scholarly journals Pilot-Scale Study of Real Domestic Textile Wastewater Treatment Using Cassia fistula Seed-Derived Coagulant

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Minh-Trung Dao ◽  
Vo-Chau-Ngan Nguyen ◽  
Thanh-Nha Tran ◽  
Xuan-Du Nguyen ◽  
Duc-Thuong Vo ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Cassia Fistula ◽  
Bench Scale ◽  
Carboxylate Groups ◽  
Coagulant Dosage ◽  
Initial Ph ◽  
Seed Gum ◽  
Textile Wastewater Treatment

Plant-derived coagulants have exhibited a good potential in wastewater treatment due to their “green” characteristics, high coagulating-flocculating activity, cost-effectiveness, and biodegradability. Nevertheless, research studies have focused mainly on bench-scale experiments; pilot-scale and full-scale simulations are still limited. Herein, we firstly report a pilot-scale study of real domestic textile wastewater treatment using Cassia fistula coagulant. The material characterizations using Fourier-transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), and dynamic light scattering (DLS) revealed that the natural gum extracted from C. fistula seed possessed a rough and irregular surface containing a high molecular weight galactomannan. The bench-scale investigation was initially conducted to determine the optimal pollutant concentration, initial pH, and coagulant dosage in the coagulation-flocculation process. The pilot-scale study revealed that C. fistula coagulant is an effective material for real textile wastewater treatment, showing percentage removal of 93.83% at a volume of 30 L and a coagulant dosage of 1.17 mg·L−1. Coagulation-flocculation using C. fistula seed gum could be an efficient primary wastewater treatment prior to membrane or biological methods to meet Vietnamese environmental standards. The main mechanisms of textile wastewater treatment involve adsorption/bridging interactions via hydrogen bonding and electrostatic attraction between negatively charged carboxylate groups of the coagulant and positively charged pollutants.

Application of a combined process of moving-bed biofilm reactor (MBBR) and chemical coagulation for dyeing wastewater treatment

2006 ◽  
Vol 54 (9) ◽  
pp. 181-189 ◽  
Author(s):  
D.H. Shin ◽  
W.S. Shin ◽  
Y.-H. Kim ◽  
Myung Ho Han ◽  
S.J. Choi
Keyword(s):  
Wastewater Treatment ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Biofilm Reactor ◽  
Dyeing Wastewater ◽  
Moving Bed Biofilm Reactor ◽  
Combined Process ◽  
Chemical Coagulation ◽  
Moving Bed ◽  
Textile Wastewater Treatment

A combined process consisted of a Moving-Bed Biofilm Reactor (MBBR) and chemical coagulation was investigated for textile wastewater treatment. The pilot scale MBBR system is composed of three MBBRs (anaerobic, aerobic-1 and aerobic-2 in series), each reactor was filled with 20% (v/v) of polyurethane-activated carbon (PU-AC) carrier for biological treatment followed by chemical coagulation with FeCl2.In the MBBR process, 85% of COD and 70% of color (influent COD=807.5 mg/L and color=3,400 PtCo unit) were removed using relatively low MLSS concentration and short hydraulic retention time (HRT=44 hr). The biologically treated dyeing wastewater was subjected to chemical coagulation. After coagulation with FeCl2, 95% of COD and 97% of color were removed overall. The combined process of MBBR and chemical coagulation has promising potential for dyeing wastewater treatment.

Textile wastewater treatment and reuse by solar catalysis: results from a pilot plant in Tunisia

2004 ◽  
Vol 49 (4) ◽  
pp. 331-337 ◽  
Author(s):  
L. Bousselmi ◽  
S.-U. Geissen ◽  
H. Schroeder
Keyword(s):  
Wastewater Treatment ◽  
Pilot Plant ◽  
Degradation Kinetics ◽  
Wastewater Reuse ◽  
Textile Wastewater ◽  
Dichloroacetic Acid ◽  
Bench Scale ◽  
Economic Application ◽  
Textile Wastewater Treatment ◽  
Textile Factory

Based on results from bench-scale flow-film-reactors (FFR) and aerated cascade photoreactors, a solar catalytic pilot plant has been built at the site of a textile factory. This plant has an illuminated surface area of 50 m2 and is designed for the treatment of 1 m3 h-1 of wastewater. The preliminary results are presented and compared with a bench-scale FFR using textile wastewater and dichloroacetic acid. Equivalent degradation kinetics were obtained and it was demonstrated that the solar catalytic technology is able to remove recalcitrant compounds and color. However, on-site optimization is still necessary for wastewater reuse and for an economic application.

scholarly journals Dioscorea hispida Starch as a Novel Natural Coagulant in Textile Wastewater Treatment

2021 ◽  
Vol 53 (2) ◽  
Author(s):  
Mohd Suffian Yusoff ◽  
Farrandie Juni ◽  
Zaber Ahmed ◽  
Motasem Azaiza ◽  
Hamidi Abdul Aziz
Keyword(s):  
Wastewater Treatment ◽  
Textile Wastewater ◽  
Dry Weight ◽  
Optimal Conditions ◽  
Natural Coagulant ◽  
Jar Test ◽  
Coagulant Dosage ◽  
Textile Wastewater Treatment ◽  
General Physical ◽  
Starch Yield

The process of coagulation-flocculation using Dioscorea hispida starch as a natural coagulant was investigated for the purification of textile effluent from several dyeing and finishing mills. The major parameters tested were COD, turbidity, and color. Prior to conducting the experiments, the general physical characteristics of Dioscorea hispida starch were investigated. The optimal conditions, pH and coagulant dosage were assessed using a jar test. The results demonstrated that the Dioscorea hispida starch yield was 15.38% of Dioscorea hispida dry weight. Pulverizing of Dioscorea hispida mass also resulted in approximately 10-15% of impurities in the final product. The optimal pH of 7 resulted in maximum COD, turbidity and color reductions of 28%, 94% and 64% respectively. The optimum dosage of Dioscorea hispida starch of 2500 mg/L resulted in a maximum reduction of 22%, 93%, 63%, of COD, turbidity, and color, respectively. Overall, this study confirmed that the utilization of Dioscorea hispida starch as a natural coagulant offers a relatively good removal efficiency in textile wastewater treatment.

scholarly journals Pyrite/H2O2/hydroxylamine system for efficient decolorization of rhodamine B

2021 ◽  
Author(s):  
Guang-Jun He ◽  
Deng-Jie Zhong ◽  
Yun-Lan Xu ◽  
Peng Liu ◽  
Si-Jing Zeng ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Rhodamine B ◽  
Textile Wastewater ◽  
Oh Radical ◽  
Pyrite Surface ◽  
Optimum Conditions ◽  
Dye Pollutants ◽  
Initial Ph ◽  
Degradation Reaction ◽  
Textile Wastewater Treatment

Abstract To improve the efficiency of the Fe(II)/Fe(III) cycle and continuous reactivity of pyrite, a pyrite/H2O2/hydroxylamine (HA) system was proposed to treat rhodamine B (RhB). The results showed that near-complete decolorization and 52.8% mineralization 50 mg L−1 RhB were achieved under its optimum conditions: HA 0.8 mM, H2O2 1.6 mM, pyrite 0.4 g L−1, and initial pH 4.0. The degradation reaction was dominated by an •OH radical produced by the reaction of Fe2+ with H2O2 in solution. HA primarily had two roles: in solution, HA could accelerate the Fe(II)/Fe(III) cycle through its strong reducibility to enhance RhB decolorization; on the pyrite surface, HA could improve the continuous reactivity of pyrite by inhibiting the oxidation of pyrite. In addition, the dosing manner of HA had a significant effect on RhB decolorization. In addition, the high decolorization and mineralization efficiency of other dye pollutants suggested that the pyrite/H2O2/HA system might be widely used in textile wastewater treatment.

Nanofiltration hollow fiber membranes for textile wastewater treatment: Lab-scale and pilot-scale studies

2014 ◽  
Vol 114 ◽  
pp. 51-57 ◽  
Author(s):  
Yee Kang Ong ◽  
Fu Yun Li ◽  
Shi-Peng Sun ◽  
Bai-Wang Zhao ◽  
Can-Zeng Liang ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Hollow Fiber ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Hollow Fiber Membranes ◽  
Fiber Membranes ◽  
Textile Wastewater Treatment

Treatability studies of textile wastewater on an aerobic fluidized bed biofilm reactor (FABR): a case study

2009 ◽  
Vol 59 (9) ◽  
pp. 1817-1821 ◽  
Author(s):  
Thalla Arun Kumar ◽  
S. Saravanan
Keyword(s):  
Wastewater Treatment ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Textile Wastewater ◽  
Pilot Scale ◽  
Biofilm Reactor ◽  
Combined Process ◽  
Biofilm Process ◽  
Textile Wastewater Treatment

The performance of a pilot scale aerobic fluidized bed biofilm process and chemical coagulation for textile wastewater treatment was studied. In order to enhance biological treatment efficiency of textile wastewater, poly urethane cubes were incorporated as a supporting media for attached growth. Fenton's reagent was used as a coagulant in the present study. The fluidized bed biofilm process was operated at four HRTs (3, 4.5, 6 and 8 hour) and the results showed that the COD removal efficiency increased from 69% to 94% when the HRT increased from 3 to 4.5 and there of the removal efficiency remained constant around 94%, even though using relatively low MLSS concentration and short sludge retention time. COD and TDS removals of 94.2% and 93.3% were achieved by overall combined process (FABR + Coagulation aided Sedimentation). After the treatment there is remarkable decrease in colour in addition to COD and TDS. This combined process was highly competitive in comparison to the other similar combined systems. It was concluded that this combined process was successfully employed and much effectively decreased they COD, TDS and color of textile wastewater treatment at pilot scale.

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