Optimalisasi Proses Bioremediasi Secara In Situ Pada Lahan Tercemar Pestisida Kelompok Mankozeb

Compost as an organic fertilizer could improve the physical, chemical, and biological characteristics of the soil in a certain way so that soil mineral was available for plant. The special aim of this research was to optimize the bioremediation process for degradation of pesticide residues at Bedugul Agro-tourism so that organic farming system will be sustainable. Based on C/N, and pH, it could be concluded that better solution for bioremediation of pesticide residue problem was by giving mixed-compost in horticulture cultivation. Deviation of pH in bioremediation process was 0.22, and pH in-situ bioremediation process was between 6.9 and 7.12 or neutral pH. In this condition micro-organism would be effective in degrading pesticide residue. Bioremediation process on pesticide residue of Ditane M-45 at horticulture cultivation deploy with 1.2 g/l/20 m2, 2.4 g/l/20 m2, and 3.6 g/l/20 m2 spraying dosages took place perfectly, which was showed by parameters on development of micro-organism population and the amount of pesticide residues. Pesticide residue of each spraying dosages was 0.25–1.7% at 35 days or this values were under 0.003 ppm

Improving Physical and Chemical Soil Characteristic on Potatoes (Solanum tuberosum L.) Cultivation by Implementation of Leisa System

AbstractThe use of compost and N, P, K as fertilizer in LEISA system as an effort to increase the productivity of potato in Bali so that up to 30 tones / ha performed in this study. Compost from chicken and cow dung is used at a dose of 10 to 25 tones / ha. Application of LEISA systems can improve the physical and chemical characteristics of the soil so as to achieve ideal conditions for the cultivation of potatoes. By 2015, the land has the characteristics: porosity of 47 ± 5.1%, the water holding capacity of 40.9 ± 4% w.b, organic matter content of 6.2 ± 1.2%, the cation exchange capacity 25-29 me / 100g and pH 6.7 to 6.9. Productivity potatoes applied for land LEISA systems over 3 years is 28-34 tones / ha with tuber super quality as much as 11 to 22.2 tones / ha

Kajian Atmosfir Terkendali untuk Memperlambat Penurunan Mutu Buah Mangga Arumanis selama Penyimpanan

Arumanis Mango (Mangifera indica L. cv Arumanis) which is one of Indonesia’s tropical fruits having a high potency to be developed as an export commodity. Limited volumes of the fruit have been exported using air cargo and attempts in using sea freights with reefer containers for long distance market had not given convincing result. Therefore, efforts in optimizing the use of a reefer container are essential. Investigations, were performed in order to decelerate the deterioration fruits which involved different combined concentrations of O2 and CO2 gases during storage of Arumanis mango at cold (12+1.5oC) and room (28+2oC) temperatures. Four different combined gases of O2 and CO2, namely 5% O2 and 5 % CO2; 5% O2 and 10% CO2; 10% O2 and 5% CO2; and 10% O2 and 10% CO2 were surged surrounding the fruits stored at the cold and room temperatures. Fruits without treatments with the combined gases were prepared as kontrols. The investigation indicated that the cold temperature of storage was still the best way to slowing down the deterioration of the fruit. There were no significant different effects on the rate of deterioration among the fruits treated with the different combined concentrations of O2 and CO2. The controlled atmospheres, however, were better for storing the fruits compared to those stored without controlled atmosphere.Key words: controlled atmosphere, Arumanis, mang

Selection and the Growth Condition Optimization of Ethanol‐Producing Microbes Isolated from Ragi Tapai

Ethanol is a biofuel produced from renewable resources, which potentially plays an important role in solving future fuel problems. This study aimed to select the highest ethanol-producing isolate from candidates obtained from previously isolated candidates from ragi and cassava tapai. The selection process was conducted in 2 stages, namely: 1) Selection of the highest ethanol-producing isolate from seven isolate candidates using PYG media containing peptone, yeast extract, and glucose at 0.75%, 0.75%, and 15%, respectively and was followed by: 2) Optimization of the growth conditions of the highest ethanol-producing isolate, which was conducted at various temperatures of 27, 30, 33, 35, 37, and 40°C with the combination of various pH of 3.5, 4.5, 5.5, and 6.5. The experimental results showed that the R5I3 isolate was the highest ethanol-producing performance isolate, which yielded approximately 4.69±0.25% (v/v). Following the temperature and pH optimization of the fermentation processes, the optimum growth conditions were at 35°C and pH 5.5, where the ethanol produced was increased to 8.63 ± 0.04% (v/v). With these results, this new strain has the potential to be used in bioethanol production processes and other industrial applications

Bioproses limbah pertanian

xiv, 98 p. ; 23 cm

Bio Proses Limbah Pertanian

xiv, 98 p. ; 23 cm

PELATIHAN PEMANFAATAN POWER THRESHER DAN MANAJEMEN USAHA BAGI KELOMPOK USAHA PANEN PADI PEMULA DI SUBAK DESA KABUPATEN GIANYAR

Policy of product increase of national rice requires the development of adequate post harvest handling to improve efficiency, decreasing of losing crop, improving rendemen, added value, and competitiveness. This was done in order to improve earnings and prosperity of farmer in is the rural areas. Efforts to improve side of offfarm paddy especially its postharvest nowadays become attention to be handled seriously.Activity of this training aims at: (1) forming paddy crop group as development of business unit; ( 2) empowering of beginner paddy crop group so that they can apply postharvest technology and manage its agribusiness well; ( 3) training farmers to apply power thresher to minimize losing paddy crop. Participant target in this activity is group member of Subak Desa of Gianyar Regency.The result of this community services activity are as follows ( 1) Socialization of postharvest paddy have improved the understanding of beginner group member of paddy harvest so that they can contribute in lessening the lose paddy crop; ( 2) Forming crop group as the institution for empowering member of subak for developing of business unit; and ( 3) Applied training of power thresher can improve skillful harvest group members to minimize the lose of paddy crop in threshing.</p

Municipal solid waste or MSW has potency to be decomposed by microorganisms and trasformed into compost. The waste contains 60%-75% of organic materials C, H, O, and N. The aim of this research was to develop a simulation model based on mathematical equations describing the phenomenon of the composting. The population of microorganisms , the rate of O2 consumption , the rate of CO2 production , the rate of H2O production, the rate of carbon nitrogen ratio or C/N, and temperature were the variables tested in this research. Validation was carried out by comparing datum of simulation model with datum of composting. Simulation model was declared valid if the values of each parameter were r2 &gt; 0.75, the total value of Err was closed to zero, and the distribution of Err was independent to time. The sensitivity test was analyzed by comparing the value changes of variable tied with the value changes of free variable. Correction from the simulation model in predicting the microorganism population, CO2, O2, and temperature could be expressed respectively as y’ = 1.06(y-1.003), y’ = 1.07(y+ 0.07), y’ = 1.02(y+ 0.05), and y’ = 1.02(y - 1.05). The temperature, the C/N and the rate of O2 consumption were sensitive to the changes of microorganism population and the radius of the bioreactor. Key words: composting, organic materials, simulation, bioreactor

Municipal solid waste or MSW has potency to be decomposed by microorganisms and trasformed into compost.  The waste contains 60%-75% of organic materials C, H, O, and N.  The aim of this research was to develop a simulation model based on mathematical equations describing the phenomenon of the  composting.  The population of  microorganisms , the rate of  O2 consumption , the rate of CO2 production , the rate of H2O production, the rate of carbon nitrogen ratio or C/N, and temperature were the variables tested in this research.  Validation was carried out by comparing datum of simulation model with datum of composting.  Simulation model was declared valid if the values of each parameter were  r2 &gt; 0.75, the  total value of Err was closed  to zero, and the distribution of Err was independent to time.  The sensitivity test was analyzed by comparing the value changes of variable tied with the value changes of free variable.  Correction from the simulation model in predicting the microorganism population, CO2, O2, and temperature  could be  expressed  respectively  as  y’ = 1.06(y-1.003),  y’ = 1.07(y+ 0.07), y’ = 1.02(y+ 0.05), and y’ = 1.02(y - 1.05).  The temperature, the C/N and the rate of  O2 consumption were sensitive to the changes of microorganism population and the radius of the bioreactor.   Key words: composting, organic materials, simulation, bioreacto