BACKGROUND: Waste cooking oil (WCO) is overused for frying food can be a series of chemical changes, such as rancid, oxidation, and decomposition. Most of the secretion of toxic compounds are a product of oxidizing fatty acids, especially double-unsaturated fatty acids. The intervention of stirrer chamber unit and utilization of chicken egg’s shell as an absorbent is known to be able to improve the quality of WCO, includes reducing the number of peroxide and the free fatty acids (FFA). AIM: The purpose of this study was to analyze the effect of the powdered chicken egg’s shell on the number of peroxide and the WCO’s FFA through the stirrer chamber. METHODS: The research design used a simple experiment type post-test only Control Group Design. The subject was divided randomly into two groups, the treatment was given to one group as a control group and another group (other treatment) as an experimental group. The WCO sample called “Jelantah” for each treatment was 100 ml as much as 48 samples. The replication was carried out twice with 24 treatments of the mass of egg’s shell powder that was 0 g, 5 g, 10 g, and 15 g at a stirring time for 15 min, 30 min, and 45 min before and after heating 35°C using 150 rpm of stirring speed. The sampling technique used purposive sampling and the data were analyzed by Anova statistical test. RESULTS: Based on the result from this research showed that the original WCO contained the number of peroxide and FFA exceeded the quality standard of SNI 3741 (2013) that is 16.7 MekO2/kg and 0.69% in sequence. The average number of peroxide of control group before heating was 15.31 MekO2/kg and after heating was 17.4 MekO2/kg, while the FFA before heating was 0.61%, and after heating was 0.71%. The number of peroxide of the treatment group before heating was 12.83 MekO2/kg and after heating was 6.98 MekO2/kg, while the FFA content before heating was 0.46% and after heating was 0.25%. CONCLUSION: It was concluded that chicken egg’s shell powder could minimize the content of peroxide and WCO’s FFA through the stirrer chamber.
Corn cobs are a solid waste that has not been maximally utilized and can pollute the environment. Corn cobs can be used as activated charcoal because they contain cellulose (41%) and hemicellulose (36%). The research objective was to determine the ability of corncob activated charcoal to reduce water iron (Fe) content in water. True Experiment research with pretest-posttest design with control group design with 6 repetitions. The mass variation of corn cobs activated charcoal in the filter media used was 2,920 gr, 4,380 gr, and 5,840 gr. The number of samples of the artificial iron solution used for each repetition of each of the variations in the mass of the adsorbent was 7 litres so that the total required was 168 litres. The data obtained were analyzed using One Way Anova. The results showed the levels of Fe after treatment in the mass variation of activated charcoal cob 2920 gr was 2.55 mg/L, at 4,380 gr mass was 1.67 mg/L, and in the mass 5.840 gr was 0.64 mg/L. The highest reduction efficiency in iron content was in the mass of 5,840 gr which was able to reduce Fe levels up to 85.70%. This study proves that activated corn cobs can be used as an absorbent to reduce levels of iron (Fe) in water.
The batik traditional industries in East Java, Indonesia generally not have a proper wastewater treatment plant yet, so liquid waste directly discharge into the river. Batik wastewater generally have a dark color, which derived from the coloring of naphthol with number of suspended solids greater than 100 mg/L and color concentration more than 250 Pt.Co. Tamarind seed extract is known to contain natural polyelectrolytes active group, which had function as bio-coagulant. The research objective was to analyze the application of tamarind seed extract as bio-coagulant in wastewater treatment of the Batik traditional industries, by reducing suspended solids levels and color of wastewater. The research design used pretest and posttest control group design with variations of bio-coagulant doses of 10ml/L, 30ml/L, and 50ml/L, and analyzed using the Two Way Anova Test. The results showed that the level of suspended solids in wastewater before treatment averaged 291mg/L, and the average color content was 593 Pt-Co, so it did not meet the quality standards of the Governor of East Java No 72/2013. For the highest reduction in suspended solids levels at a dose of 10ml/L reduced up to 95.1% and the highest decrease in color levels at a dose of 50ml/L, reduced up to 87.8%. Traditional batik wastewater treatment, which used a coagulation-flocculation process with bio-coagulant extract of tamarind seeds could reduce levels of suspended solids and colors, in order to meet the specified quality standards.
Research has been conducted on bioadsorbent of kepok banana peel in the form of activated carbon in reducing lead levels in Pb solution. This study aims to analyze the ability of bioadsorbent kepok banana peel in reducing lead levels in Pb solution. This research was started by making bioadsorbent of Kepok banana peel in the form of 100 mesh activated carbon and activated 2.5M H2SO4. Measurement of lead levels before and after the addition of bioadsorbent of kepok banana peel using spectrophotometric methods using AAS type UV-1800 and then analyzed using One Way ANOVA test. The results showed that the average lead level before treatment was 4.96 mg / L and after being treated with additional bioadsorbent of kepok banana peel with a variation of 1 gram, 2 gram and 3 gram in sequence of 3.76 mg / L, 0.93 mg / L and 0.22 mg / L. The biggest decrease occurred in the addition of a dose of 3 grams, namely 95.6% and the lowest in the addition of a dose of 1 gram, 24.1%. One Way ANOVA test shows the results of p <0.05 so that there are significant differences. Keywords: lead (Pb), bioadorbent, kepok banana skin ABSTRAK Telah dilakukan penelitian tentang bioadsorben kulit pisang kepok berbentuk karbon aktif dalam menurunkan kadar timbal pada larutan Pb. Penelitian ini bertujuan untuk menganalisis kemampuan bioadsorben kulit pisang kepok dalam menurunkan kadar timbal pada larutan Pb. Penelitian ini diawali dengan pembuatan bioadsorben kulit pisang kepok dalam bentuk karbon aktif dengan ukuran 100 mesh dan diaktivasi H2SO4 2,5M. Pengukuran kadar timbal sebelum dan sesudah penambahan bioadsorben kulit pisang kepok menggunakan metode spektrofotometri menggunakan AAS tipe UV-1800 dan selanjutnya dianalisis menggunakan uji One Way ANOVA. Hasil penelitian menunjukkan rata-rata kadar timbal sebelum diberi perlakuan sebesar 4,96 mg/L dan sesudah diberi perlakuan penambahan bioadsorben kulit pisang kepok dengan variasi dosis 1 gram, 2 gram dan 3 gram secara berurutan sebesar 3,76 mg/L, 0,93 mg/L dan 0,22 mg/L. Penurunan terbesar terjadi pada penambahan dosis 3 gr yaitu 95,6% dan terendah pada penambahan dosis 1 gram yaitu 24,1%. Uji One Way ANOVA menunjukkan hasil p < 0,05 sehingga terdapat perbedaan yang signifikan. Kata kunci: timbal (Pb), bioadsorben, kulit pisang kepok
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.