降解生物质气化洗焦废水微生物的选择

选用首都师范大学生物系保存的菌种，采用单一菌种和混合菌种对生物质气化洗焦废水进行生物降解，选择有较好降解生物质气化焦废水能力的微生物。当洗焦废水含量为100mL/L时，单一菌种和混合菌种可使洗焦废水中的COD去除率分别达到58．3％和81．4％。混合菌种对洗焦废水的降解率明显高于单一菌种，当洗焦废水含量分别为150mL/L,200mL/L和300mL/L时，混合菌种S4对洗焦废水的COD去除率分别是63．6％，56．7％和51．2％，随着洗焦废水含量增加，微生物对其降解速度减慢，降解率降低。洗焦废水含量在100mL/L以下时，混合菌种对其有理想的降解效果。

MICROBIAL SELECTION FOR DECOMPOSING TAR-WASHED WASTEWATER DISCHARGED FROM THE PROCESS OF BIOMASS GASIFICATION

Single cultures and co cultures preserved in the lab of Capital Normal University were utilized to treat tar washed wastewater in order to select the microorganisms which had a high ability to degradate tar washed wastewater discharged from the process of biomass gasification. When tar washed wastewater concentration was 100mL/L, the COD removal rate reached 58.3% and 81.4% by single cultures and co cultures respectively, the degradation rate of co cultures is obviously higher than that of single cultures. When tar washed wastewater concentration was increased to 150mL/L, 200mL/L and 300mL/L, the COD removal rate was 63.6%, 56.7%and 51.2% with co cultures respectively. Higher concentration of tar washed wastewater diminish the decomposition significantly, whereas, ideal treatment efficiency can be obtained by co cultures with tar washed wastewater concentration 100mL/L.