Oilseeds pretreatment is an important link in the process of biomass energy production, and its difficulties mainly include raw material diversity, cost control and environmental protection requirements.

First of all, one of the difficulties in oilseeds pretreatment is the diversity of raw materials. Different kinds of oilseeds need different treatment methods in the pretreatment process, such as rapeseed, soybean, palm fruit and so on. Therefore, it is necessary to design corresponding pretreatment processes according to different raw material characteristics, including particle size control, moisture regulation, oil extraction and so on. Therefore, effective pretreatment of different kinds of raw materials is a challenging task.
Secondly, cost control is also one of the difficulties in oilseeds pretreatment. In the pretreatment process, a lot of energy and chemicals need to be consumed, and equipment maintenance and management are needed, which will increase the production cost. Therefore, how to reduce the production cost under the premise of ensuring the product quality is an important issue in the optimization of oilseeds pretreatment process.
Additionally, environmental protection requirements also bring challenges to oilseeds pretreatment. A large amount of wastewater, waste residue and waste gas will be produced in the pretreatment process. If these wastes cannot be effectively treated and utilized, it will have a serious impact on the environment. Therefore, how to realize waste resource utilization and emission reduction while ensuring production efficiency is an urgent problem at present.
To sum up, the difficulties of oilseeds pretreatment mainly include raw material diversity, cost control and environmental protection requirements. In view of these difficulties, it is necessary to carry out in-depth research and technological innovation to improve the efficiency and sustainable development ability of oilseeds pretreatment process.