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Cendekia, Devy
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Public Health Social Sciences

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Formation of Phosphate Crystals from Cow Urine Using Aeration System Batch Reactor Fadilah, Reza; Hanifah, Windia; Cendekia, Devy; Ramandani, Adityas Agung
CHEMICA: Jurnal Teknik Kimia Vol. 10 No. 2 (2023): August 2023 [Available online since October 02, 2023]
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v10i2.26595

Abstract

The waste generated from the livestock sector is cow urine containing nitrogen, sulfur, phosphate, ammonium, sodium, manganese, iron, silica, chlorine, magnesium and calcium. The aim of this research is to reduce phosphate levels which will have an impact on the environment caused by cow urine which contains phosphate and ammonium and forms phosphate crystals using a batch reactor with an aeration system. The results of wastewater treatment using a batch reactor produce precipitate in the form of phosphate crystals which can be used as fertilizer for plants. This study used a completely randomized design (CRD) with two repetitions, namely with a comparison of the rate of aeration (air flow) 1 Lpm, 1.5 Lpm and 2 Lpm with the time used, namely 0 minutes, 60 minutes, 120 minutes, 180 minutes and 240 minute. Based on research that has been done, the highest aeration rate (air flow) in phosphate removal in cow urine waste is at 1 Lpm air flow with a time of 240 minutes and a phosphate removal efficiency of 84.8822%. Meanwhile, at an air flow of 1.5 Lpm with a time of 60 minutes and a phosphate removal efficiency of 95.4315%. At an air flow of 2 Lpm with a time of 240 minutes, the removal efficiency can only be 34.3421%. The content of phosphate crystals obtained from the XRF results was obtained at 3.173%. At an air flow of 2 Lpm with a time of 240 minutes, the removal efficiency can only be 34.3421%. The content of phosphate crystals obtained from the XRF results was obtained at 3.173%. At an air flow of 2 Lpm with a time of 240 minutes, the removal efficiency can only be 34.3421%. The content of phosphate crystals obtained from the XRF results was obtained at 3.173%.
Utilization of Bamboo Waste by Engineering Acid Hydrolysis (H2SO4) to Produce Furfural Compounds Fitri, Nur Hidayatul; Ramandani, Adityas Agung; Cendekia, Devy; Teguh, Dedi
CHEMICA: Jurnal Teknik Kimia Vol. 10 No. 2 (2023): August 2023 [Available online since October 02, 2023]
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v10i2.26609

Abstract

Bamboo waste containing lignocellulosic can be used as a material for forming furfural compounds. Furfural is an intermediate product that is widely needed by the chemical industry in the manufacture of finished products such as resins, disinfectants, lubricating oils, synthetic rubber, and so on. This product can be produced from materials containing pentosan. The purpose of this study was to determine the effect of the delignification process on pentosan levels,yield and characterization of the resulting furfural, as well as the potential of pentosan to become furfural compounds. In this study the formation of furfural from bamboo waste was carried out using the acid hydrolysis method, with the independent variables namely cooking temperatures of 90 oC, 100 oC and 110 oC, H2SO4 concentrations of 5%, 10% and 15% and cooking times of 60 minutes, 90 minutes , and 120 minutes. Based on the results of research that has been done, it is known that the delignification process has an influence on the pentosan level, where the sample without delignification obtained a pentosan level of 11.10% and using the delignification process obtained a pentosan level of 14.67%. Characterization of furfural analysis results by color test showed a change in color to red and based on the results of GC-MS analysis at retention time 24.
Industrial wastewater treatment using venture injector type Micro-bubble aeration as a reduction of dissolved Iron (Fe2+) levels Efendi, Dimas Amirul Mukminin Nur; Ramandani, Adityas Agung; Cendekia, Devy; Hanifah, Windia
Journal of Natural Sciences and Mathematics Research Vol. 9 No. 2 (2023): December
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

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

Abstract

Water quality problems that are often encountered, especially by-product wastewater resulting from industrial processes that do not meet the requirements for wastewater quality standards. Iron levels in wastewater can cause the water to turn brownish yellow and produce an unpleasant odor, which of course has a big impact on the environment. Therefore, it is necessary to implement a treatment process to reduce the iron level in the water, ensuring that the water is safe when discharged into the environment. The purpose of this research is to analyze the initial parameters of temperature, pH, TDS, TSS, dissolved oxygen (DO) and dissolved iron (Fe2+) in industrial waste water and then wanted to know whether the venture injector type micro bubble aeration process was able to increase the value of dissolved oxygen (DO) and decrease the dissolved iron content (Fe2+) in wastewater and to know the micro bubble type aeration process Venture injectors are the best to use. The research was conducted with an experimental design using a completely randomized design (RAL) with two factors: air flow (2 LPM, 4 LPM, and 6 LPM) and aeration time (0 minutes, 15 minutes, 30 minutes, 45 minutes, and 60 minutes), each with two repetitions. In the results of the initial parameter analysis, the pH value was 8.02 (alkaline), the temperature value was 28°C, the TDS value was 1548.3 mg/L, the TSS value was 291 mg/L, the DO value was 0.1 mg/L and dissolved iron (Fe2+) of 7.453 mg/L. After conducting research, it was found that the venture injector type micro bubble aeration process was able to increase the value of dissolved oxygen (DO) and reduce dissolved iron (Fe2+) in industrial waste water, the best increase in dissolved oxygen (DO) at 6 LPM air flow for 60 minutes was able to increase oxygen dissolved (DO) to 2.40 mg/L. The most efficient and effective reduction in the value of dissolved iron (Fe2+) at 6 LPM air flow with a time of 15 minutes was able to reduce the value of dissolved iron by 84.42%.
Co-Authors A. Sidik, M. Muhayin Adib, Asraf Wa Afifah, Dian Ayu Aji, Salomo Pranata Alvita, Livia Rhea Dewi Ermaya Efendi, Dimas Amirul Mukminin Nur Elsyana, Vida Fadian Farisan Silmi Fadilah, Reza Fatahillah Fitri, Nur Hidayatul Hanifah, Windia Herlambang, M. Julian Indradewa, Rhian Ira Novita Sari Phelia, Arlina Purnani, Mawar Siti Putri, Cynthia Eka Ramandani, Adityas Agung Sari, Nita Pita Sarono Shintawati shintawati, shintawati Sri Astuti Teguh, Dedi