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Full-Text Articles in Engineering
Treatment Of Acidic Groundwater In Acid Sulfate Soil Terrain Using Recycled Concrete: Column Experiments, Gyanendra Regmi, Buddhima Indraratna, Long Nghiem, A. Golab, B Guru Prasad
Treatment Of Acidic Groundwater In Acid Sulfate Soil Terrain Using Recycled Concrete: Column Experiments, Gyanendra Regmi, Buddhima Indraratna, Long Nghiem, A. Golab, B Guru Prasad
Faculty of Engineering - Papers (Archive)
Acidic groundwater generated from pyrite oxidation in acid sulfate (AS) soil is a major geoenvironmental problem in Australia. This study aims to evaluate recycled concrete as a reactive material in permeable reactive barriers (PRBs) for the remediation of acidic groundwater in low-lying AS soil floodplains. Laboratory experiments were systematically conducted to investigate the acid neutralization behavior of recycled concrete and its potential to remove dissolved Al and Fe. The results confirmed that recycled concrete could effectively treat acidic groundwater from an AS soil terrain, resulting in near neutral effluent over a long period with complete removal of Al and Fe. …
Evaluating Waste Concrete For The Treatment Of Acid Sulphate Soil Groundwater From Coastal Floodplains, Gyanendra Regmi, Buddhima Indraratna, Long Nghiem, Laura Banasiak
Evaluating Waste Concrete For The Treatment Of Acid Sulphate Soil Groundwater From Coastal Floodplains, Gyanendra Regmi, Buddhima Indraratna, Long Nghiem, Laura Banasiak
Faculty of Engineering - Papers (Archive)
The treatment of acidic groundwater generated from acid sulphate soil (ASS) terrain is a challenging environmental issue in coastal floodplains of Australia. In this study, a laboratory column experiment was conducted to assess the performance of waste concrete for treating the acidic groundwater leachate from ASS terrain of the Shoalhaven region of NSW. The groundwater was highly acidic (pH of 2.5–3.5) and contained elevated concentrations of iron (10–90 mg/L) and aluminium (30–45 mg/L). Passage of the acidic groundwater through the column filled with waste concrete resulted in a significant improvement in water quality. Reduction in the concentration of iron and …
A Real-Time Measuring Technology For Studying Distortion Of Hydraulic Turbine Blade Castings During Heat Treatment Process, Hailiang Yu, Jinwu Kang, Gang Nie, Haimin Long, Xiaokun Hao, Tianyou Huang
A Real-Time Measuring Technology For Studying Distortion Of Hydraulic Turbine Blade Castings During Heat Treatment Process, Hailiang Yu, Jinwu Kang, Gang Nie, Haimin Long, Xiaokun Hao, Tianyou Huang
Faculty of Engineering - Papers (Archive)
During heat treatment process, the distortion behavior inevitably appears in hydraulic turbine blade castings. In this research, a technology was developed for real-time measurement of the distortion in hydraulic turbine blade castings at the still air cooling and forced air cooling stages during heat treatment process. The method was used to measure the distortion behavior at the cooling stages in both normalizing and tempering processes. At the normalization, the distortion at the blade corner near outlet side undergoes four stages with alternating bending along positive and negative directions. At the tempering stage, the distortion could be divided into two steps. …
Is Halogen Content The Most Important Factor In The Removal Of Halogenated Trace Organics By Mbr Treatment?, Faisal I. Hai, Nichanan Tadkaew, James A. Mcdonald, Stuart J. Khan, Long Nghiem
Is Halogen Content The Most Important Factor In The Removal Of Halogenated Trace Organics By Mbr Treatment?, Faisal I. Hai, Nichanan Tadkaew, James A. Mcdonald, Stuart J. Khan, Long Nghiem
Faculty of Engineering - Papers (Archive)
Incorporating Sustainable Practice in Mechanics of Structures and Materials covers a wide range of topics, from composite structures, via fire engineering and masonry structures, to timber engineering. Valuable reference for academics, researchers and practicing engineers working in structural engineering and structural mechanics. Summary Incorporating Sustainable Practice in Mechanics of Structures and Materials is a collection of peer-reviewed papers presented at the 21st Australasian Conference on the Mechanics of Structures and Materials (ACMSM21, Victoria, University, Melbourne, Australia, 7th – 10th of December 2010). The contributions from academics, researchers and practicing engineers from 17 countries, mainly from Australasia and the Asia-pacific region, …
Roadside Rest Area Wastewater Treatment System: Performance Evaluation And Improvement, Adam Kiss, Faisal I. Hai, Long Nghiem
Roadside Rest Area Wastewater Treatment System: Performance Evaluation And Improvement, Adam Kiss, Faisal I. Hai, Long Nghiem
Faculty of Engineering - Papers (Archive)
The performance of a decentralised sewage treatment plant located at a rest area servicing a major freeway was investigated. Long term monitoring and rigorous analyses undertaken in this study revealed several unique and challenging issues associated with such scarcely studied systems. Data collected over a six month period showed that the raw wastewater strength was well above typical household wastewater characteristics, with the average BOD5, COD, TOC, TN and TP values of 880, 4900, 350, 238 and 8 mg/L, respectively. The system performance was considerably lower than that expected of a typical wastewater treatment unit. Several shortcomings in …
Removal Of Trace Organics By Mbr Treatment: The Role Of Molecular Properties, Nichanan Tadkaew, Faisal I. Hai, James A. Mcdonald, Stuart J. Khan, Long Nghiem
Removal Of Trace Organics By Mbr Treatment: The Role Of Molecular Properties, Nichanan Tadkaew, Faisal I. Hai, James A. Mcdonald, Stuart J. Khan, Long Nghiem
Faculty of Engineering - Papers (Archive)
This study examined the relationship between specific molecular features of trace organic contaminants and their removal efficiencies by a laboratory scale membrane bioreactor (MBR). Removal efficiencies of 40 trace organic compounds were assessed under stable operating conditions. The reported results demonstrate an apparent correlation between chemical structures and the removal of trace organic contaminants by the laboratory scale MBR system. The removal of all 14 very hydrophobic (Log D > 3.2) trace organic compounds selected in this study was consistently high and was above 85%. The occurrence and types of electron withdrawing or donating functional groups appear to be important factors …
Treatment Of Saline Aqueous Solutions Using Direct Contact Membrane Distillation, Long Nghiem, Florian Hildinger, Faisal I. Hai, Tzahi Cath
Treatment Of Saline Aqueous Solutions Using Direct Contact Membrane Distillation, Long Nghiem, Florian Hildinger, Faisal I. Hai, Tzahi Cath
Faculty of Engineering - Papers (Archive)
The treatment of highly saline aqueous solutions using direct contact membrane distillation (DCMD) was evaluated in this study. Experiments were conducted using a flat sheet polytetrafluoroethylene membrane with nominal pore size of 0.22 µm. Seawater, reverse osmosis (RO) concentrate collected from a wastewater reclamation plant, and a synthetic solution containing 2,000 mg/L of CaSO4 were selected as the representative saline solutions. A gradual decline in permeate flux was observed at the beginning of the experiments when the seawater and RO concentrate solutions were treated using the DCMD process, most likely due to initial organic fouling and scaling. In contrast, …
Treatment Of High Tds Liquid Waste: Is Zero Liquid Discharge Feasible?, Alexander Robertson, Long Nghiem
Treatment Of High Tds Liquid Waste: Is Zero Liquid Discharge Feasible?, Alexander Robertson, Long Nghiem
Faculty of Engineering - Papers (Archive)
A zero liquid discharge treatment system for the disposal of saline industrial liquid waste was proposed and evaluated in this study. Microfiltration was selected as a pretreatment process after a qualitative assessment against `conventional¿ options. Two reverse osmosis (RO) membranes were examined for the pre-concentration of liquid waste using a laboratory scale membrane rig. The results were used to validate the use of the ROSA simulation package. ROSA simulation was conducted with liquid waste having a range of salinity of up to 100,000 ppm of total dissolved solid (TDS). Results reported here indicated that RO membranes were highly suitable for …