Particle size distribution and removal by a chemical-biological flocculation process

Zhang, Zhibin; Zhao, Jingang; Xia, Siqing; Liu, Changqing; Kang, Xingsheng

doi:10.1016/s1001-0742(07)60093-x

Cited by 23 publications

(10 citation statements)

References 11 publications

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“…The particle counting method was also used to analyze the filtration precision of the BDDM besides the turbidity parameter, which is a valuable parameter for evaluaflng solid-liquor separation (Yan et al 2007;Zhang et al 2007). Characteristics of particles have been extensively studied (Buffle & Leppard 1995a, b;Zhang et al 2007).…”

Section: Particle Interception Of Bddmmentioning

confidence: 99%

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Gravity filtration performances of the bio-diatomite dynamic membrane reactor for slightly polluted surface water purification

Chu

Dong

Zhang

et al. 2012

Water Science and Technology

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A bio-diatomite dynamic membrane (BDDM) reactor for surface water treatment under a water head of 30, 40, 50, 60 and 70 cm, respectively, was investigated, which was very effective for pollutants removal. The water head exerted strong influences on filtration flux of BDDM during the precoating process, as well as on the formation of BDDM and turbidity variations. A high filtration flux (approximately 200-300 L/m2 h) could be achieved in the long filtration times of BDDM with a stable effluent turbidity of approximately 0.11-0.25 NTU. The BDDM could remove particles larger than 25 μm completely. The adopted sintered diatomite mainly consisted of macro pores, which were beneficial for improving the filtration flux of BDDM. During the backwash stage, the BDDM could be removed completely by the air backwash.

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Section: Particle Interception Of Bddmmentioning

confidence: 99%

“…Characteristics of particles have been extensively studied (Buffle & Leppard 1995a, b;Zhang et al 2007). Particle counflng is suitable for detecflng the number of flne particles in post-filtration waters (Yan et al 2007).…”

Section: Particle Interception Of Bddmmentioning

confidence: 99%

Gravity filtration performances of the bio-diatomite dynamic membrane reactor for slightly polluted surface water purification

Chu

Dong

Zhang

et al. 2012

Water Science and Technology

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“…Particle size characterization can be accomplished using a Coulter counter (Zhang et al, 2007) or by the electrical sensing zone method (Gibbs, 1982). However, both analyses require withdrawal of samples from a suspension that may disrupt fragile flocs (Chakraborti et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Flocs and Floc Size Distributions Using Image Analysis

Sun

Weber‐Shirk

Lion

2016

Environmental Engineering Science

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A nonintrusive digital imaging process was developed to study particle size distributions created through flocculation and sedimentation. Quantification of particle size distributions under different operating conditions can be of use in the understanding of aggregation mechanisms. This process was calibrated by measuring standardized polystyrene particles of known size and was utilized to count and measure individual kaolin clay particles as well as aggregates formed by coagulation with polyaluminum chloride and flocculation. Identification of out-of-focus flocs was automated with LabVIEW and used to remove them from the database that was analyzed. The particle diameter of the test suspension of kaolinite clay was measured to be 7.7 -3.8 lm and a linear relationship was obtained between turbidity and the concentration of clay particles determined by imaging. The analysis technique was applied to characterize flocs and floc particle size distribution as a function of coagulant dose. Removal of flocs by sedimentation was characterized by imaging, and the negative logarithm of the fraction of turbidity remaining after settling had a linear relationship with the logarithm of aluminum dose. The maximum floc size observed in the settled water was less than 120 lm, which was in accordance with the value predicted by a model for the capture velocity of the experimental tube settler of 0.21 mm/s.

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“…Several studies have been conducted to study the effect of different coagulants on the removal of suspended particles during the filtration process. The type and dose of the coagulant applied was selected based on the characteristics of the water to be treated and the targeted quality of the effluent [9,10]. The performance of a dual media filter coupled with granular activated carbon was compared with the performance of the same treatment configuration with the addition of a dosage of an organic coagulant [1].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of multi-media filter performance using talc as a new filter aid material: Mechanistic study

El-Faki

Hawari

Mulligan

2015

Journal of Industrial and Engineering Chemistry

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Particle size distribution and removal by a chemical-biological flocculation process

Cited by 23 publications

References 11 publications

Gravity filtration performances of the bio-diatomite dynamic membrane reactor for slightly polluted surface water purification

Gravity filtration performances of the bio-diatomite dynamic membrane reactor for slightly polluted surface water purification

Characterization of Flocs and Floc Size Distributions Using Image Analysis

Enhancement of multi-media filter performance using talc as a new filter aid material: Mechanistic study

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