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Feb 26, 2016 / Haseeb Jamal -

5 Travel Myths You Need to Stop Believing Right Now

Feb 26, 2016 / Haseeb Jamal -

Canal Comes Alive with Lighted Boat Parade.

Types of Traffic Models

Microsimulation models track individual vehicle movements on a second or sub second basis. Microsimulation relies on random numbers to generate vehicles, select routing decisions, and determine behavior. Because of this variation, it is necessary to run the model several times with different random number seeds to obtain the desired accuracy. There will be a

Chemical Characteristics of Sewage - BOD, COD, Nutrients, DO

In sanitary sewage about 75 % of suspended solids and 40% of filterable solids are organic. These solids are derived from both animals, plant and humans. Organic compounds usually consist of C; H; O; N along with S; P and Iron. The organic substances found in sewage are Protein (40-60%); Carbohydrates (25-50%), fats and oils (10%). Along with these organic

Physical Characteristics of Sewage

Following are the detailed physical characteristics of Sewage: Temperature, Color, Odor, Solids, Total Solids, Total suspended Solids, Fixed and Volatile Solids. Oxygen is less soluble in warm water, while some species of aquatic life population increases with temperature causing more demand of oxygen and result in depletion of dissolved oxygen in summer.

Types of Grit Chambers

Check the SLR (1200-1700 m3/m2-day) and Vs (≥ 0.01 m/sec). Grit produced is about 1.5 ft3/ML of wastewater flow. Add to depth {1ft FB + grit}... Assume a depth (D = 08-15 ft), determine the surface area of the basin. And check the SLR (1200-1700 m3/m2-day)... The amount of grit produced is about 1.5 ft3/ML of wastewater flow. Add suitable depth from

Advantages & Disadvantages of Comminutors

Elimination of extra steps and problems involved in the excavation of the disposals of screening (screened material) Often difficult to dispose highly polluted screenings - In USA if buried, 6 inches of cover material should be used

Definitions in Waste Water Treatment

It is the measure of the settleability and compatibility of sludge and is made from a laboratory column setting test. The sludge volume index is defined as ‘the volume in mm occupied by 1 gm of sludge after it has settled for a specified period of time’ generally ranging from 20 min to 1 or 2 hr in a 1 – or 2-l cylinder.

What is the Composition of Wastewater?

A typical solids analysis of wastewater, of the total solids, 50% is dissolved, 50% suspended. Of the suspended solids, 50% will settle. Industrial activity changes the composition of wastewater, often introducing toxic substances such as chromium and cadmium from plating operations. The typical composition of wastewater based on strength. The important characteristics

Food to Microorganisms Ratio (F/M)

A parameter of organic loading rate in the design aerated sludge parameter in the design of Trickling Filter in organic loading rate = kg of BOD / m3-d

Deterioration of Concrete and Remedial Measures

Calcium silicates can be used to fill the pores and decrease the permeability. This can be done by treating calcium hydroxide with diluted sodium silicate (also known as Water-Glass). Pores can also be filled by treating Calcium Hydroxide with Magnesium Fluosilicate followed by the formation of Colloidal Silicofluoric Gel to withstand acid attack. Allowing the

Design and Selection of GeoTextiles

After a detailed study of research carried out here and in Europe on both conventional and geotextile filters, developed a widely used design procedure for geotextile filters for drainage and permanent erosion-control applications. The level of design required depends on the critical nature of the project and the severity of the hydraulic and soil conditions. Especially

What is Phototheodolite

A photo theodolite is a form of ground camera. It is a combination of camera and theodolite ans is used of taking photographic and measuring the angles which the rival plane of collimation makes with base line. The optical axis of the camera is arrange parallel to the line of collimation of the chocolate telescope and the theologize allows The determination of the orientation

What is Trilateration Surveying

Because of the development of highly accurate electronic measuring devices, a triangulation system can be completely observed, computed and adjusted by measuring the lengths o the sides in the network.

Applications of Triangulation

The establishment of accurately located control points for surveys of large. The accurate location of indirection work such as: Centre lines, terminal pts shafts for long tunnels

Compound Curves in Engineering Survey

Combination of two or more simple circular curves of different radius having their curvature in the same direction. Essentially, a compound curve consists of two curves that are joined at a point of tangency and are located on the same side of a common tangent. Though their radii are in the same direction, they are of different values. tr= perception/reaction time

Errors and Corrections of Errors in Levelling

Collimation error occurs when the collimation axis is not truly horizontal when the instrument is level. The effect is illustrated in the sketch below, where the collimation axis is tilted with respect to the horizontal by an angle a:

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