强酸性水对畜禽粪便杀菌的试验研究

Disinfection of Livestock Manure by Acidic Water

以规模化养猪场的新鲜粪便为处理对象,利用强酸性水对其进行杀菌处理。考察了粪大肠杆菌数随处理时间的变化规律、适宜的强酸性水的用量以及不同理化性质的强酸性水对菌落的杀灭情况;比较了无菌蒸馏水、NaClO溶液和强酸性水3种处理液对粪便中菌落的灭活效果。结果表明,强酸性水在前5 min内有较快的杀菌速率;当强酸性水(其理化性质为:有效氯含量(ACC)30.43 mg.L-1、pH<2.7、ORP>1 100 mV)的用量为75 mL时,1 g粪便中的粪大肠杆菌可被完全灭活;无菌蒸馏水对病菌并无杀灭作用,向1 g粪便中加入具有相近ACC的强酸性水(30.43 mg.L-1)和NaClO溶液(30.50 mg.L-1)各75 mL,作用5 min后,对粪大肠杆菌的杀灭率均能达到100%,细菌总数分别降低了近4个对数值和5个对数值;提高强酸性水的理化性质可取得较好的杀菌效果。

The inactivation of feces Escherichia coli with treatment times, appropriate dosages of acidic water, and disinfection effects with different properties of acidic water were studied in the investigation. Meanwhile, we compared disinfection effects of distilled water, NaC10 liquid and acidic water, respectively. The results showed that the inactivation rate against pathogens was faster in first 5 min than the following 15 min. Feces E. coli in 1 g swine manure was inactivated completely by 75 mL acidic water at available chlorine concentration （ACC） of 30.43 mg·L^-1）, pH〈2.7, ORP〉I 100 mV, When adding 75 mL acidic water （ACC of 30.43 mg·L^-1）） and NaC10 liquid （ACC of 30.50mg·L^-1）） into 1 g swine manure, the number of feces E. coli and bacteria counts were discovered to be 4 lgCFU and 5 lgCFU, respectively. If component of the acidic water was optimized, there would be a better disinfection effect.