Friedly Enviroment Power Bank From Fruits And Vegetables Waste


The development of the world that is now very quickly followed by the evolution of all existing tools and technologies become increasingly sophisticated. It requires the existence of energy so that all the tools and technology we can use well whenever and wherever. Examples of such energy sources are petroleum (non-renewable energy source) which is processed again into BBM (Fuel Oil). The question is to continuously take petroleum whether petroleum will not run out? The answer is definitely going to run out. The more we take the results of natural wealth on a continuous basis will lead to endless even cause damage to this nature.

In addition, the energy crisis is a very fundamental problem, especially the problem of electrical energy. Electrical energy is an energy that is needed to perform daily activities. Sources of electrical energy derived from coal and petroleum, are not environmentally friendly because it causes air pollution, and to renew it takes a long time. For that new energy sources need to be empowered because the use of fossil-fueled fuel will be exhausted for approximately 17 years

The need for new energy sources is being actively sought and developed along with the development of biotechnology. The search for electrical energy sources is also focused on organic materials that are environmentally friendly, safe for humans, easy to obtain, and can be continuously renewed (Muhammad Imaduddin, 2014. Nareswati Dwi Utari, 2014. and Bustami Ibrahim, 2014). Thus, we must seek and find future renewal energy with an effective, innovative, eco-friendly, and even practical idea that the world will continue to shine until in the future. Fuel cells, geothermal, wind, and light are some examples a source of energy that is being massively developed in the world, but this does not rule out the development of other renewable energy sources such as using energy derived from microbes.

Starting when saw a lot of vegetable and fruit waste in the research area in Jombang Peterongan east Java Indonesia, which became the problem of waste / vegetable and fruit waste contaminate the river around the hut, and clog all the existing drainage. Even to disturb the sense of smell of the residents because the waste is in a number of not too little and rotten. This encourages researchers to make a breakthrough in how we make the waste into useful material and not pollute the environment. Through the waste of vegetables and fruits with the help of yeast tape as MFC (Microba Fuel Cell), it can be realized even though the energy produced is not the main energy source for the present life.

Research purposes
1. Knowing whether liquid waste vegetables and fruits can be processed into a source of renewable alternative energy.
2. Knowing how to make Green Green Bank Eco Friendly with Utilization of Fruit and Vegetable Waste.
3. Knowing the electric voltage generated Green Green Bank Eco-Friendly with Utilization of Fruit and Vegetables Waste with the addition of yeast.

Biofuel Cell Procedure
a. Tools preparation
1. Prepare 2 wooden planks to form a right angle with the glue and given L screws and clamps.
2. Prepare a piece of zinc to form a curve where the beaker is
3. Install the plugs on each cell with a series of cables and crocodile clips.
4. Construct 6 LED lights with parallel arrangement.
5. Install the plug to connect to the lamp.
6. Install the switch.

b. Preparation of materials
1. Smooth the orange peel with a blender.

Friedly Enviroment Power Bank From Fruits And Vegetables Waste
2. Smooth the tomato waste with a blender.
3. Insert orange peel juice into a beaker, measure the potential difference of orange juice to one cell (one cup).
4. Incorporating tomato juice into a beaker, measuring the potential difference of tomato juice for one cell (one cup)
5. Put all orange peel juice into the bottle and then sprinkle 5 yeast grains that have been smoothed into it.

Friedly Enviroment Power Bank From Fruits And Vegetables Waste
6. Put all the tomato juice into the bottle and then sprinkle 5 yeast grains that have been smoothed into it.
7. Closes orange and tomato skin fermented bottles with plastic and rubber.

Friedly Enviroment Power Bank From Fruits And Vegetables Waste
8. Let the material be fermented for 1 week.


Nowadays a lot of waste from vegetables and fruits both comes from household waste as well as from market waste. The waste causes unpleasant odors and invites flies that can cause illness. To reduce the amount of waste fruits that exist in the environment, we can use one of them to be a source of electrical energy. First we look for vegetable and tomato fruits, and orange peel because it contains high acidity and strong electrolyte to produce electrical energy. Then the vegetable and fruit waste we take and pounded or blender until liquid. After that, we put the yeast tape on the mandarin orange peel waste. Giving tape yeast as MFC (Microba Fuel Cell) containing Saccharomyces cerevisiae, Pediococcus sp., Bacillus sp. very helpful in the process of acceleration of the decomposition reaction so as to increase the content of acidic substances in the liquid waste of fruits and vegetables.

Friedly Enviroment Power Bank From Fruits And Vegetables Waste

Based on the results of the experiment showed that vegetable and fruit liquids can produce a voltage of 0.74 volts. This is because if the copper plate reacts with the liquid waste it will produce a positive ion / pole while the zinc plate will produce a negative ion / pole. In accordance with the principle of chemical reactions on the Volta element as follows:

1. In the electrolyte solution there is a reaction H2SO4 → 2H+ +SO4
2. At the positive pole there is a reaction Cu + 2H+polarization H2
3. At the negative pole there is a reaction Zn + SO4 →  ZnSO4 + 2e

We did experiment with the old free variable of fermentation. The length of fermentation we did was 1 day, 2 days, 3 days and 4 days. This is done to determine the level of acidity of vegetable and fruit liquids that affect the electrical voltage generated from each fermentation length. When a mixture of vegetable and fruit waste is fermented for 1 day, it produces a voltage of 0.90 volts. When fermentasikan for 2 days produce a voltage of 0.93 volts. When fermented for 3 days produce a voltage of 0.94 volts. And when fermented for 4 days produce a voltage of 0.96 volts. This shows the duration of fermentation effect on the value of the resulting voltage. The longer the fermentation, the greater the resulting voltage.

Friedly Enviroment Power Bank From Fruits And Vegetables Waste

The second independent variable is the number of cells coupled in series to their voltage values. And obtained a greater value until the series of series of four beaker glass produces a voltage of 3.49 volts and can turn on the LED lights. This is in accordance with GGL induction prinsp which is strung in series.

Biologically, the electric voltage is generated from hydrogen ions derived from NADH resulting from the glycolysis process. The hydrogen ion reacts with 2 fermented acetyldehyds to form ethanol. Hydrogen ion is what causes the voltage that turns on the LED lights. The length of fermentation and the number of hydrogen ions is proportional to the amount of voltage generated. The longer the fermentation time the more hydrogen ions are generated resulting in the greater the electrical voltage. In addition to the electric voltage, the mixture of vegetable and fruit wastes that are strung together this series also produce ethanol, can be proved by the smell of alcohol we found after opening the plastic used to close the beaker glass.
Based on the experiments show that the cells are arranged in series will result in a greater voltage value. The value of the resulting voltage after being installed with the lamp decreases. This is because there is a voltage lost due to obstacles in the system or the inner resistance of the liquid waste materials of vegetables that can be calculated using Ohm’s legal formula obtained;
(R + r) = {V (before string assembly) – V (after lights installed)} / I

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