 Garbage is one of major problems in Indonesia. All methods have been applied by government and related institution handling garbage but seemingly it has not shown any significant progress or gained merely minor development. Currently, Indonesia is known as a second-ranking country after China in case of garbage issue. Garbage absolutely deteriorates the environment where it is thrown away leading to water and soil contamination or impede water channel for instance. Frequently, natural disasters may occur such as flood likely in Jakarta and Bandung which also known as high flood intensity rate cities. Getting information about flood makes us concerning that garbage is inevitable problem for people globally.
      Garbage is divided into two types; organic and inorganic. Organic garbage is produced by living organism meanwhile inorganic garbage is produced by abiotic. Several garbage probably degradable and the other ones are not. It arises the pros and cons of producing the not degradable ones about its waste handling which may cause harmful effect. For instance, metal waste is not degradable when it is even buried in soil or thrown away to sea but dangerous impact will appear instead. The best method to deal with this problem is to recycle the metal waste. Scrap is a metal waste that can be recycled easily or moreover up-recycle (value-adding from the old ones) able to be achieved.Â
      Scrap is unused materials that consist of recyclable materials left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap has monetary value, especially recovered metals, and non-metallic materials are also recovered for recycling. All materials made by metallic compound are origin from not renewable resources. Metals can't be separated from human life since we use it in any sectors. As we can imagine if the mining engineer continuously keep going on exploitation activity, it would be a life-threat for future. Minerals reserve underneath our earth will disappear someday if we are lack of knowledge in metal disposal handling.
In Developed Country such as Germany, Finland, and United States have been aware in applying recycle of scrap. In Germany, the broken car, old-fashioned car, and the unused car should be taken to the crusher machine in certain period to be renewed. In USA, the government releases a regulation regarding to scrap recycling and will be paid by cash money depending on type of metals they have. In Finland, they set aside the metal waste depending on its type therefore it helps a scrap recycling company to reproduce the metal without separating the garbage.
Scrap is profitable indeed if we can recycle it well. It will reduce the mining production cost and operation cost. Roughly, one ton of scrap saves 1,115 kg of iron ore, 625 kg of coal, 53 kg of limestone. Hence, instead of exploiting minerals, we can recycle the metal waste. In addition, if the scrap is exposed to air, it releases harmful effect which may cause greenhouse effect because of its dangerous element.
Unfortunately, Indonesia has not applied this technology yet. Only people who study metallurgical engineering and material science recognize that scrap recycling must be done to fulfill human need and save the deposits of mineral in future. Collaboration of related institution must have a partnership to run this program and increase people awareness about scrap recycling simultaneously.
