Do palm oil mills produce waste? How is it handled?
In the edible oil market, palm oil occupies an important position with its advantages of high yield, low cost and stable performance. Numerous palm oil mills around the world operate day and night to produce a steady stream of palm oil to meet the needs of food, chemical and other industries. However, in the process of palm oil production, the production of waste is inevitable, and these wastes, if not handled properly, will pose a serious threat to the environment and ecology. So, what kind of wastes are produced by palm oil mills? And how to properly handle it? First, the generation of palm oil mill waste Palm oil production process is complex, from the harvesting of oil palm fruits to the final refining of palm oil, each link may produce waste. In the pressing of oil palm fruits, a large amount of pressing waste will be generated, mainly including palm fruit fiber and palm kernel shell. Palm fruit fiber is tough and is the fibrous tissue between the pulp and kernel of the oil palm fruit; palm kernel shell is the hard shell that covers the palm kernel. These waste residues are huge in size, and if they are piled up randomly, they not only occupy a lot of land, but also easily breed mosquitoes and spread diseases. The palm oil after pressing contains impurities, which need to be refined. The refining process produces wastewater, known as palm oil mill effluent (POME). This wastewater is rich in organic matter, suspended matter, oil and grease, and acid, and has extremely high chemical oxygen demand (COD) and biochemical oxygen demand (BOD), which, if discharged directly into natural water bodies, will lead to eutrophication of the water body, depleting the water’s dissolved oxygen and causing aquatic organisms, such as fish, to die…