Aerobic decolourization of the indigo dye-containing textile wastewater using continuous combined bioreactors

This study investigates flamboyant pods (FP) and chitosan [extracted from periwinkle shells (PS)] modified flamboyant pods (CMFP) adsorbents for dye removal from textile industrial wastewater, and were compared with commercial activated carbon (CAC). Physicochemical properties with dye concentrations of wastewater were investigated before and after adsorption using standard methods and Ultraviolet-visible Spectrophotometer respectively. Batch adsorption were performed and pH (3.0, 4.0, 6.0, 9.0, 11.5), adsorbent dosage (0.1, 0.2, 0.3, 0.4, 0.5 g), contact time (10, 20, 30, 40, 50, 60 minutes) and initial concentration (25, 50, 100, 125, 250 mg/L) were optimized for Indigo dye using the adsorbents. Initial concentration data was used to test conformity with Langmuir and Freundlich adsorption isotherms. Adsorption efficiencies for simulation ranged from 11.33±0.70 to 83.8±0.00. Optimum adsorption conditions of indigo dye were pH 6, 0.1g sorbent dosage, 60 minutes contact time and 250 mg/L dye concentration; gave efficiencies of 83.8%, 79.6% and 89.8% for FP, CMFP, CAC respectively with wastewater. Physicochemical parameters of wastewater decreased except nitrate which increased from 11.53±0.00 to 34.65±1.41mg/L. Data best fit Langmuir than Freundlich adsorption isotherm. The study inferred that FP and PS could be processed as less expensive, environment friendly alternative adsorbent to the costly CAC for treating textile wastewater.

Download Full-text

emoval of Dye from Textile Wastewater by Electrolytic Treatment

NFC-IEFR Journal of Engineering and Scientific Research ◽

10.24081/nijesr.2017.1.0001 ◽

2017 ◽

Vol 5 (1) ◽

Keyword(s):

Textile Wastewater ◽

Electrolytic Treatment

Download Full-text

Anaerobic Raw Textile Wastewater Treatment in UASB Reactor with Cow Dung Manure and Activated Sludge as Substrate

Journal of Environmental Science Computer Science and Engineering & Technology ◽

10.24214/jecet.a.6.3.23542 ◽

2017 ◽

Vol 6 (3) ◽

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Textile Wastewater ◽

Uasb Reactor ◽

Cow Dung ◽

Textile Wastewater Treatment

Download Full-text

An efficient biotreatment process for polyvinyl alcohol containing textile wastewater

Water Practice & Technology ◽

10.2166/wpt.2013.049 ◽

2013 ◽

Vol 8 (3-4) ◽

pp. 469-478 ◽

Cited By ~ 2

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.

Download Full-text

Anaerobic Treatment of Polyethylene Terephthalate (PET) Wastewater from Lab to Full Scale

Water Science & Technology ◽

10.2166/wst.1999.0426 ◽

1999 ◽

Vol 40 (8) ◽

pp. 229-236 ◽

Cited By ~ 4

Author(s):

F. Fdz-Polanco ◽

M. D. Hidalgo ◽

M. Fdz-Polanco ◽

P. A. García Encina

Keyword(s):

Polyethylene Terephthalate ◽

Loading Rate ◽

Treatment Plant ◽

Textile Wastewater ◽

Anaerobic Treatment ◽

Cod Removal ◽

Organic Loading Rate ◽

Foam Formation ◽

Organic Loading ◽

Start Up

In the last decade Polyethylene Terephthalate (PET) production is growing. The wastewater of the “Catalana de Polimers” factory in Barcelona (Spain) has two main streams of similar flow rate, esterification (COD=30,000 mg/l) and textile (COD=4000 mg/l). In order to assess the anaerobic treatment viability, discontinuous and continuous experiments were carried out. Discontinuous biodegradability tests indicated that anaerobic biodegradability was 90 and 75% for esterification and textile wastewater. The textile stream revealed some tendency to foam formation and inhibitory effects. Nutrients, micronutrients and alkali limitations and dosage were determined. A continuous lab-scale UASB reactor was able to treat a mixture of 50% (v) esterification/textile wastewater with stable behaviour at organic loading rate larger than 12 g COD/l.d (0.3 g COD/g VSS.d) with COD removal efficiency greater than 90%. The start-up period was very short and the recuperation after overloading accidents was quite fast, in spite of the wash-out of solids. From the laboratory information an industrial treatment plant was designed and built, during the start-up period COD removal efficiencies larger than 90% and organic loading rate of 0.6 kg COD/kg VSS.d (5 kg COD/m3.d) have been reached.

Download Full-text

Textile Wastewater Reuse: Ozonation of Membrane Concentrated Secondary Effluent

Water Science & Technology ◽

10.2166/wst.1999.0580 ◽

1999 ◽

Vol 40 (4-5) ◽

pp. 99-105 ◽

Cited By ~ 18

Author(s):

A. Lopez ◽

G. Ricco ◽

R. Ciannarella ◽

A. Rozzi ◽

A. C. Di Pinto ◽

...

Keyword(s):

Wastewater Treatment ◽

Acute Toxicity ◽

Wastewater Treatment Plant ◽

Textile Industry ◽

Nonionic Surfactants ◽

Wastewater Reuse ◽

Treatment Plant ◽

Textile Wastewater ◽

Secondary Effluent ◽

Complete Disappearance

Among the activities appointed by the EC research-project “Integrated water recycling and emission abatement in the textile industry” (Contract: ENV4-CT95-0064), the effectiveness of ozone for improving the biotreatability of recalcitrant effluents as well as for removing from them toxic and/or inhibitory pollutants has been evaluated at lab-scale. Real membrane concentrates (pH=7.9; TOC=190 ppm; CDO=595 ppm; BOD5=0 ppm; Conductivity=5,000 μS/cm; Microtox-EC20=34%) produced at Bulgarograsso (Italy) Wastewater Treatment Plant by nanofiltering biologically treated secondary textile effluents, have been treated with ozonated air (O3conc.=12 ppm) over 120 min. The results have indicated that during ozonation, BOD5 increases from 0 to 75 ppm, whereas COD and TOC both decrease by about 50% and 30 % respectively. As for potentially toxic and/or inhibitory pollutants such as dyes, nonionic surfactants and halogenated organics, all measured as sum parameters, removals higher than 90% were achieved as confirmed by the complete disappearance of acute toxicity in the treated streams. The only ozonation byproducts searched for and found were aldehydes whose total amount continuously increased in the first hour from 1.2 up to 11.8 ppm. Among them, formaldehyde, acetaldehyde, glyoxal, propionaldehyde, and butyraldehyde were identified by HPLC.

Download Full-text