scholarly journals Application of Aloe vera mucilage as bioflocculant for the treatment of textile wastewater: process optimization

2020 ◽  
Vol 82 (11) ◽  
pp. 2446-2459
Author(s):  
Shende Ashwini Prabhakar ◽  
Nupur Ojha ◽  
Nilanjana Das
Keyword(s):  
Process Optimization ◽  
Contact Time ◽  
Aloe Vera ◽  
Textile Wastewater ◽  
Xrd Analysis ◽  
Box Behnken Design ◽  
Level 3 ◽  
Rsm Model ◽  
Optimized Conditions ◽  
Good Agreement

Abstract Aloe vera is an important commodity plant which has been traditionally used for the treatment of various diseases. This study investigated the use of extracted bioflocculant from Aloe vera for the treatment of textile wastewater. The bioflocculant was extracted, purified and characterized using GC-MS, FTIR, SEM, AFM, EDX and XRD analysis. It was mainly composed of carbohydrate (19.5%) and protein (6.0%). Box-Behnken design (BBD), using 3 level-3 variables, was employed to enhance the decolorization process by optimizing the effect of various factors. A significant enhancement from 62.50 ± 0.1 to 82.01 ± 0.8% in decolorization of wastewater was observed under optimized conditions viz. bioflocculant dosage (60 mg/L), pH (5.0) and contact time (180 min). A quadratic polynomial model was adequate beside the actual statistics at an R2 value of 0.99 for the response decolorization % and was in good agreement with the predicted value (82.01 ± 0.1%) obtained by the RSM model. The results of the present investigation demonstrated that Aloe vera mucilage can serve as a promising bioflocculant with high removal efficiency for solids, colour and dye from wastewater. To the best of our information, this is the first report on the use of Aloe vera mucilage as a natural bioflocculant for the treatment of dye-bearing wastewater.

scholarly journals CuO Coated Electrochemically Generated Textile Wastewater Sludge and CuO Coated GAC as Potential Nano-adsorbents for Color Removal from Real Textile Wastewater

2018 ◽  
Vol 34 (4) ◽  
pp. 2144-2151
Author(s):  
Srikantha H, S. Mahesh ◽  
Sahana M
Keyword(s):  
Contact Time ◽  
Cell Voltage ◽  
Textile Wastewater ◽  
Xrd Analysis ◽  
Operating Conditions ◽  
Wastewater Sludge ◽  
Color Removal ◽  
Batch Adsorption ◽  
Batch Mode ◽  
Nano Adsorbent

A laboratory scale setup was used to remove color from real textile wastewater (TWW) using nano CuO coated electrochemically generated sludge and nano CuO coated GAC. ECC studies were conducted in batch-mode to generate sludge treating real TWW using pre-optimized 4SS electrodes using a 1.5L reactor operated at cell voltage of 18V and current density 180A/m2 at an agitation speed of 500rpm for 60min electrolysis time. SEM, FTIR and XRD analysis confirmed CuO material successfully coated/decorated on electrochemically generated sludge of size ~0.3-0.5mm and GAC of size ~0.5mm. To check the color removal efficiencies from TWW the batch adsorption studies were conducted for adsorbent dose, stirring time and pH. The optimal operating conditions achieved at pH-4, dose of 0.6g/L and 30min contact time for CuO-sludge nano-adsorbent achieving 50-55% color removal. Similarly, for CuO-GAC nano-adsorbent the optimal conditions obtained at pH-4, 0.5 g/L dose and 20min contact time achieving ~100% removal.

scholarly journals DETERMINING OPTIMIZED CONDITIONS FOR COAGULATION OF BASIC RED 46 DYE IN TEXTILE WASTEWATER BY POLY ALUMINIUM CHLORIDE USING EXPERIMENT PLANNING METHOD

2010 ◽  
Vol 13 (1) ◽  
pp. 29-34
Author(s):  
Duc Sy Dao
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Contact Time ◽  
Textile Wastewater ◽  
Aluminium Chloride ◽  
Experiment Planning ◽  
Operating Parameters ◽  
Optimum Conditions ◽  
Optimized Conditions ◽  
Basic Red 46

In this study, the coagulation using poly aluminium chloride (PAC) was applied in order to remove Basic Red 46, a cation dye from wastewater. The effects of some key operating parameters such as PAC dose, pH as well as contact time on the COD and color removal were investigated. Response surface methodology (RSM) showed that PAC dose of 785 mg/L; pH of 12; contact time of 105 minutes were optimum conditions for the coagulation of BR46.

An efficient biotreatment process for polyvinyl alcohol containing textile wastewater

2013 ◽  
Vol 8 (3-4) ◽  
pp. 469-478 ◽  
Author(s):  
Sandip S. Magdum ◽  
Gauri P. Minde ◽  
Upendra S. Adhyapak ◽  
V. Kalyanraman
Keyword(s):  
Polyvinyl Alcohol ◽  
Process Optimization ◽  
Textile Wastewater ◽  
Cost Effective ◽  
Chemical Oxidation ◽  
High Rate ◽  
Microbial Consortia ◽  
Environment Friendly ◽  
Candida Sp ◽  
Textile Wastewater Treatment

The aim of this work was to optimize the biodegradation of polyvinyl alcohol (PVA) containing actual textile wastewater for a sustainable treatment solution. The isolated microbial consortia of effective PVA degrader namely Candida Sp. and Pseudomonas Sp., which were responsible for symbiotic degradation of chemical oxidation demand (COD) and PVA from desizing wastewater. In the process optimization, the maximum aeration was essential to achieve a high degradation rate, where as stirring enhances further degradation and foam control. Batch experiments concluded with the need of 16 lpm/l and 150 rpm of air and stirring speed respectively for high rate of COD and PVA degradation. Optimized process leads to 2 days of hydraulic retention time (HRT) with 85–90% PVA degradation. Continuous study also confirmed above treatment process optimization with 85.02% of COD and 90.3% of PVA degradation of effluent with 2 days HRT. This study gives environment friendly and cost effective solution for PVA containing textile wastewater treatment.

Process optimization of K2C2O4-activated carbon from kenaf core using Box–Behnken design

2013 ◽  
Vol 91 (9) ◽  
pp. 1783-1789 ◽  
Author(s):  
Yan-Dan Chen ◽  
Wei-Qun Chen ◽  
Biao Huang ◽  
Ming-Jie Huang
Keyword(s):  
Activated Carbon ◽  
Process Optimization ◽  
Box Behnken Design ◽  
Kenaf Core

Computational Investigation of Different Turbulent Models When Predicting Airflow in an Enclosure

2008 ◽  
Author(s):  
Xi Wang ◽  
Hassan Naji ◽  
Ahmed Mezrhab
Keyword(s):  
Numerical Investigation ◽  
Turbulence Models ◽  
Turbulent Stress ◽  
Computational Investigation ◽  
Isothermal Case ◽  
The Mean ◽  
Turbulent Models ◽  
Rsm Model ◽  
Cold Case ◽  
Good Agreement

In the present study, a numerical investigation is carried out for an isothermal case, a hot case and a cold case with FLUENT code. Three turbulence models are considered: the k-ε realisable model, the RNG k-ε model and the RSM linear model. The obtained results are compared to experiments and show generally a good agreement for the mean velocities and temperatures, but less satisfactory for the turbulent stress. The performance of the RSM model is remarkable. Even if none of the models is able to give the exact experimental pattern on the map of turbulence, the RSM model seems able to predict such configuration.

scholarly journals Performance of silver-coated red soil nanocomposites in water disinfection

2018 ◽  
Vol 54 (1) ◽  
pp. 70-78 ◽  
Author(s):  
Ebrahim Mahmoudi ◽  
Farid Moeinpour
Keyword(s):  
Contact Time ◽  
Elimination Rate ◽  
Red Soil ◽  
Water Disinfection ◽  
Box Behnken Design ◽  
E Coli ◽  
Surface Response Method ◽  
Research Findings ◽  
Response Method ◽  
Bacterial Effect

Abstract The present research studied the anti-bacterial effect of silver-coated red soil nanoparticles on Gram-negative bacteria Escherichia coli (E. coli) from water. The effects of disinfectant concentration (0.02, 0.05 and 0.1 g/mL), contact time (10, 20 and 30 minutes) and bacteria number (102, 104 and 106 CFU/mL) have been also investigated. To obtain important factors, the interactions between factors and optimal experimental design in surface response method were used based on Box-Behnken design. According to the research findings, the system is efficient in eliminating E. coli. The results showed that E. coli elimination efficiency intensified through increasing the amount of disinfectant from 0.02 to 0.1 g/mL. Expanding contact time from 10 minutes to 30 minutes also heightened the E. coli elimination rate. R2 for E. coli elimination is 0.9956 indicating a good agreement between model experimental data and forecasting data.

scholarly journals Treatment of Pretreated Textile Wastewater Using Modified Mbbr

2018 ◽  
Vol 7 (3.8) ◽  
pp. 106
Author(s):  
K J.Sosamony ◽  
P A.Soloman
Keyword(s):  
Magnetic Field ◽  
Textile Industry ◽  
Contact Time ◽  
Textile Wastewater ◽  
Filling Ratio ◽  
Textile Effluent ◽  
Fundamental Parameters ◽  
Film Reactor ◽  
Textile Sludge ◽  
Chemical Strategies

Currently, water pollution control is one of the major logical zones. The textile industry is a major pollution causing industry among the industrial pollutions. Treatment of textile effluent utilizing customary physical as well as chemical strategies is costly, produces enormous amounts of sludge and needs the expansion of lethal chemicals. BOD to COD proportion of textile effluent is low. Thus it is not appropriate to treat textile effluent by a solitary physicochemical or biological process. In this investigation, the textile effluent is dealt with utilizing Moving Bed Bio-film Reactor (MBBR) with the magnetic field after improving the biodegradability by the solar photo-Fenton process. The carriers in MBBR is inoculated with azoarcus bacteria isolated from textile sludge. The fundamental  parameters as pH, carrier filling ratio and contact time were optimized utilizing Box Behnken factual design. The MBBR process has most extreme efficiency at pH 7, filling ratio of 62% and a contact time 2.4 days. In this optimum condition 68.9% BOD and 80% COD  are expelled. At the point when the pretreated wastewater was dealt with MBBR reactor under the influence of magnetic field, the efficiency of the treatment is additionally expanded, so 87.4% COD expulsion and 87% BOD evacuation were accomplished at 12 mT attractive field power when exposure time was at 12 hrs.  

Synthesis of biodiesel using potassium fluoride (KF) supported by hydrotalcite and process optimization by Box–Behnken design

2012 ◽  
Vol 2 (4) ◽  
pp. 317-325 ◽  
Author(s):  
Bhaskar Singh ◽  
Ashish Birla ◽  
S. N. Upadhyay ◽  
Zahira Yaakob ◽  
Yogesh C. Sharma
Keyword(s):  
Process Optimization ◽  
Potassium Fluoride ◽  
Box Behnken Design

scholarly journals PREPARATION OF ORAL CURCUMIN DELIVERY FROM 3D-NANO-CELLULOSE NETWORKS MATERIAL PRODUCED BY ACETOBACTER XYLINUM USING OPTIMIZATION TECHNIQUE

2020 ◽  
pp. 47-52
Author(s):  
THANH XUAN NGUYEN ◽  
HUONG LAN THI PHAM ◽  
THUONG THI NGO ◽  
PHONG XUAN ONG
Keyword(s):  
Oral Delivery ◽  
Positive Impact ◽  
Optimization Technique ◽  
Box Behnken Design ◽  
Independent Variables ◽  
3D Network ◽  
Nano Cellulose ◽  
Optimized Conditions ◽  
The Impact

Objective: To prepare oral curcumin delivery and optimize curcumin loading of 3D-nano-cellulose networks material (3DCM) by looking into the impact of process variables on the response utilizing response surface methodology (RSM) and Box-Behnken design. Methods: Optimization of curcumin loading of 3DCM was conducted using RSM and Box-Behnken model. Impact of four independent variables, including, the concentration of curcumin (X1), temperature (X2), shaking speed (X3), and time of loading (X4), was studied on one dependent response, that is, an amount of loaded curcumin (Y). Characterization of optimized 3DCM including curcumin was examined by Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) analysis . Results: R2 value for Y was approximately 0.94. X1 possessed the biggest positive impact compared to X2, X3 and X4. Optimized conditions for curcumin loading of 3DCM were X1 at 3 mg/ml, X2 at 40 °C, X3 at 120 rpm and X4 at 120 min. SEM photograph of 3DCM surfaces were found including fibers creating a 3D network structure. FTIR spectra studies depicted that there was no interaction between curcumin and 3DCM. Conclusion: The data obtained in this study thus suggest that curcumin loaded 3DCM was successfully fabricated to give a potential oral delivery system of curcumin.

Sign in / Sign up

Export Citation Format

Share Document