Process for processing saccharin sodium wastewater

Abstract

The present invention relates to a process for processing saccharin sodium (sodium ortho-sulphobenzimide) wastewater, which comprises the following steps of: (1) pumping wastewater into an iron-carbon microelectrolytic pool from a wastewater adjusting pool by a lifting pump to perform preprocessing; (2) carrying out degradation and precipitation in a Huffington precipitating pool; (3) hydrolyzing, acidulating and processing in the precipitating pool; (4) entering the adjusting pool to adjust water quality; uniformly adjusting and then charging in a UASB reactor; (5) entering a biological contact oxidation pool; (6) leading the sewage after biological contact oxidation pool reaction to flow into a secondary precipitating pool; precipitating and then flowing into an air floatation pool to be discharged after reaching the standard. Compared with other process flows, the process can reduce dilute water volume and the running cost; and by test demonstration, the method is practical and can achieve the discharge water requirement. The process for processing saccharin sodium (sodium ortho-sulphobenzimide) wastewater provided by the present invention optimizes the running parameter on the basis of a middle test, solves the encountered problem and can design the reaction process flow which can achieve the requirement.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a treatment process for sodium saccharin waste water. Background technique [0002] After analyzing the water quality of sodium saccharin wastewater in the laboratory, it is found that the sodium saccharin wastewater contains a very small amount of oil components, and the water quality is relatively acidic. The results of chromatography-mass analysis show that the contribution of COD in sodium saccharin wastewater is dominated by large molecular weight and refractory organic components, the most important of which are aromatic compounds and toxic organic solvents, and the main organic compounds are o-aminobenzene Methyl ester, methyl o-chlorobenzoate, phthalic anhydride and its derivatives, etc., as well as high concentrations of inorganic salts, especially Cu2+, C1, SO42+. Therefore, it is difficult to dispose of it through simple biodegradation. [0003] In order to treat sacc...

AI Technical Summary

Problems solved by technology

However, the cost of the advanced oxidation method is too high, and the common biochemical method needs more than 5 times of dilution water to dilute the wastewater to a biologically acceptable concentration because it cannot withstand high-concentration impact loads.

[0004] The construction of sewage treatment plants requires high construction investment, and at the same time, a large amount of funds are required to build supporting facilities, and the operating costs after completion are also considerable, so operating costs and dilution water consumption are the main disadvantages of this method

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