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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 Settling in Waste Water Treatment Plants

Discrete, non-flocculent particles in a dilute suspension - settle as separate units, and there is no apparent flocculation or interaction between the particles - settling of sand particles in grit chambers. Settling of flocculent particles in a dilute suspension - flocculate during settling and increase in size and settle at a faster velocity - settling in primary

Factors Affecting Site Selection for Waste Water Treatment Systems

The planning design engineer, when selecting sites for recreational treatment facilities, must ensure that the planned facility will not cause interference or detractions from the natural, scenic, aesthetic, scientific, or historical value of the area. In addition, topographic, geological, hydrogeologic, and atmospheric factors and conditions must be considered

Sanitary & Environmental Science Engineering Definitions

Sanitary engineering is the application of scientific or mathematical principles with to the field of sanitation, especially in regards to its effect on public health. Sanitation is the hygienic means of preventing human contact from the hazards of wastes to promote health. Wastewater is any water that has been adversely affected in quality by anthropogenic influence. It

Purpose and Methods of Treatment of Waste Water

The prehistoric and the Old civilization established themselves near water sources. While the importance of water quantity for drinking purposes was apparent to our ancestors treatment processes was not well known. Water treatment originally focused on improving the aesthetic and Sight qualities of drinking. Ancient Sanskrit & Ancient Greek writings

Types of WasteWater Treatment Ponds

Based upon the range of biological reactions occurring in pounds there are three types of ponds. Aerobic (high-rate) pond in which there is no significant anaerobic or sludge zone. Anaerobic ponds, in which the contribution of any possible aerobic surface layer is small. Oxidation ponds (so called facultative or aerobic anaerobic pond in which have the whole range of reaction

Definition of various Waste Water flow rates

Qavg is the daily average flow based on yearly data.. Normally, the treatment units are designed on the basis of daily average flow while peak and minimum flows are used to check the capacities of basin and conduits in extreme flow condition. Mass Loading Factor takes care for the fluctuation in wastewater flows and the respective characteristics loading parameters.

Design of Screening Devices and Its Types

Located at the intakes from river, lakes & reservoirs for water treatment plant or at wet well into which main trunk sewer discharge for waste water treatment plant. They are also located before the pumps in storm water & waste water pumping plant. In case of industrial waste water treatment there is usually no need of such equipment. These devises remove the coarse

Reactors of Waste Water Treatment

Units are the vessels or basin that holds wastewater for the treatment by chemical or biological processes. They can be of any shape. Depending upon the flow and operating conditions and the methods of mixing of the wastewater therein, the reactors have the following main types; Continuous-Flow Stirred Tank Reactor (CFSTR) or Completely-Mix Reactor:

Quality of Sewage - Chemical, Physical and Biological Characteristics

The physical characteristics of wastewater include those items that can be detected using the physical senses. They are temperature, color, odor, and solids. Sewage contains both organic and inorganic chemicals in addition to various gases like H2S, CO2, CH4, and NH3 etc that are formed due to the decomposition of sewage. The chemical characteristics of wastewater of

Methods of Disinfection of Water

In the water treatment processes, pathogens & other organisms can be partly physically eliminated through coagulation, flocculation, sedimentation, & filtration, in addition to the natural die-off. After filtration, to ensure pathogen free water, the chemical addition of chlorine (so called chlorination), rightly or wrongly, is most widely used for disinfection of drinking water

Why Urban Drainage Systems are necessary

Urban drainage systems are needed in an area because of interaction between human activity and natural water cycle. This interaction has two main forms; The abstraction of water from the natural cycle to provide water supply for human life; Covering of land with impermeable surfaces that divert rainwater away from the local natural system of drainage. If untreated

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

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