The significance of monitoring ammonia nitrogen value is different for different industries. For sewage treatment plants, monitoring the ammonia nitrogen value can help them understand the decomposition of organic matter in wastewater, thereby adjusting the treatment process and improving treatment efficiency. For chemical plants, monitoring the ammonia nitrogen value can help them understand the ammonia nitrogen content in the wastewater during the production process, so as to adjust the production process and reduce wastewater discharge. For the farming industry, monitoring the ammonia nitrogen value can help them understand the ammonia nitrogen content in the wastewater during the breeding process, so as to adjust the farming method and reduce wastewater discharge. For the food processing industry, monitoring the ammonia nitrogen value can help them understand the ammonia nitrogen content in the wastewater during the production process, so…