CN101699261A - Method for monitoring suspended solid SS in sludge water of water treatment plant - Google Patents
Method for monitoring suspended solid SS in sludge water of water treatment plant Download PDFInfo
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- CN101699261A CN101699261A CN200910232888A CN200910232888A CN101699261A CN 101699261 A CN101699261 A CN 101699261A CN 200910232888 A CN200910232888 A CN 200910232888A CN 200910232888 A CN200910232888 A CN 200910232888A CN 101699261 A CN101699261 A CN 101699261A
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Abstract
The invention provides a method for monitoring suspended solid SS in sludge water of a water treatment plant, and relates to a quick water quality monitoring method for the suspended solid SS in the sludge water of each unit treatment structure. The suspended solid SS in the sludge water is changed along with the change of sludge concentration and turbidity; and by measuring the sludge concentration and turbidity of the sludge water in different stages and fitting a relation of SS and sludge concentration and turbidity change through a mathematic equation, the method realizes monitoring the SS of the sludge water of the each unit treatment structure timely. The relation of the sludge water and the sludge concentration and turbidity can be shown by the following formulas: when the sludge concentration is more than 2g/L, SS=alebx; when the sludge concentration is more than or equal to 0.5g/L and less than or equal to 2g/L, SS=a2x; and when the sludge concentration is less than 0.5g/L, SS=cy. The indexes required to be monitored are simple; the operation is convenient and quick; and the method is suitable for timely monitoring the SS of the sludge water of each unit structure of the water treatment plant, contributes to accurately adjusting and controlling sludge discharge operating condition and sludge treatment condition, and ensures the effluent quality of the water treatment plant.
Description
Technical field
The present invention relates to a kind of water quality monitoring method, the fast monitored that is specifically related to water treatment plant's flocculation, precipitation and filters structures spoil disposal water water quality suspended sediment concentration SS.
Background technology
Water treatment plant meets the potable water while of drinking water sanitary standard in production, also produced a large amount of production spoil disposal water, mainly from flocculation basin, the spoil disposal of settling basin (clarifying basin) and the back flush in filter tank, its water yield generally accounts for 4%～7% of water treatment plant's Total Water to these spoil disposal water.Good spoil disposal operating condition is not only the important measures that guarantee water treatment plant's effluent quality, and water factory's water saving is subtracted dirt has material impact.The water-quality guideline SS of reflection spoil disposal aqueous suspension solids content is meant the main control parameters of water guide factory spoil disposal operating condition and water factory's spoil disposal technological design.For many years, because this index determining length consuming time, China moves the actual motion SS parameter that most of water treatment plants all lack spoil disposal water at present, the only adjusting by rule of thumb of spoil disposal operating mode; Water factory's spoil disposal technological design, owing to lack the actual motion SS data of water factory's spoil disposal water, to apply mechanically external formula and parameter basically and carry out calculation Design, engineering is gone into operation after the operation, often there is bigger difference in design conditions with actual conditions, bring the many constant of operational management.By using the monitoring method of spoil disposal water SS of the present invention, can in time grasp the SS of each unit structures spoil disposal water of water treatment plant, help accurate adjusting, control spoil disposal operating condition and Treatment of Sludge operating mode, guarantee water treatment plant's effluent quality.
Summary of the invention
Goal of the invention:
The objective of the invention is to use portable sludge concentration instrument and portable turbidimeter to measure the SS of spoil disposal water fast, help accurately to regulate the spoil disposal operating condition of each cell processing structures of water treatment plant and the Treatment of Sludge operating mode of water treatment plant, guarantee water treatment plant's effluent quality.
Technical scheme:
The present invention adopts following technical scheme for achieving the above object:
Determining of the spoil disposal aqueous suspension solid concentration SS monitoring method sludge concentration interval of A, water treatment plant: according to the SS corresponding relation different of each cell processing structures spoil disposal water of water treatment plant with existing of sludge concentration and turbidity, be divided into three intervals by sludge concentration: high concentration, i.e. sludge concentration＞2g/L; Middle concentration, i.e. 0.5g/L≤sludge concentration≤2g/L; Low concentration, sludge concentration＜0.5g/L.
B, for the different sludge concentrations of the spoil disposal water of different cell processing structures, select following formula respectively, determine correlationship:
1. when sludge concentration be high concentration, promptly during sludge concentration＞2g/L, SS=a
1e
Bx
2. when sludge concentration be middle concentration, promptly during 0.5g/L≤sludge concentration≤2g/L, SS=a
2X;
3. when sludge concentration be middle concentration, promptly during sludge concentration＜0.5g/L, SS=cy;
SS is suspended sediment concentration (mg/L) in the formula, and x is sludge concentration (g/L), and y is turbidity (NTU), a
1, a
2, b is the coefficient of relationship of sludge concentration and SS; C is the coefficient of relationship of SS and turbidity.
The SS of the cell processing structures spoil disposal water of C, different water source water treatment plant and the coefficient of relationship of sludge concentration and turbidity are determined:
Step a, get the production spoil disposal water of each cell processing structures of water treatment plant respectively, under the uniform condition of water sample, measure the sludge concentration of water sample respectively, determine that each cell processing structures produces the water sample concentration stage of spoil disposal water with the sludge concentration instrument;
Step b, for high, middle concentration interval, i.e. sludge concentration＞2g/L and 0.5g/L≤sludge concentration≤2g/L, it is definite to adopt the sludge concentration instrument to carry out the coefficient of relationship of SS and sludge concentration; For between low concentration region, i.e. sludge concentration＜0.5g/L, it is definite to adopt turbidimeter to carry out the coefficient of relationship of SS and turbidity;
Step c, get the spoil disposal water 20L of unit structures, quiescent setting 2h, precipitation separation mud and supernatant, and it is stand-by to take out supernatant;
Steps d, with the supernatant that separates among the step c by the precipitating sludge among different sludge concentrations or the turbidity dilution step c, be mixed with the spoil disposal water of different sludge concentrations or different turbidity and write down corresponding sludge concentration or turbidity, use gravimetric method (GB11901-89) to measure the SS value of sludge concentration or turbidity correspondence simultaneously;
The data of step e, SS～sludge concentration that steps d is obtained or SS～turbidity are carried out the numerical fitting of coefficient of relationship by the relational expression of spoil disposal water SS and sludge concentration and turbidity, draw a
1, b; a
2Or the value of c.
Described coefficient of relationship a
1, a
2, b, c variation range be: for water source, the Changjiang river: a
1Change between 1400～2600, b changes between 0.12～0.18; a
2Between 800～1000, change; C changes between 1.3～1.5.
Beneficial effect:
The present invention detects by the spoil disposal water concentration or the turbidity of simple operation, utilizes the math equation The Fitting Calculation to realize length consuming time, the spoil disposal water SS monitoring that error at measurment is big.This method can in time be carried out monitoring analysis to each unit structures spoil disposal water SS of water treatment plant, helps to regulate and accurate control spoil disposal operating condition, guarantees water treatment plant's effluent quality, water saving is subtracted dirt play facilitation, and is specific as follows:
1., utilization portable sludge concentration instrument and portable turbidimeter measure the SS of waterworks spoil disposal water, avoided red tapes such as water intaking, filtration, oven dry;
2., this method on-site measurement is single can finish, and has saved human resources, low operation cost, economic feasibility is higher;
3., this method can be applied to the mensuration of any waterworks spoil disposal water SS, and is easy and simple to handle, be easy to realize.
Description of drawings
Fig. 1 is a method flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
Monitoring place: Nanjing city tap-water factory
Water factory's water purification treatment technology: the Changjiang river Yuan Shui → clarification → filtration → sterilization → output water
Cell processing structures spoil disposal water is from clarifying basin, V-type filter tank
Determining of the spoil disposal aqueous suspension solid concentration SS monitoring method sludge concentration interval of A, water treatment plant:
The spoil disposal water in clarifying basin, V-type filter tank takes a morsel, stirring keeps evenly water sample, measure sludge concentration with portable sludge concentration instrument, the clarifying basin sludge concentration is about 16g/L＞2g/L is between high concentration region, V-type filter tank gas dash and air water in the spoil disposal sewage sludge concentration of dashing be that 1.5g/L left and right sides ∈ 0.5g/L≤sludge concentration≤2g/L is middle concentration interval, the sludge concentration＜0.5g/L of the spoil disposal water that water dashes is between low concentration region.
B, selection clarifying basin and V-type filter tank SS relational expression:
1. clarifying basin spoil disposal water, SS=a
1e
Bx
2. V-type filter tank gas dashes, air water is towards spoil disposal water, SS=a
2X;
3. V-type filter tank water is towards spoil disposal water, SS=cy;
SS is suspended sediment concentration (mg/L) in the formula, and x is sludge concentration (g/L), and y is turbidity (NTU), a
1, a
2, b is the coefficient of relationship of sludge concentration and SS; C is the coefficient of relationship of SS and turbidity.
C, be that the SS of cell processing structures spoil disposal water of water source water treatment plant and the coefficient of relationship of sludge concentration and turbidity are determined with the Changjiang river:
Step a, get the spoil disposal water 20L in clarifying basin, V-type filter tank respectively, quiescent setting 2h, precipitation separation mud and supernatant, and it is stand-by to take out supernatant;
Step b, with the supernatant that separates among the step a by the precipitating sludge among different sludge concentrations or the turbidity dilution step a, be mixed with the spoil disposal water of different sludge concentrations or different turbidity and write down corresponding sludge concentration or turbidity, use gravimetric method (GB11901-89) to measure the SS value of sludge concentration or turbidity correspondence simultaneously;
The data of step c, SS～sludge concentration that step b is obtained or SS～turbidity are carried out the numerical fitting of math equation coefficient of relationship, draw a
1, b; a
2Or the value of c.
Clarifying basin spoil disposal water SS value is determined and verification msg sees Table 1 respectively, table 2: and high concentration (sludge concentration＞2g/L)
Table 1 clarifying basin spoil disposal water SS～sludge concentration coefficient of relationship is determined table
| Concentration meter reading (g/L) | ??19.9 | ??19 | ??17.9 | ??16.7 | ??15.8 | ??14.2 | ??13.3 | ??12 |
| ??SS(mg/L) | ??34212 | ??29248 | ??23263 | ??19942 | ??18483 | ??14498 | ??13325 | ??11923 |
| Concentration meter reading (g/L) | ??10.7 | ??9.4 | ??8.3 | ??7.2 | ??6.2 | ??5.2 | ??4.3 | ??3.3 |
| ??SS(mg/L) | ??10099 | ??8767 | ??7494 | ??6841 | ??6166 | ??4993 | ??4504 | ??3559 |
Can get the relational expression of sludge concentration instrument reading (x) and SS by last table:
SS＝2381e
0.14x(mg/L)，?????????R
2＝0.9952
Work as a
1Get 2381, b got 0.14 o'clock, its correlativity is good.
Table 2 clarifying basin spoil disposal water SS check table
| Sample time (s) | Concentration meter reading (g/L) | ??SS(mg/L) | Calculate SS value (mg/L) | Difference (mg/L) |
| ??0 | ??18.3 | ??27269 | ??30858 | ??-3589 |
| ??30 | ??16.4 | ??24725 | ??23572 | ??1156 |
| ??60 | ??16.1 | ??22936 | ??22620 | ??316 |
Through on-site measurement (table 2) check, calculate SS value and on-site measurement SS error in ± 4000mg/L, owing to clarifying basin spoil disposal water concentration is very high, so can reflect truth.
V-type filter tank spoil disposal water SS value is determined and verification msg sees Table 3～table 6 respectively:
1. gas dashes, air water is towards spoil disposal water: and middle concentration (0.5g/L≤sludge concentration≤2g/L)
Table 3V type filter tank gas dashes, air water is determined table towards spoil disposal water SS～sludge concentration coefficient of relationship
| Concentration meter reading (g/L) | ??2.0 | ??1.7 | ??1.4 | ??1.1 | ??0.8 | ??0.5 |
| ??SS(mg/L) | ??1970 | ??1688 | ??1452 | ??1085 | ??786 | ??532 |
Can get the relational expression of sludge concentration instrument reading (x) and SS by last table:
SS＝977x(mg/L)??????????R
2＝0.9971
Work as a
2Got 977 o'clock, its correlativity is good.
Table 4V type filter tank gas dashes, air water is towards spoil disposal water SS check table
Through on-site measurement (table 4) check, calculate SS value and on-site measurement SS error in ± 200mg/L, so can reflect truth.
2. water is towards spoil disposal water: and low concentration (sludge concentration＜0.5g/L)
Table 5V type filter tank water is determined table towards spoil disposal water SS～sludge concentration coefficient of relationship
| Turbidimeter reading (NTU) | ??309 | ??224 | ??174 | ??147 | ??112 | ??97.8 | ??82.3 |
| ??SS(mg/L) | ??505 | ??363 | ??246 | ??203 | ??157 | ??142 | ??114 |
| Turbidimeter reading (NTU) | ??67.9 | ??51.9 | ??37 | ??20.9 | ??13.3 | ??6.05 | ??5 |
| Turbidimeter reading (NTU) | ??309 | ??224 | ??174 | ??147 | ??112 | ??97.8 | ??82.3 |
| ??SS(mg/L) | ??100 | ??68 | ??49 | ??26 | ??22 | ??8 | ??3 |
Can get the relational expression of V-type filter tank spoil disposal water turbidity y and SS by last table:
SS＝1.4y(m/L)????R
2＝0.9953
When c got 1.4, its correlativity was good.
Table 6V type filter tank water is towards spoil disposal water SS check table
Through on-site measurement (table 6) check, calculate SS value and on-site measurement SS value error at ± 30mg/L, so can reflect truth.
Claims (3)
1. the spoil disposal aqueous suspension solid concentration SS monitoring method of a water treatment plant, it is characterized in that: the sludge concentration and the turbidity of spoil disposal water change along with the variation of SS, the sludge concentration by different units being handled structures spoil disposal operating mode and the mensuration of turbidity can realize monitoring the spoil disposal water SS of each cell processing structures, and the relation of spoil disposal water SS and sludge concentration and turbidity can be represented by the formula:
1. when sludge concentration be high concentration, promptly during sludge concentration＞2g/L, SS=a
1e
Bx
2. when sludge concentration be middle concentration, promptly during 0.5g/L≤sludge concentration≤2g/L, SS=a
2X;
3. when sludge concentration be low concentration, promptly during sludge concentration＜0.5g/L, SS=cy;
SS is suspended sediment concentration (mg/L) in the formula, and x is sludge concentration (g/L), and y is turbidity (NTU), a
1, a
2, b is the coefficient of relationship of sludge concentration and SS; C is the coefficient of relationship of SS and turbidity.
2. the spoil disposal aqueous suspension solid concentration SS monitoring method of water treatment plant according to claim 1 is characterized in that: described coefficient of relationship a
1, a
2, b, c variation range be: when spoil disposal water is the water source, the Changjiang river, a
1Change between 1400～2600, b changes between 0.12～0.18; a
2Between 800～1000, change; C changes between 1.3～1.5.
3. the spoil disposal aqueous suspension solid concentration SS monitoring method of water treatment plant according to claim 1 and 2, it is characterized in that: the coefficient of relationship determining step of the SS of spoil disposal water and sludge concentration and turbidity is as follows:
Step a, get the production spoil disposal water of each cell processing structures of water treatment plant respectively, under the uniform condition of water sample, measure the sludge concentration of water sample respectively, determine that each cell processing structures produces the water sample concentration interval of spoil disposal water with the sludge concentration instrument;
Step b, for high, middle concentration interval, i.e. sludge concentration＞2g/L and 0.5g/L≤sludge concentration≤2g/L, it is definite to adopt the sludge concentration instrument to carry out the coefficient of relationship of SS and sludge concentration; For between low concentration region, i.e. sludge concentration＜0.5g/L, it is definite to adopt turbidimeter to carry out the coefficient of relationship of SS and turbidity;
Step c, get the spoil disposal water 20L of unit structures, quiescent setting 2h, precipitation separation mud and supernatant, and it is stand-by to take out supernatant;
Steps d, with the supernatant that separates among the step c by the precipitating sludge among different sludge concentrations or the turbidity dilution step c, be mixed with the spoil disposal water of different sludge concentrations or different turbidity and write down corresponding sludge concentration or turbidity, use gravimetric method (GB11901-89) to measure the SS value of sludge concentration or turbidity correspondence simultaneously;
The data of step e, SS～sludge concentration that steps d is obtained or SS～turbidity are carried out the numerical fitting of coefficient of relationship by the relational expression of spoil disposal water SS and sludge concentration and turbidity, draw a
1, b; a
2Or the value of c.
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|---|---|---|---|
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957303A (en) * | 2010-09-19 | 2011-01-26 | 浙江华友钴业股份有限公司 | Method for analyzing turbidity of colored solution |
| CN104614274A (en) * | 2013-11-05 | 2015-05-13 | 中蓝连海设计研究院 | Method for determining MLSS in high salinity biochemical system |
| CN114291905A (en) * | 2021-12-07 | 2022-04-08 | 上海沁沿环保技术有限公司 | Operation diagnosis method and diagnosis system of microbial sewage treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1884113A (en) * | 2006-07-10 | 2006-12-27 | 哈尔滨工业大学 | Process for treating low turbidity water |
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2009
- 2009-10-21 CN CN2009102328880A patent/CN101699261B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957303A (en) * | 2010-09-19 | 2011-01-26 | 浙江华友钴业股份有限公司 | Method for analyzing turbidity of colored solution |
| CN104614274A (en) * | 2013-11-05 | 2015-05-13 | 中蓝连海设计研究院 | Method for determining MLSS in high salinity biochemical system |
| CN114291905A (en) * | 2021-12-07 | 2022-04-08 | 上海沁沿环保技术有限公司 | Operation diagnosis method and diagnosis system of microbial sewage treatment system |
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