Application of ceramic membranes for microalgal biomass accumulation and recovery of the permeate to be reused in algae cultivation

Nędzarek, Arkadiusz; Drost, Arkadiusz; Harasimiuk, Filip; Tórz, Agnieszka; Bonisławska, Małgorzata

doi:10.1016/j.jphotobiol.2015.09.009

Cited by 14 publications

(16 citation statements)

References 19 publications

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“…More details regarding the experimental set-up can be found in [ 60 ]. After each filtration, the membrane was chemically cleaned according to the manufacturer’s recommendations, described by Nędzarek et al [ 30 ] and Bonisławska et al [ 61 ]: washing with 2% NaOH solution (T = 360 K, t = 40 min), rinsing with ultra-pure water, washing with 0.5% HNO 3 solution (T = 320 K, t = 30 min), and, finally, rinsing three times with ultra-pure water. Chemical washing resulted in a performance characteristic for a clean membrane.…”

Section: Methodsmentioning

confidence: 99%

“…With the growing interest in NF as a separation technique for a wide range of applications, even under harsh conditions, ZrO 2 or TiO 2 membranes are increasingly preferred due to their high chemical, thermal and mechanical resistance [ 27 , 28 ] and easy interaction between metallic species and ceramic materials [ 25 ]. Therefore, the use of ceramic membranes in aggressive systems, including extreme pH values, is recommended [ 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of pH on Total Volume Membrane Charge Density in the Nanofiltration of Aqueous Solutions of Nitrate Salts of Heavy Metals

et al. 2020

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The separation efficiencies of aqueous solutions containing nitric salts of Zn, Cu, Fe or Pb at various pH in process of nanofiltration have been investigated experimentally. These results were used to obtain the total volume membrane charge densities, through mathematical modelling based on the Donnan–Steric partitioning Model. The experimentally obtained retention values of individual heavy metal ions varied between 36% (Zn2+ at pH = 2), 57% (Pb2+ at pH = 2), 80% (Fe3+ at pH = 9), and up to 97% (Cu2+ at pH = 9). The mathematical modelling allowed for fitting the total volume membrane charge density (Xd), which yielded values ranging from −451.90 to +900.16 mol/m3 for different non-symmetric ions. This study presents the application of nanofiltration (NF) modelling, including a consideration of each ion present in the NF system—even those originating from solutions used to adjust the pH values of the feed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of pH on Total Volume Membrane Charge Density in the Nanofiltration of Aqueous Solutions of Nitrate Salts of Heavy Metals

et al. 2020

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“…To achieve a higher rate of reduction in N and P, the aquaculture effluent from RAS purification systems could be additionally subjected to a biological purification stage, e.g. photobioreactors for microalgae cultivation (as tested by Nędzarek, Drost, Harasimiuk, Tórz, & Bonisławska, 2015b) or membrane biological reactors (MBR) (Sharrer et al, 2007). However, these methods require further comprehensive investigation.…”

Section: Con Clus Ionsmentioning

confidence: 99%

Assessment of the use of precipitating agents and ceramic membranes for treatment of effluents with high concentrations of nitrogen and phosphorus from recirculating aquaculture systems

2019

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Following the culturing of post‐juvenile African catfish, wastewaters were purified using single and integrated processes. Iron coagulant (IC), aluminium coagulant (AC), lanthanum modified bentonite (LMB) and ceramic membranes (NF – nanofiltration) were each tested in single processes, while the combination of IC + NF and AC + NF were used in the integrated process tests. Among the single processes, membrane filtration was the most effective in purifying the aquaculture effluent. The total suspended solids (TSS) were removed entirely and there was a near‐complete removal of turbidity (99.2%), as well as effective removal of Al and Fe (80.8% and 67.4% respectively). Precipitating agents overall removed TSS most faithfully, from 37.5% removal with AC, through 50.2% with IC, to 62.3% with LMB. Using integrated processes, the highest removal efficacy was recorded for TSS (100%) and turbidity (99.7% – IC + NF; 99.9% – AC + NF). Additionally, integrated processes attained a 96.8%–98.4% removal of NO2‐‐N. This study confirms the possibility of using IC, AC and LMB in chemical purification of effluents from recirculating aquaculture systems (RAS). However, due to their low removal efficacy for nitrogen and phosphorus, it is preferable to use NF or integrated processes – membrane filtration combined with chemical precipitation, methods which proved to be most effective for water purification in RAS.

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“…Particularly, the ceramic membrane (characterized as microfiltration or ultrafiltration according to its pore size and molecular cut off) has the advantages of high surface hydrophilicity, good mechanical and chemical stability, longer lifespan, being easier to be cleaned by mechanical washing and integrating with other treatment processes compared with conventional polymeric membranes [6]. It has been widely applied in drinking water purification [7], wastewater treatment processes [8][9][10][11][12] and microalgae production [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Membrane Fouling and Performance of Flat Ceramic Membranes in the Application of Drinking Water Purification

Meng

Yao²,

Qiu³

et al. 2019

Water

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Membrane technologies have been widely applied in surface water treatment for drinking water purification. The main obstacles to the large scale application of membranes include membrane fouling, energy consumption and high investment. This study systematically investigated the performance of a hybrid system including in-situ coagulation and membrane module. The key parameters of a membrane system, including initial flux, operation mode (intermediate or continuous, time intervals, backwashing and aeration) was comprehensively investigated. In addition, the treatment performance in terms of turbidity, organic matter removal, membrane fouling and cleaning, and the effect of coagulants, were also studied. It was found that flat ceramic membranes with in-situ coagulation for surface water treatment performed much better without aeration and frequent backwashing, which gave interesting and important implications for future applications of a flat ceramic membrane, especially in drinking water purification. The hybrid system can achieve a high-water flux of 150 L/m2·h (LMH) for 8 h operation without aeration and backwash. The removal of turbidity, UV254 and COD can achieve 99%, 85% and 81%, respectively. The cake layer on the membrane surface formed from the coagulation flocs turned out to prevent the membrane to be exposed to organic pollutant immediately which minimized the fouling problem. In addition, the fouling layer on the membrane surface can be easily cleaned by air scouring and backwash at the end of experiments, with a water flux recovery of higher than 90%. These results in this study provided an alternative strategy for membrane fouling control and energy conservation.

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Application of ceramic membranes for microalgal biomass accumulation and recovery of the permeate to be reused in algae cultivation

Cited by 14 publications

References 19 publications

Effect of pH on Total Volume Membrane Charge Density in the Nanofiltration of Aqueous Solutions of Nitrate Salts of Heavy Metals

Effect of pH on Total Volume Membrane Charge Density in the Nanofiltration of Aqueous Solutions of Nitrate Salts of Heavy Metals

Assessment of the use of precipitating agents and ceramic membranes for treatment of effluents with high concentrations of nitrogen and phosphorus from recirculating aquaculture systems

Membrane Fouling and Performance of Flat Ceramic Membranes in the Application of Drinking Water Purification

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