Hydrogen sulfide is a colorless gas produced when organic matter is being broken down by bacteria in absence of oxygen. This procedure is usually referred to as anaerobic digestion and can occur in swamps and sewers. It can also occur naturally as natural gas or in volcanic gases. This gas has a characteristic smell of rotten eggs no wonder the foul smell usually produced by sewers. It is no wonder specialists are concerned with hydrogen sulfide reduction in the sewer system.
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.
There is thus need to control the production of this gas in waste water collection system to very low levels. One way which specialists have found to reduce production of this gas is through addition of a strong alkali or soluble basic solution. The basic solution for instance sodium hydroxide (NAOH) or magnesium hydroxide when added to sewage increases the pH and this leads to limited formation of the gas.
The other method is chemical treatment where certain chemicals are released into the sewer. More often than not, chloride compounds are the ones usually fed into the system. Examples of these compounds include; calcium and sodium hypochlorite, ferric chloride or bleach. When any of these compounds are added to sewage, they lead to oxidation of sulfides hence the gas will not be formed.
But with this chemical treatment, certain requirements have to be met. First there needs to be a feed system established from which the chemicals are pumped into the waste water. This feed system might take some time and even money to be established. Another thing is that the feeding system needs to be monitored constantly to ensure it is working well. At all times, safety measures must always be considered.
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.
Crown and manhole spraying is yet the other measure used in corrosion control. When the hydro sulfuric acid is forms, it collects mostly at the crown part of the pipe. The effect on this area is intense decomposition leading to weakening of the pipe and in worst cases collapse. Therefore a Sulfa Lock Gel is sprayed on these areas so as to prevent the bad effects of hydro sulfuric acid.
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.
There is thus need to control the production of this gas in waste water collection system to very low levels. One way which specialists have found to reduce production of this gas is through addition of a strong alkali or soluble basic solution. The basic solution for instance sodium hydroxide (NAOH) or magnesium hydroxide when added to sewage increases the pH and this leads to limited formation of the gas.
The other method is chemical treatment where certain chemicals are released into the sewer. More often than not, chloride compounds are the ones usually fed into the system. Examples of these compounds include; calcium and sodium hypochlorite, ferric chloride or bleach. When any of these compounds are added to sewage, they lead to oxidation of sulfides hence the gas will not be formed.
But with this chemical treatment, certain requirements have to be met. First there needs to be a feed system established from which the chemicals are pumped into the waste water. This feed system might take some time and even money to be established. Another thing is that the feeding system needs to be monitored constantly to ensure it is working well. At all times, safety measures must always be considered.
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.
Crown and manhole spraying is yet the other measure used in corrosion control. When the hydro sulfuric acid is forms, it collects mostly at the crown part of the pipe. The effect on this area is intense decomposition leading to weakening of the pipe and in worst cases collapse. Therefore a Sulfa Lock Gel is sprayed on these areas so as to prevent the bad effects of hydro sulfuric acid.
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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