Feb 26, 2016

Feb 26, 2016

Feb 26, 2016

- Apr 28, 2017

## 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.
- Apr 28, 2017

## Types of Grit Chambers in Waste Water Treatment

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
- Apr 28, 2017

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
- Apr 27, 2017

## Types of Screens in Waste Water Treatment Plants

Screens can be classified on the basis of following criteria: Opening size: Coarse, Medium, Fine Cleaning Method: Manual, Mechanical, Raked, Water jet
- Apr 27, 2017

## 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.
- Apr 26, 2017

## Design procedure for sanitary sewers

Calculate the average wastewater flow, Qavg = (70-80) % of average water consumption. Select a peak factor, PF = [(18+√P)/(4+√P)], where P = population in thousands. Calculate the peak wastewater flow, Qpeak = (PF * Qavg)
- Apr 21, 2017

## To Measure COD of WasteWater using Open Reflux Method

KMn04 was used as oxidizing agent for many time pb with KMno4 was that different value of COD obtained due to strength change of KMno4. BOD value obtained greater than COD with KMno4 means KMno4 was not oxidizing all the substances.
- Mar 24, 2017

## Municipal Wastewater Treatment Systems

Collection of domestic wastewater is best achieved by a full sewerage water drain age system. Unfortunately this method is most expensive and there is relatively few communities in hot climate which afford it. A modern hygienic method of night soil collection is the only realistic alternative. Treatment is required principally to destroy pathogenic agents in sewage or night
- Mar 24, 2017

## Preliminary Treatment of Waste Water

The first unit operation generally encountered in wastewater treatment plants is screening. A screen is a device with openings, generally of uniform size, that is used to retain solids found in the influent wastewater to the treatment pant. The principal role of screening is to remove coarse materials (pieces of wood, plastics, rags, papers, leaves, roots etc.) from the
- Mar 23, 2017

## Types of Primary Sedimentation Tanks

Some removal is essential in primary sedimentation tanks because of the grease and other floating matter which is present in wastewater. The sludge serapes can return along the length of the tank a the water surface. As they move towards the outlet end of the bank, the flights then move the sum towards a skimmer located just upstream of the effluent weirs.
- Mar 23, 2017

## Secondary Biological Wastewater Treatment Process

The main objective of secondary treatment: To remove most of the fine suspended and dissolved degradable organic matter that remains after primary treatment, so that the effluent may be rendered suitable for discharge. Conventional secondary treatment can reduce the BOD's
- Mar 23, 2017

## Activated Sludge Process Design

The activated sludge form the underflow of the final setting tanks should be returned to the inlet of the aeration tanks at a rote sufficient to maintain the MLSS concentration at the design value. Excess activated sludge withdrawal system and subsequent treatment and disposal of waste sludge. Since the whole process takes place in a liquid medium the hydraulic
- Mar 23, 2017

## Bacterial Classification in Wastewater Treatment

Microorganisms are significant in water and wastewater because of their roles in different transmission and they are the primary agents of biological treatment. They are the most divers group of living organisms on earth and occupy important place in the ecosystem. Are called OMNIPRESENT. Classification of bacteria based on Oxygen requirements (ORP)
- Mar 20, 2017

## Measure COD of WasteWater Using Closed Reflux Method

Place Approximately 500ml Of Sample In a clean blender bowl and homogenizze at high speed for two minutes. blending the sample ensures a auniforum distribution of suspended solids and thus improves the accuracy of test results. Holding the vial by the cap