People now choose to live in communities and huge groups as the population grows. In order to address the treatment challenges on a broader scale, India has begun to develop decentralized sewage treatment plants. These systems are fantastic because they provide an alternative to a centralized sewage treatment facility. However, the problem arises when the plant is not operated correctly.
What are the most common issues of a Sewage Treatment plant?
Some of the common issues incorporated in a sewage treatment plant are listed as:
1. Downstream equipment failure
In the initial step of the sewage treatment process, downstream equipment is used. The screening process is in charge of removing non-biodegradable floating solids from the water. Solids such as paper, tin, plastic, rags, wood, and containers are frequently encountered in wastewater treatment plants. As a result, you must remove these wastes from the water to prevent downstream equipment from harm such as pipe blockage, excessive wear and tear, and the accumulation of unwanted items that obstruct the wastewater treatment process.
2. Effluent that has been treated but does not meet the total phosphorus target
In terms of total phosphorus, India's sewage treatment plant is used for the following:
-Chemicals will be used as little as possible;
-To cut down on operating costs;
-To obtain the TP license limits;
There is a certain chemical dosage that must be followed in order to remove or level the total phosphorous target.
You can use the fast analysis below to analyses the treatment facility and determine which chemical will work best. It's critical to assess pre- and post-precipitation, and jar testing can help you figure out which chemical is the most successful for your procedure (e.g., alum or ferric chloride).
Pre-precipitation: Phosphorus is removed from the primary settling tanks before the biological process to establish a chemical dosing point. In addition, phosphate measurements should be obtained online between the primary settling and aeration tanks as part of a feedback control system.
Post-precipitation: Phosphorus is removed in the final clarifiers or effluent filters when chemical dosing is done after the biological process. Between the aeration tanks and the final clarifier, or after the final clarifiers with feedback control, an online phosphate measurement should be obtained.Chemical dosing is used before and after the biological process, allowing for low effluent phosphorus limitations.
3. Your treated effluent is failing to meet biochemical oxygen demand (BOD) goals
The biochemical oxygen demand (BOD) is a measurement of how much oxygen is needed to degrade organic materials in water biologically. In general, when BOD levels are high, dissolved oxygen (DO) levels decrease. This is because the bacteria have a high need for oxygen, which they get from the oxygen dissolved in the water. If there is little organic waste in the water, there will be fewer bacteria to digest it, resulting in a lower BOD and a greater DO level.
4. The total nitrogen (TN) targets in your treated effluent are not being met
To figure out where your problem is, test for ammonia, nitrite, and nitrate. This will tell you where you need to focus your efforts in order to get your plant to cooperate. Most of the time, you'll find that your plant has high levels of either ammonia or nitrate, both of which contribute to high TN levels.
5. As a direct result of odor issues associated with the STP, you have a lot of complaints
The presence of hydrogen sulphide causes the odor, but it can also include mercaptans and organic acids, which encourage the growth of Sulphur-reducing bacteria. Hydrogen sulphide (H2S), a colorless gas with a nasty, pungent odor similar to rotten eggs, is produced by the bacteria. Because hydrogen sulphide gas is extremely corrosive, it must be evacuated and treated to avoid downstream device failure.
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