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In the paper, the effects of such factors as high load operation, excessive concentration of volatile phenols and microbial poisoning on system stability are systematically analyzed aiming at the practical problem of abnormal increase of chemical oxygen demand (COD) in effluent of biological dephenolization system of Inner Mongolia Baotou Steel Qinghua Coal Chemical Industry Co., Ltd.. The COD in effluent is successfully reduced to standard level within two months so that operation pressure of subsequent advanced water treatment system is significantly relieved by adopting such comprehensive measures as reducing load of inlet, optimizing dissolved oxygen concentration, adding COD degrading bacteria and nitrifying bacteria, supplementing alkalinity to stabilize pH value, adding pulverized fuel ash into oxic tank to adsorb toxic substances as well as adjusting the strategies of sludge return and spoil disposal.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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