Coagulation–flocculation treatment of high-strength agro-industrial wastewater using natural Cassia obtusifolia seed gum: Treatment efficiencies and flocs characterization

Shak, Katrina Pui Yee; Wu, Ta Yeong

doi:10.1016/j.cej.2014.06.093

Cited by 179 publications

(82 citation statements)

References 35 publications

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“…Coagulant dosage that depends on the TSS or colloid content in the wastewater, is an significant parameter during coagulationflocculation [9]. Basically, if the dose is inadequate or too high, it will cause low efficiency in flocculation.…”

Section: Coagulant or Flocculant Dosage Effectmentioning

confidence: 99%

Timecourse Study of Coagulation-Flocculation Process Using Aluminum Sulfate

Farasat¹,

Panahi²,

Mokhtarani³

2017

Water conserv. manag.

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In conformity with drinking water standards, water purification units must remove colloid impurities in water which shelters microorganisms such as bacteria and viruses, and natural organic matter (NOM) using the sequence of treatment processes including coagulation-flocculation, sedimentation or filtration and disinfection. The coagulationflocculation process consists of rapid mixing, followed by slow mixing and settling at room temperature. Efficiency of coagulation-flocculation process depends on process parameters. Optimization of significant parameters such as initial pH, coagulant and flocculant dosage, settling time, mixing parameters and the effective temperature for coagulation-flocculation performance is crucial. In this study, time course study of coagulation-flocculation as well as the effects of coagulant dosage and pH in the synthetic wastewater produced by kaolin was investigated. Coagulant dosage and pH optimization is necessary to achieve optimal efficiency. Appropriate coagulant dosage, pH and settling time were 70 mg/L, 6.5 and 45 minutes, respectively and resulted in 99.72% turbidity removal.Cite this article as: Zahra Farasat, Reza Panahi, Babak Mokhtarani (2017). Timecourse Study Of CoagulationFlocculation Process Using Aluminium Sulfate. Water Conservation and Management , 1(2):07-09.

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Section: Coagulant or Flocculant Dosage Effectmentioning

confidence: 99%

Timecourse Study of Coagulation-Flocculation Process Using Aluminum Sulfate

Farasat¹,

Panahi²,

Mokhtarani³

2017

Water conserv. manag.

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“…Estudios confirman este hecho en extractos de semillas de Moringa oleifera para la remoción de sólidos suspendidos mediante adsorción y neutralización de cargas debido a la presencia de gomas y proteínas en el extracto (Yarahmadi et al, 2009). Gomas (galactomananos) de semilla de Cassia obtusifolia también se han utilizado para la remediación de aguas residuales de aceite de palma (Shak & Wu, 2014), así como las gomas de semillas de Cassia angustifolia para la remoción de colorantes (Sanghi, Bhatttacharya, & Singh, 2002). Además, a polisacáridos como la amilopectina extraída del jugo de tubérculos de Maerua subcordata se atribuye el efecto coagulante para la clarificación de agua superficial (Mavura, Chemelil, Saenyi, & Mavura, 2008).…”

Section: Mecanismos Físico-químicos De Coagulación Naturalunclassified

Coagulación natural para la descontaminación de efluentes industriales

et al. 2016

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La contaminación industrial y agrícola ha generado indudablemente un alto impacto ambiental en los recursos naturales de nuestro planeta. Se prevé carencias en la provisión de agua para consumo humano debido a la contaminación de fuentes naturales. En respuesta a esto, la aplicación de coagulantes de hierro y aluminio son la primera opción para el tratamiento de aguas residuales. No obstante, el uso abundante de aluminio es objeto de discusión debido a la posible afectación al ser humano. Por tanto, el presente artículo destaca los últimos avances en el campo de la coagulación natural, una tecnología ancestral utilizada para la descontaminación del agua. Su demostrada efectividad se fundamenta en mecanismos de desestabilización electrocinética que remueven la turbidez hasta un 99%. Evidencias experimentales coinciden que concentraciones de taninos y mucílagos permiten la remediación de efluentes de industrias químicas como textileras y de curtiembres.

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“…The spectra presented in Figure 1 show strong and sharp peaks at 36003200cm -1 , respectively (Fatombi et al, 2013;Shak & Wu, 2014;Janakiraman & Johnson, 2015). The C=O functional group of carbocylic acids and esters was observed around 17801710cm -1 (Fedala et al, 2015), and peaks at 1650, 1540, and 1240 cm -1 belong to the primary, secondary and tertiary amides, respectively (Wang et al, 2009;Fatombi et al, 2013).…”

Section: Ftir Analysismentioning

confidence: 99%

Exploration of Various Indonesian Indigenous Plants as Natural Coagulants for Synthetic Turbid Water

Kristianto¹,

Paulina²,

Soetedjo³

2018

IJTech

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The availability of clean water is one of the biggest global problems, especially in developing countries. The simplest way to treat turbid water is by using coagulation. However, the utilization of chemical coagulants such as alum and ferrum has several drawbacks, including a high sludge volume and negative health impact when the water is consumed. Natural coagulants offer a better option, especially because of their availability, low price, lower sludge volume, and effectiveness comparable with chemical coagulants. In this study we utilize Moringa oleifera, Carica papaya and Leucaena leucocephala seeds, which are indigenous plants in Indonesia, as natural coagulants. An FTIR study was conducted to qualitatively identify the possible active coagulant agent in the seeds. The coagulant performance in removing turbidity of synthetic kaolin water was studied using jar test apparatus at various levels of coagulant dosage and pH. Functional groups of -OH, N-H, C=O, and primary, secondary and tertiary amides were identified in all the seeds. Neither the dosage nor the pH had an effect on turbidity removal when M.oleifera was used as the natural coagulant, but did have some effect on papaya and leucaena. The turbidity removal obtained in this study was comparable with other reported results, therefore it can be concluded that these seeds have the potential to be used as natural coagulants.

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Coagulation–flocculation treatment of high-strength agro-industrial wastewater using natural Cassia obtusifolia seed gum: Treatment efficiencies and flocs characterization

Cited by 179 publications

References 35 publications

Timecourse Study of Coagulation-Flocculation Process Using Aluminum Sulfate

Timecourse Study of Coagulation-Flocculation Process Using Aluminum Sulfate

Coagulación natural para la descontaminación de efluentes industriales

Exploration of Various Indonesian Indigenous Plants as Natural Coagulants for Synthetic Turbid Water

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