Stages of Waste Water Treatment Process.
Both domestic and industrial processes leads to variety of waste including solids, water and gases. The wastes are absorbed into the environment and cab harmful, The harm made to the environment can, however, be reduced by taking waste through treatment plants. The end products of the waste treatment plants includes clean water, harmless biodegradable and recycled products The processes involved in the treatment of these wastes differs depending on the source and the type of waste. Wastewater is common in most process including in homes and industries. There are different stages of the wastewater treatment process.
Wastewater from homes is normally treated in septic systems. Though the septic system is simple, it should always remain functional. However, septic systems serving large populations are complex since they have to absorb lots of waste. Large water treatment plants for use in large factories and high residential areas are however available. There are manufacturers of wastewater treatment plants and can help with the design and construction of wastewater treatment plant. They will design the plan according to the project specific needs. Engineers at the manufacturers will oversee the project from its design stage to monitoring and maintenance works. These systems are complex and require large capital outlay. The water released from these systems are quality clean and therefore used at commercial levels.
There are three main stages in the water treatment process. Water flows to reservoirs either by pumping or gravitational force. In the reservoirs, there is separation of floating and suspending solids from the water. The process involves use of centrifugal force. The stage removes about 60% of the suspended solids. Chemicals can be used at times to increase the removal of solids. The water is then directed to the second phase also known as secondary stage or organic stage. In the second stage, the remaining biodegradable and suspending articles are given as food to organism such as fish. The organism in the water eat the food particles in the water remove the phosphate and nitrates nutrients in the water. More than 80% of impurities in the water are removed at this stage. The water that is released into the environment at this stage is not harmful.
The third stage is however introduced to make the water pure. This phase is known as tertiary level, and the water released here can be used for different purposes. There is application of different water treatment chemicals to make it safe. Chlorine is used to purify the water though it has been disputed in the recent times.
Water pumped into the wastewater treatment plant should not contain industrial chemicals. The individual factory releasing such waters should take individual responsibility by establishing a treatment plant at their base before releasing such water.