Subiantoro, Rijadi
Politeknik Negeri Lampung

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Efektivitas Kombinasi Lumpur Aktif dan Natrium Bikarbonat (NaHCO3) dalam Pengelolaan Limbah Cair Industri Tebu (Saccharum officinarum L.) Sanjaya, Refky; Subiantoro, Rijadi; Supriyatdi, Dedi
Jurnal Agro Industri Perkebunan Volume 5 No. 1, Mei 2017
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v5i1.650

Abstract

In the sugarcane processing into sugar, it will produce g. About 52,9% of liquias, solid, and luquid waste. About 52,9% of liquid waste cause many problems. If the liquid waste directly discharged into the waters, it will cause pollution of water bodies, as well as air pollution around the river. The objective of this study is to obtain the effective and duration activity of the combination of active sludge and sodium bicarbonate in reducing the sugarcane industry of liquid waste. In this research, liquid waste management is done by aerobicized batch system stagnant in laboratory scale with the descriptive analysis. Biodegradation treatment is given to the liquid waste derived from anaerobic ponds in Bunga Mayang Sugar Mill, North Lampung. The treatment is L0 = without treatment (control), L1 = without sludge + 5 g.l-1 sodium bicarbonate, L2 = 100 ml.l-1 active sludge + 5 g.l-1 sodium bicarbonate. The result showed that application of 100 ml.l-1 active sludge + 5 g.l-1 sodium bicarbonate can increase the pH to 7,85, increase DO to 0,16 mg.l-1, reduce COD to 48,18%, increase sulfide content to 90,44%, increase turbidity to 95,4%, increase the wastewater temperature to 35oC, and the time required is shorter than the conventional anaerobic pools.   Keywords: active sludge, liqud waste, sodium bicarbonatePermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/650
Optimasi Pemberian Lumpur Aktif dan Dolomit dalam Pengolahan Limbah Cair Pabrik Kelapa Sawit Widayanti, Erni; Subiantoro, Rijadi; Parapasan, Yonathan
Jurnal Agro Industri Perkebunan Volume 6 No. 1, Mei 2018
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/jaip.v6i1.671

Abstract

The palm oil mill effluent (POME) generally has very high of BOD and COD contents, so it must be processed before it is drained to the body water. The purpose of this research was to determine the capability of active sludge and dolomite rate and the combination both of them in reducing the palm oil industry liquid waste. This research was conducted in December 2016 until January 2017 at Chemical Analysis Laboratory, State Polytechnic of Lampung. This research consists of two factors. First factor was the use of active sludge (without active sludge and 1 kg of active sludge), and the second factor was dolomite rate (0,3%, 0,6%, and 0,9% dolomite).The results obtained were calculated bassed on average repetitions then at compared with the value of initial analysis and quality standard, but the COD value is calculated based on the percentage of the reduction value, and all the observed values are presented in the graph. The results showed that the 1 kg active sludge treatment was more effective in degrading the wastewater than with no active sludge. The increased dose of dolomite to 0.9% combined with 1 kg of active sludge will be followed by an increase in pH (6,23) and DO (0,26 mg.l-1), but decrease COD to 53,7%, TSS to 810 mg.l-1, turbidity value to 700 NTU, and potassium content to 4865 mg.l-1.                                                 Keywords: chemical oxygen demand, dissolved oxygen, palm oil mill effluent, total suspended solid, turbidity
Pengaruh Lama Fermentasi pada Kualitas Pupuk Kandang Kambing Wijaksono, Rino Anggi; Subiantoro, Rijadi; Utoyo, Bambang
Jurnal Agro Industri Perkebunan Volume 4 No. 2, Oktober 2016
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v4i2.50

Abstract

Goat is one of animal by the village people in Indonesia is one of the goat farm animals are much in demand by the people of the village. Adult goats capable  produce solid fecal waste as much as 0.5 kg per day, in the long term this will be a problem if not handled properly. Goat manure can be used as fertilizer. In the manufacture of manure requires serious attention because during the fermentation progresses, there is  variety of transformation processes in fertilizers. The purpose of this study was to observe the effect of fermentation on the quality of goat manure. This study was conducted in State Polytechnic of Lampung in October 2014 until February 2015. The experimental design used was a randomized block design (RBD) consisted of six treatment fermentation period:  2, 4, 6, 8, 10, and 12 weeks with three replications.length of fermentation showed the presence of a marked influence on C/N ratio. The value of C/N ratio has decreased accordance with the length of fermentation time, indicated in the treatment of older fermentation 8, 10, and 12 which have a value of C/N ratio is getting smaller 15, 12, and 10.The nutrient content of N and P unless the element K not significantly different, but all three have increased. Based on research that has been done, it can be concluded that the length of fermentation effect on the value of C/N ratio, the content of N and P, but has no effect on the value of the content of K manure goats and best quality was obtained in treatment fermentation period of 10 weeks with a value of C/N ratio 12 and N content of 1.16%, P: 1.01%, and K: 1.27%.Keywords: fermentation duration, goat manure, organic fertilizerPermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/50
Pengaruh Penggunaan Kompos Pelepah Kelapa Sawit dengan Berbagai Mikroorganisme Lokal (MoL) dan Cara Aplikasinya terhadap Sifat Fisik Tanah dan Produksi Tembakau (Nicotiana tabacum L.) Sinaga, Aviv Event Adviadri; Subiantoro, Rijadi; Fatahillah, Fatahillah
Jurnal Agro Industri Perkebunan Volume 3 No. 1, Mei 2015
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/aip.v3i1.15

Abstract

Organic fertilizer has the advantage of containing nutrients more complete than the inorganic fertilizer albeit in relatively small quantities. In general, organic fertilizers may contribute to improve the physical, chemical, and biological soil. Peneltian purpose compost To determine the effect of palm fronds on the physical properties of the soil (moisture content, bulk density and porosity of the soil) and dry weight of leaf tobacco. The experiment was conducted in September 2015 in State Polytechnic of Lampung experimental  garden, arranged in a randomized block design factorial with bio-activator treatment differences in the way applications compost mixed with soil and on the ground. Soil sampling was take 5 cm above ground. Observations carried out on soil water content, bulk density, porosity of the soil and leaf dry weight. The results showed that compost of oil palm fronds affect the physical properties of the soil, but not significantly different to the dry weight of leaf tobacco.Keywords: compost, soil physical properties, tobaccoPermalink: http://jurnal.polinela.ac.id/index.php/AIP/article/view/15
Pengaruh Kombinasi Media Lapisan Tanah dan Takaran Cocopeat pada Pertumbuhan Bibit Kakao (Theobroma cacao L.) Saputra, Eko; Subiantoro, Rijadi; Gusta, Adryade Reshi
Jurnal Agro Industri Perkebunan Volume 7 No. 1, 2019
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/jaip.v7i1.1051

Abstract

Efforts to produce good quality cocoa seedling in quality and quantity, ie the use of planting media containing nutrients needed by plants. Topsoil and cocopeat combination are expected to increase the growth of cocoa seedling. The purpose of this study was to to obtain a good soil layer medium planting on the growth of cocoa seedling, to obtain optimum cocopeat on the growth of cocoa seedling, and to obtain the interaction of soil layer medium planting and cocopeat on the growth of cocoa seedlings. This research was conducted in Politeknik  Negeri Lampung’s Teaching Farm in January 2017 until June 2017. The experiment was conducted by factorial randomized block design with two factors and each treatment combination was repeated 3 times. The first factor consists of two levels and the second factor consists of four levels. The first factor, namely top soil and sub soil. The second factor is composting cocopeat on planting medium consisting of 0% cocopeat and 100% soil, 25% cocopeat and 75% soil, 50% cocopeat and 50% soil, 75% cocopeat and 25% soil. The results showed that the cocopeat 0%-75% gave the same effect on the high varieties of seedlings, stem diameter, number of leaves, total dry weight, and dry root weight. In general, top soil and sub soil medium planting did not affected on the growth of cocoa seedling and cocopeat did not affected on the growth of cocoa seedling. There was no interaction between media layer of soil and cocopeat in all observation variables.   Keywords: cocopeat, cocoa seedling, sub soil, and top soil