Oh, when it comes to the issue of high sulfur content in incoming water, many friends who work in sewage treatment may have had a headache. If this thing exceeds the standard, there will be a lot of trouble. Not to mention the difficulty of handling it, the smell is enough to be unbearable - the foul egg odor of hydrogen sulfide can make people frown when it floats up. If the concentration is too high, not only is it unpleasant, but it may also be toxic, which is not a joke for operators and the surrounding environment. So, once the sulfide content in the incoming water exceeds the standard, it is important to find a solution as soon as possible.
Firstly, we need to understand where this sulfide actually comes from. Generally speaking, sulfides in domestic sewage are not particularly high, but if industrial wastewater is mixed in, the situation is different. For example, some chemical companies, food processing plants, slaughterhouses, leather factories, etc. may discharge wastewater with high levels of sulfides. In addition, if sewage stays in the pipeline for too long, especially in anaerobic environments, bacteria will also decompose organic matter into sulfides, which is also a common source. Only by knowing the source can we prescribe the right medicine, right?
How should we handle it specifically? There are actually many methods, and we need to choose according to the actual situation.
Let's talk about what can be done in the preprocessing stage first. It's like washing dishes clean before cooking. Before sewage enters the treatment system, some sulfides should be removed to reduce the pressure of subsequent treatment. The most direct method may be physical and chemical methods. For example, adding oxidants such as hydrogen peroxide and sodium hypochlorite to react with sulfides and oxidize them into harmless substances. However, the amount of oxidant added needs to be calculated accurately. If it is added too little, it will not be used. If it is added too much, it will be wasteful and may also affect the subsequent biochemical treatment. This should be noted.
There is also a precipitation method, which involves adding metal salts such as ferric chloride, ferrous sulfate, copper sulfate, etc. to water. These metal ions can combine with sulfides to form insoluble sulfide precipitates, which can then be removed through precipitation or filtration. This method is not complicated to operate and the effect is quite obvious, but it will produce some sludge, and the subsequent treatment of sludge will also require some effort.
Oh, when it comes to the issue of high sulfur content in incoming water, many friends who work in sewage treatment may have had a headache. If this thing exceeds the standard, there will be a lot of trouble. Not to mention the difficulty of handling it, the smell is enough to be unbearable - the foul egg odor of hydrogen sulfide can make people frown when it floats up. If the concentration is too high, not only is it unpleasant, but it may also be toxic, which is not a joke for operators and the surrounding environment. So, once the sulfide content in the incoming water exceeds the standard, it is important to find a solution as soon as possible.
Firstly, we need to understand where this sulfide actually comes from. Generally speaking, sulfides in domestic sewage are not particularly high, but if industrial wastewater is mixed in, the situation is different. For example, some chemical companies, food processing plants, slaughterhouses, leather factories, etc. may discharge wastewater with high levels of sulfides. In addition, if sewage stays in the pipeline for too long, especially in anaerobic environments, bacteria will also decompose organic matter into sulfides, which is also a common source. Only by knowing the source can we prescribe the right medicine, right?
How should we handle it specifically? There are actually many methods, and we need to choose according to the actual situation.
Let's talk about what can be done in the preprocessing stage first. It's like washing dishes clean before cooking. Before sewage enters the treatment system, some sulfides should be removed to reduce the pressure of subsequent treatment. The most direct method may be physical and chemical methods. For example, adding oxidants such as hydrogen peroxide and sodium hypochlorite to react with sulfides and oxidize them into harmless substances. However, the amount of oxidant added needs to be calculated accurately. If it is added too little, it will not be used. If it is added too much, it will be wasteful and may also affect the subsequent biochemical treatment. This should be noted.
There is also a precipitation method, which involves adding metal salts such as ferric chloride, ferrous sulfate, copper sulfate, etc. to water. These metal ions can combine with sulfides to form insoluble sulfide precipitates, which can then be removed through precipitation or filtration. This method is not complicated to operate and the effect is quite obvious, but it will produce some sludge, and the subsequent treatment of sludge will also require some effort.
Also, coordination between different processing units is necessary. For example, if the pre-treatment effect is not good, the biochemical tank will have to bear greater pressure. Conversely, if the operation of the biochemical tank is unstable, it may also cause the sulfide content in the effluent to exceed the standard. So we need to consider it as a whole and keep a close eye on every aspect.
If you encounter high sulfide wastewater that is particularly difficult to treat, you may need to use multiple methods together, which is the so-called combination process. For example, first remove a portion using the blow off method, then add some oxidizing agent for further treatment, and then enter the biochemical pool to thoroughly control the microorganisms. Although it may be a bit troublesome, it can ensure that the processing effect meets the standard.
Of course, safety issues must be given top priority during the handling process. Hydrogen sulfide is a toxic gas, and high concentrations can cause poisoning and even endanger life. So during operation, the staff must take protective measures, wear gas masks, and ensure good ventilation in the work area. If some chemical agents are used, attention should also be paid to the correct storage and use methods to avoid accidents.
In general, there is no one size fits all approach to dealing with the problem of high sulfide content in incoming water, and specific situations need to be analyzed on a case by case basis. First find the source, then check how high the concentration is and how well the processing system can withstand it, and then choose the appropriate method, which may be one or a combination of several methods. Moreover, continuous monitoring, adjustment, and experience accumulation are necessary during the treatment process in order to solve this problem and ensure that sewage is discharged in compliance with standards. This not only protects the environment but also avoids unnecessary troubles.
