Abstract
Ex-mining pond water is widely used for the daily needs of the people these days, such as bathing, washing, and even drinking. Over time, it turns out that coal mine acid water has polluted the environment. The use of membrane technology to produce water that meets drinking water quality standards by the Minister of Health Regulation No. 492 of 2010 can be a solution to this problem. The NF270 membrane is a membrane process between reverse osmosis and ultrafiltration, which has a lower flux and operating pressure below 0.2-1.53 Mpa compared to reverse osmosis. Membrane NF270 is used for the reclamation of wastewater, water purification and softening, seawater desalination, and others. Its high rejection of organic molecules with a molecular weight of 200-2000 Da ions and multivalent can remove suspended solids, natural organic matter, bacteria, viruses, salts, and divalent ions contained in water, including coal mine acid water. The purpose of treating acid mine drainage with the NF270 membrane is to remove COD, TSS, TDS, and Fe metals. The NF270 membrane was used in this study to treat the coal mine acid water of PT. Bukit Asam. The performance of the NF270 process was assessed from the effect of pressure (4, 5, and 6 bar) on the flux and rejection rate of each parameter in a single solution, mixed and aqueous coal mine acid solution. The optimum pressure of the NF270 membrane for all parameters was 6 bar. This optimum pressure was then used to compare the phenomenon of flux that occurred and the level of rejection produced in the original sample of coal mine acid water. In the original coal mine acid water, there was a significant decrease in flux due to fouling deposition on the membrane surface. This phenomenon of decreasing flux was caused by fouling and polarization concentration. The rejection rates produced for the parameters of COD, TSS, TDS, and Fe with NF270 membranes were 56.4-93.1%; 78.5-100%; 43-69.3%; 67-100% respectively. Treated coal mine acid water using NF270 membrane technology can be used as drinking water that meets the standards of the Indonesian Ministry of Health Regulation. Thus, NF270 membrane technology can be used to process coal mine acid water into environmentally friendly drinking water.
Highlights
Indonesia has abundant natural resources, especially coal
The NF270 membrane is a polyamide composite membrane consisting of an active polyamide layer of piperazine and trimesoyl chloride (TMC), a polysulfone support layer, and a polyester non-woven layer
Materials The NF270 membrane is a polyamide composite membrane consisting of an active polyamide layer of piperazine and trimesoyl chloride (TMC), a polysulfone support layer, and a non-woven polyester layer
Summary
Indonesia has abundant natural resources, especially coal. One of the coal mining areas in South Sumatra Province is located in Tanjung Enim District, Muara Enim Regency. The mining process changes due to exposure to rock layers. Surface mine water has chemical properties and compositions that change in seasons and Kiswanto, H. Sudarno / JPII 9 (3) (2020) 439-450 after the rainy season. One of the environmental problems in coal mining activities is related to the mine acid water or Acid Mine Drainage (AMD) (Nasir et al, 2014; Afrianty et al, 2012; Ashari et al, 2015). Coal mine acid water contains high amounts of organic contaminants, ammonia, heavy metals, suspended solids (SS), and organic matter (Afrianty et al, 2012; Susanto, 2018; Ashari et al, 2015; Said, 2014)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
