A method for preparing high-quality bio-oil from pig manure

Abstract

The invention provides a method for preparing high-quality bio-oil from pig manure, which is specifically as follows: dry fresh pig manure, add a heavy metal stabilizer with a weight of 5-10% of the raw material of pig manure, pulverize, and sieve to obtain a powdery mixture ; Next, add the powder mixture material and liquefaction solvent into the reactor according to the solid-to-liquid ratio of 0.05-0.150g / mL, and the solvent filling rate of 10-30%; set the pressure of the reactor to 10-15MPa, and the liquefaction temperature to 220°C ~300°C; the reaction kettle is heated up, and when the temperature reaches the set liquefaction temperature, it stays for 30-60 minutes. After the reaction is completed, the heating is stopped and cooled to room temperature; then the solid-liquid separation is carried out to obtain the liquefied product, and finally the liquefied product is put into a rotary evaporator to obtain a high Quality bio oil. The invention prepares bio-oil by sub / supercritical liquefaction treatment of pig manure, which can realize the harmless and resourceful treatment of pig manure, and realize the conversion of active heavy metals in pig manure to relatively stable heavy metals by adding heavy metal stabilizers, reducing the Ecotoxicity and bioavailability of heavy metals.

Description

Technical field [0001] The present invention relates to the field of pig manure treatment, and in particular, to a method of preparing high quality bioe in pig manure as a raw material. Background technique [0002] The pig industry has always been a very important industry in animal husbandry. Pork has always been one of the Chinese people's favorite meat. The annual pork production accounts for 65% of the national meat production, which meets the growing pork growing. Under the demand, the scale of pig industries is also increasing, and the emissions of pig manure are also increasing. According to relevant statistics, the full-year feces emissions (including urine) in 2015 reached 6.554 billion tons, of which pig manure emissions were 3561 million tons, accounting for 54% of total emissions. In order to prevent and treat animal diseases, growth, increase feed utilization, some trace elements, such as copper and zinc, have been widely added to animal feed. These feed additives h...

AI Technical Summary

Problems solved by technology

Therefore, more and more attention has been paid to the technology related to direct liquefaction of biomass to treat pig manure. However, biomass liquefaction technology has relatively high requirements for equipment and operating conditions. Currently, biomass liquefaction technology is still in its infancy.

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