Waste Water treatment plant diagram
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Stage One — Bar Screening
Removal of large items from the influent to prevent damage to the facility’s pumps, valves and other equipment.
The process of treating and reclaiming water from wastewater (any water that has been used in homes, such as flushing toilets, washing dishes, or bathing, and some water from industrial use and storm sewers) starts with the expectation that after it is treated it will be clean enough to reenter the environment.
Stage Two — Screening
Removal of grit by flowing the influent over/through a grit chamber.
Fine grit that finds its way into the influent needs to be removed to prevent the damage of pumps and equipment downstream (or impact water flow). Too small to be screened out, this grit needs to be removed from the grit chamber. There are several types of grit chambers (horizontal, aerated or vortex) which control the flow of water, allowing the heavier grit to fall to the bottom of the chamber; the water and organic material continue to flow to the next stage in the process. The grit is physically removed from the bottom of the chamber and discarded.
Stage Three — Primary Clarifier
Initial separation of solid organic matter from wastewater.
Solids known as organics/sludge sink to the bottom of the tank and are pumped to a sludge digestor or sludge processing area, dried and hauled away. Proper settling rates are a key indicator for how well the clarifier is operating. Adjusting flow rate into the clarifier can help the operator adjust the settling rates and efficiency.
Stage Four — Aeration
Air is pumped into the aeration tank/basin to encourage conversion of NH3 to NO3 and provide oxygen for bacteria to continue to propagate and grow. Once converted to NO3, the bacteria remove/strip oxygen molecules from the nitrate molecules and the nitrogen (N) is given off as N2↑ (nitrogen gas).
Stage Five — Secondary Clarifier
Treated wastewater is pumped into a secondary clarifier to allow any remaining organic sediment to settle out of treated water flow.
Stage Six — Chlorination (Disinfection)
Chlorine is added to kill any remaining bacteria in the contact chamber.
Stage Seven — Water Analysis & Testing
Testing for proper pH level, ammonia, nitrates, phosphates, dissolved oxygen, and residual chlorine levels to conform to the plant’s NPDES permit are critical to the plant’s performance.
Stage Eight — Effluent Disposal
After meeting all permit specifications, clean water is reintroduced into the environment.
Although testing is continuous throughout the wastewater treatment process to ensure optimal water flow, clarification and aeration, final testing is done to make sure the effluent leaving the plant meets permit specifications. Plants that don`t meet permit discharge levels are subject to fines and possible incarceration of the operator in charge.
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Explanation:
HERE IT IS DIAGRAM OF WASTEWATER TREATMENT PLANT
