When organic material is digested in absence of oxygen in what is known as anaerobic digestion, it results to production of hydrogen sulfide gas among other products. This gas is colorless and has a characteristic of foul smell. Normally, this kind of bacterial activity occurs in sewers and swamps. It is no wonder sewers produce a bad smell like that of rotten eggs because of this gas. There is need for hydrogen sulfide reduction in the sewers as showcased in this article.
There are usually a lot of concerns among environmental specialists with the production of this gas in the sewage system. This is because it contributes greatly to the rust problems in the sewer structures and also people living near sewage systems always complain of odor problems. For people wondering how corrosion comes about, it results when the sulfide gas produced combines with water in the system resulting to formation of hydro sulfuric acid that corrodes infrastructure.
For these two reasons, specialists saw the need of controlling this gas in the sewer line. There are many ways that have been devised to control this problem. One method is by adding strong alkali solution to the sewage. Examples of two strong alkalis include magnesium hydroxide and sodium hydroxide and these are the ones used in this process. Each of these hydroxides when added raises the pH of the sewage making it difficult for this gas to be produced.
Another way devised to control the odor problems is through addition of chemical compounds also known as chemical treatment. The most used compounds in this treatment are chlorine compounds like sodium hypochlorite, calcium hypochlorite, ferric chloride and bleach. They are added to the sewage and they oxidize the sulfides hence preventing formation of the gas.
However this addition of chemical compounds can be challenging when there is no pumping post from which the chemicals are fed into the system. Therefore a chemical feed system should be established to make this process easier. The feed system should also be monitored to ensure effective treatment system. Safety measures are usually considered when carrying out this chemical treatment.
To resolve corrosion issues, the environmental specialists have come with measures to increase ventilation in the sewage infrastructure to prevent anaerobic conditions for bacteria. Apart from this, contractors of the systems are now using sewer pipes and tanks with protective coatings on the inner sides. The coatings used include; vinyl, tar products, polythene linings, cement among other materials to protect the system against corrosion.
Yet another method of corrosion control is by spraying the crown and manhole. At the crown of a pipe is where rust is mostly at its worst because the acid collects on this area. The effect of this is weakening and collapse of the pipe. The agent that is sprayed on these structures is known as Sulfa Lock Gel and this one guards the surfaces from intense acid effects.
The last measure is through the use of a monitoring meter known as the liquid phase sulfide meter to measure amount of sulfide in wastes that come from industries. Therefore when the sulfides are above a certain measure, the wastes have to undergo pre treatment process first they are taken to the sewer system. From this article, we learn on the different measures of hydrogen sulfide reduction in waste water collection systems. Specialists are still researching on other advanced methods to curb this problem.
There are usually a lot of concerns among environmental specialists with the production of this gas in the sewage system. This is because it contributes greatly to the rust problems in the sewer structures and also people living near sewage systems always complain of odor problems. For people wondering how corrosion comes about, it results when the sulfide gas produced combines with water in the system resulting to formation of hydro sulfuric acid that corrodes infrastructure.
For these two reasons, specialists saw the need of controlling this gas in the sewer line. There are many ways that have been devised to control this problem. One method is by adding strong alkali solution to the sewage. Examples of two strong alkalis include magnesium hydroxide and sodium hydroxide and these are the ones used in this process. Each of these hydroxides when added raises the pH of the sewage making it difficult for this gas to be produced.
Another way devised to control the odor problems is through addition of chemical compounds also known as chemical treatment. The most used compounds in this treatment are chlorine compounds like sodium hypochlorite, calcium hypochlorite, ferric chloride and bleach. They are added to the sewage and they oxidize the sulfides hence preventing formation of the gas.
However this addition of chemical compounds can be challenging when there is no pumping post from which the chemicals are fed into the system. Therefore a chemical feed system should be established to make this process easier. The feed system should also be monitored to ensure effective treatment system. Safety measures are usually considered when carrying out this chemical treatment.
To resolve corrosion issues, the environmental specialists have come with measures to increase ventilation in the sewage infrastructure to prevent anaerobic conditions for bacteria. Apart from this, contractors of the systems are now using sewer pipes and tanks with protective coatings on the inner sides. The coatings used include; vinyl, tar products, polythene linings, cement among other materials to protect the system against corrosion.
Yet another method of corrosion control is by spraying the crown and manhole. At the crown of a pipe is where rust is mostly at its worst because the acid collects on this area. The effect of this is weakening and collapse of the pipe. The agent that is sprayed on these structures is known as Sulfa Lock Gel and this one guards the surfaces from intense acid effects.
The last measure is through the use of a monitoring meter known as the liquid phase sulfide meter to measure amount of sulfide in wastes that come from industries. Therefore when the sulfides are above a certain measure, the wastes have to undergo pre treatment process first they are taken to the sewer system. From this article, we learn on the different measures of hydrogen sulfide reduction in waste water collection systems. Specialists are still researching on other advanced methods to curb this problem.
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