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The purpose of this is to promptly discover the illegal operation of pollution control facilities, automatic monitoring of equipment data fraud, stealing and stealing, and other environmental violations.
Simultaneously leaving samples and sampling at regular intervals to curb enterprise online data fraud Online automatic monitoring data is an important basis for environmental law enforcement. However, some sewage treatment plants do tricks on the monitoring data, and normal data and actual excess emissions occur from time to time.
“The falsification of emission data has brought challenges to environmental supervision.†Xu Junhua, director of the Hebei Province Environmental Information Center, said that in order to solve this problem, the urban sewage treatment plant remote monitoring and enforcement inspection system established by the Hebei Provincial Department of Environmental Protection has set up a simultaneous sample retention function.
Xu Junhua explained that when the sewage treatment plant online automatic monitoring equipment to take water samples, remote monitoring system sampler can collect quantitative water samples to the sampling bottle, and record the sampling time and the corresponding bottle number, the water sample can be sampled The device is stored at low temperatures without deterioration.
"The water samples can be manually monitored after the collection, and the monitoring results can be compared with the data of the automatic monitoring equipment at the same time," said Xu Junhua.
"In law enforcement, we have found that some companies and sewage treatment plants have touched the sampling rules of automatic monitoring equipment, such as sampling once every two hours or one hour, and some companies have been spitting out excessive standards in the measurement interval." Bureau Chief Zhao Jun said.
Zhao Jun said that the time sampling can be set by the sampler information management platform arbitrarily set the sampling time, the sampler will start at the set time, the sampling time can be accurate to the minute. When the sampling interval time is set to be reduced or sampled when the automatic monitoring equipment is poor, it can better prevent enterprises from sifting out excessive standard sewage during measurement.
At the same time, this system also has the function of equal flow rate sampling. The sampler can collect the quantitative water sample from the sampling point to the sampler and distribute it into the sampling bottle according to the change of the sewage discharge amount. This function can effectively prevent polluting companies from discharging a large amount of wastewater in a short time.
Exceeding the standard to keep samples for environmental law enforcement officers to obtain evidence "The most difficult part in environmental supervision is the collection of evidence. Some companies have shirking behavior, but when law enforcement personnel arrive at the scene, the evidence for evacuation is often gone." Hebei Province Environmental Law Enforcement Hu Ming, an investigator at the inspection bureau, said that the new remote monitoring and law enforcement spot check system has achieved sample retention.
Hebei Ruijie Environmental Protection Company is responsible for the maintenance and technical support of the remote monitoring and enforcement sampling system. Liu Ying, the company's deputy general manager, said that the over-standard retention model can be divided into two types:
First, when the sampler is used in conjunction with a single automatic monitoring device, if the measurement result of the automatic monitoring device exceeds the emission standard, the sampler will sample the water sample in the mixed sampling bucket synchronously to the designated sampling bottle.
Second, when the sampler is used with multiple automatic monitoring devices, any one of the multiple automatic monitoring devices exceeds the emission standard. The automatic sampler collects the water sample into the designated sampling bottle.
When the law enforcement personnel take samples on the spot, through the manual monitoring results, the analysis and judgment are to automatically monitor the equipment failure or the enterprise exceeds the standard emission, which is convenient for environmental law enforcement personnel to obtain evidence.
"In fact, this system can also preserve evidence by synchronizing the sample retention function." Liu Ying said that when an online monitor takes a water sample, the automatic sampler backs up the water sample at the same time.
Liu Ying explained that when the monitor detects that the water sample is qualified, the back-up water sample will be automatically released; when the indicator is exceeded, the back-up water sample will automatically enter the cryostat and be retained as evidence.
Change on-site inspection for on-site verification, reduce enforcement costs, "The water quality automatic sampler is actually a smart water quality automatic sampling device." Liu Ying demonstrated the remote automatic spot checks water quality system operation.
The first step is to enter the control interface of the water quality automatic sampler, set the sampling time of the designated company, and the water quality automatic sampler will start at the set time.
After the sampling pump starts operation, the pipeline is first cleaned; in the outlet, the water sample is taken and the water sample is taken through the conversion of the regulating valve, and the water sample will be taken into the designated sampling bottle.
After the withdrawal is completed, the system automatically cleans the pipeline and drains the water sample in the pipeline. Then the positioning device moves to the next bottle to prepare for the next sampling. The water sample is stored in the cold room of the sampler. save. At this point, the automatic sample keeping work is over.
Han Chunliang, assistant to the director of the Hebei Provincial Environmental Information Center, said that in the past environmental law enforcement, law enforcement personnel were required to go to the site for sampling. This gave some unscrupulous companies time to prepare. Now through this system, the environmental protection department can spot check the company's sewage at any time. Law enforcement officers only need to go to the scene to check and remove the retained water samples.
On April 29 this year, the Hebei Provincial Department of Environmental Protection and the Provincial Public Security Department launched a zero-point campaign to “sadly destroy the sword.†Using a remote law enforcement spot-check system, 15 key sewage treatment plants were spot checked, and manual monitoring results based on water samples were taken. Determine whether the discharge of sewage treatment plants meets the standard.
Eight of the 15 spot-checking units had excessive emissions problems. The remote automatic sampling equipment left three time water quality samples for the sampling units, which were at 0:00, 4:00, and 8:00 on April 29.
In the monitoring results of Yucheng Urban Water Treatment Center, the chemical oxygen demand concentration was manually monitored by the remote environmental monitoring station at the remote sample conservation station: 98 mg/L, 103 mg/L, 102 mg/L, and the emission standard exceeding 50 mg/L was doubled. At the same time, the on-line monitoring data of chemical oxygen demand displayed by the automatic monitoring equipment of the sewage treatment plant at the three time points were: 46.7 mg/L, 48.2 mg/L, and 40.2 mg/L.
A careful comparison of the monitoring data of 8 sewage treatment plants that exceeded the standard discharge found that the manual monitoring data of 8 companies were not consistent with the online monitoring data of the enterprise, and the data displayed by the online monitoring equipment was significantly smaller than the actual emission concentration.
“The Zero Operation of the Liberal Sword†is the first large-scale application of the remote monitoring and law enforcement spot-checking system in environmental law enforcement in Hebei Province.†Zhao Jun said that from the perspective of the application of this action, the system not only realized the urban sewage treatment plant. Remote automatic law enforcement reduces the cost of environmental law enforcement, and also reduces human interference in law enforcement and human law enforcement.
Sewage discharge online monitoring data false nowhere
Introduction: Hebei Provincial Department of Environmental Protection installs water quality automatic samplers at the discharge outlets of 97 urban sewage treatment plants across the province, and establishes a sampler information management platform synchronously. The aim is to promptly discover that pollution control facilities are not operating properly and that automatic monitoring equipment data is fraudulent. Stealing, stealing and other environmental violations. The Hebei Provincial Environmental Protection Agency installed water quality automatic samplers at the discharge outlets of 97 urban sewage treatment plants in the province, established a sampler information management platform synchronously, preserved sample records and door records for automatic sampling of water quality, and achieved an automatic sampler for water quality. Remote setting and control.