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Treatment method of preserved mustard wastewater

A technology of pickled mustard wastewater and treatment methods, which is applied in the direction of food industry wastewater treatment, water/sewage treatment, water treatment parameter control, etc., and can solve the problem of reduced stability and reliability of biochemical treatment equipment, short duration of bioaugmentation effect, and inapplicability Mustard mustard wastewater treatment and other issues have achieved the effect of achieving stable and up-to-standard discharge, realizing resource utilization, and realizing resource exchange and utilization

Pending Publication Date: 2021-04-09
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the salinity of pickled mustard wastewater is 3.5-5.0%, the removal effect of organic matter and ammonia nitrogen is still good. With the increase of salinity, the added bacterial agent is easy to be lost or degraded, and the maintenance time of the bioaugmentation effect is short. The efficiency is significantly reduced and cannot be applied to the treatment of pickled mustard wastewater
[0004] When using this method to treat mustard mustard wastewater, in order to ensure microbial activity, a large amount of tap water has to be used to dilute the salinity of 12% to 1.5%-2%. Inhibited or even dead, resulting in reduced stability and reliability of biochemical processing equipment

Method used

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  • Treatment method of preserved mustard wastewater

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Embodiment 1

[0063] Adopt the present invention to process the mustard mustard wastewater of a mustard mustard factory in Fuling, Chongqing according to the above steps, and the COD and NH in the mustard mustard wastewater 4 + -N and SS water quality are 14380~14410, 441~453 and 218~230mg / L respectively, and the salinity is 7%;

[0064] Through the grille, go to the adjustment tank to adjust the pH of the solution to 6.5-8.5, enter the circulating reaction tank for bioaugmentation treatment, and activate the halophilic bacteria agent (5%-10% inoculum) liquid to expand culture, add medium to make it grow to the optimal concentration) 3d, set HRT=12h sequential batch type intermittent water change, drainage ratio is 1 / 3, aeration intensity is 1000L / h, sludge concentration is 3200mb / L; after coagulation, flocculation, and sedimentation treatment, the coagulation and flocculation residence time is set to 0.7h, the dosage of coagulant is 70mg / L, and the dosage of flocculation is 4mg / L, and th...

Embodiment 2

[0070] According to the above steps, the present invention is used to treat the mixed liquid of comprehensive waste water and pickled mustard waste water produced in the production process of a mustard plant in Banan District, Chongqing City, and then the mixed liquid passes through a high-salt mustard waste water pretreatment device, an electrodialyzer, and a UASB in sequence. After the reactor, the final effluent can meet the discharge standard, and the specific treatment conditions are shown in Table 2.

[0071] Table 2

[0072]

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Abstract

The invention discloses a treatment method of preserved mustard wastewater, which comprises the steps of 1) filtering high-salt preserved mustard wastewater through a solid-liquid separation unit, enabling waste liquid to enter an adjusting unit, and adjusting the pH value of the waste liquid to 6.5-8; 2) enabling the waste liquid to enter a circular reaction tank to remove organic matters, ammonia nitrogen, total nitrogen and total phosphorus in the waste liquid; 3) enabling effluent circularly treated by the circular reaction tank to enter a coagulating sedimentation unit for precipitating insoluble organic matters and fine particle suspended matters in the waste liquid; 4) enabling effluent treated by the coagulating sedimentation unit to enter an electrodialysis treatment unit, and separating sodium ions and chloride ions of NaCl in the waste liquid by adopting a membrane separation method to reduce the salinity of the waste liquid; and (5) enabling the effluent of the electrodialysis treatment unit to enter an anaerobic digestion treatment unit, enabling anaerobic microorganism compound strains added into the waste liquid to be in full contact with the waste liquid, and then discharging. After the suspended organic matters and inorganic matter particles are removed, more than 90% of salt in the wastewater is removed by utilizing electrodialysis equipment, so that the energy consumption and the cost of wastewater treatment are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating mustard mustard wastewater. Background technique [0002] Mustard mustard is a kind of semi-dry non-fermented pickle, which is pickled with stem mustard as raw material. It is a very popular side dish in my country and has become an indispensable variety on people's table. Mustard mustard wastewater produced in the production of mustard mustard is a kind of wastewater with high salt content, high organic matter concentration, high nitrogen and phosphorus, and high osmotic pressure. It has problems such as difficult treatment and high treatment cost. Although some areas have launched some special treatment actions to address this problem, the country has no relevant wastewater pollutant discharge control standards, and production and processing enterprises mainly discharge this type of wastewater after dilution. A large amount of mustard mustard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16C02F101/30C02F103/32
CPCC02F9/00C02F2103/32C02F1/4693C02F1/001C02F1/66C02F2209/06C02F3/02C02F2101/30C02F2101/16C02F2209/16C02F2209/18C02F1/5281C02F2001/007C02F2209/08C02F2209/14C02F3/2846
Inventor 张千赵天涛罗万东刘毫李崇明张楚朱宇楠肖芃颖艾铄
Owner CHONGQING UNIV OF TECH
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