Effects of Ultrafine Grinding and Pulsed Magnetic Field Treatment on Removal of Free Gossypol from Cottonseed Meal

• Published in: Food and bioprocess technology 2016-09, Vol.9 (9), p.1494-1501
• Main Authors: Dai, Chunhua, Ma, Haile, Zhang, Liuping, Zhu, Shuyun, Yin, Xiulian, He, Ronghai
• Format: Article
• Language: English
• Subjects: Agriculture; Air flow; Biotechnology; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Cottonseed meal; Detoxification; Food Science; Gossypol; Grinding; Magnetic fields; Mathematical models; Original Paper; Quadratic equations; Response surface methodology; Ultrafines; Weight
• ISSN: 1935-5130; 1935-5149
• DOI: 10.1007/s11947-016-1735-9

The main objective of this research was to study the effects of ultrafine grinding and pulsed magnetic field (PMF) treatment on free gossypol (FG) content in cottonseed meal (CSM). The results revealed that FG content decreased from 831 to 584 mg kg −1 after CSM was ultrafine ground with an airflow crusher. A further decrease of FG content was achieved by processing with PMF. Response surface methodology (RSM) was applied to optimize the process of detoxification, and results showed that the influence of PMF intensity and pulse numbers was remarkable. Removal efficiency increased distinctly with increasing of PMF intensity (50–500 mT) and pulse numbers (10–60) but decreased slightly with increasing of sample weight (0.5–10 g). The relationship between the removal ratio of FG and PMF intensity, pulse numbers, and sample weight all can be expressed with quadratic equations, respectively. The total removal ratio of FG even reached 83.39 % after cottonseed coarse powder (CSCP) was processed with ultrafine grinding and PMF under conditions of PMF intensity (500 mT), pulse number (50), and sample weight (3 g). And the Box–Behnken design (BBD) generated satisfactory mathematical models that accurately explained the behavior of the system, allowing one to predict the removal efficiency of FG from CSM.