CN102507884A - Method for determining sampling time and proportion coefficient based on wastewater discharging proportion - Google Patents
Method for determining sampling time and proportion coefficient based on wastewater discharging proportion Download PDFInfo
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- CN102507884A CN102507884A CN2011102805853A CN201110280585A CN102507884A CN 102507884 A CN102507884 A CN 102507884A CN 2011102805853 A CN2011102805853 A CN 2011102805853A CN 201110280585 A CN201110280585 A CN 201110280585A CN 102507884 A CN102507884 A CN 102507884A
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Abstract
The invention discloses a method for determining the sampling time and the proportion coefficient based on a wastewater discharging proportion. According to the invention, the sampling time of each sampling period is generated in a random mode, so a phenomenon of the underlying discharge of dishonest enterprises by fixing the sampling time interval through using the original proportion can be effectively overawed and avoided; and the continuous adjustment of the proportion sampling coefficient k makes the volume of the collected water sample of each analytic period account for 40-75% of the total volume of a proportion sampling storage device as far as possible. The method makes the wastewater proportion sampling to be scientific and accurate, and environmental protection controlling authorities to be powerful.
Description
Technical field
The present invention relates to a kind of definite method, belong to discharge of wastewater monitoring technique field based on the discharge of wastewater proportional sampling moment and scale-up factor.
Background technology
Point out in " collection of drainage dues use and management regulations "; Kind, quantity according to the waste water that discharges are carried out the collection of charges for disposing pollutants; The discharger should declare kind, the quantity that discharges pollutants according to the regulation of competent administrative department for environmental protection of State Council to competent administrative department for environmental protection of local people's governments at or above the county level.So, the various contaminated wastewater thing total amounts of being discharged are monitored become particularly important, also be the great change of China's environmental management system.Contaminated wastewater thing total amount monitoring is controlled for the total amount of pollutant scientific basis is provided, for the decomposition of overall control target provides support, for examination, the law-enforcing work of overall control target provides safeguard.
China's contaminated wastewater thing total amount monitoring mode has progressively adopted the monitoring of waste water automatic on-line; Also there are some enterprises that the online proportional sampling device of waste water has been installed at present; Sample mode is following as the one of which: the total amount of one whole sampling storage is divided into N sampling period t with analytical cycle T (being generally 24 hours perhaps 48 hours), in each sampling period t according to flow Q
iWith the scale-up factor k that sets to the waste water k*Q that takes a sample automatically
iAnd mix, after finishing, an analytical cycle T records the mixed sample pollutant levels of gathering
Then calculate this analytical cycle internal contamination thing total emission volumn
Wherein
But these proportional sampling devices have following deficiency when carrying out proportional sampling:
1) sampling instant is fixed in each sampling period, and this steals row just for the enforcement surprise attack after findding out the rule of sampling of some non-honest enterprises possibility is provided;
2) proportional sampling coefficient k immobilizes; If obviously initial scale-up factor is provided with unreasonable; The water sample of gathering such as each analytical cycle is less than 20% of proportional sampling memory storage, and is obviously reasonable inadequately, for the measurement result of the total amount of pollutant also with regard to out of true.
Summary of the invention
Technical matters to be solved by this invention is to confirm not accurate enough shortcoming in order to overcome the coefficient of fixing, sample of existing online proportional sampling device sampling time of contaminated wastewater thing total amount; Propose a kind of definite method, can effectively solve the deficiency of existing proportional sampling method based on the discharge of wastewater proportional sampling moment and scale-up factor.
The present invention adopts following technical scheme for solving the problems of the technologies described above:
It is a kind of based on the sampling instant of discharge of wastewater ratio and definite method of scale-up factor,
Definite method step of said sampling instant is:
Steps A produces the sampling instant in each sampling period of proportional sampling at random through the sampling of wastewater intelligent controller, and sampling instant is fixing in each sampling period;
Step B, whether the time interval of judging the sampling instant that this proportional sampling produces and the sampling instant in last sampling period less than 1/5 of the sampling period,
When the result for being then to return steps A and produce sampling instant again at random;
When the result is not, then sample according to the sampling instant that generates;
Step C, this sampling period finishes, and returns steps A;
Definite method step of said scale-up factor is:
Step D tries to achieve initial proportion sampling coefficient k for
Wherein T representes the total amount sampling storage and the analytical cycle of one whole, q
MaxThe maximum instantaneous delivery that allows of expression sewage draining exit discharge of wastewater, V representes the volume of waste water proportional sampling memory storage;
Step e, after the total amount collection storage and analytical cycle T end of one whole, the water sample in the judgement waste water proportional sampling memory storage and the ratio of this sampling memory storage volume:
E-1, when said ratio less than 10%, then in next analytical cycle, the k value increased and is twice;
E-2, when said ratio greater than 75%, then in next analytical cycle with k value downward modulation 10%;
E-3, in continuous 3 total amount collection storages and analytical cycle T, said ratio all is no more than 40%, then in next analytical cycle, k is increased 20%; Other situation k value remains unchanged.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
Sampling time in each sampling period of proportional sampling is unfixing, and the sampling time is effective and reasonable, can effectively deter and avoid non-honest enterprise to utilize original proportional sampling fixed sample time interval surprise attack to steal row's phenomenon; The adjustment of continuing to optimize through Comparative Examples sampling coefficient k; Make total amount collection storage and the interior water sample of gathering of analytical cycle that each is complete remain on 40%～75% of proportional sampling memory storage cumulative volume as far as possible; Gathering water sample can too much can be not very few yet; Thereby can make that test result is more accurate, thereby the monitoring of final total amount is also just more accurate, the supervision of environmental protection supervision department is more strong.
Description of drawings
Fig. 1 confirms method flow diagram constantly for proportional sampling;
Fig. 2 confirms method flow diagram for the proportional sampling coefficient k;
Fig. 3 is the real system structural representation of the present invention's utilization.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is done further detailed description:
Fig. 3 is the real system structural drawing of the present invention's utilization, by field instrumentation flowmeter 1, sampling of wastewater intelligent controller 2, peristaltic pump 3, waste water proportional sampling memory storage 4, environment protection digital Acquisition Instrument 5, wireless GPRS terminal 6 and contaminated wastewater thing on-line testing appearance (like COD tester, ammonia nitrogen tester or the like) and the management for environment monitor information system platform that is placed on environment supervision department 10 formations.The environment protection digital Acquisition Instrument is that collection site is original in the native system; The sampling of wastewater intelligent controller can replace the environment protection digital Acquisition Instrument of original collection site and leave the interface with its communication; When being transformed, can existing environment protection digital Acquisition Instrument not removed the blowdown field instrumentation; Utilize the sampling of wastewater intelligent controller to carry out the mutual of information with the communication interface of environment protection digital Acquisition Instrument; Communicate through original GPRS terminal and management for environment monitor information platform again or, the GPRS wireless terminal directly is installed on the sampling of wastewater intelligent controller is communicated not through the environment protection digital Acquisition Instrument.
In conjunction with Fig. 1, shown in Figure 2, the concrete working method of present embodiment is following:
1) staff of environment supervision department sets the sampling period t of on-the-spot waste water proportional sampling through the management for environment monitor information platform that is placed on environment supervision department, can be set to 5 minutes to 30 minutes, if be not provided with then be defaulted as 15 minutes.
2) the sampling period information of setting is sent to on-the-spot GPRS terminal through GPRS, finally is sent to the sampling of wastewater intelligent controller, in order to control the sampling of on-the-spot waste water proportional sampling.
3) through on-the-spot flowmeter the instantaneous delivery in the sampling period is measured as q (t), sampling controller calculates integrated flux Q
i, according to integrated flux Q
iCalculate to such an extent that should required sampling waste water sample of sampling period be kQ in proportion
i, the coefficient k of wherein taking a sample is the scale-up factor of proportional sampling, scale-up factor does not change in the total amount of one whole is sampled storage and analytical cycle T.
Definite method of scale-up factor is following: total amount sampling storage and analytical cycle T, sampling period t, design code according to one whole should be arranged the maximum instantaneous delivery q that allows of mouthful discharge of wastewater
MaxWith the volume V of waste water proportional sampling memory storage and relational expression each other
Trying to achieve initial proportion sampling coefficient k does
Initial proportional sampling coefficient is sampled as for the first time complete total amount sampling storage and the proportional sampling coefficient in the analytical cycle;, then in next analytical cycle, the k value increased and be twice less than 10% of volume like water sample in the waste water proportional sampling memory storage in the total amount collection storage of one whole and analytical cycle T; Greater than 75% of volume, then in next analytical cycle, the k value is reduced 10% like water sample in the waste water proportional sampling memory storage in an analytical cycle T; All be no more than 40% like water sample in the waste water proportional sampling memory storage in continuous 3 analytical cycle T, then in next analytical cycle, k increased 20%; Other situation k value remains unchanged.
4) the sampling of wastewater intelligent controller produces the sampling moment in each sampling period of proportional sampling at random; Sampling instant is unfixing in each sampling period; Like the sampling time interval in moment of this generation and last sampling period less than 1/5 of the sampling period; Then produce at random again sampling instant with avoid two periodic samplings constantly very near, up to satisfy till the above-mentioned condition (sampling instant that produces at random certainly can guarantee this time be carved into this sampling period and can accomplish sampling when finishing).
The waste water sample of 5) adopting in each sampling period t is stored in the waste water proportional sampling memory storage; After the total amount sampling storage and analytical cycle T end of one whole; T is generally 24 hours or 48 hours, through on-the-spot contaminated wastewater substrate concentration on-line testing instrument (COD tester, ammonia nitrogen tester or the like) waste water sample of being gathered is carried out analytical test and gets pollutant levels and be respectively
sampling of wastewater intelligent controller and calculate this analytical cycle gross contamination emission
wherein
6) each pollutant load that records in the total amount of one whole sampling storage and the analytical cycle T is sent to the management for environment monitor information platform of environmental protection supervision department through the GPRS wireless terminal; Waste water is gathered in emptying, begins new analytical cycle.
The foregoing description has embodied the present invention and can effectively deter and avoid non-honest enterprise to utilize original proportional sampling fixed sample time interval surprise attack to steal row's phenomenon; The waste water proportional sampling is science, reasonable more, thereby makes that the monitoring of contaminated wastewater substrate concentration total amount is more accurate.
Claims (1)
1. one kind based on the sampling instant of discharge of wastewater ratio and definite method of scale-up factor, it is characterized in that:
Definite method step of said sampling instant is:
Steps A produces the sampling instant in each sampling period of proportional sampling at random through the sampling of wastewater intelligent controller, and sampling instant is fixing in each sampling period;
Step B, whether the time interval of judging the sampling instant that this proportional sampling produces and the sampling instant in last sampling period less than 1/5 of the sampling period,
When the result for being then to return steps A and produce sampling instant again at random;
When the result is not, then sample according to the sampling instant that generates;
Step C, this sampling period finishes, and returns steps A;
Definite method step of said scale-up factor is:
Step D tries to achieve initial proportion sampling coefficient k for
Wherein T representes the total amount sampling storage and the analytical cycle of one whole, q
MaxThe maximum instantaneous delivery that allows of expression sewage draining exit discharge of wastewater, V representes the volume of waste water proportional sampling memory storage;
Step e, after the total amount collection storage and analytical cycle T end of one whole, the water sample in the judgement waste water proportional sampling memory storage and the ratio of this sampling memory storage volume:
E-1, when said ratio less than 10%, then in next analytical cycle, the k value increased and is twice;
E-2, when said ratio greater than 75%, then in next analytical cycle with k value downward modulation 10%;
E-3, in continuous 3 total amount collection storages and analytical cycle T, said ratio all is no more than 40%, then in next analytical cycle, k is increased 20%; Other situation k value remains unchanged.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103884540A (en) * | 2014-04-07 | 2014-06-25 | 杭州安控环保科技有限公司 | Multifunctional tracking and sampling linkage system |
| CN108287659A (en) * | 2018-01-19 | 2018-07-17 | 北京奇艺世纪科技有限公司 | A kind of data sampling method, device and electronic equipment based on real-time stream |
| CN108333317A (en) * | 2017-12-30 | 2018-07-27 | 聚光科技(杭州)股份有限公司 | The monitoring method in random exhaust emission source |
| CN111639716A (en) * | 2020-06-04 | 2020-09-08 | 云南电网有限责任公司电力科学研究院 | Data sample selection method and device based on density deviation sampling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103884540A (en) * | 2014-04-07 | 2014-06-25 | 杭州安控环保科技有限公司 | Multifunctional tracking and sampling linkage system |
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| CN111639716A (en) * | 2020-06-04 | 2020-09-08 | 云南电网有限责任公司电力科学研究院 | Data sample selection method and device based on density deviation sampling |
| CN111639716B (en) * | 2020-06-04 | 2023-07-18 | 云南电网有限责任公司电力科学研究院 | Data sample selection method and device based on density deviation sampling |
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Inventor after: Zhou Xingpeng Inventor after: Li Jing Inventor after: Yuan Yizhi Inventor after: Gao Yu Inventor after: Sun Kai Inventor before: Zhou Xingpeng Inventor before: Li Jing Inventor before: Gao Yu Inventor before: Sun Kai |
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