| dc.description.abstract | Lapindo mud sediment is accumulated from the mud volcano explosion. Sediments are the key to ancient and historical environments to observe the environmental change. The existence of metals tends to accumulate in sediment. Furthermore, the morphological and biochemical qualities of thermophilic bacteria A1 and S1 isolated from mud water and solid sediment of Lapindo Sidoarjo, as well as the ability to suspect A1 and S1 isolates based on biochemical tests, were thought to be advantageous in the fishing sector. Thus, exploratory method was used to determine the thermophilic bacteria. Moreover, Physico-chemical analysis was carried out to investigate the concentration of heavy metal status in sediments of Lapindo Mud, in its current condition and the physical texture of the Lapindo mud. The metals detected in the sediments include copper (Cu), iron (Fe), Manganese (Mn), cobalt (Co), zinc (Zn), cadmium (Cd), molybdenum (Mo) and boron (B). Pb and Hg were not detected in Lapindo mud samples. The sediments are characterized by the abundances of silt and clay with minor amounts of sand. In addition, laboratory analysis shows that the water hold capacity average is 50% in Lapindo mud sediment. From the A1 isolate, Marinobacter lutaoensis was found based on the test results of 16S rDNA and from the S1 isolate, Marinobacter hydrocarbonoclasticus was obtained based on the test results of 16S rDNA. | en_US |
