CN103193358A - Comprehensive processing and utilization method of candied date processing wastewater - Google Patents
Comprehensive processing and utilization method of candied date processing wastewater Download PDFInfo
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- CN103193358A CN103193358A CN2012100004179A CN201210000417A CN103193358A CN 103193358 A CN103193358 A CN 103193358A CN 2012100004179 A CN2012100004179 A CN 2012100004179A CN 201210000417 A CN201210000417 A CN 201210000417A CN 103193358 A CN103193358 A CN 103193358A
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Abstract
The invention relates to a comprehensive processing and utilization method of candied date processing wastewater. According to the invention, candied date processing wastewater is subjected to a quality-differentiated processing method. High-sugar-content wastewater is subjected to multi-effect evaporation, such that sugar is recovered. Therefore, sewage processing load is greatly reduced, and considerable economic benefit can be produced with the recovered sugar. Date washing water, ground cleaning sewage, and other domestic sewage are gathered and processed, at the same time, coal-fired boiler flue gas desulfurization is performed. Bio-desulfurization is carried out with organic pollutants in the sewage as a nutrient source, sewage is also processed to a certain extent, and water temperature is increased, such that subsequent biochemical treatments are facilitated. Biochemical treatment outlet water is subjected to biochar deep processing, and is subjected to microfiltration and RO (reverse osmosis) double-membrane processing, such that outlet water salinity is reduced, and boiler softened water requirement is reached. Therefore, date processing wastewater discharge amount can be further reduced, and consumption and discharge of softening acid and alkali for traditional boiler water can be further reduced.
Description
Technical field
The present invention relates to the method for a kind of candied date (candied fruit) processing waste water comprehensive treating process and resource utilization, especially candied date processing waste water comprehensive treating process, honey reclaim the treatment process of coal firing boiler desulfurization and jujube processing waste water process integration.
Background technology
Jujube tree is one of the most ancient seeds in the Huanghe valley, apart from modern existing thousands of years cultivation history.Ground such as Hebei, Henan, Shanxi, Shaanxi, Xinjiang are China main jujube places of production.Candied date is the delicious snack food of tradition, and has abundant nutritive value, and huge market and good reputation are at home and abroad arranged.Candied date processing can improve agricultural product added value and drive local economy.But candied date processing also is an industry that pollution is bigger, and it is to perplex the difficult problem that enterprise further develops in a healthy way and faces that the hc effluent that candied date processing produces and production boiler smoke pollute always.Particularly the unrest row of some candied date processing individual workship factory effluents causes the great attention of surrounding enviroment pollution and environmental administration, makes the control of candied date (preserved fruit) processing pollution become the important topic of local environment Pollution abatement.
The candied date processing waste water mainly contains low concentration waste water such as Cleaning Wastewater, equipment and the ground wash-down water of former jujube and candied date through the hc effluent of candy post-flush surface molasses.The hc effluent main component is sugar, and except the small part reuse replenishes fresh water and the raw sugar to reduce, major part is drained.Wash-down water COD after candied date is candy is up to 190,000 (mg/L), through water drain with wash jujube water and ground, equipment cleaning water are mixed into the comprehensive wastewater that effluxes, its COD=60000mg/L.It is too high that so the direct processing of hc effluent certainly will cause investment, and enterprise is difficult to bear.
Winter temperature is lower, and the wastewater biochemical processing can be influenced by low water temperature.Lower water temperature must prolong waste water at the hydraulic detention time of handling (HRT), just needs to increase the volume for the treatment of facility.This measure must bring the significantly rising of wastewater treatment cost of investment, increases floor space.Utilizing used heat that waste water is heated up is a desirable terms of settlement.The dust-removal and desulfurizing of fire coal boiler fume has used heat to utilize, but traditional wastewater treatment and desulfurization are two independently systems, is difficult to utilize the used heat of flue gas desulfurization to reach the purpose of the processed waste water of heating.
Acid rain and sulfurous gas (SO
2)It is the principal character of China's topsoil.Subdue SO
2Quantity discharged is control topsoil main path.
Coal-fired back flue gas desulfurization (FGD) technology that accounts for main flow at present is to be the wet process of FGD of sweetening agent with Wingdale or lime, belongs to the chemical method desulfurization.Its principle of work is the SO in the emulsion absorption flue gas that adopts Wingdale or lime
2, generate calcium sulfate or gypsum, this technical development maturation, the desulfuration efficiency height can reach 90%, and its equipment accounts for and builds up 83.7% of flue gas desulfurization (FGD) unit.
There are a lot of not enough parts in the desulfurization of wet process of FGD method:
1, wet process of FGD is with SO
2Transfer in the solid phase calcium sulfate, and the utility value of calcium sulfate is not high, causes the difficulty of recycling or remarketing;
2, the employing Wingdale is that the most serious problem of wet desulphurization of sweetening agent is fouling and the obstruction of gypsum, is the major cause that causes desulfuration absorber to stop work;
3, the fouling in the desulphurization system and deposition obstruction, wearing and tearing, corrosion and the systemic resistance that can cause pipeline increases, and increases investment cost and running cost;
4, the influence factor of FGD system reliability mainly contains factor such as flue gas condition, absorbent properties, boiler operating state and operator to the awareness of FGD operation and grasp level etc., the wet process of FGD technology needs the high maintenance cost because of its complicated process.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, provide the comprehensive treating process of a kind of candied date processing waste water, honey to reclaim the treatment process of coal firing boiler desulfurization and jujube processing waste water process integration.
The present invention adopts branch matter to handle the candied date processing waste water, and high sucrose-containing wastewater reclaims sugar by multiple-effect evaporation, not only significantly alleviates the sewage disposal load but also produce to reclaim sugared considerable economic; Jujube rinse water, floor cleaning sewage and other sanitary sewage aggregation process; This part of contaminated water is handled and coal burning flue gas desulfurization synchronous operation, and when utilizing the organic pollutant biological desulphurization in the sewage, processing, water temperature that sewage also obtains to a certain degree rise---favourable follow-up biochemical treatment.
A kind of comprehensive treating process of candied date processing waste water and method of resource the steps include:
(1) candy candied date flushing waste water is collected separately, sends into multi-effect evaporation system, is concentrated into to satisfy the candy concentration of candied date and replace candy fresh water and corresponding minimizing raw sugar dosage;
(2) low density wastewater during such as jujube cleaning is delivered to the biological desulphurization unit and (has been granted patent, dispatch sequence number: 2011090100099050, number of patent application: 200910070029.6), utilize the pollutent in the organic waste water to be nutrition source, supply with the microbial metabolism energy, microorganism alkalescence meta-bolites absorbs, in and the SO in the flue gas
2And utilize the katalysis of microbial enzyme with the SO of absorption
2Be oxidized to sulfate radical;
(3) when realizing high desulfurization efficiency, chroma in waste water, COD have bigger clearance;
(4) utilize the used heat of flue gas, the waste water water temperature can rise to about 30 ℃, the waste water after heating up is pumped to treatment unit for waste water again carries out anaerobic-aerobic and handle;
(5) above-mentioned biochemical treatment water outlet is handled through micro-filtration and the two films of RO reverse osmosis through the biological carbon advanced treatment again, reduce salinity water and reach boiler softening water requirement boiler of feeding, further reduce candied date processing waste water quantity discharged and conventional boiler with consumption and the discharging of water softening soda acid.
Advantage of the present invention and positively effect are:
1, candy candied date flushing waste water is collected separately, be concentrated into through multiple-effect evaporation and satisfy fresh water and the corresponding minimizing raw sugar dosage that the candy concentration of candied date replaces candy need to replenish, reclaim sugared amount and can reach about 10% of this part hc effluent total amount, reduce the comprehensive wastewater treatment capacity and handle load;
Available energy----in the low density wastewater durings such as 2, flue gas and jujube cleaning, equipment washing in the flue gas heat and waste water in microorganism can utilize nutrition, make waste gas, two unit of wastewater treatment become the integral process of combination treatment, the energy of two processing units complements each other, utilizes mutually, realizes waste water, flue gas synchronous processing;
3, the biological desulphurization decreasing ratio of SO 2 from fume reaches more than 90%, because the difference of wastewater biodegradability, COD can reach the different clearance of 20%-30% with chroma removal rate;
4, the direct working cost of biological desulphurization only is that the pump of sweetening process waste water promotes energy consumption cost, and has facility compact, takes up an area of characteristics little, easy and simple to handle, stable, non-secondary pollution;
5, the thionizer water outlet still is the alkalescence of pH＞7, enters the effect that the flue gas ash removal tower can play cooling and preliminary desulfurization;
When 6, realizing flue gas desulfurization the low density wastewater during of part is to a certain degree handled therewith, the desulfurization unit leaving water temperature(LWT) can rise to 25-35 ℃ of suitable follow-up biochemical treatment in the winter time;
7, through desulfurization, the temperature that waste water enters the biochemical treatment unit is suitable, can significantly reduce the biochemical treatment of waste water tradition for the reply winter operation need increase hydraulic detention time, strengthens biochemical processing device and drops into;
8, the low density wastewater during of candied date processing is through flue gas desulfurization and biochemical treatment, handle by micro-filtration and the two films of RO reverse osmosis through the water outlet of biological carbon advanced treatment again, go out salinity water and can reach the requirement of boiler softening water, the boiler of feeding water, further reduce jujube processing waste water quantity discharged and conventional boiler water by consumption and the discharging of ion-exchange acquisition softening water soda acid salt, will reduce the discharging of polluting total amount.
Embodiment
Below in conjunction with specific embodiment, the present invention is further described, and it is illustrative that the subordinate implements, and is not determinate, can not limit protection scope of the present invention with following embodiment.
A kind of comprehensive treating process of candied date processing waste water and method of resource the steps include:
(1) candy candied date flushing waste water is collected through multiple-effect evaporation separately, is concentrated into to satisfy fresh water and the corresponding minimizing raw sugar dosage that the candy concentration of candied date replaces candy need to replenish;
(2) low density wastewater during such as jujube cleaning is delivered to the biological desulphurization unit, utilizes the pollutent in the organic waste water to be nutrition source, supplies with desulfurization microbial metabolism energy, microorganism alkalescence meta-bolites absorbs, in and the SO in the flue gas
2And utilize the katalysis of microbial enzyme with the SO of absorption
2Be oxidized to sulfate radical;
(3) when realizing high desulfurization efficiency, chroma in waste water, COD have bigger clearance;
(4) utilize the used heat of flue gas, the waste water water temperature can rise to about 30 ℃, the waste water after heating up is pumped to treatment unit for waste water again carries out anaerobic-aerobic and handle;
(5) after follow-up advanced treatment and two embrane method desalination, water quality reaches the standard of boiler softening water, is back to use boiler, reduces acid and alkali consumption and discharging that fresh water consumption and traditional softening water process cause.
Candied date processing waste water branch matter is handled and comprehensive utilization can fundamentally solve candied date (preserved fruit) the processing produced pollution.The benefit that the multiple-effect evaporation of high dense molasses containing waste water produces and the ratio of working cost were up to 10: 1.And biological desulphurization utilize in the low density wastewater during such as candied date processing jujube cleaning can biochemical pollutent as the nutrition source of special efficient Alcaligenes, produces enough basicity, absorb with in and sulfur in smoke, make the gas cleaning emission compliance.The consumption of these pollutents also is the treating processes of waste water, and desulfurization realizes waste water processing to a certain degree synchronously.Because waste water has absorbed the used heat of flue gas simultaneously, the water temperature that waste water is discharged desulfurization unit can rise to about 30 ℃, solved winter waste water water temperature and crossed a low difficult problem that causes for biochemical treatment, made in fume waste heat, the waste water and can biochemical pollutent reach utilization to greatest extent.The present invention makes candied date (preserved fruit) processing waste water treating processes become utilization of waste as resource--the process of the recovery of-honey, flue gas desulfurization, sewage disposal and reuse.
This application has realized the industrialization operation of 10T/h coal firing boiler biological desulphurization and 500T/d municipal wastewater process integration and has finished the design of the high sugared multiple-effect evaporation of 25T/d, 40T/d jujube Cleaning Wastewater and 4T/h coal firing boiler biological desulphurization cooperation.The present invention also is applicable to comprehensive treating process and the resource utilization of other fruit preserved fruit processing waste waters.
Claims (7)
1. hc effluent such as candy candied date flushing is collected separately, is concentrated into through multiple-effect evaporation and satisfies the candy concentration of candied date, the fresh water and the corresponding minimizing raw sugar dosage that replace candy need to replenish;
Available energy----in the low density wastewater during such as fire coal boiler fume and jujube cleaning in the flue gas heat and waste water in microorganism can utilize the complementation utilization of nutrition, waste gas, two unit of wastewater treatment become the integral process of combination treatment, the energy complement utilization of two processing units, waste water, flue gas are realized synchronous processing;
3. the biological desulphurization decreasing ratio of SO 2 from fume reaches more than 90%, because the difference of wastewater biodegradability, COD and chroma removal rate reach 20%-30%;
4. the thionizer water outlet still is the alkalescence of pH＞7, enters the effect that the flue gas ash removal tower can play cooling and preliminary desulfurization;
5. when realizing flue gas desulfurization and providing the waste water that produces alkali microbial nutrition source to a certain degree to handle, the desulfurization unit leaving water temperature(LWT) can rise to 25-35 ℃ of suitable follow-up biochemical treatment in the winter time;
6. through desulfurization, the temperature that waste water enters the biochemical treatment unit is suitable, can reduce the hydraulic detention time of waste water tradition biochemical treatment winter operation, reduces traditional biochemical processing device and drops into;
7. handle through micro-filtration and the two films of RO reverse osmosis again through the water outlet of flue gas desulfurization, low density wastewater during biochemical treatment and biological carbon advanced treatment, reduce and salinity water and reach the requirement of boiler softening water, the boiler of feeding water further reduces consumption and the discharging of the softening water soda acid of candied date processing waste water quantity discharged and conventional boiler.
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| CN2012100004179A CN103193358A (en) | 2012-01-05 | 2012-01-05 | Comprehensive processing and utilization method of candied date processing wastewater |
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|---|---|---|---|
| CN2012100004179A CN103193358A (en) | 2012-01-05 | 2012-01-05 | Comprehensive processing and utilization method of candied date processing wastewater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695352A (en) * | 2013-12-17 | 2014-04-02 | 宋青春 | Method for manufacturing water-quality treating agent specific to waste water of Chinese date processing plant by adopting microbial fermentation process |
| CN104026507A (en) * | 2014-06-16 | 2014-09-10 | 河北欧亚匡食品集团有限公司 | Method for producing Chinese date fruit by utilizing waste preserved date liquid glucose |
| CN105925515A (en) * | 2016-07-14 | 2016-09-07 | 贝嘉美（天津）生物技术研发有限公司 | Method for culturing lactic acid bacteria by using candied jujube wastewater as medium |
| CN110526396A (en) * | 2019-07-24 | 2019-12-03 | 华电电力科学研究院有限公司 | A kind of desulfurization wastewater and sanitary sewage Coordination Treatment technique and its integrated apparatus |
| CN110902916A (en) * | 2019-11-12 | 2020-03-24 | 内蒙古科迈化工有限公司 | Phthalimide wastewater recycling process |
-
2012
- 2012-01-05 CN CN2012100004179A patent/CN103193358A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695352A (en) * | 2013-12-17 | 2014-04-02 | 宋青春 | Method for manufacturing water-quality treating agent specific to waste water of Chinese date processing plant by adopting microbial fermentation process |
| CN104026507A (en) * | 2014-06-16 | 2014-09-10 | 河北欧亚匡食品集团有限公司 | Method for producing Chinese date fruit by utilizing waste preserved date liquid glucose |
| CN105925515A (en) * | 2016-07-14 | 2016-09-07 | 贝嘉美（天津）生物技术研发有限公司 | Method for culturing lactic acid bacteria by using candied jujube wastewater as medium |
| CN110526396A (en) * | 2019-07-24 | 2019-12-03 | 华电电力科学研究院有限公司 | A kind of desulfurization wastewater and sanitary sewage Coordination Treatment technique and its integrated apparatus |
| CN110902916A (en) * | 2019-11-12 | 2020-03-24 | 内蒙古科迈化工有限公司 | Phthalimide wastewater recycling process |
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Application publication date: 20130710 |