Solid waste from sugar cane which are familiar to call “blotong†and “ketel†dust is potentially to compost. In the composting process, biostarnio activator is added to increase the composting process. The composting process take + 22 days to produce mature compost and the product has been met the SNI 19 7030-2004, which are N 1,37%;  P 2 O 5  1,81%; K 2 O 2,22%; Fe 0,49%; Ca 2,56%; MgO 0,53%; Mn 0,03%; pH 7,1; Zn 80,99 ppm; Cu 44,01 ppm; C organic 16,48%; C/N ratio 12,03 %.
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