The microbial mechanism of enhanced biological denitrification for advanced treatment of textile and dyeing wastewater based on iron

2020 ◽  
Vol 207 ◽  
pp. 205-212
Author(s):  
Jieting Ma
Keyword(s):  
Advanced Treatment ◽  
Dyeing Wastewater ◽  
Biological Denitrification ◽  
Microbial Mechanism

Preparation of a New Adsorption Material and its Application in Wastewater Treatment

2011 ◽  
Vol 356-360 ◽  
pp. 498-501
Author(s):  
Wen Jie Jin ◽  
Fan Chao Zeng ◽  
Han Xue ◽  
Ying Wang
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Carbon Materials ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Biochemical Process ◽  
Effluent Water ◽  
Dyeing Wastewater ◽  
Printing And Dyeing Wastewater ◽  
New Material

A kind of new adsorption material for wastewater treatment was made of fly ash as the main composition, with addition of sodium silicate, cement and pore forming material as the accessory materials, etc. Three kinds of practical wastewater were treated by using the new material, they were printing and dyeing wastewater, papermaking wastewater and coking wastewater, respectively. The results showed that removal COD efficiencies of the three kinds of wastewater were 57.89%, 71.43%, 80%, respectively, removal color efficiencies were 90%, 92%, 92%, respectively. The new developed material was mainly used for advanced treatment of the effluent water after biochemical process. It will be a substitute for activated carbon materials and have preferable application prospect.

Study on the Advanced Treatment of Printing and Dyeing Wastewater by Fenton Oxidation

2014 ◽  
Vol 1010-1012 ◽  
pp. 805-808
Author(s):  
Xiu Wen Wu ◽  
Ping Ma ◽  
Hui Xia Lan ◽  
Heng Zhang ◽  
Shan Hong Lan
Keyword(s):  
Reaction Time ◽  
Removal Efficiency ◽  
Treatment Effect ◽  
Cod Removal ◽  
Fenton Oxidation ◽  
Advanced Treatment ◽  
Dyeing Wastewater ◽  
Printing And Dyeing Wastewater ◽  
Cod Removal Efficiency

The influence of H2O2、addition of Fe2+、pH、reaction time and temperature to advanced treatment effect of printing and dyeing wastewater with Fenton oxidation was studied. The results showed that when the addition of H2O2(the concentration was 30%) was 3mL/L,the addition of FeSO4·7H2O was 1.6g/L,pH was 4,the temperature was about 30°C,reacting time was 35min,the COD removal efficiency achieved above 55%,COD of effluent was below 45mg/L.

Study on Treatment of Dyeing Wastewater by Fe0-H2O2 System

2014 ◽  
Vol 1048 ◽  
pp. 507-510
Author(s):  
Shan Hong Lan ◽  
Chuan Lu Wang ◽  
Jia Hao Sun ◽  
Heng Zhang
Keyword(s):  
Waste Water ◽  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Waste Water Treatment ◽  
Advanced Treatment ◽  
Dyeing Wastewater ◽  
Biochemical Treatment ◽  
Printing And Dyeing Wastewater ◽  
Initial Ph ◽  
Biochemical Degradation

Printing and dyeing wastewater contained difficult biochemical degradation of organic matters. It required advanced treatment after the biochemical treatment. In this paper, effeccts of pH, the amount of iron and hydrogen peroxide, the ratio of iron and hydrogen peroxide and reaction time on the Fe0-H2O2system were studied. The results showed that all the above factors were important to dyeing waste water treatment by Fe0-H2O2system. CODCrremoval efficiency could archive 65% when the initial pH was 3, the iron powder capacity was 1.5g/L,the volume of hydrogen peroxide was 1ml/L, the reaction time was 40 min and the temperature was 30°C.

Advanced treatment of dyeing wastewater for reuse

1999 ◽  
Vol 39 (10-11) ◽  
pp. 249-255 ◽  
Author(s):  
X. Z. Li ◽  
Y. G. Zhao
Keyword(s):  
Biological Treatment ◽  
Photocatalytic Oxidation ◽  
Treatment Process ◽  
Oxidation Process ◽  
Membrane Filter ◽  
Significant Proportion ◽  
Treated Wastewater ◽  
Advanced Treatment ◽  
Dyeing Wastewater ◽  
Textile Dyeing

As one of the main pollution sources in Hong Kong, the textile dyeing and finishing industry creates a significant proportion of water pollution in nearby harbour zones. Generally speaking, conventional biological treatment processes have difficulties in degrading many dye chemicals causing high COD and colour in dyeing wastwaters. Studies using physical and chemical processes to further reduce COD and colour from dyeing wastewater have been intensively reported. The use of a photocatalytic process in the presence of TiO2 to degrade many different types of dye chemicals has been confirmed. However, how to efficiently separate and reuse TiO2 from treated wastewater became a notable problem in the application of a TiO2 photo-oxidation process. This study aims to develop an advanced treatment process for dyeing wastewater treatment. In which dyeing wastewater was initially treated by an Intermittently Decanted Extended Aeration (IDEA) reactor to initially remove those biodegradable matters and further treated by a TiO2 photocatalytic reactor as advanced treatment for complete decolorization and high COD removal. Suspended TiO2 powder used in photooxidation was separated from slurry by a membrane filter and recycled to the photoreactor continuously. The results demonstrated that photocatalytic-oxidation process could degrade those non-biodegradable organic substances in the effluent treated by the biological treatment process and also remove the colour from the effluent completely. TiO2, as catalyst, was successfully recovered by a membrane filter and continuously reused in the photoreactor. The quality of dyeing wastewater treated by the advanced treatment process can be good enough for reuse in the textile dyeing processes.

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