Background. This paper investigated the effectiveness of lime treatment and subsequent acid precipitation (using H₂SO₄) as a pretreatment of partially stabilised leachate. This study obtained high removal efficiencies (>70%) from the lime and acid pretreated partially stabilised leachate. The treatment of this wastewater with 10 g/L dosage of optimum lime (pH 12) at 25°C had led to the 41% COD elimination in the initial stages of pretreatment. Subsequent pH adjustment using 1 N sulfuric acid and granular-activated carbon adsorption in general revealed more than 92% removal of the 4 g/L of carbon dosage. Therefore, the results revealed that the adsorption of COD on the GAC stemmed from the kinetics rate of the pseudo-second-order.

中文翻译：

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颗粒活性炭去除石灰和酸预处理部分稳定的渗滤液中的COD

背景。本文研究了石灰处理和随后酸沉淀（使用H ₂ SO ₄）作为部分稳定渗滤液的预处理的有效性。这项研究从石灰和酸预处理的部分稳定的渗滤液中获得了较高的去除效率（> 70％）。在25°C下用10 g / L剂量的最佳石灰（pH 12）处理该废水导致在预处理的初始阶段消除了41％的COD。随后使用1 N硫酸和颗粒活性炭吸附进行的pH调节通常表明，除去4 g / L的炭量后，去除率超过92％。因此，结果表明，COD在GAC上的吸附源于拟二级动力学速率。