JURNAL PETERNAKAN INTEGRATIF Feasibility Study on the Application of Biogas from Buffalo Faeces as Source of Energy on Coffee Shops

. This study aims to investigate whether bio gas from buffalo faeces can be used as a new substitute energy for other energy sources namely LPG gas and kerosene for coffee shop. This research was conducted at the coffee shop owned by Mr. Saragih in Lumban Suhi-suhi Village, Pangururan District, Samosir Regency, from April to June 2018. This research was a feasibility study using bio gas as an energy source for cooking. Then calculated financial analysis and observed with SWOT analysis. Parameters observed were production costs, revenues, income, Benefit Cost Ratio (B / C), Revenue Cost Ratio (R / C), Return On Investment (ROI), Break Even Point (BEP), and SWOT Matrix. The results of financial analysis were calculated using the bio gas unit, namely the production cost of Rp 2,167,000; revenue of Rp. 4,360,000; income of Rp. 2,193,000; B / C is 1.01, R / C is 2.02; ROI of 50.3%; BEP Price is Rp. 3,976; BEP Production of 270 glasses. Development strategies included promoting bio-gas devices to the community, improving service in coffee shops, improving product quality, making coffee shops that are modern and unique from others, and making faeces banks.

jobs and employment, developing the economy of tourism destinations, tourism governance and ecosystems, local satisfaction with tourism, energy management, water management, liquid waste management, and solid waste management [2] .
Most of the people's livelihoods in Samosir Regency are farmers and breeders. The livestock that many people maintain in Samosir Regency are buffalo and goats. The population of buffalo reached 28,181 and goat reached 9700 in 2015 [3]. The utilization of livestock waste there has not been utilized properly by farmers. Buffalo waste is an organic material that is easily biodegradable, so if not managed properly causing environmental pollution both biologically, chemically and physically.
Improper management of livestock waste can cause pollution of water, soil and air, impact on decrease in environmental quality, quality of life of farmers and their livestock, and can lead to social conflict [4]. Good waste management, besides being able to prevent environmental pollution, also provides economic value to livestock business. One of the uses of livestock faeces is as a source of bio-gas energy and liquid fertilizer/slurry [5]. This research investigated a new way for coffee shop to find new energy instead of LPG or kerosene by using biogas.

Material and Methods
This research was carried out in a coffee shop owned by Mr.Saragih in Lumban Suhi-suhi Village, Pangururan District, Samosir Regency, North Sumatra Province, The study lasted for 2 months, starting from April 2018 to June 2018.
The type of research was a feasibility study. Business feasibility study is an activity that studies about a business that will be carried out, in order to determine whether or not that business [6]. Feasibility studies help to find approaches, and alternative solutions for practicing an idea [7]. From the definition above, a feasibility study was conducted including financial aspects and SWOT on one of Pak Saragih's coffee shops in Lumban Suhi-suhi Village, Pangururan District, Samosir District, using

JURNAL PETERNAKAN INTEGRATIF
3 bio gas as an energy source for cooking. Then calculated in financial analysis and observed with a SWOT analysis [8].

Method of data collecting -Primary Data Collection Techniques
The primary data collection technique is the technique of collecting data directly (surveys) to coffee shops, knowing the types of energy sources used and dishes and drinks sold. This technique can be done by interviews and unstructured observations.

-Secondary Data Collection Techniques
Secondary data collection techniques are data collection techniques obtained through library materials to support the completeness of primary data. Secondary data collection techniques can be done by documentation studies and library studies.

Implementation of Research
-Prepare everything needed during surveys such as questionnaires, data books, and stationery.
-A preliminary survey was conducted to determine the circumstances and situation of the research environment.
-Surveys and interviews were conducted around coffee shop that were selected and interviews were conducted with coffee shops using questionnaires.
-Tabulation of data: Data that has been obtained from the survey results are collected and arranged well to facilitate data analysis.
-Data Analysis: Data that has been collected is then analyzed to become an information for research.
-Summarize Data: Data that has been analyzed is then concluded to be a summary of the information needed in the study [9]. According to [5], the strategic factors of a company can be concluded by combining external strategic factors with internal strategic factors into a summary analysis of strategic factors.

Bio Gas Unit
The bio gas unit that has been installed at the location of Mr.Saragih's coffee shop is 4 x 1 m. The construction of the bio gas unit installed was a plastic biodigester. The bio gas unit was placed in a hole 50 cm deep and 1.5 m wide. The contents of the bio gas unit was buffalo faeces and water.
Comparison of faeces and water is 1: 2. After processing for 30 days, bio-gas was produced. There are several coffee shops that do not have livestock so they cannot get faeces from livestock to be used as bio-gas energy material.

Comparison Results of Financial Analysis of Biogas Energy Used, LPG Gas and Kerosene
b. Location of Coffee shop was not strategic because around the coffee shop is an agricultural area and far from the city center.   service at coffee shops, improving product quality, making coffee shops that are modern and unique from others, using modern coffee machines and making faeces banks.