2 research outputs found
Influence of Stepwise Increased Organic Loading on Anaerobic Mono-digestion of Dead Fish in Sequencing Batch Reactor Process
No full text© 2022, The Author(s), under exclusive licence to Springer Nature B.V.Highly nutrient content dead fish (DF) waste can be considered a potentially valuable substrate for the anaerobic digestion (AD) to produce biogas. The effects of stepwise increased organic loading rate (OLR) on the process performance were investigated during mono-digestion of DF waste in anaerobic sequencing batch reactor mode. Two different sets of experiments have been conducted using whole dead fish (RDF) and boneless dead fish (RBDF) and OLR increased in five steps (1.95, 2.39, 2.73, 3.19, and 3.64 g VS/L/days) during the operational period. With the increasing of OLR, the biogas production rate increased by 79.07% and 58.20% at the end of the operation of RDF and RBDF, respectively. Higher alkalinity values throughout the experiment maintained stable pH values in between 7.87 to 8.01 for both RDF and RBDF. Total volatile fatty acids kept accumulating with the increasing OLR and the final concentrations were 7.69 ± 0.16 and 8.33 ± 0.19 g/L in RDF and RBDF, respectively. Overall, decreasing COD and VS removal efficiencies resulted in decreasing methane yields. The energy recovery rate was maintained at > 60% with the maximum OLR of 3.64 g VS/L/d of DF waste demonstrating its feasibility in the AD process as the only carbon source. Graphical Abstract: [Figure not available: see fulltext.].11Nsciescopu
Adoption of E-hailing Applications: A Comparative Study between Female and Male Users in Thailand
Get PDFE-hailing, a process of ordering a taxi via mobile devices, has become popular in Thailand recently. This study focuses on applying Diffusion of Innovations Theory and Technology Acceptance Model in examining the factors affecting adoption of e-hailing applications in Thailand. The objective of this comparative study is to find significant factors influencing female and male users to adopt E-hailing applications. The hypotheses are constructed to test the influence of five factors on consumers’ attitude. This study uses a survey to collect data from 200 female and 200 male users who have experienced using e-hailing applications. The results indicate that the relative advantages and ease of use have an influence towards the adoption of e-hailing applications in both genders. Interestingly, social influence and physical security influence the adoption of e-hailing applications for among male users only
