Journal of South China University of Technology(Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (11): 120-125.doi: 10.3969/j.issn.1000-565X.2017.11.017

• Environmental Science & Technology • Previous Articles     Next Articles

Extraction of Caramel Pigment from High-Concentration Yeast Wastewater and its Influence on Pollution Load

LI You-ming1 GE Guang-de1 FANG Xue-xing2 HU Song-qing2 HOU Yi1,2   

  1. 1.State Key Laboratory of Pulp and Paper Engineering,South China University of Technology Guangzhou 510640,Guangdong,China; 2.School of Food Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2016-12-14 Revised:2017-05-11 Online:2017-11-25 Published:2017-10-01
  • Contact: 侯轶(1973-)，女，博士，高级工程师，主要从事工业废水处理工艺与设计研究． E-mail:ceyhou@scut.edu.cn
  • About author:李友明(1957-)，男，教授，博士生导师，主要从事制浆造纸清洁生产技术、造纸化学品等的研究． E-mail:ymli3@scut．edu．cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(21476091) and the Science and Technology Planning Project of Guangdong Province，China(2015A020215009)

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Abstract: In order to determine the effect of the caramel pigment on the pollution load in high-concentration yeast wastewater,the caramel pigment in the high-concentration yeast wastewater was extracted by means of ultrafiltration membrane separation.Then,the properties of the caramel pigment were investigated,and the influence of the ex- traction on both the pollution load and the subsequent anaerobic treatment was also explored.The results show that the caramel pigment in the high-concentration yeast wastewater can be extracted for the utilization of resource,with an extraction ratio of 15g/L and an appearance quality which is up to the national standard.After the extraction,the CODCr and color of the wastewater and the pollution load significantly decrease,while the biodegradability of CODCr /BOD5 increases from 0. 33 to 0. 51,and thus the efficiency of the subsequent anaerobic treatment is greatly improved.The research results can provide a new technical route for the resource utilization and effective treatment of high-concentration fermentation wastewater.

Key words: yeast wastewater, caramel color, ultrafiltration membrane, anaerobic treatment process, pollution load

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