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Browsing by Author "Aryal Rupak"

Now showing items 1-20 of 28

Application of Ultraviolet (UV) Spectrophotometry in the Assessment of Membrane Bioreactor Performance for Monitoring Water and Wastewater Treatment

Aryal Rupak; Vigneswaran Saravanamuth; Kandasamy Jaya (Society for Applied Spectroscopy, 2011)

Ultraviolet (UV) spectroscopy has been widely used in monitoring water and wastewater treatment. In this study UV spectroscopy was used to investigate fouling development on the membrane surface of membrane bioreactors. ...
Assessment of water treatment processes: detailed organic matter characterisation and membrane fouling indices at the Loddon Water Treatment Plant, Victoria, Australia

Chinu Khorshed; Vigneswaran Saravanamuth; Kandasamy Jaya; Aryal Rupak; Dharmapalan D (IWA Publishing, 2011)

Recent advances in membrane technology have led to its broad application, and reverse osmosis (RO) systems now represent the fastest growing segment of the desalination market. Its performance is hindered by membrane ...
Characteristics of particle-associated PAHs in a first flush of a highway runoff

Aryal Rupak; Furumai H; Nakajima F; Boller M (IWA Publishing, 2005)

Runoff monitoring of six rainfall events was carried out in a highway, Winterthur, Switzerland focusing on first flush (runoff volume up to 2.88 mm). Six runoff events were used to investigate the characteristics of ...
Characteristics of Suspended Solids and Micropollutants in First-Flush Highway Runoff

Aryal Rupak; Lee Byeong-Kyu (Springer Netherlands, 2009)

Suspended solids (SS) in the first-flush runoff on highway was monitored in six continuous events from October to December 2000 in Winterthur, Switzerland, and some characteristics of particle-bound micropollutants such ...
Dynamic behaviour of fractional suspended solids and particle-bound polycyclic aromatic hydrocarbons in highway runoff

Aryal Rupak; Furumai H; Nakajima F; Boller M (Pergamon, 2005)

A long-term continuous runoff monitoring was carried out in a highway in Winterthur, Switzerland. The total suspended solids (TSS) samples were fractionated into fine (<45 ?m) and coarse (>45 ?m) fraction and their washoff ...
Dynamics of PM2.5 concentrations in Kathmandu valley

Aryal Rupak; Lee B; Karki Rahul; Gurung Anup; Baral B; Byeon S (Elsevier Science Bv, 2009)

This study analysed daily patterns and dynamics of PM2.5 concentrations in the Kathmandu Valley during three winters. The PM2.5 data showed a daily repetitive cycle which represents influence of local air flow and dispersion ...
Effect of different flocculants on short-term performance of submerged membrane bioreactor

Guo Wenshan; Ngo Huu Hao; Vigneswaran Saravanamuth; Dharmawan Fonny; Nguyen Tien; Aryal Rupak (Elsevier Inc, 2009)

This study aims at evaluating the impacts of flocculant addition to a submerged membrane bioreactor (SMBR). Three types of common flocculants (FeCl3, PACl and chitosan) were tested based on the performance of organic and ...
Heavy metals speciation in sediment accumulation within infiltration facility and evaluation of metal retention properties of underlying soil

Hossain M A; Furumai H; Nakajima F; Aryal Rupak (IWA Publishing, 2007)

Heavy metals speciation analysis was carried out on sediment samples accumulated within soakaways in an old stormwater infiltration facility in Tokyo, Japan and on a soil core sample collected near the facility. Heavy ...
Hydrous iron oxide for removal of inorganic contaminants in simulated stormwater: A batch sorption kinetics study

Aryal Rupak; Vigneswaran Saravanamuth; Loganathan Paripurnanda; Kandasamy Jaya; Mohammed Thamer (Springer New York LLC, 2011)

Urban stormwater runoff, which consists of inorganic and organic contaminants, is a major source of pollutants to receiving waters and therefore they need to be removed. Simultaneous removal of contaminants, Cd2+, Cu2+, ...
Identification and characterisation of biofilm formed in membrane bioreactor

Aryal Rupak; Legegue J; Vigneswaran Saravanamuth; Kandasamy Jaya; Heran M; Grasmick Alain (Elsevier Inc, 2009)

Experiments were conducted in a laboratory scale membrane bio-reactor (MBR) system equipped with a side stream flat sheet membrane. Six runs lasting different durations (2, 4, 6, 9, 15 and 20 days) were conducted at an ...
Identification and quantification of foulant in submerged membrane reactor

Lebegue J; Aryal Rupak; Shon Ho Kyong; Vigneswaran Saravanamuth; Heran M; Grasmick Alain (Desalination Publications, 2010)

In submerged membrane system, membrane fouling is linked to the reversible accumulation of macromolecules and solids on the membrane surface and the irreversible sorption of soluble molecules inside the pores. In the first ...
Influence of aeration and permeate flux on deposition of particulates on membrane surface

Aryal Rupak; Vigneswaran Saravanamuth; Kandasamy Jaya; Baral B; Grasmick Alain (IWA, 2010)

In microfiltration, a deposit of foulant tends to form on the membrane surface and this usually controls the performance of the filtration process. This paper discusses the influence of physical parameters such as aeration ...
Influence of buoyant media on particle layer dynamics in microfiltration membranes

Aryal Rupak; Vigneswaran Saravanamuth; Kandasamy Jaya (IWA Publishing, 2010)

This study forms a part of the physical study of the membrane bioreactor in presence of buoyancy media. Kaolin clay suspension with buoyancy media (anthracite) was used as a suspension and the particle layer development ...
Influence of hydraulic retention time on the nature of foulant organics in a high rate membrane bioreactor

Hong Shan; Aryal Rupak; Vigneswaran Saravanamuth; Johir Md Abu; Kandasamy Jaya (Elsevier BV, 2012)

The influence of hydraulic retention time (HRT) in a submerged hollow fibre membrane bioreactor was studied by conducting experiments at four different HRTs (4,2, 1.3 and 1 h) at room temperature of 25 Â°C. lt was found ...
Influence Of Supporting Media In Suspension On Membrane Fouling Reduction In Submerged Membrane Bioreactor (Smbr)

Johir Md Abu; Aryal Rupak; Vigneswaran Saravanamuth; Kandasamy Jaya; Grasmick Alain (Elsevier Science Bv, 2011)

In this study, the SMBR was compared in terms of membrane fouling with and without the addition of suspended medium in the membrane reactor. The effectiveness of medium in suspension in submerged membrane bioreactor (SMBR) ...
A long-term suspended solids runoff simulation in a highway drainage system

Aryal Rupak; Jinadasa Hkpk; Furumai H; Nakajima F (IWA Publishing, 2005)

A long-term monitoring investigation was carried out in a highway drainage system in Winterthur, Switzerland. Several runoff quality and quantity simulations were carried out using the distributed model "InfoWorks-CS". ...
Model description of storage and infiltration functions of infiltration facilities for urban runoff analysis by a distributed model

Furumai H; Jinadasa Hkpk; Murakami M; Nakajima F; Aryal Rupak (IWA Publishing, 2005)

Although there have been simulation researches focusing on reduction of stormwater peak flow by introduced infiltration facilities, model simulation of dynamic runoff behavior is still limited for frequently occurring ...
Prolonged deposition of heavy metals in infiltration facilities and its possible threat to groundwater contamination

Aryal Rupak; Furumai H; Nakajima F; Murakami M; Jinadasa Hkpk (IWA Publishing, 2006)

A field investigation of infiltration facilities, built two decades ago in Tokyo, was carried out and sediment samples were collected from 12 infiltration inlets of three different locations. Heavy metals contents in the ...
Review of Stormwater quality, Quantity and Treatment Methods Part 1

Aryal Rupak; Kandasamy Jaya; Vigneswaran Saravanamuth; Naidu Ravi; Lee S (Korean Society of Environmental Engineers, 2009)

A review of stormwater quantity and quality in the urban environment is presented. The review is presented in three parts. The first part reviews the mathematical methods for stormwater quantity and has been undertaken by ...
Review of Stormwater Quality, Quantity and Treatment Methods Part 2: Stormwater: Quality Modelling

Aryal Rupak; Kandasamy Jaya; Vigneswaran Saravanamuth; Naidu Ravi; Lee Seung-Hwan (Korean Society of Environmental Engineers, 2009)

In this paper, review of stormwater quality and quantity in the urban environment is presented. The review is presented in three parts. This second part reviews the mathematical techniques used in stormwater quality modelling ...

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Browsing by Author "Aryal Rupak"

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Browsing by Author "Aryal Rupak"