Indonesia Conference Directory

Corresponding Author
Nurandani Hardyanti

Institutions
Department of Environmental Engineering, Faculty of Engineering, Diponegoro University, Semarang – Indonesia

Abstract
One of the dominant compound in a personal care product is sodium lauryl sulfate (SLS). This research was to study the effect of efficiency SLS on the removal of ammonium (NH4+) and COD on anaerobic batch reactors. In this reactors, septic tank sediments were contacted with artificial wastewater with an ammonium concentration of 30 mg NH4+-N /L and 300 mg/L COD concentration. Reactors were operated for 15 days with variations of SLS concentration 0.5, 10, 50, 100 mg/L. The best COD removal efficiency and the rate is in the 5 mg SLS/ L with the efficiency value of 99,6% and a reduced rate of 19,67 mg/L. The efficiency and rate of COD removal continued to decrease with increasing SLS concentrations. Meanwhile, the best ammonium (NH4+-N) removal efficiency and the rate was in the 0 mg SLS/ L with the efficiency value of 73.32% and a reduced price of 1.30 mg/L. The magnitude of the efficiency and removal rate of ammonium also decreases with increasing SLS concentration. Temperature and pH values for all reactors were in the range 26-28°C. The pH values in the five reactors were relatively the same both without and with the addition of SLS concentrations.

Keywords
personal care, sodium lauryl sulfate, SLS, anaerobic batch reactor, ammonium, COD

Topic
Environmental Technology

Link: https://ifory.id/abstract/ECxNup7brwcf

Corresponding Author
John Bosco Niyomukiza

Institutions
a) Masters student, Diponegoro University, Faculty of Engineering, Department of Civil Engineering
*niyojayb1992[at]gmail.com
b) Lecturer, Diponegoro University, Faculty of Engineering, Department of Civil engineering

Abstract
Expansive soils have proved to be problematic to most Civil Engineering structures. Several researchers have tried to look for different materials which can alter the properties of these poor soils, and among them are lime and cement, which are expensive. Considering the vast quantities of sawdust produced in woodwork departments, they can be used as a secondary stabiliser, thus leading to sustainable technologies. Sawdust not only acts as a cheap stabiliser but also reduces the problem of environmental pollution caused by its poor disposal. This paper examines the geotechnical properties of expansive soil stabilised by Keruing sawdust. The sawdust was used as partial replacement of soil in the ratio of 0, 3, 5, and 7% by the dry soil weight. The investigation was done by conducting laboratory tests on both stabilised and non-stabilized soils. The results showed that Keruing sawdust significantly improved the geotechnical properties of the soil by reducing the plasticity index from 64% to 36% at 0% and 7% sawdust, respectively. The unconfined compressive strength and California Bearing Ratio also improved at 3% sawdust + 97% soil. It was concluded that Keruing sawdust, a waste material could be used as a cheap additive to the expansive soils.

Keywords
CBR; Expansive clay soil; Keruing sawdust; Stabilization; UCS

Topic
Environmental Technology

Link: https://ifory.id/abstract/fKHycAbEnBNQ

Corresponding Author
Wiharyanto Oktiawan

Institutions
(1,2)Departement Environmental Engineering, Faculty of Engineering, Diponegoro University, (3) Student in Master of Environmental Engineering, Institut Teknologi Sepuluh Nopember

Abstract
Leachate are dominantly recalcitrant organic pollutants, and thus before its discharge to the environment, leachate must be treated. In this study, electrochemical processes, using aluminum and iron electrode in electrocoagulation, were used to remove non-biodegradable compounds in leachate. The electrocoagulation was conducted as main treatment at flow rate 20 ml/minutes and 40 ml/minutes and constant volatage of 5 volt, and 10 volt. The results showed that aluminum electrocoagulation was effective to remove organic pollutant (measured as COD) 54,08% (2,5 g) using 10 volt and flow rate 20 ml/minutes, respectively, while maintaining its initial pH condition at 5,7-6,6. applied voltage 20 ml/minutes using iron electrode provides results 33,7% (1,9 g) removal of COD, by using Fe electrode provides increasing pH 6,0 to 9,1. This implies that higher voltage and minimum flow rate at aluminum and iron electrode was likely to affect higher COD removal than minimum voltage and higher flow rate. Overall, electrocoagulation processes can be used as alternative method for the removal of recalcitrant organic pollutants of leachate in Jatibarang landfill Semarang City.

Keywords
electrochemical; electrocoagulation; electrode; flowrate; leachate; recalcitrant

Topic
Environmental Technology

Link: https://ifory.id/abstract/ZVzU468Wk7Re

Corresponding Author
Siti Umi Kalsum

Institutions
Department of Environmental Engineering University of Batanghari Jambi, Indonesia

Abstract
Tanjung Jabung Timur Regency is a coastal area with peat water as clean water to meet daily needs. Peat water is not treated in advance by residents. This area is also a producer of marine resources in the form of shrimp which is a commodity in coastal regions. Shrimp are only used for meat, while shrimp shells, tails, heads become waste. Shrimp shell waste (chitosan) contains protein (25% - 40%), calcium carbonate (45% - 50%), and chitin (15% - 20%), but the magnitude of the component content depends on the type of shrimp. The purpose of this study is to utilize shrimp shells into alternative coagulants and determine the optimum dose of chitosan in reducing parameters in peat water. Shrimp shell waste (chitosan) into powder, then chitosan powder is used to treat peat water and determine the optimum dose of shrimp shell powder in reducing peat water parameters. The parameters tested were pH, color, iron, organic matter. The efficiency of shrimp shell waste powder in reducing peat water parameters. Variation of shrimp shell waste dosage (chitosan) at a dose of 100 mg / l, 200 mg / l, 400 mg / l and 500 mg / l. The results showed that the optimum dose of shrimp shells (chitosan) at a dose of 400 mg / l acidity degree (pH) efficiency could increase up to 75.00%, at a dose of 100 mg / l, the color parameter was able to reduce 49.52%, the iron parameter (Fe) able to reduce 90.20%, and settings of organic matter (KMnO4) reduce 73.49%.

Keywords
shrimp shell waste, Tanjung Jabung Timur District, alternative coagulant, peat water

Topic
Environmental Technology

Link: https://ifory.id/abstract/TexatRKgJZ8y

Corresponding Author
Dayoe Imaniar Gita

Institutions
a) Wageningen University and Research, 6700 HB Wageningen, The Netherlands
b) Department of Environmental Engineering, Diponegoro University, Semarang-Indonesia

Abstract
About 15% of the total population of Semarang City does not get any waste management service. The lack of the infrastructure for collecting and processing waste, transportation, and disposal of the waste in the unserved area are believed to be the causes of the problem. As a result, incineration becomes the solution chosen for some people. Unfortunately, incineration has negative effects. The ash produced by the incineration contains pollutants. To reduce the ash, the pollutant control devices that can be applied to the incinerator are needed. It is also necessary to monitor air quality emissions to find out the ash opacity value of a burning material. The modification into two variations was carried out to determine the performance of the incinerator. The first system variation uses the principle of spreading water on the ash produced by the incineration. While the second system variation uses the principle of passing the ash in the submerged water. The composition of the waste burned in the incinerator was 38.115% leaves, 3.458% branches, and 20.475% food scraps. The measurement of the opacity value is done at the inlet and outlet of the incinerator.

Keywords
Incinerator; First system variation; Second system variation; Opacity value

Topic
Environmental Technology

Link: https://ifory.id/abstract/7Hf6rjYzdXCp