著者

Weetara Boontham Xinyu Zhang Hiroaki Habaki Ryuichi Egashira

出版者

The Society of Chemical Engineers, Japan

雑誌

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN (ISSN:00219592)

巻号頁・発行日

vol.55, no.4, pp.181-187, 2022-04-20 (Released:2022-04-20)

参考文献数

27

---

The main aim of this study is to remove lignin, which is one of the main colored substance in palm oil mill effluent (POME), by adsorption using activated carbon prepared from palm kernel shell (PKSAC) for POME decolorization in Thailand’s palm industry. First, PKSAC was prepared by a chemical activation method using orthophosphoric acid and the effects of treatment conditions on yield and characteristic of PKSAC were studied. With lower treatment temperature, the yield and specific surface area of PKSAC became higher, and PKSAC with high yield (0.8 at highest) and surface area (1,400×103 m2 kg-AC−1 at highest) could be obtained without extreme elevation of treatment temperature. Second, batch equilibrium adsorption of the model POME containing lignin was conducted using the prepared PKSAC to study the adsorption performance of PKSAC. The obtained PKSAC could effectively adsorb and remove lignin in model POME (fractional removal of 0.4 at highest). The adsorption followed the Langmuir equation and the saturated adsorbed amount was correlated with the specific surface area of PKSAC. Subsequently, the feasibility of PKSAC utilization for POME treatment was discussed by a simple material balance in the palm oil production process based on the yield and adsorption performance of PKSAC obtained in the above experiments. The amount of obtained PKSAC was much larger than that necessary for the removal of all lignin in POME in the process. Consequently, the treatment of POME by PKSAC was proposed as a feasible method to remove lignin for POME decolorization in Thailand’s palm industry.