制革污泥厌氧处理基础研究

Primary Research on Anaerobic Treatment of Tannery Sludge

通过对污泥进行厌氧处理试验,研究其可燃气体的产生和主要污染物的迁移。结果表明:厌氧消化可以使污泥减量28%,可燃气体的平均产量为0.083m3/kg。厌氧消化将部分硫和铬排到了气体中,厌氧处理可将65.28%六价铬还原成低价态的铬。可燃气体中硫化氢含量比普通沼气中硫化氢含量高190%,甲烷含量比普通沼气甲烷含量低23%。

The production of the combustible gas and the transfer of the main pollutants were studied with the experiment for the anaerobic treatment of the tannery sludge. The results show that the weight of the sludge reduces about 28%, the average out- put of flammable gas was 0. 083 m3/kg. The anaerobic treatment makes some of the sulfur and chromium in sludge into the product gas, and reduces some chrome from Cr（ Ⅵ）to low state chrome, the reduction rate is 65.28%. There were 190% more hydrogen sulfide and 23% less methane in the product gas than the ordinary firedamp.