Posted in 3 January 2018, by Mic, kategori News, Research & Service

BPPMAgency for Research and Community Service (BPPM) Faculty of Engineering Universitas Brawijaya (FT-UB) to build the installation mixer biogas digester, in Wajak District, Malang Regency. Dr. Eng. Denny Widhiyanuariyawan, Chairman of BPPM representing FT-UB directly do the coaching.

With the biogas digester process, the methane content in cattle dung can be used for fuel. In addition to biogas, can also be used as liquid fertilizer and solid, thus providing economic value for the community, especially breeders.

For farmers in general cattle, dung is only processed into manure, some even wasted. Whereas cattle dung can be useful products for human, one of them is biogas. This flammable gas is produced by anaerobic activity or fermentation of organic materials including animal feces. Livestock livestock, in this case cattle, contains 40-60% CH4 (methane) and 30-60% Co2 (carbon dioxide).

Denny revealed that BPPM FTUB also makes biogas digester with fixed dome type. The type consists of 3 main components, namely inlet (mixer), dome (digester dome), and outlet (slurry). Mixer serves as a place to mix livestock and water manure on certain comparisons. In addition, mixers also play a role to separate ramen (former grass or straw) from cow dung. This is so that the ramen does not clog the inlet, so it can cause the ramen sedimentation in the dome.

“Between the outlets and dome are given a manhole, which serves as a slurry outlet and for the entrance when draining the dome, if there is a problem with the digester,” said Denny. If the dome is fully loaded with livestock and water manure, and the gas ducts above the dome are closed, the activity of anaerobic bacteria (methanogen bacteria) will produce biogas in the dome.

This biogas pressure will push the slurry on the outlet side. If the biogas is drained, then the slurry at the outlet serves to provide pressure force, so gas will be pushed. “So the working principle of fixed dome digester is in accordance with Pascal Law principle, there is a balance of pressure between the digester with the outlet side,” he explained.

Regarding the cost of manufacture, alumnus Pukyong National University Korea says it does not cost big. For a set of fixed dome biogas digester only cost around Rp. 10 million. During this time BPPM FTUB has made no less than 60 units. The process of making enough dikerjalan by 3 people only, with the workmanship time of about 7 working days, depending on the desired dimensions.

According to Denny, in the process of making always involve the community. BPPM FTUB also provides training on how to make biogas digester, both theory and practice. Taught also on how to care, to how to solve problems that will likely arise. Thus they will be able to create and maintain their own, then transmit their knowledge to others.

People who have utilized this applied technology, apart from the Regency and the City of Malang, also from Wonogiri, Ponorogo, Madiun, Pasuruan, and Probolinggo. “This type of low maintenance so easy to implement, the community just fill the cattle manure,” he explained.

In addition to biogas, Denny said, biogas digester also produces solid and liquid fertilizer. In addition, the solid slurry can be processed for pellet mixture and as a red worm breeding medium. In addition to meeting the needs of household kitchens, biogas can also be used for fuel productive economy. Such as making chips and other productive economies. “Because for a fully charged biogas digester, it can produce biogas for +/- 50 days. And biogas is able to cook for 5-6 hours a day, “he explained.

According to Denny, apart from cow dung and other ruminants, raw materials can also be taken from poultry droppings. Such as the installation of biogas built in Kecamatan Sumberpucung, Malang. Starting from the air pollution caused by sewage waste generated from chicken breeders near the Dam Karangkates it. “The farm is one of the partners assisted by Universitas Brawijaya. Finally, we find the solution by making biogas installation. In addition to the annoying odor problem can be resolved, biogas useful for household needs, “he explained.

Installation of biogas digesters by BPPM FTUB donated to farmers in Wajak District, Malang Regency is the result of cooperation with Petrokimia Gresik. Doctors in the field of Energy and Remote Sensing is hoping, the spirit to treat waste into products that have economic value, will be a ‘virus’ that quickly spread.

“Petrokimia Gresik has many partners in various regions, we also have community assistance program. Hopefully the cooperation that has been established is sustainable. So the development of biogas technology in Indonesia, especially in East Java, could increase,” he concluded. (Made Wirya/ems/red mic)

Adapted fromĀ on January 2, 2018

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