Evaluation of structural effects on the flocculation performance of a co-graft starch-based flocculant

Liu, Zhouzhou; Hua, Wei; Li, Aimin; Yang, Hu

doi:10.1016/j.watres.2017.04.032

Cited by 115 publications

(39 citation statements)

References 30 publications

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“…According to the distribution of flocculating activity, the microbial flocculant may be generally classified into two groups: one located on the microbial cell surface, and one in the culture solution (Brostow et al, 2007; Bhattacharya et al, 2017; Liu et al, 2017). In the current study, more than 85% of the flocculating activity was associated with the L1 cells, while less than 15% of the activity was associated with the culture liquid.…”

Section: Discussionmentioning

confidence: 99%

Starch Flocculation by the Sweet Potato Sour Liquid Is Mediated by the Adhesion of Lactic Acid Bacteria to Starch

Zhang

Yang

et al. 2017

Front. Microbiol.

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In the current study, we focused on the mechanism underlying starch flocculation by the sweet potato sour liquid. The traditional microbial techniques and 16S rDNA sequencing revealed that Lactobacillus was dominant flocculating microorganism in sour liquid. In total, 86 bacteria, 20 yeasts, and 10 molds were isolated from the sour liquid and only eight Lactobacillus species exhibited flocculating activity. Lactobacillus paracasei subsp. paracasei L1 strain with a high flocculating activity was isolated and identified, and the mechanism of starch flocculation was examined. L. paracasei subsp. paracasei L1 cells formed chain-like structures on starch granules. Consequently, these cells connected the starch granules to one another, leading to formation of large flocs. The results of various treatments of L1 cells indicated that bacterial surface proteins play a role in flocculation and L1 cells adhered to the surface of starch granules via specific surface proteins. These surface starch-binding proteins were extracted using the guanidine hydrochloride method; 10 proteins were identified by mass spectrometry: three of these proteins were glycolytic enzymes; two were identified as the translation elongation factor Tu; one was a cell wall hydrolase; one was a surface antigen; one was lyzozyme M1; one was a glycoside hydrolase; and one was an uncharacterized proteins. This study will paves the way for future industrial application of the L1 isolate in starch processing and food manufacturing.

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Section: Discussionmentioning

confidence: 99%

Starch Flocculation by the Sweet Potato Sour Liquid Is Mediated by the Adhesion of Lactic Acid Bacteria to Starch

Zhang

Yang

et al. 2017

Front. Microbiol.

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“…In theory, the dissociation temperatures of (-COO -N þ R 4 ) and (-SO 4 2-N þ R 4 ) could be different. The DSC trace of PDM þ HPAM presented that the dissociation temperature of (-COO -N þ R 4 ) was about 96 8C, and the DSC trace of PDM þ SDS presented that dissociation temperature of (-SO 4 2-N þ R 4 ) was about 113 8C (the upward peak indicates the exothermic process). The DSC trace of PDM þ HPAM presented that the dissociation temperature of (-COO -N þ R 4 ) was about 96 8C, and the DSC trace of PDM þ SDS presented that dissociation temperature of (-SO 4 2-N þ R 4 ) was about 113 8C (the upward peak indicates the exothermic process).…”

Section: The Dissolution Mechanism Of the Oil Sludgementioning

confidence: 98%

“…[1,2] Usually, the partially hydrolyzed polyacrylamide (HPAM) is the most used polymer. [4][5][6] After the chemical flocculation, the oil in the OWPF can be separated. For the treatment of OWPF, chemical flocculation using cationic flocculants, such as diallyl dimethyl ammonium chloride homopolymer (PDM), copolymer of acrylamide, and methacryloyloxyethyl trimethyl ammonium chloride, etc.…”

mentioning

confidence: 99%

The dissolution of oil sludge formed by flocculation of oily wastewater produced from polymer flooding

Duan

Meng

Zhao³

et al. 2018

Can J Chem Eng

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During the treatment of oily wastewater produced from polymer flooding (OWPF) by cationic flocculant, oil sludge containing the polymer could be formed. In this paper, the formation mechanism of the oil sludge was discussed for the first time and a novel method was proposed for dissolving the oil sludge. The investigation showed that the polyelectrolyte complex could be formed between the cationic flocculant and the polymer in the OWPF. The polyelectrolyte complex was cross-linked and was insoluble in the water. Oil droplets may be bound by the complex, and the oil sludge was formed. It was found that the oil sludge can be dissolved in sodium dodecyl sulphate (SDS) solution, and the mechanism study showed that SDS can destroy the water-insoluble polyelectrolyte complex. Finally, a water-soluble cationic flocculant-SDS complex was formed.

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“…UV 254 was used to represent the concentration of natural organic matter (NOM) in the micro-polluted water. 28 The turbidity removal efficiency (TRE) was calculated by following formula (1).…”

Section: Flocculation Testmentioning

confidence: 99%

Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO₂ as a photo initiator

et al. 2018

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Evaluation of structural effects on the flocculation performance of a co-graft starch-based flocculant

Cited by 115 publications

References 30 publications

Starch Flocculation by the Sweet Potato Sour Liquid Is Mediated by the Adhesion of Lactic Acid Bacteria to Starch

Starch Flocculation by the Sweet Potato Sour Liquid Is Mediated by the Adhesion of Lactic Acid Bacteria to Starch

The dissolution of oil sludge formed by flocculation of oily wastewater produced from polymer flooding

Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO₂ as a photo initiator

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Evaluation of structural effects on the flocculation performance of a co-graft starch-based flocculant

Cited by 115 publications

References 30 publications

Starch Flocculation by the Sweet Potato Sour Liquid Is Mediated by the Adhesion of Lactic Acid Bacteria to Starch

Starch Flocculation by the Sweet Potato Sour Liquid Is Mediated by the Adhesion of Lactic Acid Bacteria to Starch

The dissolution of oil sludge formed by flocculation of oily wastewater produced from polymer flooding

Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO2 as a photo initiator

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Synthesis of a cationic polyacrylamide by a photocatalytic surface-initiated method and evaluation of its flocculation and dewatering performance: nano-TiO₂ as a photo initiator