Various half-scale and lab-scale investigations have already shown that the disintegration of excess sludge is a possible pre-treatment to optimise anaerobic digestion. To verify these results, different methods of disintegration were investigated at a full-scale plant. Two stirred ball mills, a plant for oxidation with ozone, a lysate centrifuge and an ultrasonic homogeniser were applied. A po...

In this project the efforts were geared towards building and testing a high aspect ratio (HAR) microfluidic device to concentrate microalgae in a continuous flow microfluidic chip. This project was made possible through funding from USDA, SBIR phase-I grant to Phycal, Inc. Algae are a promising candidate for large-scale production of biofuels, an important source of renewable energy. However, a...

Thickening is the first step in the design of sustainable (cost effective, environmentally friendly, and socially viable) tailings management solutions for surface deposition, mine backfilling, and sub-aqueous discharge. The high water content slurries are converted to materials with superior dewatering properties by adding long-chain synthetic polymers. Given the solid and liquid composition o...

This paper proposes a new method for predicting the displacement and internal force of constructed tunnels induced by adjacent excavation with dewatering. In this method, total excavation-induced additional stress on tunnel is derived superposing stresses unloading dewatering effects. The effect calculated using Mindlin’s solution. principle effective Dupuit precipitation funnel curve. With bea...

Abstract A two‐step process, with anionic hydrolyzed polyacrylamide (HPAM) and cationic poly(vinylbenzyl trimethylammonium chloride) (PVBTMAC), was used to flocculate oil sands mature fine tailings (MFT). The charge density of HPAM the dosages PVBTMAC were varied maximize dewatering MFT minimize turbidity supernatant. dual flocculant system performed better at lower doses than when alone. best ...

A preliminary study, which establishes the treatment methodology of liquid waste containing sludge and uranium in the lagoon of the conversion facility has been performed. Properties of the liquid waste such as initial water content, density and radiochemical composition were obtained by analyzing the samples taken from the lagoon. In order to minimize the secondary waste resulting from treatme...

A significant nutrient load can be generated internally by publicly owned treatment works (POTWs). These nutrients can be found in the reject water, also known as side streams, of many municipal wastewater and sewage sludge treatment processes. These side streams include the reject stream from membranes, supernatant liquid from sludge digesters, and the centrate/filtrate return stream from sewa...