Abstract:
Riau is well known as a primary province in producing crude palm oil. The waste of palm oil industry, such as Empty Fruit Bunch (EFB) and Palm Oil Mill Effluent (POME), contains cellulose, hemicellulose, lignin and nutrients that potential to be used as compost. Bio-activator is used to shorten composting time, and the used of fungi as bio-activator in composting is common. However, there is no information about potential of actinomycetes or mixed cultures of fungi and actinomycetes in composting. The aim of this research to study the potential mix cultures of fungi and actinomycetes in composting EFB and POME. Selected isolates is lignocellulolytic microorganism from peat soil of Riau which consist of 2 isolates of fungi (Aspergillus RPL1-14 and Apphylophorales RPL3-3) and 2 isolates of actinomycetes (Streptomyces RB1S3 and Frankia L3A7). Composting treatments included control negatif (seedling media without isolates), control positive by using effective microorganisms (EM4), starter 1 (RPL1-14 + RPL3-3 + RB1S3), starter 2 (RPL1-14 + RPL3-3 + L3A7) and starter 3 (RPL1-14 + RPL3-3 + RB1S3 + L3A7). Composting was conducted with 2 kg EFB and 250 ml POME as substrate, 1750 ml aquadest and were inoculated by 400 ml starter for 40 days. Total population of fungi in compost was 5,2-7,0 x 104 cfu g-1, actinomycetes 7,3-13,7 x 107 cfu g-1, cellulolytic microorganism 4,5-13,1 x 107 cfu g-1, ligninolytic fungi 4,5-5,5 x 104 cfu g-1 and ligninolytic actinomycetes 3,7-7,2 x 104 cfu g-1. Some characteristic of compost such as total N, P and K was accordance with SNI compost 19-7030-2004, they were 1,93-2,22%, 0,18-0,19% and 1,5-1,77%, respectively. Based on the result we can concluded that the quality of compost is almost the same for all treatment
