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Nur Hidayati
Fakultas Ilmu Kesehatan, Universitas Setia Budi Surakarta
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Penurunan Kadar Nitrit pada Daging Sapi Burger dan Kornet dengan Larutan Vitamin C secara Spektrofotometri Nur Hidayati; Mardiyono Mardiyono
Jurnal Farmasetis Vol 12 No 3 (2023): Jurnal Farmasetis: Agustus 2023
Publisher : LPPM Sekolah Tinggi Ilmu Kesehatan Kendal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32583/far.v12i3.1286

Abstract

Daging sapi olahan burger dan kornet, merupakan makanan cepat saji yang mengandung pengawet nitrit, efek penggunaan nitrit yang berlebihan adalah terbentuknya methemoglobinemia dan menyebabkan kanker. Vitamin C dapat mengoksidasi senyawa nitrit menjadi nitrit oksida. Penelitian ini bertujuan untuk mengetahui pengaruh perendaman dalam larutan vitamin C terhadap penurunan  konsentrasi nitrit dalam daging sapi burger dan kornet. Penelitian menggunakan sampel daging sapi burger dengan kode B dan kornet dengan kode C, selanjutnya masing-masing direndam ke dalam  larutan vitamin C dengan variasi konsentrasi (0,00; 0,30; 0,60; 0,90 dan 1,20) % selama 30 menit. Residu nitrit ditentukan kadarnya menggunakan metode Spektrofotometri.Kadar nitrit awal daging burger (B) sebesar 17,633 ppm mengalami penurunan setelah perendaman dalam larutan vitamin C dengan konsentrasi (0,30; 0,60; 0,90 dan 1,20) % berturut-turut sebesar (22,23; 50,39; 74,16 dan 74,27) %. Daging kornet (C) awal sebesar 14,563 ppm, mengalami penurunan kadar nitrit berturut-turut sebesar (31,83; 60,38; 87,39; 89,72) %. Peningkatan penggunaan konsentrasi larutan vitamin C untuk merendam daging burger dan kornet, maka kadar nitrit semakin menurun.
Utilization of Unripened Coconut Waste as An Organic Fertilizer and Its Quality Testing Argoto Mahayana; Sunardi; Sumardiyono; Nur Hidayati; Soebiyanto
Jurnal Serambi Engineering Vol. 9 No. 2 (2024): April 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The aim of this study was to create and evaluate the quality of organic fertilizer using Unripened coconut waste. The process involves chopping the waste into small pieces and placing it in a container or bucket. EM4 activator liquid is then sprayed onto the waste, followed by the addition of molasses. This process is repeated for the second and subsequent batches. The prepared Unripened coconut waste is covered withblack plastic to maintain anaerobic conditions and a temperature of no more than 60°C. The pile is turned multiple times to stabilize the temperature at ± 35-45°C. The first turning occurs after one week, followedby weekly turning for up to one month. The resulting fertilizer is dried through aeration, sieved, and tested for quality. The water content was determined using the distillation method, while total nitrogen wasmeasured using the Kjeldahl method. Phosphorus was quantified using a UV-Vis Spectrophotometer, and potassium was analysed using AAS. The results indicate that Unripened coconut waste can be utilised as an organic fertiliser. The fertiliser is brown in colour, soft in texture, has an earthy smell, and a temperature of 28°C. The organic fertiliser contains 22.8% water, 0.833% nitrogen, 0.118% phosphorus, and 5.616% potassium. The produced organic fertilizer meets the specifications for fertilizer from organic waste based on nitrogen, phosphorus, and potassium content according to SNI 19-7030-2004.
Analysis of COD and BOD5 at the Inlet and Outlet of the Wastewater Treatment Plant (WWTP) at Hospital X Sunardi; Fakhrizal Falah; Argoto Mahayana; Sumardiyono; Nur Hidayati; Soebiyanto; Mahardira Dewantara
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Hospitals are one of the service facilities that produce large amounts and quality of liquid waste that requires special attention because it contains hazardous materials for public health and the environment. This study aims to determine the quality of COD and BOD effluents in X Hospital. The type of research used is observational with a descriptive approach. The sampling technique used was purposive sampling, where wastewater samples were taken from two points, namely the inlet and the outlet of the WWTP. Based on the results of the laboratory analysis of the wastewater samples from Hospital X, it can be concluded that the average COD value at the inlet of the WWTP was 64.04 mg/L, while the average COD value at the outlet of the WWTP was 47.90 mg/L, and the average BOD value at the inlet was 12.69 mg/L, while the average BOD value at the outlet was 1.60 mg/L. All of these values are qualified according to the Hospital Activity Liquid Wastewater Quality Standards based on Central Java Province Regional Regulation No. 5 of 2012. It is expected that Hospital X will continue to maintain the wastewater treatment plant.
Environmentally Friendly Synthesis of Ferric Chloride Coagulant from Scrap Iron for the Reduction of ion ferro and Total Dissolved Solids Sumardiyono; Sunardi; Argoto Mahayana; Nur Hidayati; Soebiyanto; Mahardira Dewantoro; Afif Afghohani
Jurnal Serambi Engineering Vol. 11 No. 3 (2026): Juli 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The decline in groundwater quality, particularly in terms of TDS and Fe²⁺ levels, is a major concern in clean water supply. This study aims to synthesize and evaluate the effectiveness of FeCl₃ coagulant synthesized from scrap iron waste from a lathe workshop in reducing Total Dissolved Solids (TDS) and Fe²⁺ levels in borehole water. FeCl₃ was synthesized by reacting scrap iron waste with a 32% HCl solution. Water samples were tested for TDS and Fe²⁺ levels before and after treatment using gravimetric and UV-Vis spectrophotometric methods. The FeCl₃ coagulant doses used were 0.1%, 0.2%, and 0.3%. The results showed that the 0.3% dose provided the highest effectiveness in reducing Fe²⁺ levels by 80.10%, while the reduction in TDS reached 36.05% at the same dose. All doses successfully reduced Fe²⁺ levels to below the threshold set by Ministry of Health Regulation No. 2 of 2023 (<0.2 mg/l). This study demonstrates that FeCl₃ coagulant derived from iron waste is effective and has the potential to serve as an economical and environmentally friendly alternative for water treatment.
Co-Authors Afif Afghohani Argoto Mahayana Argoto Mahayana Arief Riyanto Arum Nur Fitrah Birgita Panca Indriarini Daryati Dewi Sulistyawati Dian Kresnadipayana Dwi Setyaningsih Fakhrizal Falah Gloriana Acacia Correia Belo Ika Lailla Rahmawati Leni Marbetha Mahardira Dewantara Mahardira Dewantoro Mardiyono Mardiyono Mardiyono Mardiyono Mardiyono Meika Syahbana Rusli Nony Puspawati Nony Puspawati Nony Puspawati Nony Puspawaty Soebiyanto Soebiyanto Soebiyanto Soebiyanto Soebiyanto Soebiyanto Soebiyanto Soebiyanto Soebiyanto Sri Widati Sumardiyono Sumardiyono Sunardi Sunardi Sunardi Umi Safiatun Wimpy, W