Hydrogen sulfide and hydrogen cyanide are highly harmful in sewers or sewage, especially hydrogen sulfide, which exists in urban sewage systems. Moreover, its sources are very wide. Hydrogen sulfide exists in the wastewater from various factories or workshops such as chemical, fur, dyeing and printing, and mining industries. Therefore, all these wastewater will be treated through sewage treatment before being discharged. So, what measures should sewage treatment plants take to prevent hydrogen sulfide poisoning? The following points can be analyzed:
1.It is necessary to accurately grasp the nature of sludge, understand the concentration of sulfides from various sources of sulfide pollution, and strictly supervise and manage factories and other places that release sulfides and acidic wastewater in excess of standards. Once any discrepancy is found, it should be reported in a timely manner and then corresponding measures should be taken.
2.Regularly inspect the working environment, pump station sump Wells, etc. When treating the sulfide concentration of the structures in the pool or well, continuous online water quality monitoring should be carried out to monitor the hydrogen sulfide concentration in the pool and well.
3.Another effective measure to prevent H2S poisoning is to use a ventilation blower. When passing through, it can disperse H2S, thereby reducing the concentration. When going into the pool or well, not only should ventilation be paid attention to, but also the situation that hydrogen sulfide has a high specific gravity and is not easily blown by the wind. When ventilating in the pipeline, the effect of one side in and one side out should be achieved. Subsequently, for ventilation within the pumping station, it is advisable to install the fan at the ground floor so as to extract the toxic gas.
4.Staff members must be equipped with H2S-proof tools, such as gas masks, etc. However, targeted filtration and irrigation are still necessary;
5.It is necessary to establish a sound working system for going into the pool and well. Entering the water collection pool to clear the garbage at the bottom can be regarded as a dangerous job. It is necessary to write a pool operation ticket in advance and get approval from relevant staff before starting the work. This can establish a management system, which can effectively control the frequency of going into the pool and well, avoid troublesome operations and reduce risks.
It is very necessary to provide safety education on preventing HS poisoning to relevant staff, so that they can avoid unnecessary injuries during the work process.
