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Ài Silmi
FT-Universitas Satya Negara Indonesia
Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Education Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Public Health Social Sciences

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PENGUJIAN TOKSISITAS AKUT LOGAM TIMBAL (Pb), KROM (Cr) DAN KOBALT (Co) TERHADAP Daphnia magna AI Silmi
JURNAL TECHLINK Vol. 2 No. 2 (2018)
Publisher : FT-USNI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59134/jtnk.v2i2.492

Abstract

This study aimed to analyze the LC50 value of metallic lead (Pb), chromium (Cr), and cobalt (Co)contained in the printing industry wastewater to Daphnia magna and analyze the relationship of these metals to the LC50 value. The measurement results konsnetrasi Pb and Cr do not exceed the quality standards established, but the metals Co exceeds quality standards. Toxicity of Pb, Cr, and Co were tested in static test using artificial solution of Pb, Cr, and Co in accordance with the concentration measured in the wastewater. Tests carried out consisted of two stages: a preliminary test and test base. Daphnia magna mortality data were analyzed using Probit method with the EPA program Probit Analysis Program Version 1.5. 24-hour LC50 value of Pb, Cr, and Co to Daphnia magna is 1.052% and the LC50 values of Pb, Cr, and Co are respectively 0.003 mg / l, 0.008 mg / l and 0.009 mg / l. All three metals have included the category of very toxic to Dahnia magna.
PENGOLAHAN LIMBAH MINYAK DAN LEMAK DI RESTORAN PADANG DENGAN METODE FISIK (OIL GREASE TRAP) Ilham Akbar; Ai Silmi
JURNAL TECHLINK Vol. 5 No. 2 (2021)
Publisher : FT-USNI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59134/jtnk.v5i2.518

Abstract

One way to process oil and fat wastes is by the physical method of oil grease trap. In principle the oil grease trap method can separate oils and fats using slow speeds. The slow pace would allow time for oil and fat to separate from the water by gravitational force of the oil and fats that had been separated would be contained in container of disposal. The aim of the study is to know the effectiveness of domestic wastewater treatment and how to analyze by means of gravimetric method (SNI 06-6989 10-2011) and to achieve an alternative method of oil and fatty waste treatment. The method used in laboratory studies for testing levels of oil and fats,vcod and TSS that would be compared to p.68/ menlhk/setjen/1/8/2016 on the domestic waste water quality obtained on this study is that oil and fat achieve levels before and after processing as much 18.5 mg/l and 10.1 mg/l with a 45.40% drop. On BOD came levels before and after Processing of 143.88 mg/l and 109.2 mg/l with a 24.10% drop. On COD came levels before and after Processing of 342,32 mg/l and 280,7 mg/l with a 18% drop. On TSS came levels before and after Processing of 188,6 mg/l and 136,32 mg/l with a 27,72% drop. Such results are not yet met by quality standards, so chemical processing of coagulating with poly aluminum chloride and rapid evaporation and flotation with flotation addition is required So that oil and fat, BOD, COD can be reduced.
UJI KINERJA INSTALASI PENGOLAHAN AIR LIMBAH (IPAL) RUMAH SAKIT DI KAYU PUTIH RAYA JAKARTA TIMUR Gusvadillah Syarifudin; Ai Silmi; Mohamad Abdul Aziz
JURNAL TECHLINK Vol. 6 No. 1 (2022)
Publisher : FT-USNI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59134/jtnk.v6i1.530

Abstract

The hospital in the Pulomas area has built 2 units of Waste Water Treatment Plant facilities with Anaerobic-Aerobic Biofilter and Extended Aeration systems. The performance of Waste Water Treatment Plants (IPAL) requires comprehensive maintenance and evaluation of Waste Water Treatment Plants (IPAL) so that the waste water treatment system works optimally and reaches the quality standards set by the Government. The results of measurements carried out in Oct-Nov 2021 at the old WWTP show that the pH complies with the quality standards of Minister of Environment and Forestry Regulation P.68 of 2016, namely between 6-9. Meanwhile, the discharge measurement results have exceeded the permitted limit in accordance with the Waste Water Disposal Permit set by DPMPTSP DKI Jakarta, namely 29 m3/day, but the IPAL capacity is still capable of processing the average discharge generated. At the new IPAL with the same testing time, the results of measurements carried out in October-November 2021 showed that the pH was in accordance with the quality standards of Minister of Environment and Forestry Regulation P.68 of 2016, namely between 6-9. Meanwhile, the discharge measurement results are still below the permitted limit in accordance with the Waste Water Disposal Permit set by DPMPTSP DKI Jakarta, namely 20 m3/day. In the Old IPAL the COD parameter exceeds the permitted limit in accordance with the Waste Water Disposal Permit set by the DPMPTSP DKI Jakarta, namely 2.90 kg/day, whereas in the new IPAL the evaluation results can be seen that there is no processing in the pramary treatment, namely a grease trap with processing efficiency. of 0%. From the results of the evaluation that has been carried out, it can be concluded that the average processing efficiency of the Old IPAL is 51.28%. When compared with the standard criteria for a WWTP with an Anaerobic-Aerobic Biofilter system with a processing efficiency level of 90-95%, the performance of the Old WWTP is less than optimal. Meanwhile, the average processing efficiency of the New IPAL is 46.74%. When compared with the standard criteria for a WWTP with an Extended Aeration system, the processing efficiency level is 85-87%, then the performance of the New WWTP is also less than optimal.
Co-Authors Bosar Panjaitan Deni Kurniawan Gusvadillah Syarifudin Ilham Akbar Mohamad Abdul Aziz