Optimization studies on decolorization of textile wastewater using natural coagulants

2022 ◽  
Author(s):  
D. Shruthi Keerthi ◽  
M. Mukunda Vani
Keyword(s):  
Textile Wastewater ◽  
Natural Coagulants

scholarly journals OPTIMIZATION OF COAGULATION-FLOCCULATION PROCESS FOR TREATMENT OF INDUSTRIAL TEXTILE WASTEWATER USING NOPAL CACTUS POWDER

2020 ◽  
Vol 1 (2) ◽  
pp. 40-43
Author(s):  
Tran Thanh Đat ◽  
Trinh Trong Nguyen ◽  
Thai Van Nam
Keyword(s):  
Ph Value ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Wastewater Sample ◽  
Stirring Time ◽  
Natural Coagulants ◽  
Textile Wastewater Treatment ◽  
Flocculation Process ◽  
Best Parameters

Using natural coagulants derived from available and popular plants ensures the quality of wastewater discharged, saving costs for businesses, environmentally friendly. SEM results show that surface of the material is rough with the multi-layered structure that increases the contact areas, deep holes with undefined shapes on materials will increase diffusion and absorption of dirty residues of different sizes. To investigate the effectiveness of textile wastewater treatment by dried Nopal Cactus powder, the Jartest model was used to identify the best parameters for handling color levels and chemical oxygen demand (COD) treatment of artificial wastewater sources. Jartest experiment identified the best values for removing color levels and COD: pH = 3, dried Nopal Cactus powder amount of 100mg/L, stirring velocity of 40 rpm; stirring time of 10 minutes. The efficiency of processing color levels and COD with the best parameters are 87.85% and 60.21%, respectively. Regarding the efficiency of processing textile wastewater, there shows an average color reduction efficiency (52.89%), low-level COD treatment (25.56%). Optimal result: with dyeing textile wastewater sample, the input COD value is 260 mg/L, the color level is 470Pt-Co. The experiment with 36 test modes is run by STAGRAPHIC XV software and analyzed by ANOVA combination of 2 variables COD and color levels, the results with the highest performance for the color level and COD are 77.07% and 59.11% respectively. The optimal pH value is 2.6, the amount of dried Nopal Cactus powder is 80 mg/L, stirring velocity is 40.0 rpm, the time is 8.2 minutes

Assessment of natural coagulants to remediate Tunisian textile wastewater by combining physicochemical, analytical, and toxicological data

2020 ◽  
Vol 27 (32) ◽  
pp. 40088-40100
Author(s):  
Nosra Methneni ◽  
Roel Anthonissen ◽  
Jolien Van de Maele ◽  
Fatma Trifa ◽  
Luc Verschaeve ◽  
...  
Keyword(s):  
Textile Wastewater ◽  
Toxicological Data ◽  
Natural Coagulants

scholarly journals Textile wastewater purification through natural coagulants

2011 ◽  
Vol 1 (1-2) ◽  
pp. 25-33 ◽  
Author(s):  
J. Beltrán-Heredia ◽  
J. Sánchez-Martín ◽  
M. T. Rodríguez-Sánchez
Keyword(s):  
Textile Wastewater ◽  
Wastewater Purification ◽  
Natural Coagulants

scholarly journals Turbidity and TSS removal from textile wastewater using a combination of natural and chemical coagulants

2020 ◽  
Vol 7 (2) ◽  
pp. 36-43
Author(s):  
Noor Shakir Ali ◽  
Ali Jwied Jaeel
Keyword(s):  
High Performance ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Textile Wastewater ◽  
Turbidity Removal ◽  
Natural Coagulant ◽  
Flocculation Activity ◽  
Capparis Spinosa ◽  
Natural Coagulants ◽  
Textile Wastewater Treatment

Abstract: Recently natural coagulants are a consistently expanded; plants extracted coagulant which may be adopted in the coagulation-flocculation activity of textile wastewater treatment for reduction concentration of turbidity and total suspended solids. In this study, the possibility of a combination between chemical coagulant (alum) and natural plant coagulant (Capparis Spinosa) in excluding turbidity and total suspended solids from textile wastewater has been studied. A set of experiments were implemented for verifying the turbidity and TSS removal efficiency using alum and powder extracted from Capparis Spinosa plant separately. A combined dosage consisted of chemical coagulant (alum) dosages (10, 20, 30 and 40 mg/l) with natural coagulant dosages (10, 20, 30 and 40 mg/l) in order to detect the optimum combined percentage of both coagulants (alum and Capparis Spinosa) that produces higher removal efficiencies for both turbidity and TSS. The study found the activity of removal for both turbidity and total suspended solids increased in high performance when mixing is occurred between natural coagulant (Capparis Spinosa) and chemical coagulant (Alum). The results illustrate that the combination of 20 mg/l alum with 30 mg/l Capparis Spinosa made 99% turbidity removal and the combination of 30 mg/l alum with 30 mg/l Capparis Spinosa made 98% TSS removal.

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.

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

1999 ◽  
Vol 40 (8) ◽  
pp. 229-236 ◽  
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.

Textile Wastewater Reuse: Ozonation of Membrane Concentrated Secondary Effluent

1999 ◽  
Vol 40 (4-5) ◽  
pp. 99-105 ◽  
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.

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