CN106315978A - Method for treating low-salt preserved Szechuan pickle processing wastewater by cultivating Spirulina - Google Patents

Method for treating low-salt preserved Szechuan pickle processing wastewater by cultivating Spirulina Download PDF

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Publication number
CN106315978A
CN106315978A CN201610830923.9A CN201610830923A CN106315978A CN 106315978 A CN106315978 A CN 106315978A CN 201610830923 A CN201610830923 A CN 201610830923A CN 106315978 A CN106315978 A CN 106315978A
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Prior art keywords
waste water
spirulina
pickled mustard
less salt
hot pickled
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CN201610830923.9A
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CN106315978B (en
Inventor
李昌满
许明惠
许秀蓉
曾健
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Chongqing Xinghe Changhe Science & Technology Co Ltd
Yangtze Normal University
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Chongqing Xinghe Changhe Science & Technology Co Ltd
Yangtze Normal University
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Seasonings (AREA)

Abstract

The invention relates to a method for treating low-salt preserved Szechuan pickle processing wastewater. The method includes naturally precipitating the low-salt preserved Szechuan pickle processing wastewater for 6-12 hours, taking clarified liquor, boiling for 5-10 minutes and regulating a pH value to be 9-11.5 after cooling; mixing monopotassium phosphate with magnesium sulfate in a mass ratio of 1:1-1.2 to obtain an ammonia-reducing mixture, adding the mixture into the low-salt preserved Szechuan pickle processing wastewater obtained in previous step with stirring evenly, standing for 20-60 minutes and filtering to obtain filtrate; adding sodium bicarbonate into the filtrate to obtain a pretreated low-salt preserved Szechuan pickle processing wastewater solution, inoculating Spirulina platensis or Spirulina maxima into the pretreated low-salt preserved Szechuan pickle processing wastewater solution according to a conventional Spirulina cultivation method in the prior art and cultivating to enable the low-salt preserved Szechuan pickle processing wastewater quantity to reach the discharge standard after 15 days, wherein the Spirulina concentration OD560 ranges from 0.6-1.5 and the Spirulina inoculum size is 2.5-10 ml/L. The method is capable of treating the low-salt preserved Szechuan pickle processing wastewater at a low cost and enables the low-salt preserved Szechuan pickle processing wastewater to reach or approximate to the urban sewage discharge standards basically.

Description

Utilize the method that cultivating spirulina processes hot pickled mustard tube processing less salt waste water
Technical field
The present invention relates to food processing wastewater treatment technology, the particularly processing method of hot pickled mustard tube processing less salt waste water.
Background technology
Hot pickled mustard tube processing waste water includes pickling brine, eluriates saline, dehydration saline, desalination saline etc., at present, only Fu, Chongqing City Mound district year discharge all kinds of hot pickled mustard tube processing waste waters just to reach on 3,500,000 tons.Dehydration saline, secondary and three pickling brines belong to high salt and give up Water, has high salt high organic characteristic, and salinity is 15～30%, and COD is 5000～7500mg/L.High salt is processed for hot pickled mustard tube Waste water, the most existing multiple treatment technology, general physical chemistry or biological denitrificaion phosphorus and the COD technology of using, but there is equipment and throw Money is high, operation energy consumption high, without the problem of economic benefit, actual application is less.Pickling brine, elutriation saline and desalination saline belong to first Process less salt waste water in hot pickled mustard tube, have the advantages that less salt, low COD and generation amount are big, salinity 1～4%, COD 800～ 1500mg/L, typically constitutes from more than the 80% of hot pickled mustard tube processing waste water, as used physical chemistry or the biology of hot pickled mustard tube processing high-salt wastewater Technical finesse, processing cost is high.Therefore, current hot pickled mustard tube processing less salt waste water, usually used as direct discharging of waste water, not only causes Rivers body eutrophication, and cause farmland, rivers saline pollution so that environmental protection pressure increases.
Summary of the invention
It is an object of the invention to provide a kind of method utilizing cultivating spirulina to process hot pickled mustard tube processing less salt waste water, it is achieved low Become present treatment hot pickled mustard tube processing less salt waste water so that it is basically reach or close to urban sewage discharge standard.
The method utilizing cultivating spirulina to process hot pickled mustard tube processing less salt waste water of the present invention, comprises the following steps:
Step one, hot pickled mustard tube is processed less salt waste water natural sedimentation 6～12h, remove precipitation silt, obtain clear liquor；
Step 2, by step one gained hot pickled mustard tube processing less salt waste water boil 5～10 minutes, be cooled to room temperature；
The pH value of step 3, regulating step two gained hot pickled mustard tube processing less salt waste water is 9～11.5；
Step 4, potassium dihydrogen phosphate is mixed with magnesium sulfate 1:1 in mass ratio～1.2, obtain dropping ammonia mixture, by this fall Ammonia mixture adds in the hot pickled mustard tube processing less salt waste water of step 3 gained, stirs, stands 20～60 minutes, drops ammonia mixture It is 1～6:100 with the mass ratio of hot pickled mustard tube processing less salt waste water；
Step 5, by step 4 gained hot pickled mustard tube processing less salt waste water overanxious, filter off deposit, obtain filtrate；
Step 6, sodium bicarbonate is added in filtrate, obtain the hot pickled mustard tube processing less salt waste water solution of pretreatment, sodium bicarbonate It is 0.3～0.6:100 with the mass ratio of filtrate；
Step 7, by the conventional cultivation method of spirulina in prior art, process less salt waste water at step 6 gained hot pickled mustard tube Solution is inoculated spirulina plalensis or spirulina maxim, cultivates, algae kind concentration OD560Value is 0.6～1.5, and spirulina is inoculated Amount 2.5～10ml/L, after 15 days, hot pickled mustard tube processing less salt waste water quality i.e. can reach discharge standard.
The present invention utilizes spirulina to like salt characteristic, processes less salt waste water cultivating spirulina with hot pickled mustard tube, spirulina absorb and squeeze Dish the processing Organic substance of less salt waste water, nitrogen, phosphorus, salt, produce the spirulina raw material as spirulina processing enterprise simultaneously, reach Resource recycles.
Result of the test:
Pickling brine, three kinds of hot pickled mustard tubes processing less salt waste water such as elutriation saline and desalination saline etc. will use the present invention first respectively Described method processes, and for spirulina plalensis and the cultivation of spirulina maxim, its growth of spirulina platensis curve is as shown in Figure 1； Before and after using the method for the invention to process, hot pickled mustard tube processing less salt waste water quality is as shown in table 1.
Before and after table 1 processes, less salt waste water quality (unit: mg/L) processed by hot pickled mustard tube
In table 1, S1 represents spirulina plalensis, and S3 represents spirulina maxim.
Known to Fig. 1, spirulina plalensis and spirulina maxim pickle salt first after processing through the method for the invention In water, three kinds of hot pickled mustard tubes processing less salt waste water such as elutriation saline and desalination saline etc., upgrowth situation is good.
Compared with existing hot pickled mustard tube processing high-salt wastewater treatment technology, the invention have the advantages that
One, the low-salt environment of preserved szechuan pickle waste water is consistent with growth of spirulina platensis environmental demand, beneficially the growth of spirulina.
Two, the present invention is without special equipment, can directly utilize existing brine of pickled mustard tuber pond, also can build easy on-swimmer's pool, Need not multiple reaction tanks.
Three, pretreatment of the present invention only need to sterilize and add a small amount of chemicals treatment, and the cultivation phase only needs manually or electrically stir every day Mixing once, operating cost is low.
Four, the hot pickled mustard tube processing the highest removal rate of less salt waste water COD after using the method for the invention to process reaches more than 90%, Phosphorus removal rate is up to 76%, and inorganic nitrogen removal rate reaches 90～100%, basically reaches or close to urban sewage discharge standard.
Five, the by-product using the method for the invention to process hot pickled mustard tube processing less salt waste water is spirulina, can be as spiral The raw material of algae processing enterprise, hot pickled mustard tube per ton processing less salt waste water can produce about 5kg spirulina powder, therefore can produce direct warp Ji benefit, it is achieved that the resource recycling of waste water.
Accompanying drawing explanation
Fig. 1 is to use the method for the invention to carry out in the processing procedure of hot pickled mustard tube processing less salt waste water, the growth of spirulina Curve chart.
Wherein abscissa represents the cultivated days of spirulina, and vertical coordinate represents the OD of spirulina560Value.Curve 1 is blunt top spiral shell The growth curve chart that rotation algae is cultivated in desalination saline；Curve 11 is the growth curve that spirulina maxim is cultivated in desalination saline Figure；Curve 2 is the growth curve chart that spirulina plalensis is cultivated in eluriating saline；Curve 21 is that spirulina maxim is eluriating saline The growth curve chart of middle cultivation；Curve 3 is the growth curve chart that spirulina plalensis is cultivated in pickling brine first；Curve 31 is The growth curve chart that spirulina maxim is cultivated in pickling brine first.
Detailed description of the invention
Embodiment 1
Hot pickled mustard tube is processed less salt waste water natural sedimentation 12 hours, removes precipitation silt, obtain clear liquor, this clear liquor is boiled 10 minutes, after being cooled to room temperature, be 11.5 with potassium hydroxide regulation pH value；By potassium dihydrogen phosphate and magnesium sulfate 1:1 in mass ratio Mixing, obtains dropping ammonia mixture, is added by this fall ammonia mixture in the hot pickled mustard tube processing less salt waste water of aforementioned gained, drops ammonia mixture It is 6:100 with the mass ratio of aforementioned gained hot pickled mustard tube processing less salt waste water, stirs, by warp layer cloth mistake after standing 60 minutes Consider, filter off deposit, obtain filtrate；Sodium bicarbonate is added in this filtrate, sodium bicarbonate and the mass ratio of filtrate For 0.45:100, obtain the hot pickled mustard tube processing less salt waste water solution of pretreatment；By the conventional cultivation method of spirulina in prior art, The hot pickled mustard tube processing less salt waste water solution of gained pretreatment inoculates spirulina plalensis, cultivates, algae kind concentration OD560Value is 1.5, spirulina inoculum concentration 2.5ml/L, after 15 days, hot pickled mustard tube processing less salt waste water quality i.e. can reach discharge standard.
Embodiment 2
Hot pickled mustard tube is processed less salt waste water natural sedimentation 6 hours, removes precipitation silt, obtain clear liquor, this clear liquor is boiled 5 Minute, after being cooled to room temperature, it is 9 with potassium hydroxide regulation pH value；Potassium dihydrogen phosphate is mixed with magnesium sulfate 1:1.2 in mass ratio Close, obtain drop ammonia mixture, by this fall ammonia mixture add aforementioned gained hot pickled mustard tube processing less salt waste water in, fall ammonia mixture with The mass ratio of aforementioned gained hot pickled mustard tube processing less salt waste water is 1:100, stirs, overanxious with two layers of gauze after standing 20 minutes, Filter off deposit, obtain filtrate；Being added by sodium bicarbonate in this filtrate, sodium bicarbonate with the mass ratio of filtrate is 0.3:100, obtains the hot pickled mustard tube processing less salt waste water solution of pretreatment；By the conventional cultivation method of spirulina in prior art, in institute Obtain in the hot pickled mustard tube processing less salt waste water solution of pretreatment and inoculate spirulina maxim, cultivate, algae kind concentration OD560Value is 0.6, Spirulina inoculum concentration 10ml/L, after 15 days, hot pickled mustard tube processing less salt waste water quality i.e. can reach discharge standard.
Embodiment 3
Hot pickled mustard tube is processed less salt waste water natural sedimentation 8 hours, removes precipitation silt, obtain clear liquor, this clear liquor is boiled 7 Minute, after being cooled to room temperature, it is 10 with potassium hydroxide regulation pH value；Potassium dihydrogen phosphate is mixed with magnesium sulfate 1:1.1 in mass ratio Close, obtain drop ammonia mixture, by this fall ammonia mixture add aforementioned gained hot pickled mustard tube processing less salt waste water in, fall ammonia mixture with The mass ratio of aforementioned gained hot pickled mustard tube processing less salt waste water is 3:100, stirs, overanxious with three layers of gauze after standing 30 minutes, Filter off deposit, obtain filtrate；Being added by sodium bicarbonate in this filtrate, sodium bicarbonate with the mass ratio of filtrate is 0.6:100, obtains the hot pickled mustard tube processing less salt waste water solution of pretreatment；By the conventional cultivation method of spirulina in prior art, in institute Obtain in the hot pickled mustard tube processing less salt waste water solution of pretreatment and inoculate spirulina plalensis, cultivate, algae kind concentration OD560Value is 0.8, Spirulina inoculum concentration 5ml/L, after 15 days, hot pickled mustard tube processing less salt waste water quality i.e. can reach discharge standard.
Embodiment 4
Hot pickled mustard tube is processed less salt waste water natural sedimentation 10 hours, removes precipitation silt, obtain clear liquor, this clear liquor is boiled 8 minutes, after being cooled to room temperature, be 11 with potassium hydroxide regulation pH value；Potassium dihydrogen phosphate is mixed with magnesium sulfate 1:1 in mass ratio Close, obtain drop ammonia mixture, by this fall ammonia mixture add aforementioned gained hot pickled mustard tube processing less salt waste water in, fall ammonia mixture with The mass ratio of aforementioned gained hot pickled mustard tube processing less salt waste water is 5:100, stirs, overanxious with two layers of gauze after standing 45 minutes, Filter off deposit, obtain filtrate；Being added by sodium bicarbonate in this filtrate, sodium bicarbonate with the mass ratio of filtrate is 0.5:100, obtains the hot pickled mustard tube processing less salt waste water solution of pretreatment；By the conventional cultivation method of spirulina in prior art, in institute Obtain in the hot pickled mustard tube processing less salt waste water solution of pretreatment and inoculate spirulina maxim, cultivate, algae kind concentration OD560Value is 1.2, Spirulina inoculum concentration 8ml/L, after 15 days, hot pickled mustard tube processing less salt waste water quality i.e. can reach discharge standard.

Claims (1)

1. one kind utilizes the method that cultivating spirulina processes hot pickled mustard tube processing less salt waste water, it is characterised in that comprise the following steps:
Step one, hot pickled mustard tube is processed less salt waste water natural sedimentation 6～12h, remove precipitation silt, obtain clear liquor；
Step 2, by step one gained hot pickled mustard tube processing less salt waste water boil 5～10 minutes, be cooled to room temperature；
The pH value of step 3, regulating step two gained hot pickled mustard tube processing less salt waste water is 9～11.5；
Step 4, potassium dihydrogen phosphate is mixed with magnesium sulfate 1:1 in mass ratio～1.2, obtain dropping ammonia mixture, this fall ammonia is mixed Compound adds in the hot pickled mustard tube processing less salt waste water of step 3 gained, stirs, stands 20～60 minutes, fall ammonia mixture and squeezing The mass ratio of dish processing less salt waste water is 1～6:100；
Step 5, by step 4 gained hot pickled mustard tube processing less salt waste water overanxious, filter off deposit, obtain filtrate；
Step 6, sodium bicarbonate is added in filtrate, obtain the hot pickled mustard tube processing less salt waste water solution of pretreatment, sodium bicarbonate and mistake The mass ratio of filtrate is 0.3～0.6:100；
Step 7, by the conventional cultivation method of spirulina in prior art, process less salt waste water solution at step 6 gained hot pickled mustard tube Middle inoculation spirulina plalensis or spirulina maxim, cultivate, algae kind concentration OD560Value is 0.6～1.5, spirulina inoculum concentration 2.5～10ml/L, after 15 days, hot pickled mustard tube processing less salt waste water quality i.e. can reach discharge standard.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109880745A (en) * 2019-03-15 2019-06-14 江苏大学 A method of using pickling waste water, shining bittern water subsection filter salt algae
CN113736617A (en) * 2020-05-29 2021-12-03 中国石油化工股份有限公司 Open culture device and method for treating phosphorus-containing wastewater

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070101783A1 (en) * 2005-11-10 2007-05-10 Amit Gross Nitrogen extraction from organic wastes for fertigation in organic agriculture
CN105254036A (en) * 2015-11-24 2016-01-20 济南昊泽环保科技有限公司 Hot-pickled mustard tuber production wastewater treating agent and wastewater treating method
CN105819627A (en) * 2016-05-12 2016-08-03 杭州秀川科技有限公司 Treatment method for preserved szechuan pickle wastewater

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070101783A1 (en) * 2005-11-10 2007-05-10 Amit Gross Nitrogen extraction from organic wastes for fertigation in organic agriculture
CN105254036A (en) * 2015-11-24 2016-01-20 济南昊泽环保科技有限公司 Hot-pickled mustard tuber production wastewater treating agent and wastewater treating method
CN105819627A (en) * 2016-05-12 2016-08-03 杭州秀川科技有限公司 Treatment method for preserved szechuan pickle wastewater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109880745A (en) * 2019-03-15 2019-06-14 江苏大学 A method of using pickling waste water, shining bittern water subsection filter salt algae
CN113736617A (en) * 2020-05-29 2021-12-03 中国石油化工股份有限公司 Open culture device and method for treating phosphorus-containing wastewater
CN113736617B (en) * 2020-05-29 2023-07-14 中国石油化工股份有限公司 Open culture device and method for treating phosphorus-containing wastewater

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