This study aimed to evaluate eggshell wastes, which have the potential to turn into high value-added products in paper industry. Membrane-removed eggshell wastes were subjected to certain processes of washing, drying, grinding, and sieving. The final product of eggshell calcium carbonate (ECC) was used in office paper production as filler, and its possible effect on physical and optical properties of papers was investigated. Mixed office wastes were turned pulp using as raw material of office paper production. Moreover, the effects of ECC was compared with the use of industrial calcium carbonates of ground (GCC) and precipitated (PCC) forms as filler. Breaking lengths of the papers were shown to reduce up to 65.2, 76.6, and 64.1% by a 30% usage of GCC, PCC, and ECC fillers, respectively. PCC and GCC were more effective in improved optical properties of papers than ECC. The brightness values were measured to be 96.8, 98.4, and 93.1 ISO% with a 30% dosage of GCC, PCC, and ECC fillers, respectively. These results suggested that ECC can be used as filler in paper industry.

这项研究旨在评估蛋壳废料，这些废料有可能在造纸工业中转变成高附加值的产品。去除膜的蛋壳废物经过一定的洗涤，干燥，研磨和筛分过程。蛋壳碳酸钙（ECC）的最终产品被用作办公用纸的填料，并研究了其对纸的物理和光学性能的可能影响。混合的办公废物被用作纸浆的生产原料，变成了纸浆。此外，将ECC的效果与使用地面工业碳酸钙（GCC）和沉淀形式（PCC）的碳酸钙作填充剂进行了比较。通过使用30％的GCC，PCC和ECC填料，纸张的断裂长度分别减少了65.2％，76.6和64.1％。PCC和GCC在改善纸张光学性能方面比ECC更有效。分别使用30％剂量的GCC，PCC和ECC填充剂测得的亮度值为96.8、98.4和93.1 ISO％。这些结果表明ECC可以在造纸工业中用作填料。