CN102507884B - 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 PDF

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CN102507884B
CN102507884B CN201110280585.3A CN201110280585A CN102507884B CN 102507884 B CN102507884 B CN 102507884B CN 201110280585 A CN201110280585 A CN 201110280585A CN 102507884 B CN102507884 B CN 102507884B
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sampling
proportion
wastewater
analytical cycle
ratio
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CN102507884A (en
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周杏鹏
李靖
袁易之
皋宇
孙凯
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Southeast University
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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

Definite method based on the discharge of wastewater proportional sampling moment and scale-up factor
Technical field
The present invention relates to a kind of definite method based on the discharge of wastewater proportional sampling moment and scale-up factor, belong to discharge of wastewater monitoring technique field.
Background technology
In < < Administrative Regulations on Pollution Discharge Fee Levy > >, point out; kind, quantity according to the waste water of discharge are carried out the collection of charges for disposing pollutants; discharger should declare kind, the quantity discharging pollutants according to the competent administrative department for environmental protection of regulation ,Xiang local people's governments at or above the county level of competent administrative department for environmental protection of State Council.So, discharged various Wastewater Pollutant total amounts are monitored to the great change of particularly important ,Ye Shi China environmental management system that becomes.Total Amount Monitoring of Wastewater Pollutant is controlled scientific basis is provided for the total amount of pollutant, for the decomposition of Target of Total Pollutant Amount Control provides support, for examination, the law-enforcing work of Target of Total Pollutant Amount Control provides safeguard.
China's total Amount Monitoring of Wastewater Pollutant mode has progressively adopted the monitoring of waste water automatic on-line, also there are at present some enterprises that the online proportional sampling device of waste water has been installed, its general sample mode is as follows: once complete total amount samples storage and analytical cycle T (being generally 24 hours or 48 hours) are divided into N sampling period t, in each sampling period t according to flow Q ifollow the scale-up factor k setting to waste water automatic sampling k*Q iand mix, after finishing, an analytical cycle T records gathered mixed sample pollutant levels
Figure BDA0000092888170000011
calculate this analytical cycle internal contamination thing total emission volumn
Figure BDA0000092888170000012
wherein
Figure BDA0000092888170000013
But these proportional sampling devices have following deficiency when carrying out proportional sampling:
1) in each sampling period, sampling instant is fixed, and this steals row just to 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 arranges unreasonable, the water sample gathering such as each analytical cycle is less than 20% of proportional sampling memory storage, obviously reasonable not, 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 in order to overcome the not accurate enough shortcoming of parameter identification of fixing, sample of online proportional sampling device sampling time of existing Wastewater Pollutant total amount, propose a kind of definite method based on the discharge of wastewater proportional sampling moment and scale-up factor, can effectively solve the deficiency of existing proportional sampling method.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A definite method for sampling instant based on discharge of wastewater ratio and scale-up factor,
Definite method step of described sampling instant is:
Steps A, produces the sampling instant in each sampling period of proportional sampling at random by sampling of wastewater intelligent controller, in each sampling period, sampling instant is fixing;
Step B, judges whether sampling instant that this proportional sampling produces and the time interval of the sampling instant in last sampling period are less than 1/5 of the sampling period,
When result is yes, return to steps A and again produce at random sampling instant;
When result is no, according to the sampling instant generating, sample;
Step C, this sampling period finishes, and returns to steps A;
Definite method step of described scale-up factor is:
Step D, tries to achieve initial proportion sampling coefficient k and is
Figure BDA0000092888170000021
Wherein T represents once complete total amount samples storage and analytical cycle, q maxrepresent the maximum instantaneous delivery that allows of sewage draining exit discharge of wastewater, V represents the volume of waste water ratio samples storage device;
Step e, after once complete total amount collection storage and analytical cycle T finish, the water sample in judgement waste water ratio samples storage device and the ratio of this samples storage device volume:
E-1 when described ratio is less than 10%, increases k value to be twice in next analytical cycle;
E-2 when described ratio is greater than 75%, lowers 10% by k value in next analytical cycle;
E-3, in continuous 3 total amount collection storages and analytical cycle T, described ratio is all no more than 40%, in next analytical cycle, k is increased to 20%; Other situations 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; By the sample adjustment of continuing to optimize of coefficient k of comparative example, make to gather water sample in each complete total amount collection storage and analytical cycle and remain on as far as possible 40%~75% of proportional sampling memory storage cumulative volume, gathering water sample can too much can be not very few yet, thereby can make test result more accurate, thereby also just the supervision of more accurate Liao, environmental protection supervision department is more strong for final total Amount Monitoring.
Accompanying drawing explanation
Fig. 1 is that method flow diagram is determined in proportional sampling constantly;
Fig. 2 is that proportional sampling coefficient k is determined method flow diagram;
Fig. 3 is the real system structural representation that the present invention uses.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
Fig. 3 is the real system structural drawing that the present invention uses, and field instrumentation flowmeter 1, sampling of wastewater intelligent controller 2, peristaltic pump 3, waste water ratio samples storage device 4, environment protection digital Acquisition Instrument 5, wireless GPRS terminal 6 and Wastewater Pollutant on-line testing instrument (as COD tester, ammonia nitrogen tester etc.) and the management for environment monitor information system platform 10 that is placed on environment supervision department, consists of.In native system, environment protection digital Acquisition Instrument is that collection site is original, 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 blowdown field instrumentation, utilize sampling of wastewater intelligent controller to carry out the mutual of information with the communication interface of environment protection digital Acquisition Instrument, again by original GPRS terminal and management for environment monitor information platform communicates or by environment protection digital Acquisition Instrument, GPRS wireless terminal is directly installed on sampling of wastewater intelligent controller to be communicated.
Shown in Fig. 1, Fig. 2, the specific works mode of the present embodiment is as follows:
1) staff of environment supervision department sets the sampling period t of on-the-spot waste water proportional sampling by being placed on the management for environment monitor information platform of environment supervision department, can be set to 5 minutes to 30 minutes, if do not arranged, is defaulted as 15 minutes.
2) the sampling period information exchange of setting is crossed GPRS and is sent to on-the-spot GPRS terminal, is finally sent to sampling of wastewater intelligent controller, in order to control the sampling of on-the-spot waste water proportional sampling.
3) by on-the-spot flowmeter, the instantaneous delivery in the sampling period is measured as to q (t), sampling controller calculates integrated flux Q i, according to integrated flux Q icalculate in proportion to such an extent that required sampling waste water sample of this sampling period is kQ i, wherein sampling the scale-up factor that coefficient k is proportional sampling, scale-up factor does not change in once complete total amount samples storage and analytical cycle T.
Definite method of scale-up factor is as follows: according to once complete total amount samples storage and analytical cycle T, sampling period t, this row of design code mouthful discharge of wastewater maximum, allow instantaneous delivery q maxwith the volume V of waste water ratio samples storage device and relational expression each other trying to achieve initial proportion sampling coefficient k is
Figure BDA0000092888170000032
initial proportional sampling coefficient is sampled as complete for the first time total amount samples storage and the proportional sampling coefficient in analytical cycle, as water sample in waste water ratio samples storage device in the total amount collection storage once complete and analytical cycle T is less than 10% of volume, in next analytical cycle, k value is increased and is twice; As water sample in waste water ratio samples storage device in an analytical cycle T is greater than 75% of volume, in next analytical cycle, k value is lowered to 10%; As water sample in waste water ratio samples storage device in continuous 3 analytical cycle T is all no more than 40%, in next analytical cycle, k is increased to 20%; Other situations k value remains unchanged.
4) sampling of wastewater intelligent controller produces the sampling moment in each sampling period of proportional sampling at random, in each sampling period, sampling instant is unfixing, as the moment of this generation and the sampling time interval in last sampling period are less than 1/5 of the sampling period, again produce at random sampling instant to avoid two periodic samplings constantly very close, until meet above-mentioned condition (the certainly random sampling instant producing can guarantee this time be carved into this sampling period and can complete sampling while finishing).
5) waste water sample of adopting in each sampling period t is stored in waste water ratio samples storage device, after once complete total amount samples storage and analytical cycle T finish, T is generally 24 hours or 48 hours, by on-the-spot contaminated wastewater substrate concentration On-line Instrument (COD tester, ammonia nitrogen tester etc.), gathered waste water sample is carried out to analytical test and obtains pollutant levels and be respectively
Figure BDA0000092888170000041
sampling of wastewater intelligent controller calculates this analytical cycle gross contamination emission
Figure BDA0000092888170000042
wherein
6) each pollutant load recording in once complete total amount samples storage and analytical cycle T is sent to the management for environment monitor information platform of environmental protection supervision department by GPRS wireless terminal; Emptying collection waste water, starts new analytical cycle.
Above-described embodiment 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, waste water proportional sampling is science, reasonable more, thereby makes contaminated wastewater substrate concentration total Amount Monitoring more accurate.

Claims (1)

1. a definite method for the sampling instant based on discharge of wastewater ratio and scale-up factor, is characterized in that:
Definite method step of described sampling instant is:
Steps A, produces the sampling instant in each sampling period of proportional sampling at random by sampling of wastewater intelligent controller, in each sampling period, sampling instant is fixing;
Step B, judges whether the interval in the moment of this generation and the sampling time in last sampling period is less than 1/5 of the sampling period,
When result is yes, return to steps A and again produce at random sampling instant;
When result is no, according to the sampling instant generating, sample;
Step C, this sampling period finishes, and returns to steps A;
Definite method step of described scale-up factor is:
Step D, tries to achieve initial proportion sampling coefficient k and is
Figure 2011102805853100001DEST_PATH_IMAGE002
,
Wherein T represents once complete total amount samples storage and analytical cycle, q maxrepresent the maximum instantaneous delivery that allows of sewage draining exit discharge of wastewater, V represents the volume of waste water ratio samples storage device;
Step e, after once complete total amount collection storage and analytical cycle T finish, the water sample in judgement waste water ratio samples storage device and the ratio of this samples storage device volume:
E-1 when described ratio is less than 10%, increases k value to be twice in next analytical cycle;
E-2 when described ratio is greater than 75%, lowers 10% by k value in next analytical cycle;
E-3, in continuous 3 total amount collection storages and analytical cycle T, described ratio is all no more than 40%, in next analytical cycle, k is increased to 20%; Other situations k value remains unchanged.
CN201110280585.3A 2011-09-21 2011-09-21 Method for determining sampling time and proportion coefficient based on wastewater discharging proportion Expired - Fee Related CN102507884B (en)

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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
CN108333317B (en) * 2017-12-30 2021-02-09 聚光科技(杭州)股份有限公司 Monitoring method for irregular emission pollution source
CN108287659B (en) * 2018-01-19 2021-09-10 北京奇艺世纪科技有限公司 Data sampling method and device based on real-time data stream and electronic equipment
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

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPS60100033A (en) * 1983-11-04 1985-06-03 Fuyo Kaiyo Kaihatsu Kk Measurement of water quality using 3-wavelength based volume dissipation coefficient
KR100247135B1 (en) * 1997-12-24 2000-06-01 김혜정 Potential of hydrogen analyzer of industry waste-water using robot and analyzer
WO2006043900A1 (en) * 2004-10-18 2006-04-27 Nanyang Technological University A water quality testing system
CN101261145A (en) * 2008-04-21 2008-09-10 东南大学 Water pollutant discharging gross amount intelligentized measurement method
CN201251568Y (en) * 2008-08-26 2009-06-03 上海雷磁环保工程有限公司 Wastewater on-line monitoring and sampling system
CN201251569Y (en) * 2008-08-26 2009-06-03 上海雷磁环保工程有限公司 On-line monitoring system of chemical oxygen demand

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60100033A (en) * 1983-11-04 1985-06-03 Fuyo Kaiyo Kaihatsu Kk Measurement of water quality using 3-wavelength based volume dissipation coefficient
KR100247135B1 (en) * 1997-12-24 2000-06-01 김혜정 Potential of hydrogen analyzer of industry waste-water using robot and analyzer
WO2006043900A1 (en) * 2004-10-18 2006-04-27 Nanyang Technological University A water quality testing system
CN101261145A (en) * 2008-04-21 2008-09-10 东南大学 Water pollutant discharging gross amount intelligentized measurement method
CN201251568Y (en) * 2008-08-26 2009-06-03 上海雷磁环保工程有限公司 Wastewater on-line monitoring and sampling system
CN201251569Y (en) * 2008-08-26 2009-06-03 上海雷磁环保工程有限公司 On-line monitoring system of chemical oxygen demand

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Inventor after: Zhou Xingpeng

Inventor after: Li Jing

Inventor after: Yuan Yizhi

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