THE STUDY OF FLY ASH EFFECT AS FERTILIZER
Bernaded Oka Anggarani, Rasgianti, Meiri Triani, Ruly B. Sitanggang

PT. PLN Puslitbang Ketenagalistrikan

Abstract

Nowadays, power plants in Indonesia are still dominated by coal-fired power plants which produce 25% bottom ash (BA) and 75% fly ash (FA). The large number of FA produced each day is one of the problems on coal-fired power plants due to Government Regulation no. 101 of 2014 concerning Management of Hazardous and Toxic Waste (B3) which states that FA is included in the category of B3 waste, so that processing cannot be carried out optimally. Therefore, this research intends to conduct a study related to the effect of FA as fertilizer on plants.

In this study, FA sample used were FA of Nagan Raya, Labuhan Angin, Suge, Jeranjang and Punagaya. Those five samples were tested for characteristics and heavy metals to determine the content contained on those FA samples.

In this experiment, The ratios used between soil and FA is 25% FA: 75% land, 50% FA: 50% land, 100% FA and 100% land. Plant seeds used were chili, corn, and okra. The results of planting for three months showed that the FA Punagaya, FA Jeranjang, and the Nagan Raya FA could grow okra plants, while the Labuhan Angin FA could grow corn seeds at a ratio of 25% FA: 75% soil and 50% FA: 50% soil.

Keywords: coal-fired power plant, fertilizer, fly ash

Topic: Environmental Engineering