Wastewater comprehensive treatment and utilization process

Abstract

The invention discloses a wastewater comprehensive treatment and utilization process for treating preserved szechuan pickle cleaning wastewater. The technical scheme is as follows: the wastewater comprehensive treatment and utilization process comprises the following steps of: a, introducing the preserved szechuan pickle cleaning wastewater into a filtering tank by using a pressure pump, filtering preserved szechuan pickle leaves and various large-granular impurities, and carrying out incineration treatment in an incinerator; b, transferring filter liquor obtained from the step a into a neutralization kettle with stirring, and dropping a sodium hydroxide solution to regulate the pH value to be 5-7; c, introducing a solution obtained from the step b into an ultrafiltration membrane device for ultrafiltration to obtain concentrated water and produced water; d, adding the concentrated water obtained from the step c to hydrogen peroxide for oxidation reaction, and returning the obtained reaction liquid into the step c for the ultrafiltration; e, introducing the produced water obtained from the step c into a concentration kettle for concentration, recovering water and salt, recycling a generated mother solution into the produced water obtained from the step c, and operating for multiple times. The wastewater comprehensive treatment and utilization process disclosed by the invention has the advantages of easiness, convenience and controllability for operation, environmental friendliness, high waste liquid treatment capacity, high recovery rate and zero discharge of polluting wastes.

Description

technical field [0001] The invention relates to a waste water comprehensive treatment and utilization process, which belongs to the technical field of sewage treatment. Background technique [0002] "Water treatment" is the process of removing some unnecessary substances in water for production and life through physical and chemical means. In recent years, due to the close relationship between social production and life and water, the field of water treatment involves a wide range of applications, forming a huge industrial application. The methods of mustard cleaning wastewater treatment mainly include biological method and physical, physical and chemical combination and electrochemical method. The polluted industrial wastewater or sewage is purified through a series of water treatment equipment to meet the water quality standard stipulated by the state. Biochemical method is the most traditional method for treating saline wastewater, but in domestic treatment, the sudden c...

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Problems solved by technology

Biochemical method is the most traditional method for treating saline wastewater, but in domestic treatment, the sudden change of salt concentration has a great impact on microorganisms, which can directly destroy the normal operation, bacterial micelles solve problems, sludge floats up, and effluent COD rises high, making the operation unstable; the high energy consumption in the electrochemical treatment process, the equipment is easy to corrode, resulting in high operating costs, and the actual large-scale industrial application is still relatively small; the membrane water treatment industry chain includes from top to bottom: membrane material manufacturing , Membrane module production, water treatment project construction, water treatment facility operation and maintenance, in this method, more than two membrane separations are usually used, the investment equipment cost and membrane maintenance cost are high, and the composition of waste liquid is greatly restricted

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