Co-production method for preparing ethanol, biogas and biodiesel by using organic waste

Abstract

The present invention provides a method for co-producing ethanol, biodiesel, biogas and other biological energy sources by using organic waste as a raw material. The method comprises that: a lignocellulose raw material is pretreated, enzymolysis sugar production and ethanol fermentation are performed, livestock and poultry manure is added to the enzymolysis residue, anaerobic fermentation is performed to produce biogas, the biogas residue is converted through saprophagous insects, organic wastewater is adopted to culture microalgae, and the insects and the microalgae are adopted to prepare the biodiesel; and an energy source plant conversion and utilization system is adopted to collect the process wastewater, the biogas liquid, the waste gas, the biogas residue and other solids and separate and enrich the biogas process carbon dioxide so as to be used for culture of sweet sorghum, sugar cane and other sugar-containing energy source plants, purple sweet potato and other starch-containing energy source plants, aspen and other cellulose-containing energy source plants, and sapium sebiferum and other grease-containing energy source plants, and the biomass produced by the energy source plants can further be used for extracting sugar sources, starch, fat and cellulose for biological energy source production.

Description

technical field [0001] The invention belongs to the technical field of bioenergy preparation, and in particular relates to a method for preparing bioethanol, biogas and biodiesel from organic waste. Background technique [0002] my country's current development in the field of biomass energy has made remarkable achievements, but with the rapid development of the national economy and the improvement of people's material living standards, my country's demand for energy has also increased sharply, and at the same time it has put forward higher requirements for the living environment . The huge population determines that my country cannot follow the same route as developed countries in the development of bioenergy. Considering my country's unique national conditions, actively expand new sources of raw materials for biomass energy, accelerate the utilization of waste biomass resources, combine organic pollutant treatment with the production of bioenergy products such as bioethano...

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Problems solved by technology

There are also technical reports involving the integrated production system of biogas and bio-organic fertilizer, but there is no report on the use of straw crop straw pretreatment for enzymatic hydrolysis to produce sugar. After ethanol fermentation, add livestock and poultry manure to the enzymatic residue to produce biogas through anaerobic fermentation. , biogas residues are transformed by scavenging insects, insect fat is used to prepare biodiesel, organic wastewater is used to cultivate microalgae, biodiesel, and the insect body after fat extraction can be used as protein feed, and the remaining residue can be used as organic fertilizer

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