Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (04): 78-83.doi: 10.13475/j.fzxb.20180904606

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Optimization of decolorization conditions of Direct Scarlet 4BS by Cerrena unicolor

XU Hongyun1, YU Cun2(), SU Bang1   

  1. 1. College of Eco-Environment Engineering, Guizhou Minzu University, Guiyang, Guizhou 550025, China
    2. College of Forestry, Guizhou University, Guiyang, Guizhou 550025, China
  • Received:2018-09-18 Revised:2020-01-19 Online:2020-04-15 Published:2020-04-27
  • Contact: YU Cun E-mail:chifengyucun@163.com

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Abstract:

Aiming to avoid secondary pollution in treating dyeing wastewater and to clarify the decolorization ability of Cerrena unicolor to direct dyes, the decolorization effect of 5 direct dyes under solid condition was detected by Cerrena unicolor. Meanwhile, the decolorization conditions of Direct Scarlet 4BS by Cerrena unicolor were optimized. The results show that 5 direct dyes can be decolorized by Cerrena unicolor, among which, the decolorization performance of Direct Scarlet 4BS is the most obvious. The optimized decolorization conditions of Direct Scarlet 4BS dye by Cerrena unicolor are found as follows: glucose 20 g/L, ammonium nitrate 1 g/L, MgSO4 1.5 mmol/L, and inoculation amount is 2 pieces (diameter 1 cm)/50 mL reaction system. Under optimized conditions, the decolorization rate of Direct Scarlet 4BS by Cerrena unicolor is 92.00% at 13 d. Compared with the decolorization rate before optimization, the decolorization rate is increased by 50.82%.

Key words: Cerrena unicolor, direct dye, Direct Scarlet 4BS, decolorization, dyeing wastewater

CLC Number: 

  • X791

Tab.1

Factors and levels of orthogonal test"

水平 A
葡萄糖质
量浓度/
(g·L-1)		 B
硫酸铵质
量浓度/
(g·L-1)		 C
硫酸镁浓度/
(mmol·L-1)		 D
接菌量
(直径为1 cm)/
片
1 15 0.5 0.5 2
2 20 1.0 1.0 4
3 25 1.5 1.5 6

Fig.1

Decolorization of 5 kinds of direct dyes by Cerrena unicolor"

Fig.2

Decolorization of Direct Scarlet 4BS under different carbon sources by Cerrena unicolor"

Fig.3

Decolorization of Direct Scarlet 4BS under different nitrogen sources by Cerrena unicolor"

Fig.4

Decolorization of Direct Scarlet 4BS under different metal ions by Cerrena unicolor"

Fig.5

Decolorization of Direct Scarlet 4BS under different pH values by Cerrena unicolor"

Fig.6

Decolorization of Direct Scarlet 4BS under different dye concentration conditions by Cerrena unicolor"

Tab.2

Optimization of decolorizing condition of Direct Scarlet 4BS by Cerrena unicolor by orthogonal test"

试验
编号		 葡萄糖质
量浓度/
(g·L-1)		 硫酸铵质
量浓度/
(g·L-1)		 硫酸镁
浓度/
(mmo·L-1)		 接菌量
(直径为
1 cm)/片		 脱色
率/%
1 15 0.5 0.5 2 88.25
2 15 1.0 1.0 4 77.67
3 15 1.5 1.5 6 85.54
4 20 0.5 1.0 6 74.37
5 20 1.0 1.5 2 89.12
6 20 1.5 0.5 4 75.98
7 25 0.5 1.5 4 78.28
8 25 1.0 0.5 6 82.40
9 25 1.5 1.0 2 79.89
K1 79.82 80.07 82.21 85.75
K2 83.83 86.59 77.31 77.31
K3 80.19 80.47 85.68 81.31
R 4.01 6.12 7.37 8.44
最优水平 20 1.0 1.5 2

Fig.7

Decolorization rate of Direct Scarlet 4BS by Cerrena unicolor before and after decolorization"

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