DETERMINAÇÃO DO NÚMERO DE CICLOS DE REUSO DO ADSORVENTE CINZA DE CASCA DE ARROZ NO TRATAMENTO DE UM BANHO RESIDUAL DE TINGIMENTO TÊXTIL

This study evaluated a continuous flow system using rice husk ash as an adsorbent to treat textile bath dyeing residual. The system consisted in recirculating the effluent in a burette containing the adsorbent. This procedure was performed in five cycles of reuse of the adsorbent. Chemical Oxygen Demand and color were determined by the estimate of the adsorbent’s efficiency as a function of time by comparing the cycles of reuse bath dying residual, raw wastewater and wastewater treated with ashes. The maximum efficiency obtained was 91% in the 1st cycle. However, in the 5th cycle the efficiency adsorbent was near 46%.

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Determinação do número de ciclos de reuso do adsorvente cinza de casca de arroz no tratamento de um banho residual de tingimento têxtil

Eclética Química Journal ◽

10.26850/1678-4618eqj.v40.1.2015.p01-10 ◽

2017 ◽

Vol 40 (1) ◽

pp. 01 ◽

Cited By ~ 1

Author(s):

Ivonete Oliveira Barcellos ◽

Thyego De Lima ◽

Ana Maria Blosfeld

Keyword(s):

Chemical Oxygen Demand ◽

Rice Husk ◽

Continuous Flow ◽

Rice Husk Ash ◽

Flow System ◽

Oxygen Demand ◽

Maximum Efficiency ◽

Continuous Flow System ◽

Raw Wastewater

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Acclimatization Study for Biohydrogen Production from Palm Oil Mill Effluent (POME) in Continuous-flow System

E3S Web of Conferences ◽

10.1051/e3sconf/20183402054 ◽

2018 ◽

Vol 34 ◽

pp. 02054 ◽

Cited By ~ 1

Author(s):

N. Idris ◽

N.A. Lutpi ◽

Y. S. Wong ◽

T.N. Tengku Izhar

Keyword(s):

Steady State ◽

Palm Oil ◽

Continuous Flow ◽

Flow System ◽

Oxygen Demand ◽

Biohydrogen Production ◽

Palm Oil Mill Effluent ◽

Continuous Flow System ◽

Thermophilic Fermentation ◽

Palm Oil Mill

This research aims to study the acclimatization phase for biohydrogen production from palm oil mill effluent (POME) by adapting the microorganism to the new environment in continuous-flow system of thermophilic bioreactor. The thermophilic fermentation was continuously loaded with 0.4 L/day of raw POME for 35 days to acclimatize the microorganism until a steady state of biohydrogen production was obtained. The significance effect of acclimatization phase on parameter such as pH, microbial growth, chemical oxygen demand (COD), and alkalinity were also studied besides the production of biogas. This study had found that the thermophilic bioreactor reach its steady state with 1960 mL/d of biogas produced, which consist of 894 ppm of hydrogen composition.

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Silver Recovery and Reduction of Chemical Oxygen Demand from Used Fixing Reagent of X-Ray Laboratory Using Electrolysis Coupled with Adsorption onto Crab-Shell Chitosan and Black Rice-Husk Ash

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.824.45 ◽

2019 ◽

Vol 824 ◽

pp. 45-51

Author(s):

Ratana Sananmuang ◽

Jirapa Yodphet ◽

Wipharat Chuachuad Chaiyasith

Keyword(s):

Chemical Oxygen Demand ◽

Rice Husk ◽

Rice Husk Ash ◽

Oxygen Demand ◽

Atomic Absorption Spectrophotometry ◽

Crab Shell ◽

Black Rice ◽

Silver Recovery ◽

X Ray ◽

Flame Atomic Absorption

Used fixing reagent, from X-ray laboratories of hospitals is often contaminated with numerous chemicals. Silver (Ag (I)) ion is the major contaminant present in used fixing reagent. This work determined the Ag (I) ion and chemical oxygen demand (COD) in used fixing reagent of X-ray laboratory. The removal of Ag (I) ion was done by electrolysis and followed with the adsorption onto crab shell chitosan (CSC) and black rice husk ash (BRHA). The Ag (I) ions in an used fixing reagent was analyzed by flame atomic absorption spectrophotometry (FAAS) at λ = 540 nm. The COD was measured by reflux technique and the results indicated that the initial concentrations of Ag (I) ions and COD values were 5,634.66 ± 179.74 mg L-1 and 182,821.28 ± 5759.04 mg L-1, respectively. The optimum voltage and time for electrolysis were 2 volts and 10 hrs. After the electrolysis had been done, 82.28% of the Ag (I) ions were removed, while the COD was reduced by 51.76%. After the adsorption experiment was applied, 72.16% of the Ag (I) ions were adsorbed onto CSC and 51.83%. onto BRHA. The COD was reduced 37.04% and 34.08% by CSC and BRHA, respectively. Therefore, these two techniques, electrolysis and adsorption, are appropriated techniques for Ag (I) ions recovery and the COD reduction of the used fixing reagent discharged from X-ray laboratories.

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Effect of electroporation in a continuous flow system on bioaccumulation of magnesium, zinc and calcium ions in Lactobacillus rhamnosus B 442 cells

Bioelectrochemistry ◽

10.1016/j.bioelechem.2021.107769 ◽

2021 ◽

Vol 140 ◽

pp. 107769

Author(s):

Sujka Monika ◽

Pankiewicz Urszula ◽

Flisar Karel ◽

Miklavčič Damijan ◽

Haberl-Meglič Sasa

Keyword(s):

Calcium Ions ◽

Continuous Flow ◽

Flow System ◽

Lactobacillus Rhamnosus ◽

Continuous Flow System

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Developments of a continuous-flow system with immobilized biocatalysts towards sustainable bioprocessing

Reaction Chemistry & Engineering ◽

10.1039/d1re00189b ◽

2021 ◽

Author(s):

Apisit Naramittanakul ◽

Supacha Buttranon ◽

A. Petchsuk ◽

Pimchai Chaiyen ◽

Nopphon Weeranoppanant

Keyword(s):

Continuous Flow ◽

Flow System ◽

Continuous Flow System ◽

P Immobilization ◽

Feasible Solutions

Immobilization methods have emerged as feasible solutions for increasing the re-usability of biocatalysts, and for simplifying their separation from the desired products. Immobilized biocatalysts can directly be applied to a...

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