![]() ![]() Since the invention of the internal combustion (IC) engine, there has been a surge in its applications for the manufacture of automobiles and machinery suitable for transportation and industrial production operations and processes. Keywords: Bioremediation, Biostimulation, Box-Behnken-Design, Hydrocarbons-degrading microbes, Regression models, Spent-engine oil contaminated soil The observed values at this optimum point were 66.92 and 52.65%-dry-weight as TPH-removal and TSP-improvement, respectively. Using numerical technique, the optimum values of the biostimulants required to achieve a predicted maximum TPH-removal and TSP-improvement of 67.20 and 53.42%-dry-weight per kg of the contaminated soil were as follows: cow-manure − 125.0 g, poultry-manure − 100.0 g and NPK-fertilizer − 10.5 g. Validation of the models showed that there was no significant difference between the predicted and observed values of TPH-removal and TSP-improvement. ![]() The two models were found to be highly significant and good predictors of the response fate of TPH-removal and TSP-improvement, as indicated by their coefficients of determination: R 2 = 0.9982 and R 2 = 1.000 at p ≤ 0.05, respectively. Ex-situ data generated in assessing the degree of biodegradation in the soil were used to develop second-order quadratic regression models for both TPH and TSP. Three levels of cow-manure, poultry-manure and inorganic nitrogen-phosphorus-potassium (NPK) fertilizer were used as independent biostimulants variables while reduction in total petroleum hydrocarbon (TPH) and total soil porosity (TSP) response as dependent variables were monitored under 6-week incubation. With this optimum performance HPLC system, efficiency and accuracy are guaranteed for all liquid chromatography applications.This paper presents a preliminary investigation of the optimum nutrients combination required for bioremediation of spent-engine oil contaminated soil using Box-Behnken-Design. ![]() Both detector modules feature front access for switching flow cells and lamps. Unicam helios alpha service manual series#Detector modules are typically either a Series Variable Wavelength (VWD) or a Diode Array (DAD) detector, both of which utilize a holmium oxide filter to verify wavelength and diagnose the system’s performance. ![]() Although there are many modules and accessories, the system is usually configured to include a pump, detector, autosampler, vacuum degasser, solvent module, software, computer, and cables. Unicam helios alpha service manual software#Dynamic software provides comprehensive diagnostics that both improve data analysis and make troubleshooting convenient, thus ensuring that operation is intuitive and maintenance is avoided.ĭue to the modular nature of this HPLC system, a variety of configurations are possible to meet the needs of new and changing applications making this platform incredibly versatile as well as efficient. The incorporation of the vacuum degasser is a critical aspect of the Hewlett-Packard 1100’s design, as it circumvents the need to use helium thereby minimizing operating cost while maintaining reliable results and excellent performance. The system features a high speed proportioning valve, a vacuum degasser, and an integrated inlet valve that serves to eliminate the formation of vapors in less stable solvents by matching the strokes of the pistons. Results are delivered quickly and accurately via effective mixing and solvent transmission that is essentially pulse free. The Hewlett-Packard 1100 HPLC System is a modular liquid chromatography system designed to provide precision and reproducibility in high throughput applications. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |