Article Per Year (5 Year)
p-Index From 2020 - 2025
0.23
P-Index
This Author published in this journals
All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Wahyu Ratnaningsih
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Arts Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Social Sciences

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
OPTIMALISASI PENGELOLAAN USAHA LABORATORIUM LAPANG TERPADU FAKULTAS PERTANIAN UNIVERSITAS LAMPUNG MENGGUNAKAN METODE LINEAR PROGRAMMING Wahyu Ratnaningsih; Sandi Asmara; Winda Rahmawati; Agus Haryanto; Dwi Dian Novita
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 1 (2018): April
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.288 KB) | DOI: 10.23960/jtep-l.v7i1.25-34

Abstract

ABSTRAKLaboratorium lapang terpadu (Lab. LT.) merupakan salah satu laboratorium yang terdapat di Fakultas Pertanian Universitas Lampung.  Memiliki luas 67.000 m², yang terbagi menjadi 5 bagian utama yaitu lahan usaha, lahan penelitian dan praktikum, lahan ternak, kolam ikan, dan lahan tidak terpakai.  Penelitian ini menggunakan model linear programming berdasarkan metode simpleks dengan bantuan software QM For Windows.  Tujuan dari penelitian ini yaitu merumuskan formulasi matematika model linear programming dan menghitung nilai keuntungan optimal bagi pengelolaan Lab. LT.  Hasil penelitian menunjukan bahwa nilai keuntungan data asumsi lebih besar dari data asli berdasarkan kondisi Lab. LT.  Keuntungan yang diperoleh setiap tiga bulannya jika nilai Zmax (x2) sama dengan nol yaitu Rp.22.200.370, dengan ketentuan luas lahan usaha ditambah 0,52% dari luas sebelumnya dan untuk kolam ikan ditambah 2,22% dari luas sebelumnya.  Sedangkan berdasarkan nilai asumsi keuntungan yang akan diperoleh setiap tiga bulannya yaitu Rp.34.810.000, dengan ketentuan luas lahan penelitian dan praktikum ditambah 1% dari luas lahan sebelumnya dan untuk kolam ikan ditambah 2,33% dari luas kolam yang digunakan sebelumnya.  Selisih keuntungan yang diperoleh dari data asli dan data asumsi yaitu sebesar Rp. 14.821.850 setiap 3 bulannya.__________________________________________________________________Kata kunci: Optimalisasi, riset operasional, linear programming, metode simpleks, QM for windows.
DISPERSING AGENTS WASTEWATER QUALITY FROM LATEX GLOVES MANUFACTURING BY TREATMENT USING Al2(SO4)3 AND PAC COAGULANT Wahyu Ratnaningsih; Cahya Widiyati
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol 22 No 2 (2023): Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Publisher : Politeknik ATK Yogyakarta

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

Abstract

Waste is a residual result of a process that cannot be reused. The rubber industry is one of the waste-producing industries that if not managed properly, will cause environmental pollution. One of the rubber industries is the latex glove industry, which uses raw materials in the form of latex and chemicals as dispersing agents. Dispersing agents that already expired cannot be reused, so they need to be processed before being discharged into the environment. One of the methods used for treating this wastewater is the coagulation-flocculation method. This research is aimed to conduct the treatment of dispersing agents wastewater from latex glove manufacturing by the coagulation-flocculation method using coagulants to reduce the level of turbidity and COD concentration. The concentrations of Al2(SO4)3 and PAC coagulants used were 1.33 g/L, 1.67 g/L, and 2 g/L, respectively, with rapid stirring at 120 rpm for 2 minutes. The flocculant concentration used was 0.33 g/L, with rapid stirring at 25 rpm for 15 minutes. The results showed that Al2(SO4)3 coagulant was better at reducing turbidity levels up to 97.86% and COD concentrations up to 90.24% in the dispersing agents wastewater. Based on this study, the recommended dose of Al2(SO4)3 coagulant is 1.67 g/L. At this dose, there was a decrease in turbidity levels from 816 NTU to 17.43 NTU and a decrease in COD levels from 328 mg/L to 32 mg/L.
Co-Authors Agus Haryanto Cahya Widiyati Dwi Dian Novita Sandi Asmara Winda Rahmawati