Removal of nickel by homogeneous granulation in a fluidized-bed reactor

Ballesteros, Florencio; Salcedo, Angel Frances S.; Vilando, Anabella C.; Huang, Yao Hui; Lu, Ming‐Chun

doi:10.1016/j.chemosphere.2016.08.081

Cited by 43 publications

(8 citation statements)

References 24 publications

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“…In this investigation, wastewater from the manufacture of TFT-LCD was treated in an FBC reactor, successfully recovering crystals of ferrous phosphates (vivianite). Experimental parameters, including pH effluent, Fe/P ratio and the upow velocity (m h À1 ), which were critical in estimating the suitable supersaturation of a FBC process, 27,28 were evaluated based on the criteria of phosphorus removal (PR%) and crystallization ratio (CR%) (or conversion rate, % (ref. 23 and 24)).…”

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Phosphorus recovery as ferrous phosphate (vivianite) from wastewater produced in manufacture of thin film transistor-liquid crystal displays (TFT-LCD) by a fluidized bed crystallizer (FBC)

2017

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Phosphorus recovery as ferrous phosphate (vivianite) from wastewater produced in manufacture of thin film transistor-liquid crystal displays (TFT-LCD) by a fluidized bed crystallizer (FBC) † Ricky Priambodo, a Yu-Jen Shih * b and Yao-Hui Huang * acIn this investigation, fluidized bed crystallization (FBC) is utilized to treat phosphorus wastewater that is produced by the manufacture of thin film transistor-liquid crystal displays (TFT-LCD). TFT-LCD wastewater contains 500 AE 10 ppm phosphorus. The pH and molar ratio of Fe/P for removing phosphorus was initially examined by performing a jar-test. The parameters of the FBC -effluent pH e , Fe/P ratio and the upflow velocity (m h À1 ) -were tested to recover phosphorus from wastewater as ferrous phosphate pellets, characterized using an X-ray diffractometer (XRD) and scanning electron microscopy (SEM), and silica sand was used as the seed material. The experimental results revealed that the control of effluent pH e was an essential parameter in maximizing the phosphorous removal (PR%) and crystallization ratio (CR%). At pH e 5-6, the supersaturation of phosphate precipitation by conditioning the molar ratio of Fe/P to 1.5 and the upflow rate was adjusted within the range of 30.56-68.76 m h À1 in the metastable zone at a cross-section loading of 0.72 kg per P per h per m 2 , leading to a phosphorus removal (PR) of 95% and a crystallization ratio (CR) of 63%. Under optimal hydraulic conditions, the treatment of real wastewater in a FBC process was viable by converting the pollutant into crystals with a high-purity phase of vivianite (Fe 3 (PO 4 ) 2 $8H 2 O).

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Phosphorus recovery as ferrous phosphate (vivianite) from wastewater produced in manufacture of thin film transistor-liquid crystal displays (TFT-LCD) by a fluidized bed crystallizer (FBC)

2017

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“…These radioisotopes can be released into cooling water followed by concentration in various radioactive wastes, especially dry active wastes, mixed cation and anion exchange resins used for purification of the cooling water and other waste streams [4]. Since 59 Ni and 63 Ni are radionuclides with a long half-life (t1/2 63 Ni=76,000, and t1/2 59 Ni= 100 years,) and X-ray and beta emitters, respectively, these radionuclides represent a hazard for biological systems [5]. When nickel ion even in low concentration enters into the living being through various sources (air, water, and food), it readily accumulates in various tissues and causes damage.…”

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A comparative study for the rejection of nickel ions from waste water by PES, fMWCNTs/PES, TiO2/PES and TiO2-fMWCNTs/PES mixed matrix membranes

Yavari

Alipoor

Aroon

et al. 2021

NEP

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In this study, the neat polyethersulfone (PES) membrane and the mixed matrix membranes (MMMs) containing 20 wt. % polyethersulfone (PES) and different amounts of functionalized multi-walled carbon nanotubes (fMWCNTs), TiO2, and TiO2 coated on fMWCNTs were fabricated by wet phase inversion and conventional casting methods. The nickel ions rejection and permeate flux performance were then investigated and compared by these fabricated membranes. The characteristics of the membranes were performed by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and contact angle (CA) measurement. The operational parameters such as polymer concentration, pressure, pH, time and nickel ion concentration for nickel ions rejection and permeability were firstly optimized on the neat PES membrane. The performance of MMMs containing various amounts of nanoparticles was then evaluated and compared under these optimized conditions. The obtained results indicated that the membrane containing 20 wt. % PES, and operational condition like pressure 15bar, low concentration of nickel, time =30min and various amount of pH was the best conditions to achieve the highest rejection percentage of nickel ions and permeate flux. In such operational conditions, PES/fMWCNTs and PES/TiO2 membranes have the highest nickel ion rejection and permeate flux, respectively. Totally the prepared mixed matrix membranes showed that they have higher ability to reject nickel ions from wastewater and a higher permeate flux value compared with the neat PES membrane.

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“…Also, the recyclability of the phosphate sludge is low because the addition of precipitants lowers the purity of MAP. Fluidized bed crystallization (FBC) as an alternative to conventional precipitation has several advantages such as the use of fewer chemicals, production of crystallized pellets, and low water content of recovered solids. , FBC has been applied to treat various wastewaters containing P, ,− K, , N, Bo, Ni, Cu, , Al, , Fe, , Zn, , Ca, , Pb, fluoride, , sulfate, and boric acid . However, FBC requires a seed bed to collect the crystallites, often composed of silica or aluminum oxide which can become impurities in the recovered pellets.…”

Section: Introductionmentioning

confidence: 99%

Applying a Novel Sequential Double-Column Fluidized Bed Crystallization Process to the Recovery of Nitrogen, Phosphorus, and Potassium from Swine Wastewater

et al. 2020

ACS EST Water

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Given the potential shortage of critical nutrients (e.g., nitrogen, phosphorus, and potassium) predicted in the near future, nutrient recovery technologies have attracted wide attention from the scientific community. In this study, a novel sequential double-column fluidized bed homogeneous crystallization (SDC-FBHC) process was developed for the simultaneous recovery of nitrogen (N), phosphorus (P), and potassium (K) from actual swine wastewatera nutrient-rich source. Studied variables included pH, reaction time, ammonia release, Mg:P ratios, and up-flow velocity. Under conditions including pH 8.5–10.5, a Mg:P ratio of 1.4, a P:K ratio of 1.25, an up-flow velocity of 30 m/h, and base on the initial N, P, and K concentrations of 515.6, 95.5, and 334.5 mg/L, respectively, the maximum total removal (TR%) of N, P, and K reached 90.12%, 95.5%, and 62.7%, respectively, and the crystallization ratios (CR%) were 85.6%, 92.4%, and 52.8%, respectively. The sequential double-column fluidized bed homogeneous crystallization products were composed of crystal magnesium ammonia phosphate (MAP, MgNH4·PO4·6H2O, purity > 71.1 ± 2%, size 1.0 mm) and magnesium potassium phosphate phase (MPP, MgKPO4·6H2O, purity > 67.7 ± 3%, size 0.95 mm), which are ready for use as a slow-release fertilizer. The modeling of the minimum fluidization velocity resulted in values of 1.4–1.8 and 1.6–2.0 times that of the up-flow velocity for the effective fluidization of magnesium ammonia phosphate and magnesium potassium phosphate, respectively. The estimated profit for simultaneous recovery of N, P, and K from swine wastewater using the sequential double-column fluidized bed homogeneous crystallization process was 1.324 USD/m3-swine wastewater.

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Removal of nickel by homogeneous granulation in a fluidized-bed reactor

Cited by 43 publications

References 24 publications

Phosphorus recovery as ferrous phosphate (vivianite) from wastewater produced in manufacture of thin film transistor-liquid crystal displays (TFT-LCD) by a fluidized bed crystallizer (FBC)

Phosphorus recovery as ferrous phosphate (vivianite) from wastewater produced in manufacture of thin film transistor-liquid crystal displays (TFT-LCD) by a fluidized bed crystallizer (FBC)

A comparative study for the rejection of nickel ions from waste water by PES, fMWCNTs/PES, TiO2/PES and TiO2-fMWCNTs/PES mixed matrix membranes

Applying a Novel Sequential Double-Column Fluidized Bed Crystallization Process to the Recovery of Nitrogen, Phosphorus, and Potassium from Swine Wastewater

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