Utilisation of Ruminant Waste Microorganisms in a imple Co-Composting Method in Bioremediation of Used Oil Contaminated Soil

Abstract

The increase in vehicle ownership is directly proportional to the increase of lubricant oil usage (used oil) which has an impact on the environment. The purpose of the study was to determine the ability of the co-composting method to reduce the content of pollutants in soil contaminated with used oil by adding organic waste with ruminant livestock waste which contains many microorganisms. The used method for co-composting is a laboratory-scale rotary aerobic composter for 10 days of treatment with treatment components of 500ml used oil lubricant polluted soil, 1kg leaf litter, 2kg ruminant waste and 150ml agricultural EM4. The measured parameters were temperature, colour, texture, pH, humidity, Total Petroleum Hydrocarbon (TPH) and red spinach plants. The results showed that there were changes in the test parameters during the 10 days of treatment. The results of the T test data analysis showed that the application of compost fertilizer from the remediation results had a very significant effect on temperature, pH, humidity and a significant effect on the number of leaves due to the content of nitrogen (N) in compost that stimulates the formation of stems, roots and leaves. Isolated and identified microorganisms that consist of 14 bacterial isolates derived from ruminant livestock manure Application of microorganisms and EM4 bioactivator influenced the degradation of pollutants. The longer the composting process, the higher the percentage of TPH degradation.