Carbide method acetylene wastewater treatment method and biological treatment agent

Abstract

The invention relates to a carbide method acetylene wastewater treatment method and a biological treatment agent. The biological treatment agent comprises 6-10% of amylase, 0.2-0.5% of tannic acid, 0.2-1.0% of Fe2O3, 15-20% of Al2(SO4)3, and the balance of water. The method comprises the following steps: 1, removing sulfur in wastewater through a routine technology to make the sulfur content be lower than 100mg / L; 2, adding the biological treatment agent related in claim 1, carrying out oxidation aeration on reduction substances in the wastewater under the synergism of microbes by using tannic acid, Fe2O3 and Al2(SO4)3 to make sulfides and derivatives thereof residual in the wastewater be oxidized until an end point and exist in water in an SO<4><2-> ion state, resolving dissolved acetylene and acetylene salts to form a gas escaping to atmosphere, precipitating the oxidized reduction substances and the synergism microbes to form sludge, allowing the microbes to survive and breed by using the amylose as a microbe slow release metabolism substance, degrading ammonia nitrogen in the wastewater by using nitrobacteria in the microbes, and adsorbing polyvinyl alcohol and monomer vinyl chloride in the wastewater through activated sludge to make polyvinyl alcohol and the monomer vinyl chloride precipitate to form sludge; and 3, regularly removing the sludge.

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