A tannin-based agent for coagulation and flocculation of municipal wastewater: Chemical composition, performance assessment compared to Polyaluminum chloride, and application in a pilot plant

Hameed, Yasir Talib; Idris, Azni; Hussain, Siti Aslina; Abdullah, Norhafizah

doi:10.1016/j.jenvman.2016.10.033

Cited by 107 publications

(56 citation statements)

References 29 publications

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“…Coagulation is the process of destabilizing (reducing the charge) particles, while the coagulant is the material used to accomplish coagulation [1,11]. Flocculation is applied on the process of collision of particles to form a bigger size particle which is easy to be removed by a simple technique like sedimentation or filtration [12].…”

Section: Coagulant and The Coagulation Processmentioning

confidence: 99%

“…Most urban communities particularly in developing countries including our country, Ethiopia, collect water from a natural water body in the catchment, whether a stream, a river, or an underground aquifer which is not clean [2,5,11]. Currently, the need of clean water for everyday activities inspires many researchers to render the coagulation and flocculation processes more efficient [5].…”

Section: Coagulant and The Coagulation Processmentioning

confidence: 99%

“…Finally, physicochemical parameters (pH, salinity, turbidity, conductivity, DO, TDS, and chlorophyll A) were measured and compared with pretreated and posttreated coagulants. Coagulation activity was calculated using the following equation [11]:…”

Section: Coagulation Activity Using Jar Testmentioning

confidence: 99%

“…The samples were allowed to settle for 60 min or more and thereafter the absorbances were measured at 500 nm using UV-visible spectrophotometer. The percentage of coagulation activity of cactus was calculated using the following equation [11]:…”

Section: Coagulation Activity Using Uv Spectrometermentioning

confidence: 99%

“…Therefore, the coagulation activity of cactus powder was also determined using UV-visible spectrophotometer. The percentage of coagulation activity of cactus powder was calculated using the following formula [11]. As shown in Figure 9, the percentage removal of turbidity from turbid water sample is increased initially with the increasing of cactus powder dose, but, after a certain dose, a decreasing trend in removal of turbidity is seen with an increment of cactus powder.…”

Section: Coagulation Activity Of Cactus Powder Using Uv Spectrometer mentioning

confidence: 99%

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Investigation of Coagulation Activity of Cactus Powder in Water Treatment

Beyene

Derbe

Dirersa

2016

Journal of Applied Chemistry

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This paper is focused on the comparative study of cactus powder, Alum, and their combination of physiochemical analyses of water sample such as TDS, pH, conductivity, salinity, and turbidity using jar test. The result indicated that percentage removal of turbidity from turbid water sample increased from 23.9% to 54% and 28.46% to 58.2% as dose increased from 0.50 to 3.50 g for both cactus powder and Alum, respectively. Cactus powder also has a marginal effect on pH value (7.33 at 0.50 g, 7.49 at 1.50 g, 7.57 at 2.50 g, and 7.57 at 3.50 g) as compared to the usage of chemical coagulants (Alum). The salinity was increased from 0.4% to 0.69 % and 0.39% to 0.98% as the dose of cactus powder and Alum increased from 0.50 g to 3.50 g, respectively. The result revealed that cactus powder is more effective in pH upholding, TDS maintenance, and salinity removal than Alum, but their combination is the most effective in terms of turbidity removal, reduction of salinity, reduction of conductivity, and reduction of TDS and has a marginal effect on dissolved oxygen (DO) value. In conclusion, the combination of Alum and cactus powder is more effective for turbidity removal, salinity removal, and pH and conductivity upholding than either of them used individually.

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Section: Coagulant and The Coagulation Processmentioning

confidence: 99%

Section: Coagulant and The Coagulation Processmentioning

confidence: 99%

Section: Coagulation Activity Using Jar Testmentioning

confidence: 99%

Section: Coagulation Activity Using Uv Spectrometermentioning

confidence: 99%

Section: Coagulation Activity Of Cactus Powder Using Uv Spectrometer mentioning

confidence: 99%

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Investigation of Coagulation Activity of Cactus Powder in Water Treatment

Beyene

Derbe

Dirersa

2016

Journal of Applied Chemistry

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Life‐cycle assessment of the production of cationized tannins from Norway spruce bark as flocculants in wastewater treatment

Carlqvist¹,

Arshadi²,

Mossing³

et al. 2020

Biofuels Bioprod Bioref

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It will be necessary to make efficient use of our resources if our society is to be converted into a bio-based economy. Every year large side streams of bark are produced in sawmills and pulp mills. In addition to utilizing the bark for heat and electricity production, as happens today, high-value chemical components could be extracted prior to energy conversion. These components include tannins. Cationized tannins have already been indicated as promising renewable flocculants in wastewater treatment. However, today's industrial production of tannins uses species from subtropical or temperate climates, and there has so far been little attention to the use of tannins from Norway spruce (Picea abies), an important species in forestry in the subarctic climate. The present life-cycle assessment (LCA) was undertaken to understand the environmental performance of the production of cationized tannins from the bark of Norway spruce and how the environmental impact is distributed along the production system. This work was connected to the Interreg Botnia-Atlantica TanWat research project, which studies the production and use of cationized tannins from Norway spruce for wastewater treatment at a pilot scale. The present LCA shows that the main environmental impact stems from the reagents used in the cationization step. The purification step could also be a significant issue depending on the possibility of reusing the eluent (ethanol) and the lifetime of the resin. The importance of running the processes with as concentrated streams as possible to minimize the need of process water and energy was also confirmed

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Nature‐based coagulants for drinking water treatment: An ecotoxicological overview

Bouaidi

Libralato

Tazart

et al. 2022

Water Environment Research

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The intensive human activities extensively contaminated water sources making its treatment a problem of paramount importance, especially with the increasing of global population and water scarcity. The application of natural coagulants has become a promising and environmentally friendly alternative to conventional ones. This study was aimed at evaluating the efficiency of four plant extracts namely Agave americana, Carpobrotus acinaciformis, Austrocylindropuntia subulate, and Senicio anteuphorbium as natural coagulants to remove Microcystis aeruginosa cyanobacterium from water. The effects of pH (4, 5, 6, 7, 8 9, and 10) and coagulant dose (5, 10, 15, 20, 25, and 30 mg/L) on the coagulation efficiency were investigated. Results showed that plant‐based extracts exhibited high coagulant abilities significantly contributing to the removal of M. aeruginosa cells up to 80% on a case‐by‐case basis. The ecotoxicity (Daphnia magna, Aliivibrio fischeri, Raphidocelis subcapitata, and Sorghum saccharatum) was absent or presented very slight acute toxicity up to 12.5 mg/L being S. anteuphorbium the least toxic. Practitioner Points Nature‐based plant extracts showed removal rates up to 80%. Lower pH and A. subulate and S. anteuphorbium were the most efficient coagulants Toxicity effects were plant extracts‐based and dose function. A. subulate and S. anteuphorbium were the least toxic extracts.

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A tannin-based agent for coagulation and flocculation of municipal wastewater: Chemical composition, performance assessment compared to Polyaluminum chloride, and application in a pilot plant

Cited by 107 publications

References 29 publications

Investigation of Coagulation Activity of Cactus Powder in Water Treatment

Investigation of Coagulation Activity of Cactus Powder in Water Treatment

Life‐cycle assessment of the production of cationized tannins from Norway spruce bark as flocculants in wastewater treatment

Nature‐based coagulants for drinking water treatment: An ecotoxicological overview

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