KAJIAN KUALITAS LIMBAH CAIR KEGIATAN PERTAMBANGAN BIJIH NIKEL PT. ANEKA TAMBANG Tbk, HALMAHERA TIMUR, MALUKU UTARA

PT. Aneka Tambang is a state company in mining. One of them is mining nickel ore in Tanjung Buli, East Halmahera, North Maluku undertaken by Yudhistira Bumi Bhakti Company. The mining which is open pit mining. Nickel ore mining process produces liquid waste that can affect the nature and the environment. Therefore, the aims of this study are 1) Knowing the quality of liquid waste contained in sedimentation ponds when it is compared to the standard of liquid waste quality, 2) Knowing the quality of the sea water around the outlet of the exhaust compared to the standard of sea water quality, 3) Spacial analysis of the influence of liquid waste on the environment. The method used in this thesis was purposive sampling. This method is used and be based on the position of settling ponds used for liquid waste sedimentation.The number of water samples was 5 for liquid waste and 6 for seawater samples that exist around the liquid waste outlet. The result of water quality data will be compared with the standard of liquid waste and the standard of sea water quality. The result showed that the quality parameters of liquid waste effluent meets the quality standards, including the quality of the sea water. The value showed from the primary and secondary data have not exceeded the maximum limit required by effluent quality standard of nickel ore mining activities. On the other hand, liquid waste produced by the process of nickel ore mining is still in a safe threshold to be discharged into waters, so it has no impact on the nature and the environment around the mining area

KARAKTERISTIK SELF PURIFICATION SUNGAI CELENG KECAMATAN IMOGIRI KABUPATEN BANTUL

Rivers have an ability to purify waste which called by self purification. The waste either from upper or middle of river will be purified when it reaches downstream. Celeng River is a river that passes through residential areas so the quality of stream is affected by the waste generated from the settlement activities. The purposes of this research are to determine distribution of existing pollution potential points along the river and the effect for river�s water quality. This research also aimed to determine characteristics of river�s water quality based on DO, BOD and CO