Juris P, Plachý P, Lauková A
Parasitological Institute, Slovak Academy of Sciences, Kosice.
Vet Med (Praha). 1995 May;40(5):157-62.
The survival of 8 bacterial species (Pseudomonas sp., Salmonella sp., Enterobacteriae, Streptococcus sp., Escherichia coli) was detected in municipal sewage sludge up to 37 hours of mesophilic aerobic digestion under laboratory conditions. The model strain Enterococcus faecium CCM 4231 survived almost twice as long as the above-mentioned isolates. Similar findings, regarding the viability of the microorganisms studied, were also determined during thermophilic aerobic digestion of municipal sewage sludges. The final reduction in the total count of bacteria was not directly dependent on the temperature during aerobic digestion. It may be supposed that E. faecium CCM 4231 strain as a bacteriocin-producing strain with a broad antimicrobial spectrum, inoculated into the sludges, could inhibit the growth of microorganisms in the sludges by the way of its bacteriocin activity. Studying the effect of aerobic digestion on the viability of helminth eggs, the observed negative effect of higher temperatures was more expressive in comparison with bacterial strains. During thermophilic digestion process all helminth eggs (Ascaris suum, Toxocara canis) were devitalized. All eggs of T. canis were killed in experiments under mesophilic temperature. However, 32% of nonembryonated A. suum eggs remained viable.
在实验室条件下，对城市污水污泥进行长达37小时的中温需氧消化过程中，检测了8种细菌（假单胞菌属、沙门氏菌属、肠杆菌科、链球菌属、大肠杆菌）的存活情况。粪肠球菌CCM 4231模式菌株的存活时间几乎是上述分离菌株的两倍。在城市污水污泥的高温需氧消化过程中，也确定了有关所研究微生物活力的类似发现。需氧消化过程中细菌总数的最终减少并不直接取决于温度。可以推测，接种到污泥中的具有广泛抗菌谱的产细菌素菌株粪肠球菌CCM 4231，可能通过其细菌素活性抑制污泥中微生物的生长。在研究需氧消化对蠕虫卵活力的影响时，与细菌菌株相比，观察到的较高温度的负面影响更为明显。在高温消化过程中，所有蠕虫卵（猪蛔虫、犬弓首蛔虫）均失活。在中温温度下的实验中，所有犬弓首蛔虫卵均被杀死。然而，32%的未受精卵猪蛔虫卵仍具有活力。
