Natural Coagulants for the Treatment of Water and Wastewater: A Futuristic Option for Sustainable Water Clarification

Karnena, Manoj Kumar; Saritha, Vara

doi:10.2174/2405520413999201110094015

Cited by 5 publications

(4 citation statements)

References 122 publications

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“…The adsorption is governed by external factors like temperature, pH, etc. (Zadinelo et al 2018;Karnena and Saritha 2021). Similar results were obtained by Chung (2006), wherein the concentrations of orthophosphate after treatment were found to be acceptable for discharge into natural waters.…”

Section: Discussionmentioning

confidence: 54%

Blend of natural coagulants as a sustainable solution for challenges of pollution from aquaculture wastewater

et al. 2022

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Dependency on sea food has increased owing to its nutrition as well as being complete food. As the production of seafood is enhanced through aquaculture, wastewater release has also improved. The composition of wastewater from aquaculture production has been a concern as it has oil and grease, organic content, etc., which makes its treatment challenging. The present study aims at treating aquaculture wastewater using two natural coagulants—chitin and seeds of Moringa oleifera. The efficiency of the natural coagulants was compared against inorganic chemical coagulant ferric chloride. A blended coagulant with two natural coagulants seeds of Moringa oleifera and chitin was also tested. Jar test apparatus was used in the current experiments, and four coagulant doses were tested against 3 pH ranges, from 6 to 8. The study results showed that the coagulants showed a 30–50% reduction in various physicochemical parameters. Further, the most promising result was obtained with the blended coagulants (di-blend) with 70–81% removal of total nitrogen and total phosphorus and the highest reduction of chloride with 95%. The Fourier-transform infrared spectroscopy showed functionalized groups responsible for coagulation, and X-ray powder diffraction analysis of the blended coagulant indicated the crystallinity and amorphous nature of the compounds. Scanning electron microscope analysis presented a firm and dense structure indicating adsorption of impurities onto the coagulant. Thus, it is evident that natural coagulants can be the solution for the challenges of aquaculture wastewater and specifically the di-blend used in the present is ascertained to be a promising solution.

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Section: Discussionmentioning

confidence: 54%

Blend of natural coagulants as a sustainable solution for challenges of pollution from aquaculture wastewater

et al. 2022

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“…According to Manoj and Vara (2021), coagulants showed their effectiveness in comparison with the available literature. However, the use or acceptance of these coagulants in industrial wastewater treatment is very low.…”

Section: Discussionmentioning

confidence: 99%

Alternative water treatment using organic polymers associated with the solar disinfection method

Lima¹,

Barros²

2021

J. Public Health Epidemiol.

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The objective of this study was to carry out an alternative treatment of low-cost water using organic polymers, Moringa oleifera seed, Opuntia cochenillifera and Cereus jamacaru, associated with the technique of solar water disinfection. From July to November 2020, the samples were collected within the university campus of the Federal University of Recôncavo from Bahia. The count of total coliforms, Escherichia coli and aerobic mesophilic microorganisms were performed. The physicochemical analysis was also carried out (pH, color, turbidity, Dissolved Oxygen and temperature). Analyzes were performed at time 0 (before exposure to the sun) and time 1 (after exposure to the sun). The microbiological results were compared, based on the quality criteria established by the Consolidation Ordinance n. 5, of September 28, 2017 from the Ministry of Health. For the control of total coliforms, there was no significant interaction between the levels observed, in both treatments and times. In collection 1, the M. oleifera, after being exposed to the sun, proved to be more efficient in controlling mesophilic microorganisms. The C. jamacaru stood out with satisfactory performance in the two collections in the control of E. coli. In the physicochemical parameters, O. cochenillifera was the species that showed the best performance in decreasing the color and turbidity. We concluded that the polymers were efficient in the control of microbiological and physicochemical characteristics of the water, however, the levels reached were not sufficient to meet the quality parameters established by the current legislation. Therefore, further studies are recommended to improve the technique.

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“…Karnena et al, 2021 [86] reviewed the NOM characteristics and showed how the cations interact with the natural organic matter. Later Karnena et al, 2022 [87] removed the NOM from the wastewater using the coagulation techniques and stated that scaling up of studies are required for moving these techniques to be adopted by the water industry [88][89][90].…”

Section: Theory Of Coagulationmentioning

confidence: 99%

A Review on techniques used for removal of Natural Organic Matter (NOM) from the water

Raj¹

2022

IJSREM

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The natural organic matter in the water continuously affects the treatment units due to their transformations. The NOM characteristics are complex, and it is challenging to clarify and remove the NOM in water. Due to the modifications of NOM during the disinfections, which results in the formation of by-products, their removal is problematic and causes adverse effects on human health. Several techniques are adopted to remove NOM from the water; one standard method involves coagulation and similar processes. The current review provides insights about the methods available for removing the natural organic matter and highlights the coagulation techniques that are gaining prominence in the current scenarios to remove the NOM from the various sources. Key Words: Coagulants, Coagulation, Natural organic matter, coagulating aids.

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Natural Coagulants for the Treatment of Water and Wastewater: A Futuristic Option for Sustainable Water Clarification

Cited by 5 publications

References 122 publications

Blend of natural coagulants as a sustainable solution for challenges of pollution from aquaculture wastewater

Blend of natural coagulants as a sustainable solution for challenges of pollution from aquaculture wastewater

Alternative water treatment using organic polymers associated with the solar disinfection method

A Review on techniques used for removal of Natural Organic Matter (NOM) from the water

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