Dosage effect of cationic polymers on the flocculation efficiency of the marine microalga Neochloris oleoabundans

Lam, G.P. ‘t; Zegeye, E.K.; Vermuë, M.H.; Kleinegris, Dorinde M.M.; Eppink, M.H.M.; Wijffels, René H.; Olivieri, Giuseppe

doi:10.1016/j.biortech.2015.09.097

Cited by 22 publications

(2 citation statements)

References 28 publications

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“…However, no significant improvement was observed when the FeCl3 dosage was further increased from 9 to 12 g/L. It might indicate that the extra amount of flocculants could lead to the inhibition of further sedimentation of flocs [23]. The addition of PAC flocculant at a dosage of 6 to 24 g/L showed limited effect on SS removal (~2.1%) in the digested chicken slurry.…”

Section: Effect Of Flocculation Treatments On Membrane Filterabilitymentioning

confidence: 92%

Effect of flocculation pre-treatment on membrane nutrient recovery of digested chicken slurry: Mitigating suspended solids and retaining nutrients

Luo

Lyu

Muhmood

et al. 2018

Chemical Engineering Journal

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Use of membrane filtration is attracting increasing attention for nutrient recovery from anaerobically digested slurry. However, the challenge is to reduce membrane fouling by effective solids mitigation, while maintaining valuable nutrients. In this study, the effects of several flocculation pre-treatments using polyaluminium chloride, iron chloride, and flocculant aid at various dosages were investigated. The results showed significant improvement in membrane flux from 0.8 to 27.6 mL/m 2 /s due to solid 2 migration (up to 75% removal). Significant loss of PO4 3− -P (99%) and humic acids (40-80 %) was observed. However, the content of NH4 + -N and indoleacetic acids was largely maintained in the treated slurry. Moreover, toxic metals were significantly removed through flocculation, making the final product risk-free of heavy metals for agricultural application.

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Section: Effect Of Flocculation Treatments On Membrane Filterabilitymentioning

confidence: 92%

Effect of flocculation pre-treatment on membrane nutrient recovery of digested chicken slurry: Mitigating suspended solids and retaining nutrients

Luo

Lyu

Muhmood

et al. 2018

Chemical Engineering Journal

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“…Generally, insufficient or excessive dosage of the flocculant influences the flocculation performance; hence, it is crucial to evaluate this parameter on kaolin wastewater efficiency. As shown in Figure a(i), especially at a lower dosage (1 mL/50 mL), the flocculation performance of PAFSi is greater than that of polyaluminum chloride (PAC) and polyferric sulfate (PFS) because PAFSi possesses higher transmittance and removal rates of impurities at the same dosage .…”

Section: Resultsmentioning

confidence: 99%

High-Performance Flocculants for Purification: Solving the Problem of Waste Incineration Bottom Ash and Unpurified Water

Luo

Wang

et al. 2020

ACS Omega

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The silicon−aluminum−iron flocculant (PAFSi) combines the most abundant resources of waste incineration bottom ash and unpurified water, being regarded as one of the most promising approaches toward water purification. Herein, in this research, waste incineration bottom ash was employed to produce a cost-effective and highly efficient flocculant. PAFSi with a particle size of 214 nm and a zeta potential of 8.63 mV reached the optimum performance using a dosage of 2 mL/50 mL at pH from 8 to 11. The results with the copolymer exhibited the following: (1) a good flocculation efficiency over a wide pH range, (2) superior flocculation performance compared to those of polyaluminum chloride and polyferric sulfate, (3) three-dimensional branching structure of PAFSi micelles with a high aggregation degree, (4) charge neutralization and bridging as the main flocculation mechanism, and (5) recycling the floc. Thus, this work provides an attractive solution to the pressing global clean water shortage problem.

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From Current Algae Products to Future Biorefinery Practices: A Review

Eppink

Olivieri

Reith

et al. 2017

Advances in Biochemical Engineering/Biotechnology

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Microalgae are considered to be one of the most promising next generation bio-based/food feedstocks with a unique lipid composition, high protein content, and an almost unlimited amount of other bio-active molecules. High-value components such as the soluble proteins, (poly) unsaturated fatty acids, pigments, and carbohydrates can be used as an important ingredient for several markets, such as the food/feed/chemical/cosmetics and health industries. Although cultivation costs have decreased significantly in the last few decades, large microalgae production processes become economically viable if all complex compounds are optimally valorized in their functional state. To isolate these functional compounds from the biomass, cost-effective, mild, and energy-efficient biorefinery techniques need to be developed and applied. In this review we describe current microalgae biorefinery strategies and the derived products, followed by new technological developments and an outlook toward future products and the biorefinery philosophy.

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Dosage effect of cationic polymers on the flocculation efficiency of the marine microalga Neochloris oleoabundans

Abstract: Highlights• Biomass recoveries up to 99 ± 0.8 % were achieved with 20 ppm of flocculant

Cited by 22 publications

References 28 publications

Effect of flocculation pre-treatment on membrane nutrient recovery of digested chicken slurry: Mitigating suspended solids and retaining nutrients

Effect of flocculation pre-treatment on membrane nutrient recovery of digested chicken slurry: Mitigating suspended solids and retaining nutrients

High-Performance Flocculants for Purification: Solving the Problem of Waste Incineration Bottom Ash and Unpurified Water

From Current Algae Products to Future Biorefinery Practices: A Review

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