How to make ethanol from agricultural waste


  • 3.1. Physical pretreatment. The first step for ethanol production from agricultural solid wastes is comminution through milling, grinding or chipping.
  • 3.2. Physicochemical pretreatment. Steam explosion is a promising method of pretreatment which makes biomass more accessible to cellulase attack [39].
  • 3.3. Chemical pretreatment. Chemical pretreatment methods involve the usage of dilute acid, alkali, ammonia, organic solvent, SO 2, CO 2 or other chemicals.
  • 3.4. Biological pretreatment. Degradation of the lignocellulosic complex to liberate cellulose can be brought about with the help of microorganisms like brown rot, white rot and soft rot fungi.


How do you make ethanol from waste materials?

Researchers have developed a method for converting crop residue, wood pulp, animal waste and garbage into ethanol. The process first turns the waste material into synthesis gas, or syngas, and nanoscale catalysts then convert the syngas into ethanol.

Can ethanol be produced from agro-waste?

International License. Libraries Resource Directory. We are listed under Research Associations category. This study investigates the potential of ethanol production from agro wastes. Agro waste from hydrolysis was applied to remove li gnin which acts as ph ysical barrier to cellulolytic enzymes.

Can potato waste be converted to ethanol?

With more than two dozen companies in Pennsylvania manufacturing potato chips, it is no wonder that researchers in Penn State’s College of Agricultural Sciences have developed a novel approach to more efficiently convert potato waste into ethanol.

How can biomass be used to make ethanol?

By combining gasification with high-tech nanoscale porous catalysts, they hope to create ethanol from a wide range of biomass, including distiller’s grain left over from ethanol production, corn stover from the field, grass, wood pulp, animal waste, and garbage.

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How is ethanol made from agricultural waste?

The production of ethanol from agro-waste derived from two plants namely sugarcane (Saccharum officinarum) and maize (Zea mays) plant (sugarcane baggasse, sugarcane bark, corncob, cornhusk, and corn husk) involves the pretreatment of the agro-waste using acid hydrolysis to remove the lignocellulosic component to expose …

Can ethanol be made from waste?

To address these concerns, bio-ethanol can be derived from a large variety of residue and waste streams – either by capturing sugar or starch rich waste streams or by using waste fractions of crops (so-called ligno-cellulosic biomass).

Can you make ethanol from food waste?

(18-20) Food waste can also be used as a low-cost feedstock for producing ethanol, (15, 21, 22) which is a more valuable fuel compared to biogas.

How do you make homemade ethanol?

The steps in the ethanol production process include milling the corn to meal, liquefying the meal by adding water and cooking, breaking down starch into sugar, using yeast to ferment the sugar to ethanol, distilling the ethanol by boiling off and condensing it by removing residual water and finally denaturing so that …

How is bioethanol produced?

Bioethanol is typically produced via microbial fermentation of fermentable sugars, such as glucose, to ethanol. Traditional feedstocks (e.g., first-generation feedstock) include cereal grains, sugar cane, and sugar beets.

How is bioethanol made from food waste?

Bioethanol can be produced through fermentation under controlled conditions. Microbial decomposition of vegetable waste generates bioethanol with high humus content. Many researchers have stated that vegetable waste is carbohydrate-rich biomass one of the potent substrates of renewable energy generations.

What is saccharification process?

Saccharification of sugarcane bagasse is the process of conversion of complex carbohydrates (starch) molecules into simpler sugars (Unrean and Ketsub, 2018). Anaerobic absorption is an aggregation of strategies by which microorganisms separate biodegradable material without oxygen.

How does bioethanol work?

Bioethanol fuel is produced from plant-based products. Burning bioethanol results in clean emissions – just heat, steam, and carbon dioxide. Carbon dioxide is absorbed by plant life through photosynthesis. This infinite cycle of creation and energy combustion makes bioethanol a carbon-neutral fuel source.

How do you make organic waste from ethanol?

To achieve this, the conversion of organic waste (Old newspapers) and food waste (maize) were respectively carried out via acid and microbial hydrolysis, which yielded 42% and 63% fermentable sugar wort. This was then converted into ethanol by fermentation process using Sacchromyces ceverisiae.

How is ethanol made step by step?

0:001:43How Ethanol is Made – YouTubeYouTubeStart of suggested clipEnd of suggested clipIt is cooled to 92 degrees and yeast is added the yeast consume or eat the sugars a process calledMoreIt is cooled to 92 degrees and yeast is added the yeast consume or eat the sugars a process called fermentation as the yeast ferment they release carbon dioxide and convert the sugars into alcohol.

What are the two methods of producing ethanol?

Making ethanol by fermentation Ethanol can be produced by fermentation and concentrated using fractional distillation .

Can you make ethanol from grass clippings?

Although Quinn’s MicroFueler is most effective with wastes high in alcohol content, ethanol “can be made out of any waste — lawn clippings, dairy products, old chemicals, cardboard, paper, bruised and discarded apples from the grocery store. It can be fermented and turned into fuel in minutes,” Quinn said.

Bioethanol Technologies

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Waste from the food is a challenge to the environment all over the globe, hence there is need to be recycled. Vegetables and fruits biomass is a resource of renewable energy with significant fuel source potential for the production of electricity and steam, fuel for consumption and laboratory solvents.

1. Introduction

The globe needs urgently to resort another option of sources of energy as a result of the rapid world energy supply exhaustion [ 1 ]. As a result of the depletion in oil, the world global warming and the effects of greenhouse making the earth on the condition of alarming [ 2 ].

2. Saccharomyces cerevisiae

Yeast is described as basidiomycetous or ascomycetous fungi responsible for reproducing through fission or budding and formed spores which are not enclosed in the fruiting body [ 12 ]. S. cerevisiae is the most popular yeast in the production of ethanol due to its wide tolerance of pH making it less susceptible to infection.

3. Fruit wastes as a source of bioethanol

Fresh citrus fruits are consumed or the citrus juice is mostly preserved which it’s in ready form of consumption or concentrated form. After the extraction of citrus fruit juice, the remaining parts of the fruits serve as a rich source of lignocellulosic material and also utilized as a raw material for the fermentation of bioethanol.

4. Vegetable waste as a source of bioethanol

Rotten, peels, shells and a scraped portion of vegetables is one kind of biodegradable vegetable waste that generated in large amounts, usually dumped on ground for rotten near the household area. This act not emits an obscene odor but also creates a big irritation by attracting pigs, rats and bird as well as vectors of various human diseases.

5. Production of bioethanol from dry fruits and vegetable waste biomass

Pretreatment: The pretreatment is the most costly and complicated step in the conversion of LCB into ethanol. The LCB in cellulose is usually sheathed or coated by hemicelluloses resulting in hemicellulose complex cellulose that works as a chemical barrier and attacked and prevent the chances of complex enzymes under its natural condition [ 27 ].


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