Method for treating pickle wastewater

Abstract

The invention discloses a method for treating pickle wastewater. The method comprises the following steps: (1) cultivating and domesticating special halotolerant bacteria; (2) feeding the pickle wastewater into a grid well to primarily eliminate suspended solids; (3) conveying the wastewater inside the grid well into a conditioning pond for physical sedimentation, and stirring so as to ensure that the water quality is balanced; (4) feeding the wastewater into an anaerobic system to be treated so as to degrade and decompose organisms; (5) feeding the wastewater into an aerobiotic biochemical system for secondary aerobic anoxic treatment, further decomposing the residual organisms by using aerobic halotolerant bacteria and anoxic halotolerant bacteria respectively, and balancing the water quality; (6) performing solid-liquid separation in a secondary sedimentation tank to settle down sludge, and performing filtering treatment in a carbon filtering tank so as to ensure that the effluent is clear in quality. The method is compact in arrangement, the land is saved, impurities such as suspended solids and organisms in the pickle wastewater are sequentially eliminated, the effect of final sewage treatment is greatly improved, and a great deal of expense for extra treatment is saved for companies.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a treatment method for high-salt-concentration wastewater generated in a kimchi production process. Background technique [0002] In large-scale agricultural and sideline product processing enterprises that mainly produce pickled vegetables, condiments, and red oil series side dishes, industrial wastewater with high salt concentration is produced during the production process, commonly known as pickle wastewater, and its maximum concentration of chloride ions can reach 30,000mg / l; If the waste water is directly discharged into the natural water body, the dissolved oxygen in the water will be consumed rapidly, the water quality will become black and smelly, the transparency of the water body will be reduced, the water body ecosystem will be destroyed, the self-purification ability of the water body will be reduced, the water quality will deteriorate, and the environment will be seri...

AI Technical Summary

Problems solved by technology

[0003] Kimchi wastewater contains a large amount of macromolecular organic matter such as cellulose and lignin, and has the characteristics of high salinity, large fluctuations in water quality, strong inhibitory effect on the growth of common microorganisms, and even kills common microorganisms. The design of the process is not reasonable enough, resulting in the final wastewater treatment results not meeting the national "Comprehensive Wastewater Discharge Standard" (GB8978-1996) first-level discharge standard, so that further treatment is required in the follow-up, which increases the production cost of the enterprise and does not meet the current requirements. The strategic goal of energy conservation and emission reduction advocated by the state

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