the results of batch settling tests (bst) are used to investigate settling behavior of solids suspension, which contribute to sizing thickeners. conventional methods in analyzing bst on the basis of visual and graphical procedures lead to sub-optimally sized and selected thickeners. a computational approach based on quantitative analysis of bst can be beneficial. about 300 settling experiments ...

Strategies are sought to reduce the impact of nonpoint sources of pollution, including fecal bacteria, and meet TMDL criteria. Vegetative filter strips (VFSs) are one such strategy. VFSs were found to be effective in removing abroad range of constituents from beef feedlot runoff pretreated by a settling basin. The first 30 m provided most or all of the reductions found within the 150-m VFSs stu...

Long-term sedimentation of pumped storage reservoirs due to the alternation of turbine and pumping modes is an issue regarding sustainability and reliability of such schemes. Systematic experiments on a cuboidal basin are conducted to study how flow fields, turbulence and settling down of fine sediments are affected by discharge, duration of pumped storage sequences, sediment concentration and ...

A new protocol similar to EPA method TO-14A was established to quantify and report variations in greenhouse gas (GHG) emissions from different ground level area sources (GLAS) in a free-stall dairy in central Texas. The objective of the study was to estimate and compare methane (CH4), carbon dioxide (CO2), and nitrous oxide (N2O) emission factors (EFs) from different GLAS using this new protoco...

A laboratory study of the Cannibal process was undertaken to determine if the Cannibal system would generate less sludge compared with a conventional activated sludge system. Side-by-side sequencing batch reactors were operated--one using the Cannibal configuration and the other as conventional activated sludge. It was found that the Cannibal process generated 60% less solids than the conventio...

The Sanshui Basin is located at the northern continental margin of South China Sea and characterized by a rift basin. bimodal volcanic rocks in record early Cenozoic magmatic activity Block, but evolution that produced poorly understood. Clinopyroxenes provide an opportunity to investigate magma during ascent. In this work, we classified nine types clinopyroxene phenocrysts according compositio...

In the past years, lamella settlers have been used as devices for treatment by sedimentation also for storm water. Instead of just equipping a sedimentation basin with numerous lamella modules, an innovative approach for traditional separate systems is proposed. Basically, storm water is stored in a basin or tank during a rain event, while treatment is done in a small but continuously operated ...

We investigated the genetic structure of early benthic juveniles of the spiny lobster Palinurus elephas in the northwest Mediterranean Sea by means of ten polymorphic microsatellite markers. Non-metric Multidimensional Scaling coupled with assignment tests were used as a new approach to further delimit a reference population inside a genetically homogeneous pool of individuals and test for the ...

The northern continental slope of the Gulf of Mexico is riddled with numerous subsiding diapiric minibasins bounded by ridges, many but not all of which are connected by channels created by turbidity currents. The region is economically relevant in that many of these diapiric minibasins constitute focal points for the deposition of sand. Some of these sandy deposits in turn serve as excellent r...

I would like to thank my graduation committee for their supervision, advice and support. I would also like to thank prof.dr.ir. L.C. van Rijn and dr.ir. J.C. Winterwerp for their valuable advices and dr.ir. M. van Koningsveld for providing the frame work of the model and for his comments and suggestions. Further I would like to thank my colleagues from the environmental department of Van Oord f...