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KEEFEKTIFAN BEBERAPA DEKOMPOSER UNTUK PENGOMPLOSAN LIMBAH SLUDGE PABRIK KERTAS SEBAGAI BAHAN BAKU PUPUK ORGANIK

Abstrak
Sludge, a solid waste by-product of paper industry, is very useful as raw materials for organic fertilizer, since this material contains carbon, and others mineral such as nitrogen, phosphorus, and pottasium. This researh evaluated 128 treatments which is combination of32 decomposers and four types of media. Thirty two decomposer are combination of 5 selected isolates i.e. omphalina sp., agrayli sp., pholyota sp., T. Pseudokoningii, and unidentified fungsi isolated from basal stem of coconut, while four types of media were sludge, sludge +cocopit, sludge+manure, sludge+cocopit+manure. composting of sludge was conducted in bag log containing 0.5 kg dry weight of sludge. Optimim condition of composting of sludge was obtained by supplementing with manure in combination with the composer (Polyota sp. And mixture of omphalina sp.+agraylie sp.+ unidentfiied fungsi isolated from basal stem of coconut). This condition can enchaane the rate of composting process, showed by reducing dry weight of compost and C concentration, and the highest percentage of carbon reducing. Application of this organic fertilizer increase the growth, N and P