Impact of Sludge Floc Size and Water Composition on Dewaterability

Fitria, Dewi; Scholz, Miklas; Swift, Gareth M.; Hutchinson, Simon M.

doi:10.1002/ceat.201300378

Cited by 18 publications

(14 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 also showed that leucaena seed kernel extract formed floc faster than alum, as much larger floc size was obtained at a same observation time. Larger floc was desired as it eases the removal from water (Fitria et al 2014). Effect of coagulant dosage at the highest removal was further observed.…”

Section: Comparison Of Leucaena Seed Kernel Extract Coagulating Perfomentioning

confidence: 90%

Removal of Congo red aqueous solution using Leucaena leucocephala seed’s extract as natural coagulant

et al. 2019

View full text Add to dashboard Cite

Coagulation is a well-known technology applied in water and wastewater treatment. Inorganic salts, such as alum, ferrous sulfate, and polyaluminum chloride, are usually used. It is widely known that utilization of these inorganic coagulants poses several disadvantages, such as high coagulant cost and high sludge volume that increase water treatment expenses. The use of alum also poses health risk to human as it may cause degenerative diseases. In order to minimize these disadvantages, the use of various coagulants from natural resources has been recently proposed. In this research, study was performed on the extraction and use of a potential natural coagulant (Leucaena leucocephala) seed kernel as natural coagulant. Leucaena seed kernel was extracted at various NaCl concentrations (0-5 mol L −1). Extract with highest protein content obtained at NaCl concentration of 3 mol L −1 was further used to treat a synthetic wastewater model substance (Congo red solution) at various pH (2-10) and dosage (2-40 mL L −1). This natural coagulant successfully removed 99.9% of the color at pH 3 and dosage 10 mL L −1 , with only half sludge volume discharged when compared to alum. The result suggests that leucaena is a promising natural coagulant for water and wastewater treatment.

show abstract

Section: Comparison Of Leucaena Seed Kernel Extract Coagulating Perfomentioning

confidence: 90%

Removal of Congo red aqueous solution using Leucaena leucocephala seed’s extract as natural coagulant

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The reason to this is most probably caused by charge destabilization of the suspended solids in the wastewater. Similar study performed by Fitria et al, [16] also explored the temperature effects at 20°C and 26°C using Moringa oleifera as coagulant and has found it works better at 26°C rather than at 20°C. It was most probably due to Moringa oleifera proteins being more active at higher temperatures.…”

Section: Temperaturementioning

confidence: 53%

Moringa oleifera as coagulant used in water purification process for consumption

Tunggolou¹,

Payus²

2017

Earth sci. Pak.

View full text Add to dashboard Cite

Water for consumption purpose needs to be treated to meet the quality guidelines of 5 Nephelometric Turbidity Unit (NTU) according to World Health Organization. The main objective of this study is to compare Moringa Oleifera Lam. to that of aluminum sulphate in terms of treatment efficiency. The method is carried out using Jar Tests and raw data are analyzed using Microsoft Excel Office Professional Plus 2013 and Pearson Correlation. Results shown proved the ability of Morina oleifera to remove the total suspended solids in the water from 35.9 ± 1.65 NTU to 3.17 ± 0.3 NTU at optimum dosage of 15 mg/l while aluminum sulphate to 7.26 ± 2.13 NTU at dosage of 55 mg/l. The treatment efficiency of Moringa oleifera is also higher at 91.17% and aluminum sulphate is at 78.72%. Moringa oleifera resist changes in pH as final reading of the water sample increases from 5.67 ± 0.23 to 6.05 ± 0.03 while aluminum sulphate decreases to 3.43 ± 0.05 which indicates elevated acidity level. Conductivity reading of Moringa oleifera is constant at range of 113.33 ± 5.77 ևS while aluminum sulphate increased drastically from initial reading of 86.67 ± 5.77 ևS to 1120 ± 10.0 ևS. The final temperature is still at normal room temperature range after the addition of both coagulants at 22.07 °C to 24.97 °C. As a conclusion, a cheaper and safer coagulant such as Moringa oleifera as compared to aluminum sulphate can be established.

show abstract

“…Large particles with little strength disintegrate easily and they also show low dewaterability. In contrast, small flocs are hard to destroy [25]. Although aging of the sludge further enhanced floc formation, increase in the large particle fraction did not contribute to better dewaterability.…”

Section: Particle Size Distribution Of the Sludgementioning

confidence: 89%

Investigation of Mineral-Processing Wastewater Recycling Processes: A Pilot Study

Park

Han

2018

Sustainability

View full text Add to dashboard Cite

Mineral processing requires large amounts of water, but, often in the remote locations of many mines, sufficient fresh water frequently cannot be supplied. Therefore, recycling of water is important in mineral processing and enhancing the efficiency of the liquid-solid separation and dewatering steps in mineral processing wastewater treatment is critical. The objectives of the study were to evaluate the effect of anionic flocculant dosage and sludge recycling (SR) on solid removal and sludge dewaterability. Different combinations of the flocculant dosage with and without SR were applied in a mineral-processing wastewater treatment pilot plant. Increasing the amount of flocculant dose of 1.1% v/v (flocculant solution to wastewater) did not significantly decrease the turbidity of the treated water, while the combination of a flocculant with SR increased the zeta potential. Increasing flocculant dose adversely affected dewaterability, although the dewaterability of the 0.6% v/v flocculant-treated sludge significantly increased after aging of the sludge. Sludge recycling was effective for increasing the dewaterability, and a flocculant dose of 1.1% v/v with SR led to formation of large flocs that were stable during aging and sonication.

show abstract

Impact of Sludge Floc Size and Water Composition on Dewaterability

Cited by 18 publications

References 40 publications

Removal of Congo red aqueous solution using Leucaena leucocephala seed’s extract as natural coagulant

Removal of Congo red aqueous solution using Leucaena leucocephala seed’s extract as natural coagulant

Moringa oleifera as coagulant used in water purification process for consumption

Investigation of Mineral-Processing Wastewater Recycling Processes: A Pilot Study

Contact Info

Product

Resources

About