Chem-Orions Car Indonesia is the fifth largest tea producer in the world, after India, China, Sri Lanka and Kenya. Production of tea in Indonesia is about ± 1!.!!! tons per years "Source: Food and Agriculture Organization of the United Nations #. $astages such as spent tea had contributed
negati%e i&pacts to the en%iron&ent. 'er&ico&posting ðod is fully utili(ed to &anage the wastes towards a &ore sustainable approach. )he wor&s that are used in the 'er&ico&posting is Lumbricus Lumbricus rubellus. rubellus.
'er&ico&posting is an eco*friendly process whereby wor&s are used to breakdown the organic waste into soil and hu&us known as %er&ico&posting. )o prepare a %er&ico&pose, the soils and spent tea were &i+ed together under percentage of ! soils and ! spent tea. )he soil and spent tea are &i+ed together and the p- %alue is &easured repeatedly until the soil neutrali(es the spent tea. fter the p- %alue is neutral, so&e wor&s are added into the container. )his step is %ery i&portant because wor&s can not li%e in acidic or alkaline &ediu&. )he %er&ico&posting period occurred in 1! days. )he %er&ico&post of wastages has %oltage of electrical energy. /ased on the e+peri&ent, the use of replicated and double co&part&ents of the co&ponent will produce double of %oltage. -ence, for conclusion, this har&less and low cost technology of %er&ico&post can act as a dry cell in order to reduce the usage of ha(ardous che&icals che&icals that can conta&inate conta&inate the en%iron&ent. en%iron&ent. -ea%y &etals that are har&ful to the en%iron&ent and people such as lead "Pb#, chro&iu& "Cr# and cad&iu& "Cd# are not detected in the %er&ico&post. )his pro%es that the %er&ico&post is safe for the en%iron&ent and people. )wo different &etals are used as electrodes and %er&ico&post as electrolyte. )he clip leads wires were connected to the electrodes, %oltage regulator and &ulti &eter in a series circuit. 0ulti&eter is used for &easure %oltage between two electrodes. )o series &ultiple electrode for increase the %oltage, %er&ico&post cell &ust be isolated indi%idually because it cannot be i&&ersed in sa&e container due to short circuit. )hese ele&ents pro%ide ions which can for& che&ical reaction and produce force called electro&oti%e force "02#. )his reaction occurs between the electrodes and the %er&ico&post solution. )he ions inside the solution react with copper and allu&iniu& electrode.
)he )he %er&i %er&ico& co&pos postt can can be used used as an alte altern rnat ati% i%ee ð ðod od to repl replace ace the the che& che&ic ical al electrolytes. s s the %er&ico&posting process is a low cost technology and %ery % ery co&&erciali(e to countries countries around the world, world, this process can be used to produce produce har&less har&less %er&ico&post %er&ico&post which can produce high %oltage and generate electricity. )he ions inside the %er&ico&post react with electrodes to produce high potential difference.
The stopping mechanism works based off the decomposition of hydrogen peroxide into water and oxygen gas with catalase as a catalyst. The catalase is contained within potatoes and catalyzes the decomposition reaction. Before the competition, ground potatoes is stored in the food processor and then poured it into the bottle. Hydrogen peroxide is injected in to the bottle. There are enzyme catalase in the potatoes that speeds up the decomposition. The oxygen from the resulting reaction fills the bottle. There will be a side product as water that can be collected in the water trap. The bottle is connected to syringe. When the competition begin, gate ale opened and oxygen gas from bottle are transferred into the syringe. When the plunger of the syringe expands to a certain point, a button is pressed which shuts off the car motor. !dditionally, at this point the syringe becomes open to the atmosphere so that excess oxygen gas can be released. The rate of reaction is controlled by ariable concentration of hydrogen peroxide. The gas from bottle can be rod by pressure gauge before the gate ale opened. This method allows us to hae a timed stopping mechanism. "ey word # $enewable %nergy, %co &riendly, 'ow (ost )aterial
