The long-term physical and chemical effects of using coal-combustion residues (CCRs), in particular fixated flue gas desulfurisation (FGD) sludge, have been monitored as a major component in the reclamation of a pyritic refuse deposit. This was undertaken to determine the consequences of placing these controversial materials in an unrestricted environment.
17 May 2012
Dissolved organic carbon is examined in streams with varying anthropogenic influences, using a technique to determine organic quality with and without upstream wastewater treatment plant inputs. Effluent-derived organics can persist for a long way downstream of discharge points.
15 May 2012
This study reviews the literature on the uptake of radiocations on titanosilicate materials, in particular the influence of physicochemical parameters on uptake. The use of titanosilicates is found to be beneficial as cleaning agents for radioactive effluents.
14 May 2012
This study uses historical data from more than 100 years to predict the future replacement needs for drinking water distribution networks. The historical data provide a reliable prediction, and the data fit well with commonly used lifetime distribution curves.
10 May 2012
This paper reviews changes in water quality, with all its consequences, during selected recent extreme hydrological situations in the Czech Republic.
09 May 2012
This paper targets improved management of water bodies for preserving water quality through nitrate source determination. The use of stable isotope and chemical markers is considered, to differentiate between nitrate sources to surface waters. Chemical markers are also assessed to differentiate sewage and manure nitrate inputs.
02 May 2012
In the mining industry, production is directly related to the plant’s total pumping capacity, and reclaim systems are the main source of water. With the pressure on to improve processes, Petar Ostojic from Neptuno Pumps discusses how pump manufacturers can help mining companies re-power their reclaim water systems with custom engineering solutions, improving pump capacity and reducing energy consumption.
01 May 2012
Members' Content
This work analyses the optimal plant operation of brackish water reverse osmosis (BWRO) desalination, to reduce the specific energy consumption. Model-based optimisation was developed to guide RO operation, with the modelling results validated by plant data.
30 April 2012
This review article summarises recent developments in novel engineering systems for the detection of Cryptosporidium in drinking water.
27 April 2012
The pharmaceutical and biotechnical industries need increasing volumes of very clean water. The requirement for high purity media systems, is rising accordingly, but water generation quality fluctuations or supply bottlenecks can have far-reaching production line consequences. Bosch's Helmut Sommer reports.
24 April 2012
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Maintenance of submersible pumps is complex due to the depth at which they are installed, which makes access difficult. Correct facility design to extend the time between failures and the monitoring of several parameters to determine the pumps’ performance during operation are therefore vital factors, as Miguel Ortiz from FACSA and Alejandro Palomo from Salinas y Perez report.
17 April 2012
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An infiltration tracer experiment has been used to investigate contaminant transport from the surface to wells drilled into bedrock. The surface-applied tracer reached the pumped wells quickly, in just hours. Thus infiltration tracer experiments can provide valuable information on contaminant transport.
12 April 2012
When the fountains in the Trocadero Gardens near the Eiffel Tower in Paris needed extensive renovation work, it was not only a question of what equipment to choose but also how to get it through very restricted access routes. KSB's solution was to dismantle and then rebuild the machines powering the fountains in situ.
10 April 2012
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A vibratory shear enhanced process (VSEP) has been used to treat concentrate from a spiral wound reverse osmosis (RO) system, to enhance feed water recovery. The high shear rate restricted the deposition of nanocolloidal silica on the VSEP membrane, but it was found that barium sulphate precipitation limited the performance of the VSEP system.
10 April 2012
The modern opportunities of forward osmosis are considered, with five key challenges faced by FO systematically reviewed and discussed. These are concentration polarisation, membrane fouling, reverse solute diffusion, and the need for new membrane development and draw solute design in FO. The intrinsic relationships between these five challenges are explored.
04 April 2012
World Pumps takes a look at the key themes covered by German water and sewage trade fair IFAT which in 2012 promises to be the biggest ever.
03 April 2012
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This special issue of Water Research comprises a collection of papers addressing the potential impact of climate change on cyanobacteria, and the resulting effects on drinking water quality and supply.
03 April 2012
Performance data for a solar membrane distillation desalination plant in Gran Canaria, Spain have been analysed for a five-year period. There is a direct correlation between solar radiation and the feed and distillate volume. This technology is suitable for small supplies, isolated populations, and autonomous systems.
30 March 2012
The removal of pharmaceuticals and personal care products (PPCPs) and other micropollutants from treated wastewater has been compared using reverse osmosis and ozonation. Ozone/biofiltration and RO are comparable for micropollutant removal, but ozonation is better than RO in terms of energy consumption, water recovery, and waste production.
29 March 2012
Multiphase simulation can improve performance of oil and gas separation equipment. David Stanbridge of the Swift Technology Group explains.
22 March 2012
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