Method for processing leather-making malodorous gas by biological filter

Abstract

The invention provides a method for processing leather-making malodorous gas by a biological filter, comprising the following steps of: firstly, adding nutrient fluid into waste water and aerating; next, adding trimethylamine, NH4Cl and sulfureted hydrogen into the waste water to acclimate and inoculating mud into filling when the concentration of the mud reaches 4-5g L<-1>, wherein the filling is a compound material comprising porcelain granules, national clinoptilolite and Pall rings, the volume of the filling is 5-10m <3>, and microorganisms are attached on the surface of the filling; then, pumping waste gas into a humidifier and spraying the malodorous gas which enters the humidifier at the same time; and after the sprayed malodorous gas enters the bottom of a biological filtering tank, diffusing the sprayed malodorous gas to a filling layer through a gas distribution plate in an upflow mode, wherein malodorous components are adsorbed and intercepted by a biological film on the filling and finally adsorbed and utilized by microbial populations attached on the surface of the filling after stopping 30-50s in a filtering bed, and purified gas is exhausted by an exhauster. The invention has a good removing function on malodorous gas of a leather-making industry, reduces air pollution and increases production efficiency.

Description

technical field [0001] The invention belongs to the fields of environmental protection and tanning clean production, in particular to a method for treating malodorous gas in tanning with a biological filter. Background technique [0002] As a sensory public hazard, stench has become one of the seven major environmental public hazards in the world. Malodorous substances refer to all gaseous substances that stimulate the olfactory organs and cause people's unpleasantness and damage the living environment. Stench is a compound gas composed of various substances with odor, which stimulates people's sense of smell and brings discomfort and disgust. It is called "sensory public nuisance". [0003] The tanning industry is one of my country's traditional characteristic industries. Due to its large water consumption, complex addition of chemical auxiliary materials, high pollutant concentration, difficult sewage treatment, and outstanding odor impact, this industry is listed as a he...

AI Technical Summary

Problems solved by technology

[0006] At present, there are still many deficiencies in the research and development of biological deodorization technology in my country. Most of the relevant research is the removal of a single component of malodorous gas, and seldom considers the treatment of multi-component composite gases in the actual industrial process. Processing is even more blank