Remove of phosphorous and turbidity of swine wastewater using electrocoagulation under continuous flow

Mores, Rúbia; Treichel, Helen; Zakrzevski, Claudio Augusto; Kunz, Airton; Steffens, Juliana; Dallago, Rogério Marcos

doi:10.1016/j.seppur.2016.07.016

Cited by 67 publications

(20 citation statements)

References 22 publications

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“…Several physicochemical and biological technologies have been used to treat swine wastewater, namely, electrocoagulation ( Mores et al, 2016 ), electrochemical ( Huang et al, 2016 , 2018 ) and biological methods such as anaerobic-aerobic ( Aziza et al, 2019 ; Shoukat et al, 2019 ), moving bed biofilm reactor (MBBR; Yang et al, 2015 ), and membrane bioreactor (MBR; Guglielmi and Andreottola, 2011 ; Guadie et al, 2014 ). However, these technologies have limitations such as high initial investment cost, consumption of large quantities of chemicals, requiring large footprint, complex operation and control of parameters, and low nitrogen and phosphorous removal efficiencies.…”

Section: Introductionmentioning

confidence: 99%

Removal of Nutrients From Anaerobically Digested Swine Wastewater Using an Intermittent Cycle Extended Aeration System

2020

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Swine wastewater contains high concentrations of organic compounds, nutrients (nitrogen and phosphorus), heavy metals, and residual antibiotics, amongst others, that have negative impacts on the water environment. The main aim of this work was to remove nutrients from anaerobically digested swine wastewater using an intermittent cycle extended aeration system (ICEAS). The effects of operational parameters such as cycle time, organic loading rate, C/N ratio, and aeration/mixing ratio on the pollutant removal efficiencies of ICEAS were studied and compared with the performance of a conventional sequencing batch reactor (SBR). The following optimal conditions were obtained: cycle time, 6 h; organic loading rate, 0.86 kg COD m −3 day −1 ; C/N ratio, 2.49-2.82; and aeration/ mixing ratio, 1.57. The pH was maintained in the range of 6.0-8.0. The total organic carbon (TOC), total nitrogen (TN), ammonium (NH 4 +), total phosphorus (TP), and color removal efficiencies of ICEAS were higher than those of the conventional SBR, with removal

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Section: Introductionmentioning

confidence: 99%

Removal of Nutrients From Anaerobically Digested Swine Wastewater Using an Intermittent Cycle Extended Aeration System

2020

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“…Electro-flocculation is an electrochemical technique for pollutant removal, which is based on the in-situ generation of flocculants during metal electrolysis (Vasudevan et al, 2008). Owning to the advantages of low cost, high efficiency and easy operation, electro-flocculation has been widely applied in wastewater treatment to remove phosphorus (Mores et al, 2016), dyes (Mollah et al, 2010), fluoride (Hu et al, 2005), organic matter (Asselin et al, 2008) and heavy metals (Hanay and Hasar, 2011). Charge neutralization is identified as the main mechanism of electro-flocculation, which creates the sorption affinity for negatively charged pollutants (Vasudevan et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Synergy of flocculation and flotation for microalgae harvesting using aluminium electrolysis

Shi

Zhu

Chen

et al. 2017

Bioresource Technology

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Microalgae are often used as feedstock for renewable biofuel production and as pollutant up-takers for wastewater treatment; however, biomass harvesting still remains a challenge in field applications. In this study, electro-flocculation using aluminium electrolysis was tested as a method to collect Chlorella vulgaris. The electrolysis products were positively charged over a wide pH range below 9.5, which gave them a flocculation potential for negatively charged microalgae. As flocculants were in-situ generated and gradually released, microalgae flocs formed in a snowballing mode, resulting in the compaction of large flocs. When higher current density was applied, microalgae could be harvested more rapidly, although there was a trade-off between a higher energy use and more residual aluminium in the culture medium. Benefits of this flocculation method are twofold: the phosphate decrease in post-harvesting could improve nutrient removal in microalgae based wastewater treatment, while the ammonium increase may favor microalgae recovery for medium recycling.

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“…Water treatment has always been a major problem in environmental governance. The purification of high-turbidity water caused by industrialization and urbanization is one of the serious problems in water treatment [1,2]. Various technologies, such as adsorption, flocculation, electrochemical oxidation, and biotechnology, have been researched and applied in water treatment [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Flocculation of a High-Turbidity Kaolin Suspension Using Hydrophobic Modified Quaternary Ammonium Salt Polyacrylamide

Xia

et al. 2019

Processes

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In this work, a novel cationic polyacrylamide (PAMD) was synthesized by acrylamide (AM) diallyl dimethyl ammonium chloride (DMD) and dodecyl polyglucoside (DPL) under low-pressure ultraviolet (UV) initiation. The intrinsic viscosity and cationic degree of PAMD were optimized in copolymerization. The optimum synthesis conditions that affect polymerization were determined to be solid content 30%, DPL content 25%, DMD content 30%, illumination time 135 min, and pH 9. The flocculation performance of flocculant PAMD with a high cationic degree was investigated in the purification of high-turbidity water. The flocculation mechanism was correspondingly studied and summarized based on Fourier transform-infrared (FTIR) analysis. Finally, the results of an experimental simulation using the response surface method show that 98.9% supernatant transmittance was achieved under dosage 4 mg/L, fast stirring time 20 min, pH 7, and stirring speed 320 rpm.

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Remove of phosphorous and turbidity of swine wastewater using electrocoagulation under continuous flow

Cited by 67 publications

References 22 publications

Removal of Nutrients From Anaerobically Digested Swine Wastewater Using an Intermittent Cycle Extended Aeration System

Removal of Nutrients From Anaerobically Digested Swine Wastewater Using an Intermittent Cycle Extended Aeration System

Synergy of flocculation and flotation for microalgae harvesting using aluminium electrolysis

Flocculation of a High-Turbidity Kaolin Suspension Using Hydrophobic Modified Quaternary Ammonium Salt Polyacrylamide

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