Can foul-smelling gases be detected?
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Can the foul odor from wastewater treatment in refineries be detected through aeration? How can one determine whether the treatment has met the standards?
Yes! There are very few units that can be monitored using equipment; I only know that the Liaoning Provincial Environmental Monitoring Station is capable of carrying out such monitoring. Additionally, the method of using a human nose to smell can also be employed. Specifically, there are olfaction testers and olfactologists. Specific methods include: the three-point comparison odor bag method and the dynamic odor meter method.
Yes! Go to the Environmental Protection Agency! The Environmental Protection Agency offers testing services, but the costs are very high.
Monitoring is carried out by the local **environmental protection agency, and a fee is certainly charged for it.
I think the first step should be to identify the main gases responsible for the foul smell, such as hydrogen sulfide, and then measure the concentration of hydrogen sulfide
What is the accuracy of the odor gas detector on the upper floor, and what is the error margin?
Wastewater aeration is also a form of pollution that deserves attention.
Our company has encountered this issue before. First, it depends on whether you have a deodorization system in place; if such a system is available, there is usually a fixed emission outlet, and sampling can be done directly at that outlet. As for the emission standards, they can be found online. Simply measuring the odor concentration isn’t particularly expensive, but analyzing the concentrations of specific odor-causing compounds is quite costly, such as organic sulfur, inorganic sulfur, ammonia nitrogen, etc. Organic sulfur can further be divided into thiols, thioethers, dimethyldisulfide, and so on. It depends on what level of analysis you want to achieve. If no deodorization device is added, only ambient air quality monitoring can be carried out, and the applicable emission standards are different
The detection of foul odors should be carried out by multiple people using their sense of smell to examine the collected gas, right?
According to the definition in (GB14554-93), malodorous gases mainly include nine components: hydrogen sulfide, methanethiol, dimethyl sulfide, dimethyldisulfide, carbon disulfide, ammonia, trimethylamine, styrene, and odor concentration. GB14554-93 specifies the emission concentrations for the above indicators. It also specifies the monitoring methods; for hydrogen sulfide, methanethiol, dimethyl sulfide, and dimethyldisulfide, gas chromatography is used (GB/T14678). For specific details, refer to GB14554-93. The standard is quite old; I’m not sure if any new standards have been released recently.