Jumin, Hasan Basri and Rosneti, Heni and Agusnimar, Agusnimar (2014) Application Of Crude Palm Oil Liquid Sludge Sewage on Maize (Zea Mays L) as Re-Cycle Possibility To Fertilizer. Journal of Agricultural Technology, 10 (6). pp. 1473-1488. ISSN 1686-9141

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Abstract

Many kind results of crude palm oil are very important for foodsand other food substitution materials. The fresh fruits of oil palm has been processing into cooking oil, and about 30 % of row materials appear into liquid or solid sludge sewage. Crude palm oil liquid or solid sludge sewage when processed with suitable process and true management, that the waste becoming fertilizers and possible use to agriculture purpose. Beside, that the negative image of crud palm oils sewage as material or toxic materialsthere could be solved. Crude palm oil liquid sludge sewage was treated to maize with 400 cc/plant could be increased mean relative growth rates, net assimilation rate, leaf area and dry weight of seed. There are indicated that 400cc/plant treated to maize significantly increase the average of mean relative growth rates into 0.32 g.day -1, leaf are at 50 days after planting increase from 1419 cm. Net assimilation rates increase from 13.5 mg.m-2 -1 .day -2 into 34.5 mg.m -1 .day and dry weight of seed from 38 g per plant into 43 g per plant. Crude palm oil liquid sludge waste chemical analysis indicated that, there are no exceed threshold content of dangerous metals and biology effects. Cadmium (Cd) content as heavy metal is lower than threshold of human healthy tolerance. Therefore, it has no syndrome effect to human health. Biological oxygen demands and chemical oxygen demands as indicators for micro-organism activities, there are under the threshold of human healthy tolerance. Our experiment indicated that the crude palm oil liquid sludge sewage could be used as substitution fertilizer for agriculture use.

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