Frying practices, oils quality and development of natural adsorbents to regenerate frying oils used by unlicensed street vendors of fried meat in Bamenda, North-West Cameron

Food chemistry advances Pub Date : 2025-04-10 DOI:10.1016/j.focha.2025.100977

Gires Boungo Teboukeu , Aphrodite Tchewonpi Choumessi , Audrey Akaanie Andongatei , Fabrice Tonfack Djikeng , Ronice Zokou , Clifford Boubga , Lifoter Kenneth Navti

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Abstract

This study aimed at assessing the frying practices, oils quality used by street vendors of fried meat in Bamenda and also develop natural absorbents to regenerate oils after frying. 31 vendors were interviewed on frying practices. Sample oils collected were analyzed measuring oxidation parameters. 10 % of each activated adsorbent prepared from groundnut shells and rice husks was mixed with degraded oils and the oxidation parameters before and after adsorption were evaluated. Results showed that none of the vendors followed the standard number of 08 frying cycles. Also, 54.84 % of the oils used for frying were dark and the filtration methods of the oils used after frying do not adsorb and remove oxidation products. Analysis of all oil samples showed extremely high levels of degradation with aldehydes up to 3–4 times higher than the standard in most samples. The treatment of degraded oils, regardless of the activated adsorbent used, reduced the free fatty acids, primary (peroxides) and secondary (aldehydes) oxidation products in the oils. The percentage improvement in oil quality was highest for the anisidine value (31.24 to 58.91 %) showing that the adsorbents adsorb/remove more aldehydes. The use of these adsorbents by street vendors for oil regeneration should be recommended.

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在卡麦隆西北部巴门达，无执照的炸肉街头摊贩所使用的煎炸油的煎炸做法、油的品质及天然吸附剂的发展

本研究旨在评估巴门达地区街头小贩的油炸做法和油炸肉品质的使用，并开发天然吸收剂，用于油炸后的油脂再生。31家供应商接受了有关油炸做法的采访。对采集的样品油进行氧化参数分析。以花生壳和稻壳为原料制备的活性吸附剂各占10%，分别与降解油脂混合，并对吸附前后的氧化参数进行了评价。结果显示，没有一家供应商遵循08次油炸循环的标准数量。另外，54.84%的油炸用油是深色的，油炸后使用的过滤方法不能吸附和去除氧化产物。对所有油样的分析显示，大多数样品中醛类的降解程度极高，高达标准的3-4倍。无论使用何种活性吸附剂，降解油的处理都减少了油中的游离脂肪酸、一次（过氧化物）和二次（醛）氧化产物。茴香胺值对油品质量的改善百分比最高（31.24% ~ 58.91%），表明吸附剂对醛类的吸附/去除效果更好。应建议街头小贩使用这些吸附剂进行油再生。

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