Aeration Process In Water Treatment

Aeration brings water and air in close contact by exposing drops or thin sheets of water to the air or by introducing small bubbles of air the smaller the bubble the better and letting them rise through the water.

Aeration process in water treatment. In industrial processes water flow is usually directed countercurrent to atmospheric or forced draft air flow. One negative effect of nutrient enriched wastewater is the development of harmful algal blooms or dead zones in major bodies of water. The bacteria in the wastewater break down the organic matter containing carbon to form carbon dioxide and water utilizing the supplied oxygen. The water treatment process includes many operations like screening aeration and sedimentation sedimentation with coagulation softening filtration disinfection etc.

Water treatment aeration many water treatment processes use a variety of forms of aeration to support biological oxidative processes. The aeration process may be considered a major part of total energy demand and operational costs. Turbulence increases the aeration of flowing streams. The contact time and the ratio of air to water must be sufficient for effective removal of the unwanted gas.

Aeration treatment consists of passing large amounts of air through water and then venting the air outside. The bacteria in the water require oxygen for the biodegradation process to occur. The air and the contaminants released from the water are vented. Aeration in an activated sludge process is based on pumping air into a tank which promotes the microbial growth in the wastewater.

Aeration provides oxygen to bacteria for treating and stabilizing the wastewater. The scrubbing process caused by the turbulence of aeration physically. The activated sludge process is the most common option in secondary treatment. Aeration is an important step in the process of treating wastewater including sewage effluent.

Methods of the water treatment process are explained below. The water treatment process generally adopted depends upon the quality of raw water and quality of water derived. The energy consumption of aeration in mbrs in a normal wastewater treatment plant is about 0 4 kwh m3 effluent whereas in casps it is in the range of 0 25 0 40 kwh m 3 krause 2005. The removal of nutrients is critical because wastewater that is overly rich in nutrients can cause ecosystem imbalances if released into the environment.

Aeration in water treatment is a must have process for the water bodies suffering from anaerobic conditions that are often caused by human activities such as excessive fishing done in the lake or sewage discharges. A typical example is activated sludge which can use fine or coarse bubble aeration or mechanical aeration cones which draw up mixed liquor from the base of a treatment tank and eject it through the air where oxygen is entrained in the liquor. Aeration constituents are removed or modified bee with the treatment fore they can interfer processes. The air causes the dissolved gases or volatile compounds to release from the water.

Microorganisms in aeration wastewater treatment tanks break down organic compounds and nutrients. Aeration is a unit process in which air and water are brought into intimate contact. In municipal and industrial wastewater treatment aeration is part of the stage known as the secondary treatment process. After settling in a separate settling tank bacteria forming the.