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All Journal Jurnal Teknosains agriTECH Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Indonesian Journal of Chemistry Agroindustrial Journal Agroindustrial Technology Journal (ATJ)

Wagiman Wagiman

Departemen Teknologi Industri Pertanian, Fakultas Teknologi Pertanian, Universitas Gadjah Mada, IndonesiaJl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Author-ID : 2869686

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Articles

A Tofu Wastewater Treatment with A Combination of Anaerobic Baffled Reactor and Activated Sludge System Wagiman Wagiman; Ag. Suryandono
agriTECH Vol 26, No 1 (2006)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Tofu wastewater contained high organic matters and relatively fluctuated in Chemical Oxygen Demand (COD) of about 5.000 to 8.000 mg/L. A Combination of Anaerobic Baffled Reactor (ABR) and Activated Sludge System was very useful to reduce organic matter and produce higher quality effluent. The continuous operation mode was effective in treating the tofu wastewater at COD below 5.000 mg/L, while efficiency improvement was needed for COD 5.000 mg/L or more. The Batch operation mode might be applied but it should take 11 days hydraulic retention time to match the standard condition. The result also showed that at COD standard point of 100 mg/L, the nitrogen concentration decreased with 80-95 %. The nitrogen removal in the aerobic condition was observed most among other removals, because microorganisms took it as their matrix. In addition, there was an increase in pH from 5,0-6,0 to 7,0 â€“ 7,5 meaning thet there would be an improvement in effluent safety.

Optimization of Production Process of Nano-Calcium Oxide from Pinctada maxima Shell by Using Taguchi Method Kendri Wahyuningsih; Jumeri Jumeri; Wagiman Wagiman
Indonesian Journal of Chemistry Vol 19, No 2 (2019)
Publisher : Universitas Gadjah Mada

West Nusa Tenggara is a center of sea oyster farming for Pinctada maxima in Indonesia. The calcium carbonate (CaCO3) compounds in the shell are one of the decomposed natural minerals to produce calcium oxide (CaO) compound which is able to be used as an alternative heterogeneous catalyst in nanometer scale. This research aims to discover the control factors which influence the production process of nanometer-scaled CaO heterogeneous catalyst and choose the best condition in its production process with a better-quality product. Calcined pearl shell (P. maxima) powder is milled by using Shaker mill. The experimental design is performed by using Taguchi method with an orthogonal matrix consisting of 4 control factor variables, i.e. milling time, ball-to-powder weight ratio, the diameter of milling beads and extent of milling the vial. The selection of best control factor variable combination is computed by using multiresponse loss function. ANOVA analysis shows that the product quality parameter of nano-calcium oxide is influenced by all experiment factors. Multi-response loss function analysis results an optimum factor and level combination under process condition happens during the duration of 3 h milling, the ball-to-powder weight ratio is 1:10, the diameter of milling beads is 5 mm and 55% extent of filling the vial.

Synergy of Lean and Green for Improving Small-Scale Agroindustry Performance Muslikah Desti Kurniasari; Nafis Khuriyati; Wagiman Wagiman
Agroindustrial Journal Vol 6, No 2 (2019)
Publisher : APTA and DTIP FTP UGM

Small Medium Enterprises (SMEs) play an important role in the economy of Indonesia. It contributed to the 21.20% of national total economy. Global competition is a challenge and an opportunity for SMEs including agroindustry sector. Therefore, it is needed for strengthening their competitiveness. In the midst of this effort, the raising concern about environment issue has increased. This research aims to determine the alternatives or options in production aspect based on lean and green for small-scale crackers industry. Sustainable Value Stream Mapping (SVSM) was applied to describe the production condition and identify wastes from lean and green point of view. Furthermore, Value Stream Analysis Tools (VALSAT) and Life Cycle Impact Assessment (LCIA) were used to analyze waste throughout the production activity. The results show that the small-scale cracker industry has already implemented synergy of lean and green, however some alternatives for reducing lead time and waste are needed such as demand forecasting and improvement of working methods

Biogas Production from Tofu Waste to Improve the Environmental Performance of Tofu Industry Wagiman Wagiman; Icha Rizkia Ardaniswari; Welly Prakoso Nugravianto
Agroindustrial Journal Vol 7, No 1 (2020)
Publisher : APTA and DTIP FTP UGM

The tofu industry produces solid waste and wastewater that still contain high protein which suitab le as raw material for biogas. Conversion of waste into biogas will contribute to improving the en vironmental performance of small and medium scale industries to increase the added value for the industry. This research was aimed to develop biogas production process by utilizing wastewater a nd solid waste from tofu industry. There were three stages of process development: biogas product ion from wastewater (as control), biogas production from solid waste, and biogas production from a combination of solid waste and wastewater. The results of the production process were evaluate d based on the volume and its added value on both financial and environmental performance. The output from this research was the model of solid waste and wastewater processing for small and medium scale tofu industry. The result showed that the addition of solid waste of tofu and the sour ce of microorganisms from cow manure was able to produce much larger volume of biogas as muc h as 715 ml in shorter time of 7 days. Another result of this research was to make a better environ ment in tofu industry which is seen from the aspects of health and aesthetic.

Analytical Hierarchy Process of Instant Chocolate Drink Development based-on Consumer Preferences Moh Wahyudin; Wagiman Wagiman; Vivi F Khulsum
Agroindustrial Journal Vol 7, No 2 (2020)
Publisher : APTA and DTIP FTP UGM

Instant chocolate drink is chocolate powder in sachet packaging that has been accompanied by additional ingredients and is easy to consume. Sales competition between products has a determining factor in product selection by consumers and needs to be analyzed on factors that influence consumers to buy. This study aims to find out what are the priority attributes of decisionmaking in willingness to buy instant chocolate drinks. The method used in this research is the Analytical Hierarchy Process (AHP) approach, by arranging the problems hierarchically and then weighting and ranking priorities obtained from the results of distributing questionnaires aided by processing using the Super decision 2.0 application. Based on the results, there are seven (7) subattributes that could be influence consumers in buying an instant chocolate drink: originality taste, affordable prices, product quality, additional flavors, packaging visualization, producers of instant chocolate drink should be able to maintain the originality taste because it becomes the final factor in purchasing decisions. Beside the original taste, producers should be able to maintain affordable prices and not experience an increase in sales prices.

Analisis potensi penerapan teknologi produksi bersih pada c-maxi alloycast, Yogyakarta Dewi Masri; Wagiman Wagiman; Bertha Maya Sopha
Jurnal Teknosains Vol 12, No 1 (2022): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/teknosains.67962

CV C-Maxi Alloycast is an industry engaged in the manufacture of household appliances (pans) made of aluminum which is located in Yogyakarta. The aim of the study was to identify the potential application of clean production principles in CV C-Maxi Alloycast. The methods used were production process mapping, waste analysis through liquid waste testing and potential analysis of clean production principles. The results obtained for the production process were smelting aluminum and scrap, pouring molten metal into molds, lifting molds and providing coolant, lifting castings, turning, filing, quality control, storage and distribution. Based on the laboratory test, the characteristics of the liquid waste produced by the CV C-Maxi Alloycast were pH 8.9; COD 52.1 mg/L; BOD 21.4 mg/L; TSS 6660 mg/L; Fe 4,2440 mg/L; Cu 0.0130 mg/L; and Zn 0.0893 mg/L. All parameters indicate that the value meets the quality standard, but the TSS content did not meet the NAB (Threshold Value) which refers to the Regulation of the Minister of the Environment of the Republic of Indonesia No. 5 of 2014 and the Regulation of the Special Region of Yogyakarta (DIY) No. 7 of 2016. Clean production opportunities were: good housekeeping, application of 3R (Reduce, Reuse, Recycle) on solid waste, construction of B3 Waste TPS and capacity building of human resources. Environmental performance had increased based on the Green Industry Standard (SIH) from level 1 to level 2 with a value of 53% to 65% with the implementation of clean production. The economic performance of implementing clean production gains a profit of Rp. 77,412,000,-/year, then the second alternative, namely recycling aluminum scrap is an economical alternative to clean technology with a 5-year NPV value of Rp. 37,853,056,558,- Implementing clean production can have a positive impact on the environment and the economy.

Community Empowerment in Transforming Household and Agricultural Waste into Valuable Products towards the Green Village Concept Arita Dewi Nugrahini; Makhmudun Ainuri; Wagiman Wagiman; Rosa Amalia; Surani Hasanati
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 9, No 2 (2023): June
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpkm.79295

It is essential to manage waste in an integrated manner, beginning at the domestic and village levels. In fact, there are still a significant number of residents who throw trash carelessly. Jurangjero village, a village in Klaten Regency, Central Java, is an example of a village that does not adequately manage its waste. In addition, the village has agricultural waste issues that require optimal utilization, including rice straw. This community service program aims to increase public awareness of organic and inorganic domestic waste management and agricultural waste management so that they can be applied appropriately to the concept of the green village. The program’s methods included field observations, waste management outreach, and training. The training included the creation of organic fertilizers, eco-bricks, plastic waste containers, and straw paper. Farmer groups and farmer women’s groups have gained an understanding of the management of domestic organic waste into organic fertilizer and compost as a result of the outreach and training activities. Karangtaruna has also gained an understanding of inorganic waste management by applying the recycling concept, which entails transforming plastic refuse into plastic pots and ecobricks. They have also grasped the production of economically valuable art paper from rice stalks. The descriptive analysis revealed that the average pre-test and posttest scores were 55.58 and 76.67, respectively. Based on these findings, it can be concluded that this community service program has increased residents’ knowledge of managing domestic and agricultural waste to create valuable products. The support of the village administration is required for sustainable waste management and the continuation of empowerment initiatives.

Effect of Addition of Palm Oil Empty Bunch Ash on Biogas Production from Palm Oil Mill Effluent Clinton Velly Purwanto; Wagiman Wagiman; Jumeri Jumeri
Agroindustrial Technology Journal Vol. 7 No. 2 (2023): Agroindustrial Technology Journal [ATJ]
Publisher : Universitas Darussalam Gontor

Show Abstract | Download Original | Original Source | Check in Google Scholar

Palm oil mill effluent (POME) and empty palm fruit bunches (EPFB) are the waste with the largest amount of capacity resulting from the processing of the palm oil industry. POMEhas a high organic content that can be used as a biogas producer. This study used POME, EFB and cow dung as ingredients to produce biogas using an anaerobic batch digester with a volume of 20 liters, where each experiment had a different material composition and the addition of a different concentration of tankos ash solution. The purpose of this study was to determine the appropriate concentration of mixing a solution of tankos ash, POME, and cow dung in an effort to increase biogas production. The results showed that from several experiments that had been carried out during 30 days of observation, the experiment that had the highest value of biogas production and methane gas revenue was the experiment with a composition of 5 liters of cow dung, 5 liters of POMEand 10 liters of tankos ash solution (1:1:2) has a biogas production value of 58,646 ml and CH4 methane gas revenue of70.1%. It was concluded that the addition of tankos ash solution can significantly increase the pH of the waste digester and can increase the amount of biogas production with a certain concentration

Co-Authors Ag. Suryandono Arita Dewi Nugrahini Bertha Maya Sopha Clinton Velly Purwanto Dewi Masri Icha Rizkia Ardaniswari Jumeri Jumeri Jumeri Jumeri Kendri Wahyuningsih Makhmudun Ainuri Moh Wahyudin Muslikah Desti Kurniasari Nafis Khuriyati Rosa Amalia Surani Hasanati Vivi F Khulsum Welly Prakoso Nugravianto

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