Department of Food Technology, Kongu Engineering College, Perundurai, Erode 638052, TN, India.
Carbohydr Polym. 2013 Sep 12;97(2):451-7. doi: 10.1016/j.carbpol.2013.05.012. Epub 2013 May 16.
The objectives of the present study is to investigate the chitosan as an adsorbent to treat rice mill wastewater under different process conditions such as agitation time (2-6 min), initial pH (2.5-6.5), chitosan dose (400-800 mg/l) and settling time (10-30 min) in order to study the removal efficiency of chemical oxygen demand (COD) and total suspended solids (TSS). The results showed that, all process variables have significant effect on the removal efficiencies. The optimum process conditions were determined (agitation time of 4 min, initial pH of 4.5, chitosan dose of 600 mg/l and settling time of 20 min) and showed high removal efficiencies (COD: 98% and TSS: 95%). FT-IR spectrophotometry was used to analyze and confirm the adsorption process. From the experimental data, Box-Behnken design (BBD) was used to develop the second order polynomial models with high coefficient of determination values (COD: 0.991 and TSS: 0.989).
本研究的目的是在不同的工艺条件下，如搅拌时间（2-6 分钟）、初始 pH 值（2.5-6.5）、壳聚糖剂量（400-800mg/L）和沉降时间（10-30 分钟）下，研究壳聚糖作为吸附剂处理米厂废水的情况，以研究化学需氧量（COD）和总悬浮固体（TSS）的去除效率。结果表明，所有工艺变量对去除效率均有显著影响。确定了最佳工艺条件（搅拌时间 4 分钟、初始 pH 值 4.5、壳聚糖剂量 600mg/L 和沉降时间 20 分钟），并表现出高去除效率（COD：98%，TSS：95%）。傅里叶变换红外光谱（FT-IR）分光光度法用于分析和确认吸附过程。根据实验数据，采用 Box-Behnken 设计（BBD）建立了具有高决定系数值的二次多项式模型（COD：0.991，TSS：0.989）。
