Hachicha Ridha, Hachicha Salma, Trabelsi Imen, Woodward Steve, Mechichi Tahar
Ecole Nationale d'Ingénieurs de Sfax, Department of Biology, Route de Soukra, BP 1173, 3038 Sfax, Tunisia.
Chemosphere. 2009 Jun;75(10):1382-6. doi: 10.1016/j.chemosphere.2009.02.064. Epub 2009 Mar 29.
Olive mill wastewater sludge, resulting from the natural evaporation of olive oil processing effluent, was co-composted with poultry manure and changes in the lipid fraction investigated. Composting was achieved after approximately 9 months, leading to a compost with high stability and maturity (C/N ratio: 11.9; cation exchange capacity (CEC): 85.9 meq 100 g(-1) organic matter, CEC/total organic carbon: 4.2 meq g(-1); humic acids carbon/fulvic acids carbon: 2.2) useable directly in agriculture and having the same fertilizing capacity as farmyard manure. Composting led to a reduction in the lipid fraction by at least 95%. Unsaturated fatty acids, particularly polyunsaturated acids, were the most degraded (reduction of 55%) leading to an increase in saturated fatty acids. This change was confirmed by the relative increase in the peroxide index from 5 to 32.5 meq O(2)kg(-1) fats, and a decrease in the C(18:2)/C(16:0) ratio from 0.9 to 0.3. In addition, this study demonstrated that 1.2% of the humic acids component of the compost comprised fatty acids.
橄榄油加工废水经自然蒸发后产生的橄榄果渣废水污泥与家禽粪便进行了共堆肥，并对脂质部分的变化进行了研究。大约9个月后完成堆肥，得到了一种稳定性和成熟度高的堆肥（碳氮比：11.9；阳离子交换容量（CEC）：85.9 meq 100 g(-1) 有机质，CEC/总有机碳：4.2 meq g(-1)；腐殖酸碳/富里酸碳：2.2），可直接用于农业，且施肥能力与农家肥相同。堆肥使脂质部分减少了至少95%。不饱和脂肪酸，尤其是多不饱和脂肪酸，降解程度最高（减少了55%），导致饱和脂肪酸增加。过氧化物指数从5 meq O(2)kg(-1) 脂肪相对增加到32.5 meq O(2)kg(-1) 脂肪，以及C(18:2)/C(16:0) 比值从0.9降至0.3，证实了这种变化。此外，本研究表明，堆肥中腐殖酸成分的1.2%由脂肪酸组成。
