What is the use of waste from hydraulic press pressing walnut oil

The waste of walnut oil extracted by hydraulic press, namely oil residue, has multiple uses, mainly including the following aspects:

Fertilizer

• Nutritious: Oil residue is rich in protein, nitrogen, phosphorus, potassium and other nutrients, which are important nutrients needed by plants.
• Improving soil: After mixing oil residue with other organic matter for composting, it can be converted into efficient organic fertilizers for planting vegetables, trees, or flowers, which can improve soil conditions, enhance soil quality, and improve water retention capacity.
• Environmental protection effect: Using oil residue as fertilizer can also reduce soil erosion and have a positive impact on environmental protection.

Feed

• High protein: Oil residue contains abundant protein and is an important component of feed.
• Widely used: Oil residue can be used as animal feed, providing necessary nutrition for animals, especially in animal husbandry. The utilization of oil residue can reduce feed costs and improve economic benefits.

food

• Ingestibility: Although the taste of walnut oil residue after oil extraction may not be good, in the past when there was a shortage of food and limited supply of edible oil, people used to mix it with flour to make pancakes for consumption. Nowadays, although oil residue is not often used directly as food, it can be used as one of the ingredients for pastries or specialty snacks.

note

• Composting treatment: Oil residue needs to be composted before being used as fertilizer to make the nutrients more easily absorbed by plants and avoid stimulating them.
• Blended use: Oil residue can be mixed with other organic matter such as farmyard manure before application to balance its nutrient content and improve fertilizer efficiency.
• Food safety: Due to the possible presence of residual oil extractants or other chemicals in oil residue, it is not recommended to use it directly for fertilizing food crops.

In summary, the waste produced by hydraulic presses pressing walnut oil has multiple uses, including as fertilizer, feed, food raw materials, and industrial raw materials. In practical applications, it is necessary to choose the appropriate utilization method according to the specific situation.

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