The Analysis of Total Dissolved Iron from Mud Sedimentation Ponds Wastewater in PT Bukit Asam (Persero) Tbk Tanjung Enim Using Individual Control Diagram

The tests have been carried out on the iron content of wastewater in the inlet and outlet of the mud sedimentation ponds PT Bukit Asam (Persero) Tbk Tanjung Enim, South Sumatra Province. The iron concentration in mining waste water that does not comply with government standards of 7.0000 mg / L can pollute the environment. The measurement of iron concentration was carried out by Atomic Absorption Spectrophotometer (AAS) method in accordance with SNI 06-6989.4: 2004. Analysis of iron concentration using calibration curve methods and individual control diagrams. The results of data analysis showed that the iron content of the inlet and outlet MSP (Mud Sedimentation Ponds) wastewater was still under the standard set with an average value of 1.4488 mg/L inlet and outlet 0.4061 mg/L. Based on the results of the study the concentration of iron meets the established quality standards

The Analysis of Manganese (Mn) in Waste Water Treatment (IPAL) of Coal Mine of PT Bukit Asam Indonesia

Wastewater from the coal mining process containing heavy metal manganese is bad for water body and health of living things around it.  The South Sumatra Governor Regulation states that the content of iron (Fe) and manganese (Mn) must contain a maximum total of 7 mg/L and 4 mg/L before being released into the environment. This study aimed to verify the total dissolved Mn analysis method. Thirty-four (34) samples from the wastewater treatment plant pond were digested and measured by the Atomic Absorption Spectrophotometer (AAS) at a wavelength of 279.5 nm.  The analyzes performed were the precision, sensitivity, linearity, LOD detection limits and LOQ quantization limits. The measurement results showed the parameter value for a precision of 1.562%; linearity (coefficient of determination) standard curve 0.9939; sensitivity 0.0375; LOD 0.4287 g/mL; and LOQ 1.4291  g/mL. In conclusion, the measurement data for the total dissolved manganese met the quality standards for wastewater stated in the Regulation of the Governor of South Sumatra No.8 of 2012 by applying the predetermined method

Pemanfaatan Limbah Cair Industri Tahu sebagai Pupuk Cair Organik terhadap Pertumbuhan dan Produksi Tanaman Kangkung Darat (Ipomoea Reptans Poir)

Penelitian tentang Pemanfaatan Limbah Cair Industri Tahu Sebagai Pupuk Cair Organik Terhadap Pertumbuhan Dan Produksi Tanaman Kangkung Darat (Ipomoea reptans Poir) ini telah dilaksanakan pada Ja-nuari - Maret 2013. Tujuan penelitian ini untuk mengetahui pemanfaatan limbah cair industri tahu agar dapat digunakan sebagai pupuk cair organik untuk tanaman kangkung darat. Penelitian ini dilakukan dengan meng-gunakan Rancang Acak Kelompok (RAK), dengan perlakuan konsentrasi pupuk cair organik dari limbah tahu sebesar 0%, 2,5%, 5%, 7,5%, 10%, 12,5% dan 15%. Dan masing-masing perlakukan diulang sebanyak 3 kali. Ha-sil penelitian menunjukan bahwa pupuk cair organik tersebut dapat meningkatkan pertumbuhan dan produksi tanaman kangkung darat. Pengaruh yang signifikan dan nyata terlihat dari perlakuan pemberian konsentrasi pupuk cair sebesar 7,5%, 10%, 12,5% dan 15% yang berpengaruh terhadap berat basah tanaman kangkung da-rat yaitu 10,89 gr, 16,32 gr, 23,47 gr dan 37,61 gr. Sedangkan perlakuan terhadap berat kering tanaman kang-kung darat yaitu 2,59 gr, 3,28 gr, 4,11 gr, 5,31 gr dan 9,60 gr. Dari analisis sidik ragam pada taraf Uji 5%, di-dapat nilai F hitung (349,677) lebih tinggi dari nilai F tabel (2,209) pada berat basah tanaman kangkung darat. Sebaliknya untuk berat kering didapat nilai F hitung (412,665) lebih tinggi dari nilai F tabel (2,209). Sehingga dari analisis tersebut terdapat pengaruh yang signifikan dan nyata antara pemberian konsentrasi pupuk cair limbah tahu terhadap produksi tanaman kangkung darat (H1 diterima dan H0 ditolak)

Kinetics Approach of Biodegradation of Petroleum Contaminated Soil by using Indigenous Isolated Bacteria

The bioremediation of petroleum contaminated soil was investigated using a microscale Landfarming. The Indigenousbacteria, Pseudomonas pseudoalcaligenes, Bacillus megaterium, and Xanthobacter autotrophicus were isolated from the contaminated sites Sungai Lilin Jambi Pertamina Ltd and used further in the bioremediation experiments. The biodegradation rates of petroleum contaminated soil in the presence of the isolated bacteria were studied by using the chemical kinetics approach. The reaction orders were studied by using the differential method and the reaction rate constants were studied by using the integral method. The results showed that the reaction orders were 1.0949, 1.3985, 0.8823, and the reaction rate constants were 0.0189, 0.0204, 0.0324 day-1, respectively. Considering the values of reaction orders and reaction rate constants, the biodegradation rate of contaminated soil by usingeach bacteria had significantly different value; Xanthobacter Autotrophicus bacteria could degrade the petroleumoil sludge fastest than the others.Keywords: Biodegradation, indigenous bacteria, kinetics, petroleum oi

Kinetics Approach of Biodegradation of Petroleum Contaminated Soil by using Indigenous Isolated Bacteria

The bioremediation of petroleum contaminated soil was investigated using a microscale Landfarming. The Indigenous bacteria, Pseudomonas pseudoalcaligenes, Bacillus megaterium, and Xanthobacter autotrophicus were isolated from the contaminated sites Sungai Lilin Jambi Pertamina Ltd and used further in the bioremediation experiments. The biodegradation rates of petroleum contaminated soil in the presence of the isolated bacteria were studied by using the chemical kinetics approach. The reaction orders were studied by using the differential method and the reaction rate constants were studied by using the integral method. The results showed that the reaction orders were 1.0949, 1.3985, 0.8823, and the reaction rate constants were 0.0189, 0.0204, 0.0324 day-1, respectively. Considering the values of reaction orders and reaction rate constants, the biodegradation rate of contaminated soil by using each bacteria had significantly different value; Xanthobacter Autotrophicus bacteria could degrade the petroleum oil sludge fastest than the others

Correlation of Growth Parameters with Yield of Two Cassava Varieties

The correlation of major growth parameters with the yield of cassava in different growth phases was investigated in 2013 and 2014. This experiment was conducted to assess the effect of two cassava varieties and the different growth phases to the yield and yield components. In experiment, the varieties as treatment were arranged in a randomized complete block design (RCBD) with three replications. Two varieties consisted of superior Adira-4 and local varieties Singgah were used. The growth parameters (plant height, stem diameter, leaf number) and yield components (number of tuber, weight per tuber and tuber yield) in early growth phase, maximum vegetative growth phase and charging tuber phase, were observed. Based on the correlation results, the growth parameters and the yield highly affected to the final outcome of cassava tubers at different growth phases. In the early growth phase, occurs high demand to assimilate with the expense of storage root. However, from the maximum vegetative phase, growth parameters began to show a significant positive contribution to the tuber weight. Weight of fresh tuber in both varieties increased at the charging of tubers phase and thereafter (enlarged bulb). The early growth phase and maximum vegetative phase might not generate a significant contribution to the final yield of cassava tuber. Making those two periods were not suitable time for optimum harvesting result, and it still depended on the variety and its allocation

Eksplorasi Bakteri Hidrokarbonoklastik dari Rhizosfer di Lahan Tambang Minyak Rakyat, Kecamatan Babat Toman, Sumatera Selatan

This study aims to obtain rhizosphere bacteria as a potential agent of bioremediation. The method of sampling the plant rhizosphere by purposive sampling. Soil samples were taken from around the rhizos-phere of plants that live in soil contaminated oil. Bacteria were isolated from the rhizosphere soil samples, then they were selected into steps : performed purification, selection I and selection II. The among bacteria are tested the synergism, then characterized and identified it's genus. The results showed that there were as many as 34 rhizosphere bacterial isolates were collected from three different sampling locations. Identification of bacteria that have potential as a bioremediation agent. Each bacterial isolate was identified as Sporosarcina sp. A.4.10, Proteus sp. C.6.7, Actinobacillus sp. A.6.3, and Flavobacterium sp. A.5.8

The Growth Performance of Oil Palm Seedlings in Pre-Nursery and Main Nursery Stages as a Response to the Substitution of NPK Compound Fertilizer and Organic Fertilizer

The need of nitrogen (N), phosphate (P) and potassium (K) nutrient in oil palm nursery are usually fulfilled with synthetic chemical fertilizers such as NPK fertilizer. The application of NPK fertilizer can cause the soil to become hard due to the accumulation of the residue left on the ground. Cow manure is able to substitute NPK fertilizer based on the chemical status of the soil. This study aimed at analyzing the effect of NPK fertilizer substitution with cow manure on the growth of oil palm seedlings in the pre-nurseries and main nurseries. The experiment was conducted from February to September 2018 in the Banguntapan research and experimental field, Faculty of Agriculture, Universitas Gadjah Mada. The experiment applied the Randomized Complete Block Design (RCBD) with one factor and six blocks as replications. The factors were subtitution using the replacement series method with five levels of doses, 100% NPK, 75% NPK + 25% cow manure, 50% NPK + 50% cow manure, 25% NPK + 75% cow manure and 100% cow manure. The observed parameter variables were root lenght, root area, hump diameter, leaf area, the number of leaves, plant height and plant dry matter. The use of 25% NPK substitute with 75% organic material was the best result in increasing the growth performance of oil palm seddlings in pre-nursery and main nursery