Method for treating chlorine alkali waste water by calcium carbide ethyne method and biological treatment agent thereof

Abstract

The invention discloses a chloride-alkali wastewater handling method and a biological additive by carbide acetylene method. The biological additive is composed of amylase of 6-10 percent, tannic acid of 0.2-0.5 percent, Fe2O3 of 0.2-1.0 percent, Al2 (SO4) 3 of 15-20 percent and water. The handling procedure of carbide acetylene method for alkali-chloride wastewater comprises a. using a conventional method to remove sulfur included in the wastewater and to lead the sulfur content to be lower than 100mg / L, b. adding the biological additive to the wastewater, and processing the wastewater as follows: under the cooperation with microorganism, utilizing the tannic acid, the Fe2O3 and the Al2 (SO4) 3 to process the reducing substances included in oxidized wastewater by aeration oxidation and oxygenizing sulfuration remaining in the oxidized wastewater to the end, causing analysis of the acetylene to escape into atmosphere, using metabolism substances included in the acetylene to provide survival and breeding for the microorganism, degrading ammonia nitrogen in the wastewater via nitrobacteria included in the microorganism, absorbing polyvinyl alcohol and monomer vinyl chloride in the wastewater via activated sludge, c. clearing sludge regularly. The invention has the advantages that the handling method and biological additive are perfect in effect of processing carbide acetylene alkali-chloride wastewater, steady in all course quality and low in costs.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a calcium carbide acetylene process chlor-alkali wastewater treatment method and a biological treatment agent thereof. Background technique [0002] The production of polyvinyl chloride by calcium carbide acetylene method adopts wet acetylene generator, and calcium carbide (CaC) reacts with water to generate acetylene (C 2 h 2 ). Ca in lime and coke 3 (PO 4 ) 2 converted to Ca 3 P 2 , which is hydrolyzed to generate PH 3 , After the hydrolysis of aluminum, magnesium nitride and carbon cyanamide in calcium carbide, the by-product ammonia can be produced, and calcium carbide also contains CaS and Ca(CN) 2 and other impurities, which can be hydrolyzed to produce H 2 S and cyanide: [0003] Main reaction: CaC 2 +2H 2 O=Ca(OH) 2 +C 2 h 2 ↑, [0004] Side reaction: CaS+H 2 O=Ca(OH) 2 +H 2 S↑, [0005] Side reaction: Ca 3 P 2 +6H 2 O=Ca(OH) 2 +2PH 3 ↑. [0006] Thes...

AI Technical Summary

Problems solved by technology

Due to the high salinity of this type of wastewater and large fluctuations, these biochemical treatment agents cannot be well absorbed by microorganisms, and the reproduction rate fluctuates, resulting in extremely unstable sewage treatment effects in daily operation, and cannot guarantee full compliance

Moreover, in the treatment of high-salt wastewater, the coagulation effect of activated sludge is poor, and the sludge floats lightly and is difficult to sink, which often leads to a large amount of floating sludge, which affects the treatment effect

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