Jurnal Kimia dan Rekayasa最新文献

{"title":"The Influence of Zeolite Addition into Anaerobic Vinasse Treatment Process in Microaerated Batch Reactor","authors":"Umul Lailatul Jannah, Gregorius Prima Indra Budianto","doi":"10.31001/jkireka.v1i1.10","DOIUrl":"https://doi.org/10.31001/jkireka.v1i1.10","url":null,"abstract":"Microaeration and cell immobilization are two ways to improve the performance of vinasse anaerobic treatment. Several variations of vinasse anaerobic process were conducted to approach the effectivity of microaeration and cell immobilization addition in 200 ppm vinasse anaerobic treatment process. The variation of (R1) microaeration addition; (R2) zeolite addition as cell immobilizer; (R3) combination microaeration and zeolite addition and (R4) blank reactor – anaerobic reactor without microaeration and zeolite addition. The process was conducted in batch mode, pH in 7. During the process, gas volume was calculated by water replacement concept and sampling was done for analytical such as Volatile Solids (VS) and methane concentration. The result, combination between microaeration and zeolite addition was obtained the lag phase to be shorter while the biogas productivity and VS degradation rate were obtained the insignificant difference value with reactor with zeolite addition and reactor with microaeration addition respectively.\u0000\u0000Abstrak\u0000Beberapa variasi proses dilakukan untuk menakar sejauh mana efektifitas mikroaerasi dan imobilisasai sel pada proses pengolahan limbah vinasse 200 ppm secara anaerob, variasi tersebut diantaranya (R1) reactor dengan mikroaerasi, (R2) reactor dengan penambahan zeolite, (R3) reactor dengan penambahan mikoraerasi dan zeolite (R4) reactor control – tanpa penambahan mikroaerasi dan zeolite. Proses dijalankan pada kondisi pH 7, mode batch. Selama proses, pengukuran volume biogas dilakukan dengan konsep water replacement dan pengambilan sampel dilakukan untuk kebutuhan analisis Volatile Solids (VS) dan kadar metana. Hasilnya, penambahan zeolite pada reactor dengan mikroaerasi menghasilkan masa aklimatisasi tersingkat sedangkan produktivitas dan laju penunuran VS tidak berbeda signifikan masing-masing dari reactor dengan zeolite dan reactor dengan mikroaerasi.","PeriodicalId":107274,"journal":{"name":"Jurnal Kimia dan Rekayasa","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123689529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical Oxygen Demand (COD) Analysis Ink Printing Waste Water Using Titrimetry Method","authors":"Dian Khristiani Suhari, P. Pujiastuti","doi":"10.31001/jkireka.v1i1.9","DOIUrl":"https://doi.org/10.31001/jkireka.v1i1.9","url":null,"abstract":"The printing industry produces wastewater from the ink used. Contains organic and inorganic pollutants such as lead, cadmium, chromium and zinc. Having a quality that exceeds the quality standards for wastewater. If it is discharged into the environment it can pollute the receiving water body. Need to do an analysis of organic pollutant content, by measuring the parameters of Chemical Oxygen Demand (COD). Determination of COD numbers in printing industry wastewater ink using titrimetry method (SNI 6989.73: 2009). Perform oxidation-reduction titration using Ferro Ammonium Sulfate (FAS) solution in printing industry ink wastewater. This study conducted three sampling replications. The results of the first day research obtained a COD rate of 33,088 mg /L; second day 69,694.6 mg /L; third day 67,830.4 mg /L. All three samples had COD figures exceeding the printing industry wastewater quality standard of 125 mg / L. Printing industry wastewater is not suitable to be discharged into the environment.\u0000\u0000Abstrak\u0000Industri percetakan menghasilkan limbah cair dari tinta yang digunakan. Mengandung polutan organik dan anorganik seperti timbal, kadmium, kromium, dan zink. Memiliki kualitas yang melebihi baku mutu air limbah. Apabila dibuang ke lingkungan dapat mencemari badan air penerima. Perlu dilakukan analisis kandungan polutan organik, dengan mengukur parameter Chemical Oxygen Demand (COD). Penentuan angka COD pada air limbah tinta industri percetakan dengan menggunakan metode titrimetri (SNI 6989.73:2009). Melakukan titrasi oksidasi-reduksi menggunakan larutan Ferro Amonium Sulfat (FAS) pada sampel air limbah tinta industri percetakan. Penelitian ini melakukan tiga kali ulangan sampling. Hasil penelitian hari pertama diperoleh angka COD sebesar 33.088 mg/L; hari kedua sebesar 69.484,6 mg/L; hari ketiga sebesar 67.830,4 mg/L. Ketiga sampel memilik angka COD melebihi baku mutu air limbah industri percetakan sebesar 125 mg/L. Air limbah tinta industri percetakan tidak layak dibuang ke lingkungan.","PeriodicalId":107274,"journal":{"name":"Jurnal Kimia dan Rekayasa","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127153402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis Of Preservatives in Jelly at Traditional Markets","authors":"Dinar Wahyu Utami, P. Darmawan","doi":"10.31001/jkireka.v1i1.7","DOIUrl":"https://doi.org/10.31001/jkireka.v1i1.7","url":null,"abstract":"Jelly is a processed food product from seaweed that is given fruit juice, sugar and water and has a semi-solid but chewy texture. Jelly producers add food preservatives to maintain quality and extend shelf life. Permitted preservatives and commonly used for jelly products are sodium benzoate, potassium sorbate and sulfur dioxide. Each preservative is regulated the maximum limit of its use in the Head of BPOM RI Regulation No. 36 of 2013. This study aims to determine the content and levels of preservatives contained in jelly products.Qualitative analysis was carried out on preservatives of sodium benzoate, potassium sorbate and sulfur dioxide whether found in jelly products sold in traditional markets in the District of Jebres, Surakarta. Furthermore, quantitative analysis was carried out to determine the levels of preservatives contained in jelly agar products. Quantitative analysis of preservatives in jelly products by titrimetry and HPLC methods.The results showed that of the four jelly samples analyzed, there were three positive jelly samples containing sodium benzoate preservative with each Jelly A level of 688,559 mg / kg; Jelly B is 488,161 mg / kg and Jelly C is 139,711 mg / kg. There are 2 samples of jelly that do not meet the quality standards according to the Head of BPOM RI Regulation No. 36 of 2013 ie samples of Jelly A and Jelly B because more than 200 mg / kg.\u0000\u0000Abstrak\u0000Jelly agar merupakan produk olahan pangan dari rumput laut yang diberi sari buah-buahan, gula dan air serta memiliki tekstur setengah padat namun kenyal. Produsen jelly agar menambahkan bahan pengawet makanan untuk mempertahankan kualitas dan memperpanjang umur simpan. Bahan pengawet yang diperkenankan dan biasa digunakan untuk produk jelly agar adalah natrium benzoat, kalium sorbat dan belerang dioksida. Masing-masing bahan pengawet tersebut diatur batas maksimum penggunaannya dalam Peraturan Kepala BPOM RI No. 36 Tahun 2013. Penelitian ini bertujuan untuk mengetahui kandungan dan kadar pengawet yang terdapat pada produk jelly agar. Analisis kualitatif dilakukan terhadap bahan pengawet natrium benzoat, kalium sorbat dan belerang dioksida apakah terdapat pada produk jelly agar yang dijual di pasar tradisional di Kecamatan Jebres, Surakarta. Selanjutnya dilakukan analisis kuantitatif untuk mengetahui kadar bahan pengawet yang positif terdapat pada produk jelly agar. Analisis kuantitatif bahan pengawet pada produk jelly agar dengan metode titirimetri dan HPLC. Hasil penelitian menunjukkan dari keempat sampel jelly agar yang dianalisis, terdapat tiga sampel jelly agar yang positif mengandung bahan pengawet natrium benzoat dengan kadar masing-masing Jelly A sebesar 688,559 mg/kg; Jelly B sebesar 488,161 mg/kg dan Jelly C sebesar 139,711 mg/kg. Terdapat 2 sampel jelly agar yang tidak memenuhi baku mutu sesuai Peraturan Kepala BPOM RI No. 36 Tahun 2013 yaitu sampel Jelly A dan Jelly B karena lebih dari 200 mg/kg.","PeriodicalId":107274,"journal":{"name":"Jurnal Kimia dan Rekayasa","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124994463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Nutrient And CO2 Change to Spirullina sp. Growth Cultivation","authors":"Widia Arrifa Asna, Sumardiyono","doi":"10.31001/jkireka.v1i1.8","DOIUrl":"https://doi.org/10.31001/jkireka.v1i1.8","url":null,"abstract":"Spirulina sp. is a microalgae recently being developed because of its functions and benefits. This study aimed to determine the optimum growth of Spirulina cultivation using nutrient variables, which were cultured in three different containers, namely open pond batch, closed pond batch and open pond continue. Spirulina sp. was cultivated using NPK fertilizer and urea with freshwater media and light obtained from TL lamps 20 watts. The growth was observed every 24 hours for the analysis process using count booths to determine the number of Spirulina cells. Growth density rate of  Spirulina cells in the open pond container batch was 500 cells / ml, in the closed pond batch was 400 cells / ml and in the open pond continue was 290 cells / ml with the number of starter cells of 110 cells / ml.\u0000\u0000Abstrak\u0000Spirulina sp. merupakan jenis mikroalga yang sedang banyak dikembangkan akhir-akhir ini karena memiliki banyak fungsi dan manfaat. Penelitian ini bertujuan untuk mengetahui pertumbuhan optimum pada kultivasi Spirulina sp dengan menggunakan variabel nutrien yang dikultur dengan 3 wadah yang berbeda yakni open pond batch, closed pond batch dan open pond continue. Spirulina sp. dikultivasi menggunakan pupuk NPK dan urea menggunakan media air tawar serta cahaya didapatkan dari lampu TL 20 watt kemudian pertumbuhan diamati setiap 24 jam untuk proses analisa digunakan bilik hitung untuk mengetahui jumlah sel spirulina. Angka pertumbuhan kepadatan sel mikroalga Spirulina sp. pada wadah open pond batch 500 sel/ml, pada closed pond batch 400 sel/ml dan pada open pond continue 290 sel/ml dengan jumlah sel stater 110 sel/ml","PeriodicalId":107274,"journal":{"name":"Jurnal Kimia dan Rekayasa","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116734327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Temperature and Time of Reaction Of FeSO4 Synthesis and Characterization Of Fe2O3 Nanoparticles from Lathe Iron Waste","authors":"Kriscylla Sekar Arum, Dewi Astuti Herawati","doi":"10.31001/jkireka.v1i1.11","DOIUrl":"https://doi.org/10.31001/jkireka.v1i1.11","url":null,"abstract":"The lathe industry produces 3-5 kg / month of lathe iron waste which has a negative impact on environmental pollution. However, iron lathe waste also has potential as a raw material for making ferrous sulfate and for making ferrous oxide.The synthesis of ferrous sulfate is carried out by mixing the lathe iron waste with 25% sulfuric acid with a variation of temperature (50; 60; 70) oC and time (5; 10; 15) minutes.The process of ferrous oxide synthesis is carried out by mixing ferrous sulfate crystals that have been formed with NaOH and then characterized into nanoparticles by SEM analysis.The results showed that the study produced ferrous sulfate from qualitative tests.The best temperature and time in the ferro sulfate synthesis process is at 70oC and 15 minutes with a yield of 7.52%.The results of SEM analysis measurements of the average ferrous oxide of 3 samples obtained a size of 39.1 nm\u0000\u0000Abstrak\u0000Industri besi bubut menghasilkan limbah besi bubut sekitar 3-5 kg/bulan yang menimbulkan dampak negatif terhadap pencemaran lingkungan. Namun limbah besi bubut juga mempunyai potensi sebagai bahan baku pembuatan ferro sulfat dan pembuatan ferro oksida. Sintesis ferro sulfat dilakukan dengan mencampurkan limbah besi bubut dengan asam sulfat 25% dengan variasi suhu (50; 60; 70)cC dan waktu (5; 10; 15) menit. Proses sintesis ferro oksida dilakukan dengan mencampurkan kristal ferro sulfat yang telah terbentuk dengan NaOH dan kemudian di karakterisasikan menjadi nanopartikel dengan analisis SEM. Hasil penelitian menunjukkan bahwa penelitian menghasilkan ferro sulfat dari uji kualitatif. Suhu dan waktu terbaik pada proses sintesis ferro sulfat yaitu pada suhu 70oC dan waktu 15 menit dengan nilai rendemen 7,52%. Hasil pengukuran analisis SEM terhadap ferro oksida rerata dari 3 sampel  diperoleh  ukuran 39,1 nm.","PeriodicalId":107274,"journal":{"name":"Jurnal Kimia dan Rekayasa","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114211198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}