INVESTIGATION OF ADMIXTURE SEDIMENTATION IN THE HORIZONTAL SETTLER
Journal Title: Наука та прогрес транспорту - Year 2016, Vol 0, Issue 4
Abstract
Purpose.Sedimentation by gravity is the most common and extensively applied treatment process for the removal of solids from water and wastewater and it has been used for over one hundred years. Sedimentation tanks are one of the major parts of a treatment plant especially in purification of turbid flows. Horizontal settlers are mainly used for purification of high quantity of water. In these tanks, the low speed turbid water will flow through the length of the tank and suspended particle have enough time to settle. Finding new and useful methods for calculating and increasing hydraulic efficiency of horizontal settlers is the objective of many theoretical, experimental and numerical studies.But currently used models and methods in Ukraine do not allow taking into account geometrical form and various design features. In this paper the numerical model was developed to evaluate the effectiveness of horizontal settler with modified structure. Methodology. Numerical model is based on: 1) equation of viscous fluid dynamics; 2) mass transfer equation. For numerical simulation the finite difference schemes are used. The numerical calculation is carried out on a rectangular grid. For the formation of the computational domain markers are used. Findings.The model allows obtaining the purification process in the settler with different form and different configuration of baffles. Originality. A new approach to investigate the mass transfer process in horizontal settler was proposed. This approach is based on the developed CFD model. The fluid dynamics model was used for the numerical investigation of flows and waste waters purification. To investigate influence of baffles on settler efficiency physical experiment was carried out. Practical value.The developed model has more capacity than the existing models in Ukraine. The developed model allows computing quickly the efficiency of water purification in settlers. The model is not computationally expensive. Calculation time of one variant of the problem takes few minutes.
Authors and Affiliations
V. A. Kozachyna
Keywords
Related Articles
- EP ID EP225313
- DOI 10.15802/stp2016/77827
- Views 118
- Downloads 0
THE SUBGRADE HETEROGENEITY CONSIDERATION OF A RAILWAY TRACK WHEN DETERMINING ITS STRESS-STRAIN STATE
Purpose. Increase of the speed and train carrying capacity causes the increase in the load on the railway track and, in turn, loads on the subgrade. This makes it necessary to clarify the calculation methods, both the up...
INVESTIGATION OF ADMIXTURE SEDIMENTATION IN THE HORIZONTAL SETTLER
Purpose.Sedimentation by gravity is the most common and extensively applied treatment process for the removal of solids from water and wastewater and it has been used for over one hundred years. Sedimentation tanks are o...
ПРОГНОЗУВАННЯ ОБСЯГУ МЕРЕЖЕВОГО ТРАФІКА В ІНФОРМАЦІЙНО-ТЕЛЕКОМУНІКАЦІЙНІЙ СИСТЕМІ ПРИДНІПРОВСЬКОЇ ЗАЛІЗНИЦІ НА ОСНОВІ НЕЙРОНЕЧІТКОЇ МЕРЕЖІ
Мета. Постійне збільшення обсягу мережного трафіка в інформаційно-телекомунікаційній системі (ІТС) Придніпровської залізниці призводить до необхідності визначення в реальному часі перевантаження в мережі та здійснення ко...
ANTI-TERROR ENGINEERING IN THE CASE OF POSSIBLE TERRORIST ATTACKS WITH CHEMICAL AGENTS
Purpose. This work aims to develop a method of local outdoor reduction of the concentration of a chemically hazardous substance, which entered the atmosphere through a cafe roof vent. It also involves the creation of a n...
ПОВТОРЮВАНІ ЗВ’ЯЗКИ У СХЕМАХ СТРИЖНЬОВОГО ПОВЗУННО-ШАТУННОГО МЕХАНІЗМУ ЗАХОПЛЮВАЛЬНОГО ПРИСТРОЮ
Мета. Робота має за мету провести структурний аналіз захоплювального пристрою, який є механізмом змінної структури із зовнішніми неутримуючими зв’язками. Також потрібно визначити кількість повторюваних зв’язків у внутріш...