Nyamplung Seed Waste Can Become Quality Compost with EM4 Starter

Image: article cover, from Eritrina et al. (2018), Jurnal Wasian, licensed CC BY-NC 4.0.

Solid waste from nyamplung seeds (Calophyllum inophyllum), long discarded as a by-product of the oil industry, can be processed into quality compost. Research by a team from the Forest Biotechnology and Tree Improvement Research Centre shows that compost from nyamplung seed cake meets the quality standard for organic fertiliser, SNI No. 19-7030-2004, on several chemical parameters. The study was published in Jurnal Wasian in 2018.

The research team tested four types of starter: a biostarter based on bovine rumen contents, Prouponic Gb #1, EM4 and Primadec C-15. The results showed that starter type significantly affected compost quality, particularly electrical conductivity (EC) and total nitrogen, phosphorus and potassium content. Prouponic Gb #1 and EM4 gave the best results compared with the other starters. The EC value, C/N ratio and total N, P and K of the nyamplung seed cake compost all complied with SNI.

These findings matter because nyamplung seed cake is a solid waste from the nyamplung oil industry that accumulates in considerable quantities. Through composting, this waste is not only reduced but also gains added value as an organic fertiliser. The researchers recommend using Prouponic Gb #1 and EM4 to process nyamplung seed cake waste into quality compost.

Source and how to cite

This story is based on the research article Compost Quality of Nyamplung (Calophyllum inophyllum L.) Solid Waste Oil Industri with Four Starters by Eritrina Windyarini Eritrina, Budi Leksono Budi and Tri Maria Hasna Hasna, published in Jurnal Wasian Vol. 5 No. 2 (2018). The full article is free to read on the Jurnal Wasian website.

Cite the original article (APA 7):

Eritrina, E. W., Budi, B. L., & Hasna, T. M. H. (2018). Compost Quality of Nyamplung (Calophyllum inophyllum L.) Solid Waste Oil Industri with Four Starters. Jurnal Wasian, 5(2), 127–134. https://doi.org/10.62142/8f87g645

If you use these findings in coursework, a thesis or other writing, cite the original article above, not this news story. The original article is licensed CC BY-NC 4.0.