Advanced treatment process suitable for acidic industrial wastewater

Abstract

The invention discloses an advanced treatment process suitable for acidic industrial wastewater, which comprises the following steps: a pretreatment stage: feeding industrial wastewater to be treated into an oil separator, carrying out oil separation treatment, feeding the wastewater subjected to oil separation into a coagulating basin, and starting a flow propeller of the coagulating basin to carry out coagulation reaction for 2-3 hours; an alkalization treatment stage: putting the chemical wastewater after the pretreatment stage into a hydrolysis alkalization pool for hydrolysis alkalization, wherein the hydrolysis alkalization time is 1-2 hours; a biological treatment stage: treating anaerobic organisms and aerobic organisms by enabling the wastewater to sequentially pass through an anaerobic sedimentation tank, an anoxic hydrolysis tank and an aerobic tank; and a final treatment stage: adding polyaluminum chloride and polyacryloyl into the aerobic tank subjected to biological treatment, and carrying out mud-water separation. The acidity of the industrial wastewater can be adjusted through the alkaline compound, the industrial wastewater is pushed to be circularly stirred through the flow propeller, precipitates of a solution after reaction can be reduced through the flow propeller, and absorption of various plants and organisms is facilitated.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to an advanced treatment process suitable for acidic industrial wastewater. Background technique [0002] With the development of industrialization, the pollution of the surrounding environment caused by the discharge of wastewater generated in the production process of chemical plants is also increasing. During the production of products, processing and other operations in chemical plants, most of the organic pollutants will be released. The structure of these substances Complex, non-biodegradable, toxic and hazardous, and difficult to dispose of. The pollution hazards caused by the discharge of chemical plant wastewater to the environment, as well as the treatment measures taken, are closely related to the characteristics of chemical wastewater, which include the type, concentration and nature of pollutants. The water quality of chemical wastewater is not static. It...

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Problems solved by technology

[0004] In the existing technology, by adding flocculation agents, micro-electrolysis, adsorption and other processes need to replace and clean the packing regularly, which increases the difficulty and cost of operation. The traditional biodegradation process also has low treatment efficiency and it is difficult to control operating parameters and operating effects. However, some improved biodegradation processes have higher input costs and more complicated processes

Therefore, the existing industrial wastewater treatment process has problems such as high treatment cost, low removal efficiency of refractory organic pollutants, unstable process operation, and unsatisfactory treatment effect. It is necessary to develop a more economical, effective, convenient and safe treatment. craft

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