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PROSES ADSORPSI SENYAWA LINIER ALKILBENZENE SULFONAT (LAS) MELALUI ARANG AKTIF KULIT UBI KAYU

BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Vol 1, No 2 (2015): Februari
Publisher : Program Studi Biologi, Fakultas Biologi Universitas Medan Area

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Abstract

This research aims was to analyze the potential of activated charcoal leather cassava in the adsorption process linear compounds alkilbenzene sulfonate (LAS) contained in the liquid waste household detergents. Stages of the study consisted of charcoal formation process of the skin of cassava through the combustion process of pyrolysis, charcoal leather activation process cassava, and the compound adsorption process linear alkyl sulfonate (LAS) contained in the liquid waste household detergents. The results showed that activated charcoal is formed from leather waste cassava LAS have the ability to adsorb the compounds contained in domestic wastewater. Treatment optimum adsorption occurs at a concentration of activated charcoal leather cassava 4 grams and a contact time of 20 minutes.

PENGARUH KADAR ASAM SULFAT PADA HIDROLISIS TANDAN KOSONG KELAPA SAWIT (TKS) DAN WAKTU FERMENTASI TERHADAP KADAR BIOETANOL YANG DIHASILKAN

BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Vol 4, No 2 (2018): Februari
Publisher : Program Studi Biologi, Fakultas Biologi Universitas Medan Area

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Abstract

The effect of sulphuric acid fermentation of processed palm oil bunch hydrolysis and on ethanol and sugar production was conducted. The aim was to investigate the hydrolytic optimum required by Saccharomyces cerevisiae for ethanol and sugar production. About 12.5 g powdered palm oil bunch was used in this experiment. The powder was hydrolized several times using sulphuric acid in several concentration. Sugar, product of  hydrolysis, was detected every one hour using spectrophotometer. The sugar was fermented by Saccharomyces cerevisiae and incubated for several days. Results showed that 2-4% sulphuric acid was oprimum concentration for 30 g/L sugar production. The highest ethanol production 4.94% occurred after two days fermentation.

Skrining Fitokimia dan Antimikroba Ekstrak Daun Kirinyuh terhadap Bakteri Staphylococcus Aureus Dan Escherichia Coli

BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Vol 2, No 2 (2016): Februari
Publisher : Program Studi Biologi, Fakultas Biologi Universitas Medan Area

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Abstract

This reseach aims to determine the composition of secondary metabolites of kirinyuh leaf extract (Euphatorium ordoratum.L) and antimicrobial properties of the extract against Staphylococcus aureus and Escherichia coli. The study was conducted in three phases: the first phase is manufacture kirinyuh leaf extract (Euphatprium odoratum L) through maceration method using N-Hexane solvent and methanol. In stage II, phytochemical screening, namely the identification of secondary metabolites (alkaloids, flavonoids, terpenoids and steroids) to the crude extract of  leaves kirinyuh (Ephatorium odoratum L) in the form of antimicrobial properties of extracts against Staphylococcus aureus and with variations extract concentrations of 0%, 1 %, 5%, 10%, 15%, 20%, and 25% Echerichia coli and incubated at 37°C for 24 hours. The research found that such compounds secondary metbolit alkaloids, flavonoids, steronoid, and saponin, which dominates the secondary metabolites of four that alkaloid. While the screening test of phytochemical N-hexane extracts is not contain metbolit secondary compounds, testing against bacteria possess bioktivitas inhibition at concentrations of 15% with inhibition zone of 1.3 cm on Escherichia coli bacteria and 1.0 cm in bacteria Staphylococcus aureas. This shows kirinyuh leaf extracts have the ability as an anti-microbial.