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Dissolved organic matter (DOM) in the biotreated effluent of a municipal wastewater treatment plant was separated by XAD-8 and XAD-4 resins into four fractions: hydrophobic acids, non-acid hydrophobics, transphilics and hydrophilics. Ozonation with and without ultraviolet (UV) enhancement removed most UV-absorbing substances in the first 30 min achieving(More)
GAC/O3 (ozonation in the presence of granular activated carbon) combined with enhanced coagulation was employed to process biotreated textile wastewater for possible reuse. The doses of ozone, GAC and coagulant were the variables studied for optimization. The effects of different treatment processes on effluent organic matter (EfOM) characteristics,(More)
Laser range finder is one of the effective and automatic methods for distance measurement, making distance measurement much easier and safer in the places where people can't reach. Laser range finder helps to measure the distance accurately by finding the difference of phase which brings by modulated wave through the distance. Through the analysis of(More)
The cell-free PVA gel membrane and cell-containing PVA gel membrane were prepared by iterative freezing and thawing, and the diffusion coefficients of ammonia, nitrate and nitrite in PVA gel membranes were determined. The effect of the conditions of preparing PVA gel membranes and cell concentration on the diffusion coefficients of ammonia in PVA gel(More)
In this paper, we study the number of isolated zeros of Abelian integrals associated to system ̇ x = y, ̇ y = −x 3 (x 2 − 1) 2 under the perturbations of (α0 + α1 x 2 + α2 x 4 + α3 x 6 ) y ∂ ∂y , where 0 < | | 1 and αi ∈ R ( i = 0 , 1 , 2 , 3 ). We find a special transformation such that four generating elements are reduced to special three ones and then(More)
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