Sweet potato starch waste, a byproduct of sweet potato processing, makes up approximately 75% of the weight of fresh potatoes. In Hunan Province alone, there are only a few hundred sweet potato starch processing enterprises. Potatoes are one of the most widely cultivated and economically valuable crops globally. About 50% to 70% of the world’s potato production is processed, with developed countries reaching as high as 80%. However, in China, the processing rate remains below 5%, resulting in millions of tons of potato waste generated annually in northern regions each year.
Sweet potato and potato residue are rich in proteins, amino acids, and other essential nutrients. With proper treatment, this waste can be transformed into high-quality animal feed. To address this issue, a new, efficient, and cost-effective solution has been developed—microbial fermentation technology.
This method involves adding a type II feed starter to the potato or sweet potato waste, adjusting the moisture content to around 55%, and then sealing it in a tank, concrete pit, or plastic bag for anaerobic fermentation. Within just three days, the material is converted into high-quality feed. This feed can replace up to 40% of expensive commercial feed in livestock such as pigs, cattle, and sheep, offering a sustainable and economical alternative.
By utilizing microbial fermentation, we not only reduce waste but also create value from what was once considered a byproduct. This innovation supports both environmental sustainability and agricultural efficiency, making it a promising solution for the future of feed production.
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Zhoushan Haiwang Seafood Co., Ltd. , https://www.haiwangseafoods.com