A case study targeting K fertilizer chemical synthesis with complete valorization of extraction by-products as an option

2020 ◽  
Vol 22 (20) ◽  
pp. 6954-6966 ◽  
Author(s):  
Jiangyan Yuan ◽  
Hongwen Ma ◽  
Ruoyu Guo ◽  
Xi Ma ◽  
Sridhar Komarneni
Keyword(s):  
Chemical Synthesis ◽  
Chemical Route ◽  
Silicate Minerals ◽  
K Fertilizer ◽  
By Products ◽  
Maximum Utilization

A green and sustainable chemical route to extract potassium and realize maximum utilization of potassium-rich silicate minerals.

Optimization of chlorine-based disinfection for the control of disinfection by-products formation and CODMn: A case study

2012 ◽  
Vol 197 ◽  
pp. 116-122 ◽  
Author(s):  
Ruiping Liu ◽  
Chuan Tian ◽  
Xiaoling Liu ◽  
Han Jiang ◽  
Huijuan Liu ◽  
...  
Keyword(s):  
By Products

PEER REVIEW ORIGINAL RESEARCH: EHS & LCA assessment for 7-ACA synthesis A case study for comparing biocatalytic & chemical synthesis

2008 ◽  
Vol 4 (2) ◽  
pp. 180-192 ◽  
Author(s):  
Richard K. Henderson ◽  
Concepción Jiménez-González ◽  
Chris Preston ◽  
David J.C. Constable ◽  
John M. Woodley
Keyword(s):  
Chemical Synthesis ◽  
Peer Review ◽  
Original Research

scholarly journals Application of Biogas Production Technology from Various Feedstocks on Small-Medium-Micro Enterprises: A Case Study

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Ari Diana Susanti ◽  
Cornelius Satria Yudha ◽  
Leader Firstandika ◽  
Paryanto Paryanto ◽  
Wusana Agung Wibowo
Keyword(s):  
Energy Consumption ◽  
Biogas Production ◽  
Economic Value ◽  
Cow Dung ◽  
Engineering Problems ◽  
Medium Enterprises ◽  
By Products ◽  
Biogas Technology ◽  
Micro Enterprises

<p>Biogas production process is an alternative method to reduce dependency on non-renewable fossil-based energy consumption and also can reduce greenhouse gases production both domestically and industrially. The existing biogas technology is suitable to be adapted in small-micro-medium enterprises and domestics, specifically for those who raise cattle. The case study was performed by observation of biogas production with various wastes as feed, namely cow dung, quail manure, and wastewater of tofu production. The study conducted via direct interviews with stake holders and visitations to the instalations. Based on our observation, biogas production from cow dung exhibits the shortest retention time compared to the others, aside from the value of C/N ratio of the biogas feedstocks. The presence of biogas production installations are significantly reducing the energy supplies among the users. Beside as biogas product, the instalations also produce solid and liquid fertilizers as by-products and have relatively high economic value. Socio – engineering problems based on the application of biodigester are also studied.</p>

Effects of tributary inflow and sediment input on reservoir turbidity current formation and evolution

2021 ◽  
Author(s):  
Yining Sun ◽  
Ji Li ◽  
Zhixian Cao ◽  
Alistair G.L. Borthwick
Keyword(s):  
Yellow River ◽  
Sediment Concentration ◽  
Turbidity Current ◽  
Turbidity Currents ◽  
Front Speed ◽  
Sediment Input ◽  
Formation And Evolution ◽  
Maximum Utilization

&lt;p&gt;For reservoirs built on a hyper-concentrated river, tributary inflow and sediment input may affect the formation and evolution of reservoir turbidity current, and accordingly bed morphology. However, the understanding of tributary effects on reservoir turbidity currents has remained poor. Here a series of laboratory-scale reservoir turbidity currents are investigated using a coupled 2D double layer-averaged shallow water hydro-sediment-morphodynamic model. It is shown that the tributary location may lead to distinctive effects on reservoir turbidity current. Clear-water flow from the tributary may cause the stable plunge point to migrate upstream, and reduce its front speed. Sediment-laden inflow from the tributary may increase the discharge, sediment concentration, and front speed of the turbidity current, and also cause the plunge point to migrate downstream when the tributary is located upstream of the plunge point. In contrast, if the tributary is located downstream of the plunge point, sediment-laden flow from the tributary causes the stable plunge point to migrate upstream, and while the tributary effects on discharge, sediment concentration, and front speed of the turbidity current are minor. A case study is presented as of the Guxian Reservoir (under planning) on the middle Yellow River, China. The present finding highlights the significance of tributary inflow and sediment input in the formation and propagation of reservoir turbidity current and also riverbed deformation. Appropriate account of tributary effects is warranted for long-term maintenance of reservoir capacity and maximum utilization of the reservoir.&lt;/p&gt;

scholarly journals Bromine Recycling in the Chemical Industry – An Example of Circular Economy

2019 ◽  
Vol 73 (9) ◽  
pp. 737-742
Author(s):  
Francis Pilloud ◽  
Nasibeh Pouransari ◽  
Luc Renard ◽  
Rebecca Steidle
Keyword(s):  
Chemical Synthesis ◽  
Environmental Risk ◽  
Chemical Industry ◽  
Circular Economy ◽  
Closed Loop ◽  
Industrial Ecology ◽  
Real Life ◽  
Significant Safety ◽  
Recovery Yield

This paper discusses the application of the circular economy concept and industrial ecology approach in the context of industrial chemical sites. A real-life case study about the use of bromine as reactant for chemical synthesis and its recycling by Syngenta in Monthey is described in detail. With a recovery yield of 97% it represents a well-established example of closed loop recycling, one aspect of the circular economy. The process leads to significant safety and environmental risk reduction and economic savings in the order of several million CHF per year.

scholarly journals Framework toward More Sustainable Chemical Synthesis Design—A Case Study of Organophosphates

2019 ◽  
Vol 7 (7) ◽  
pp. 6744-6757 ◽  
Author(s):  
Michael A. Gonzalez ◽  
Sudhakar Takkellapati ◽  
Kidus Tadele ◽  
Tao Li ◽  
Rajender S. Varma
Keyword(s):  
Chemical Synthesis ◽  
Synthesis Design

scholarly journals Reconsidering Hydrosols as Main Products of Aromatic Plants Manufactory: The Lavandin (Lavandula × intermedia) Case Study in Tuscany

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2225 ◽  
Author(s):  
Matteo Politi ◽  
Luigi Menghini ◽  
Barbara Conti ◽  
Stefano Bedini ◽  
Priscilla Farina ◽  
...  
Keyword(s):  
Seed Germination ◽  
Insect Pest ◽  
Aromatic Plants ◽  
Natural Herbicide ◽  
The One ◽  
Behavioural Tests ◽  
First Time ◽  
By Products ◽  
Coleoptera Tenebrionidae

The present work evaluates for the first time two Lavandin (Lavandula × intermedia Emeric ex Loisel.) aromatic waters obtained from different plant organs, the flowers and the stems. Both extracts were analysed by GC-MS, which indicates semi-quantitative differences between the major metabolites including linalool, 1,8-cineole, camphor, linalyl acetate and 4-terpineol. 1H-NMR and LC-MS investigation confirmed the presence of these compounds. Moreover, behavioural tests with the food insect pest Tribolium confusum (Coleoptera Tenebrionidae) showed a good repellency for both hydrosols extracts with RD50 values of 3.6 and 3.3 µL·cm−2 for the flowers and stems, respectively; at the higher concentrations, however, the hydrosol extract from the flowers is expected to be more effective than the one from the stems. The effect of the flowers and stems aromatic water of Lavandin on seed germination of Raphanus sativus was also evaluated. Results showed that seed germination was completely inhibited by flowers hydrolate, having a possible application as natural herbicide. The overall experience with these Lavandin extracts indicates the potential of improved hydrolates to become the main distillation products, rather than by-products, of the aromatic plants manufacturing; this stimulates further discussions about the potential positive impacts that such a shift could have in the context of ecopharmacognosy.

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