Treatment of Dye Effluent by Electrochemical and Biological Processes

Abstract

Textile dye wastewater is well known to contain strong colour, high pH, temperature, Chemical Oxygen Demand (COD) and biodegradable materials. The electrochemical treatment of wastewater is considered as one of the advanced oxidation processes, potentially a powerful method of pollution control, offering high removal efficiencies the removal of colour of methyl red azo dye is a challenge in textile industry. The following methods have been adopted for the treatment of real textile wastewater: 1) Electro-oxidation (EO) and 2) Bio-treatment (BT). In EO process, reduction of COD and removal of colour were 70% and 81% respectively. The effluent was further treated by BT. BT showed a final reduction of 92% of COD and removal of colour by 95%. Both the combined processes were highly competitive and showed a very good reduction of COD and colour removal. Electrochemical processes generally have lower temperature requirement than those of other equivalent non-electrochemical treatments and there is no need for additional chemicals. These treatment methods may also be employed successfully to treat other industrial effluents

Cathodic hydrogen production by simultaneous oxidation of methyl red and 2,4-dichlorophenoxyacetate aqueous solutions using Pb/PbO2, Ti/Sb-doped SnO2and Si/BDD anodes. Part 1: electrochemical oxidation

“…4. 33 The absorption band at 520 nm is the responsible to the red color of this azo dye solution. For monitoring purposes, the band at 520 nm was chosen and for which a great molar absorptivity (3) value of 44 461.4 L mol À1 cm À1 was estimated (inset in Fig.…”

Additive Manufacturing in the Clothing Industry: Towards Sustainable New Business Models

“…The fashion industry "is characterized by short product life cycles, volatile and unpredictable demand, tremendous product variety, long and inflexible supply processes, and a complex supply chain" [28,29]. The textile industry, however, is concerned with the preparation of cloth and fabric through weaving, knitting, bleaching, and dyeing [30].…”

Response surface optimization of Rhodamine B dye removal using paper industry waste as adsorbent

“…A number of conventional physical, chemical and biological methods, such as ion-exchange [10], coagulation/flocculation [11], reverse osmosis [12], membrane filtration [13], electrochemical oxidation [14], electrochemical degradation [15], photodegradation [16], and heterocatalytic Fenton oxidation [17], have been used for the removal of dyes. The serious drawbacks of these methods are low efficiency, disposal of waste, low sensitivity, etc.…”