment Plants in Malawi