Verification of Biodegradation Efficiency of Textile Wastewater Using Ecotoxicity Test on Sinapis Alba

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.

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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.

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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.

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Evaluating the efficiency of advanced oxidation processes for textile wastewater treatment: Electro‐kinetic, sonochemical and persulfate

Environmental Progress & Sustainable Energy ◽

10.1002/ep.13531 ◽

2020 ◽

Author(s):

Sahand Jorfi ◽

Zeinab Ghaedrahmat

Keyword(s):

Wastewater Treatment ◽

Advanced Oxidation Processes ◽

Advanced Oxidation ◽

Textile Wastewater ◽

Oxidation Processes ◽

Textile Wastewater Treatment

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Polyethersulfone ultrafiltration membrane incorporated with ferric-based metal-organic framework for textile wastewater treatment

Separation and Purification Technology ◽

10.1016/j.seppur.2021.118819 ◽

2021 ◽

Vol 270 ◽

pp. 118819

Author(s):

Nur Azizah Johari ◽

Norhaniza Yusof ◽

Woei Jye Lau ◽

Norfadhilatuladha Abdullah ◽

Wan Norharyati Wan Salleh ◽

...

Keyword(s):

Wastewater Treatment ◽

Metal Organic Framework ◽

Textile Wastewater ◽

Ultrafiltration Membrane ◽

Metal Organic ◽

Textile Wastewater Treatment ◽

Organic Framework

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Comparative Effects of Organic and Conventional Cropping Systems on Trace Elements Contents in Vegetable Brassicaceae: Risk Assessment

Applied Sciences ◽

10.3390/app11020707 ◽

2021 ◽

Vol 11 (2) ◽

pp. 707

Author(s):

Fernando Cámara-Martos ◽

Jesús Sevillano-Morales ◽

Luis Rubio-Pedraza ◽

Jesús Bonilla-Herrera ◽

Antonio de Haro-Bailón

Keyword(s):

Trace Elements ◽

Organic Agriculture ◽

Metal Content ◽

Cropping Systems ◽

Sinapis Alba ◽

Soil Characteristics ◽

Inorganic Elements ◽

Inorganic Element ◽

Dietary Reference Intakes ◽

Brassicaceae Family

Genotypes selected from 3 plant species (Brassica rapa, Eruca vesicaria and Sinapis alba) belonging to the Brassicaceae family were chosen to compare the concentrations of 9 inorganic elements (Cd, Co, Cr, Cu, Fe, Ni, Mn, Pb and Zn) in these varieties, that were grown under both conventional and organic conditions during two agricultural seasons (2018/2019 and 2019/2020) on two different experimental farms (Farm I and Farm II). We found that, together with agriculture practices, the inorganic element concentrations in Brassicas depended on many other factors, including soil characteristics. However, there were no conclusive results indicating a lower heavy metal content or a higher nutritionally beneficial trace elements content in vegetables grown under organic agriculture. Finally, a probabilistic assessment (@Risk) derived from the consumption of 150–200 g of these vegetables showed that organic Brassicas fulfill in comparison with the conventional ones, similar Dietary Reference Intakes (DRI) percentages for Co, Cr, Cu, Fe, Mn and Zn. Regarding heavy metals (Cd, Ni and Pb), we only found slight differences (mainly in the case of Pb) in the Tolerable Intakes (TI) between both cropping systems.

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