Process engineering

This paper demonstrates a successful implementation through a case study in wood manufacturing. The enhancement greatly benefited from the optimization of the production process. The seven quality control tools were integrated into specific systematic steps of the PDCA cycle and DMAIC process, along with lean technology.

12p viling 11-10-2024 7 1   Download

The research results are aimed at providing materials for use in training engineers specializing in urban environmental engineering. It is also a reference for engineers who directly perform operational management at waste power plants or scientists and managers interested in research in the field of domestic solid waste management.

6p vibecca 01-10-2024 2 1   Download

The prediction of ground settlement under tunnel excavation is still challenge. Almost engineer uses Mohr-Coulomb model in practice due to the conventional geotechnical investigation data. This paper describes the study of tunnel lining behaviors and ground surface settlement under tunneling process with a typical case study of twin tunnels excavation in Ho Chi Minh city, Vietnam.

11p vibecca 01-10-2024 1 1   Download

With the rapid growth of economic development, the circular economy has been raised in many international environmental and socio-economic conferences and forums nowadays. The recycling of plastic waste was one of those aspects. This paper studied the potential of directly reusing plastic bottle caps as bio-carriers in moving bed bioreactors without further waste processing.

11p viyoko 01-10-2024 3 1   Download

Wastewater of Sao Thai Duong Pharmaceuticals & Cosmetics Factory contains high concentration (more than 1000 mg/l) COD and BOD. Besides, some persistent substances are also found such as surfactants, emulsion oil and ammonium.

10p vifilm 24-09-2024 2 1   Download

The main purpose of the study was (i) to evaluate the effect of nitrogen treatment on domestic effluent of the model system, (ii) to determine the appropriate water retention time of the system.

10p vifilm 24-09-2024 3 1   Download

Timely monitoring the large-scale civil structure is a tedious task demanding expert experience and significant economic resources. Towards a smart monitoring system, this study proposes a hybrid deep learning algorithm aiming for structural damage detection tasks, which not only reduces required resources, including computational complexity, data storage but also has the capability to deal with different damage levels.

12p vifilm 24-09-2024 3 1   Download

Unexpected defects of concrete in a completed bored pile can arise during the construction stage. Therefore, post-construction testing of bored pile concrete is an important part of the design and construction process. The Cross-hole Sonic Logging (CSL) method has been the most widely used to examine the concrete quality.

11p vifilm 24-09-2024 3 1   Download

This study aimed to investigate the possibility of degrading the pesticides of the BAC process. Based on the promising results in the full-scale reactor receiving river water, a lab-scale reactor was installed to study the pesticide removal mechanism and the contribution of nitrifying bacteria to the removal efficiency.

13p vifilm 24-09-2024 2 1   Download

The research uses a mathematical method to aims to: (1) investigate the characteristics of bid compensation, (2) analyze the effectiveness of bid compensation in helping develop appropriate strategies from an owner’s perspective for projects where the bid preparation costs are high, (3) add to the existing literature on tender management.

13p vifilm 24-09-2024 5 1   Download

This paper aims to use the AdaBoost-DE algorithm for optimizing steel roof trusses. The AdaBoost-DE employed in this study is a hybrid algorithm in which the AdaBoost classification technique is used to enhance the performance of the Differential Evolution algorithm by skipping unnecessary fitness evaluations during the optimization process. An example of a duo-pitch steel roof truss with a span of 24 meters is carried out.

12p vifilm 24-09-2024 3 1   Download

In Vietnam, there have been some studies on desalination but mostly on low and stable salinity and small-scale system. In fact, the salinity varies quite substantialy within seasons. Thus, the main objective of this study is therefore to evaluate the brackish water treatment capacity of different nanofiltration (NF) processes for domestic and drinking water supply for residential areas in Thu Bon river basin.

7p viyoko 24-09-2024 3 1   Download

According to the planning of cattle and poultry slaughterhouse and processing systemup towards 2020, Hanoi city approvedwith 10 planned industrial slaughterhouse sites and 34 planned semi-industrial slaughterhouse sites. The amount of slaughterhouse wastewater is calculated of about 2,300-6,100 m3 / day, excluding wastewater from small and uncontrolled slaughterhouses.

5p viyoko 24-09-2024 2 1   Download

his paper does not mention about the partial nitritation process. The results showed that, with the operational time of 193 days, the influent T-N concentration fluctuated from 90-180 mgN/L, and T-Nremoval efficiency increased from 29.4% to 61.4% in stepwise.

7p viyoko 24-09-2024 2 1   Download

The present paper focus on the phenomenon of unsteady flow which happens in complex headrace channel of hydropower project when flow rate suddenly changes. In practice, this problem has not been well taken into account in design and operation process, especially when the effects of intake, lateral weir and fore-bay on the headrace channel simultaneously considered.

6p viyoko 24-09-2024 4 1   Download

The main objective of the research is: 1) to propose an urban design process with the participation of community in improvement or design roads and streets a major type of public space in Hanoi and other cities in general; 2) to define main steps, content of each step and possible output of an urban design process; 3) to define opportunity, level of participation of community in each step in the process, together with necessary technique and toolkit for community participation.

15p viyoko 24-09-2024 3 1   Download

This paper focuses on a series of factors affecting labour productivity on construction site in Hanoi. The research aims to evaluate and rate the extent of impact of each factor to labour productivity.

12p viyoko 24-09-2024 1 1   Download

This paper presents the experimental results of researching on plastic shrinkage (plastic deformation) and the effect of curing methods on the process of plastic shrinkage at the early stages when self-compacting concrete (SCC) starts setting and develops the strength.

12p viyoko 24-09-2024 3 1   Download

This paper aims to analyze the integration of Lean construction principles in the BIM coordination process through a specific case study. The project management unit is responsible for managing and evaluating BIM models from consultants and contractors and serves as the project’s BIM coordinator.

8p viyoko 24-09-2024 1 1   Download

This paper presents the data processing method using Hilbert Huang Transform (HHT) algorithm in determining a time-dependent frequencies of steel frame. The vibration experiment for steel frame was conducted in this study.

10p viyoko 24-09-2024 2 1   Download