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09 January 2010

IPB Discover More Effective Bioremediation Technology

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BOGOR, INDONESIA - Institut Pertanian Bogor (IPB) found Bioremediation technology is more effective to deal with mine waste.

Researchers from the Program of Land and Environment Technology IPB, Ir Dr. Dwi Andreas Santosa said in Bogor, West Java, on Thursday (10/12), the technology's use of four types of local bacteria, which can clean the mud waste oil four times faster, and reduce levels of mercury up to 98.5 percent.

According to him, these findings technologies capable of cleaning waste oil four times faster than Bioremediation technology developed by an international oil company.

"This technology has proven its effectiveness to clean up waste oil and petroleum contaminated soil in a large scale through cooperation with PT Mitra Petroleum Indonesia in Dumai, Riau," he said.

Bioremediation technology is a technology that uses microorganisms to reduce the pollutants in the environment. Currently only one mining company that uses the IPB technology.

"Cooperation with PT Chevron is still in the process," he said.

He ensures that the use of this technology could clean up waste oil mud within 2.5 months for the area of one hectare with an estimated 3,000 to 4,000 tons of oil a mixture of mud and dirt.

In addition to faster, Bioremediation Andreas findings are able to reduce the cost of waste treatment. To clean the mud oil, for instance, could save between 25 to 50 percent if using Bioremediation with bacteria Bacillus sp.

"If using the conventional way will cost between 25 to 30 cubic dollars permeter contaminated soil, using this technology IPB findings needed only 15 to 20 cubic permeter U.S. dollars," he said.

Even to lower levels of mercury in the waste by using bacteria Pseudomonas pseudomallei, the cost of the required 1 / 400 of conventional detoxification technology using resin.

In 2005, he developed Bioreaktor with mercury detoxification capability of 86 percent for one hour. Newer Bioreaktor developed in 2007 to reduce mercury levels in the waste up to 98.5 percent in just 30 minutes.

He admitted that the Bioremediation of mercury waste is not applied in the field scale because most mercury wastes are generated by illegal miners.

"Obviously this requires the intervention of local governments, so that mercury waste produced by illegal miners before flowing into the rivers could be discussed first with this technology," he said.

Bioremediation technologies can also be used to treat acid mine water and dissolved heavy metals primarily from coal mines by relying on bacterial activity

Desulfotomaculum and Desulfotomaculum sp orientis a change sulphate in acid mine water into hydrogen sulfide and then react with heavy metals.

Utilization of these bacteria proved to increase the acidity of the mine waste from 2-3 to 6-7 or nearly neutral, while the heavy metals to settle, he said.

Andreas reveals, these bacteria have been used to overcome cases of cadmium contamination in paddy field in Bandung from textile industrial waste.

"When the rice seedlings were given these bacteria. And from the results of laboratory tests, the harvested rice containing cadmium zero percent," he said.

In studies conducted since 1999, he found four types of bacteria are native to Indonesia effectively used to extract the waste of Bacillus sp mine waste oil mud, Pseudomonas pseudomallei to extract mercury, Desulfotomaculum and Desulfotomaculum sp orientis for acid mine water and the bacteria Pseudomonas sp and Candida sp to describe phenol.

"These bacteria are not pathogenic, so do not endanger human health, animals and plants," he said. ant / itz

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