scholarly journals Hydrothermal Carbonization as Sustainable Process for the Complete Upgrading of Orange Peel Waste into Value-Added Chemicals and Bio-Carbon Materials

2021 ◽  
Vol 11 (22) ◽  
pp. 10983
Author(s):  
Antonella Satira ◽  
Emilia Paone ◽  
Viviana Bressi ◽  
Daniela Iannazzo ◽  
Federica Marra ◽  
...  
Keyword(s):  
Reaction Temperature ◽  
Pure Water ◽  
Reaction Medium ◽  
Value Added ◽  
Orange Peel ◽  
Hydrothermal Carbonization ◽  
Added Value ◽  
Green Protocol ◽  
Initial Ph ◽  
Orange Peel Waste

In this study, a simple and green protocol to obtain hydrochar and high-added value products, mainly 5-hydroxymethylfurfural (5-HMF), furfural (FU), levulinic acid (LA) and alkyl levulinates, by using the hydrothermal carbonization (HTC) of orange peel waste (OPW) is presented. Process variables, such as reaction temperature (180–300 °C), reaction time (60–300 min), biomass:water ratio and initial pH were investigated in order to find the optimum conditions that maximize both the yields of solid hydrochar and 5-HMF and levulinates in the bio-oil. Data obtained evidence that the highest yield of hydrochar is obtained at a 210 °C reaction temperature, 180 min residence time, 6/1 w/w orange peel waste to water ratio and a 3.6 initial pH. The bio-products distribution strongly depends on the applied reaction conditions. Overall, 180 °C was found to be the best reaction temperature that maximizes the production of furfural and 5-HMF in the presence of pure water as a reaction medium.

Advances in sustainable approaches utilizing orange peel waste to produce highly value-added bioproducts

2021 ◽  
pp. 1-20
Author(s):  
Ali Mohsin ◽  
Muhammad Hammad Hussain ◽  
Waqas Qamar Zaman ◽  
Muhammad Zubair Mohsin ◽  
Junhong Zhang ◽  
...  
Keyword(s):  
Value Added ◽  
Orange Peel ◽  
Orange Peel Waste

The Effect of Calcium-Based Salt on Hydrothermal Carbonization of Corncob

2017 ◽  
Vol 751 ◽  
pp. 477-482
Author(s):  
Promporn Reangchim ◽  
Kamonwat Nakason ◽  
Nawin Viriya-Empikul ◽  
Apiluck Eiad-Ua
Keyword(s):  
Reaction Medium ◽  
Value Added ◽  
Hydrothermal Carbonization ◽  
Raw Material ◽  
Cellulose Crystallinity ◽  
X Ray Diffraction ◽  
Pretreatment Method ◽  
X Ray ◽  
Carbon Microsphere ◽  
Scanning Electron

Corncob represents a great potential as a raw material for the production of high-value added chemicals, fuels and other industrial products. Thus, corncob is suitable residue for study molecular structure through the pretreatment method. In this study, the effect of calcium-based salts on the hydrothermal carbonization (HTC) of corncob were studied at 160, 180, and 200 °C for 2 h. CaSO4 and Ca3(PO4)2 were used as a reaction medium. Hydrochar was characterized by Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and ATR-Fourier transform infrared spectroscopy (ATR-FTIR). Characteristics of the hydrochar varied with calcium-based salt. Cellulose crystallinity in hydrochar decreased dramatically and carbon content in hydrochar obviously increased when Ca3(PO4)2 and CaSO4 were added, respectively. In case of hydrothermal at 180°C with Ca3(PO4)2 and CaSO4, the carbon microsphere was occurred.

Correlations between hydrochar properties and chemical constitution of orange peel waste during hydrothermal carbonization

2018 ◽  
Vol 265 ◽  
pp. 432-436 ◽  
Author(s):  
Kangxin Xiao ◽  
Huan Liu ◽  
Yang Li ◽  
Linlin Yi ◽  
Xiuju Zhang ◽  
...  
Keyword(s):  
Orange Peel ◽  
Hydrothermal Carbonization ◽  
Chemical Constitution ◽  
Orange Peel Waste

Implementasi Analisis Proses Bisnis Sebagai Upaya Pengurangan Biaya

2019 ◽  
Vol 10 (1) ◽  
pp. 1-27
Author(s):  
Aniek Wijayanti
Keyword(s):  
Business Process ◽  
Cost Reduction ◽  
Process Analysis ◽  
Value Added ◽  
Added Value ◽  
Natural Material ◽  
Management Activity ◽  
Procurement Process ◽  
Material Procurement ◽  
The Cost

Business Process Analysis can be used to eliminate or reduce a waste cost caused by non value added activities that exist in a process. This research aims at evaluating activities carried out in the natural material procurement process in the PT XYZ, calculating the effectiveness of the process cycle, finding a way to improve the process management, and calculating the cost reduction that can achieved by activity management. A case study was the approach of this research. The researcher obtained research data throughout deep interviews with the staff who directly involved in the process, observation, and documentation of natural material procurement. The result of this study show that the effectiveness of the process cycle of natural material procurement in the factory reached as much as 87,1% for the sand material and 72% for the crushed stone. This indicates that the process still carry activities with no added value and still contain ineffective costs. Through the Business Process Mechanism, these non value added activities can be managed so that the process cycle becomes more efficient and cost effectiveness is achieved. The result of the effective cycle calculation after the management activities implementation is 100%. This means that the cost of natural material procurement process has become effective. The result of calculation of the estimated cost reduction as a result of management activity is as much as Rp249.026.635,90 per year.

KOMPARASI KINERJA KEUANGAN MELALUI PENDEKATAN ECONOMIC VALUE ADDED (EVA) PADA PERUSAHAAN TRANSPORTASI DI JAKARTA

2018 ◽  
Vol 3 ◽  
pp. 223-232
Author(s):  
Dwi Urip Wardoyo
Keyword(s):  
Financial Performance ◽  
Service Industry ◽  
Economic Value ◽  
Value Added ◽  
Added Value ◽  
Economic Value Added ◽  
Test Analysis ◽  
Transportation Service ◽  
Income Statement

This study aims to compare financial performance through profitability generated by two market participants in the witness transportation service industry in Jakarta, namely PT. BB compared to PT. ETU, this assessment is measured not limited to the profit generated but more than that by measuring financial added value through the concept of Eonomic Value Added produced by the two companies. The population in this study were all taxi transportation service companies in Jakarta. The sampling method selected two taxi companies that have the largest market share in DKI Jakarta, namely BB Taxi and ETU Taxi. The test analysis used in this study is ratio analysis through profit calculation and economic added value from the annual income statement. This study shows that there are (a) determination of the ratio of profit levels, (b) Determination of the comparison of economic value added of the two companies. Keywords :  Financial performance, Economic Value Added (EVA)

scholarly journals Optimization of Synthetic Media Composition for Kluyveromyces marxianus Fed-Batch Cultivation

Fermentation ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 62
Author(s):  
Konstantins Dubencovs ◽  
Janis Liepins ◽  
Arturs Suleiko ◽  
Anastasija Suleiko ◽  
Reinis Vangravs ◽  
...  
Keyword(s):  
Kluyveromyces Marxianus ◽  
Reaction Medium ◽  
Value Added ◽  
Batch Cultivation ◽  
Batch Processes ◽  
Biomass Growth ◽  
High Cell ◽  
Media Composition ◽  
Fed Batch ◽  
Fed Batch Cultivation

The Kluyveromyces marxianus yeast recently has gained considerable attention due to its applicability in high-value-added product manufacturing. In order to intensify the biosynthesis rate of a target product, reaching high biomass concentrations in the reaction medium is mandatory. Fed-batch processes are an attractive and efficient way how to achieve high cell densities. However, depending on the physiology of the particular microbial strain, an optimal media composition should be used to avoid by-product synthesis and, subsequently, a decrease in overall process effi-ciency. Thus, the aim of the present study was to optimise the synthetic growth medium and feeding solution compositions (in terms of carbon, nitrogen, phosphorous, magnesium, and calcium concentrations) for high cell density K. marxianus fed‑batch cultivations. Additionally, the biomass yields from the vitamin mixture and other macro/microelements were identified. A model predictive control algorithm was successfully applied for a fed-batch cultivation control. Biomass growth and substrate consumption kinetics were compared with the mathematical model predictions. Finally, 2‑phenylethanol biosynthesis was induced and its productivity was estimated. The determined optimal macronutrient ratio for K. marxianus biomass growth was identified as C:N:P = 1:0.07:0.011. The maximal attained yeast biomass concentration was close to 70 g·L-1 and the 2-PE biosynthesis rate was 0.372 g·L−1·h−1, with a yield of 74% from 2-phenylalanine.

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