温度对赤子爱胜蚓堆肥处理有机垃圾混合剩余污泥效率的影响

为了探讨环境温度对蚯蚓的生物量及其堆肥效率的影响,进行了不同培养温度条件下赤子爱胜蚓堆肥处理有机垃圾混合剩余污泥的研究。试验结果表明,在其他生态因子保持不变的情况下,赤子爱胜蚓的生长和繁殖具有一个适宜的温度范围,可能在20℃左右,温度太高或太低都对蚯蚓的生长和繁殖不利。赤子爱胜蚓对有机垃圾混合剩余污泥的堆肥效率在20℃达到最高,而在其他温度时较低,特别是低温(5℃、10℃)情况下堆肥效率显著降低,但温度较高(30℃、35℃)时其堆肥效率下降不显著。从产业应用的角度,如果同时考虑蚯蚓维持种群繁衍的再生产能力以及蚯蚓堆肥效率这两个因素,环境温度维持在20℃附近可能最适宜赤子爱胜蚓处理有机垃圾混合剩余污泥。

Effect of temperature on efficiency of Eisenia foetida vermicomposting on organic-waste-mixed municipal sludge

In order to investigate the effect of temperature on earthworm’s biomass and efficiency of vermicomposting,a simulated study of Eisenia foetida vermicomposting on organic-waste-mixed municipal sludge was carried out under different temperatures in laboratory.Results showed that under the condition with other ecological factors unchanged,there was an optimum temperature range for the growth and reproduction of E.foetida.This range was probably around 20℃,and temperatures above or below this range would do harm to earthworm’s growth and reproduction.The efficiency of E.foetida vermicomposting on the organic-waste-mixed municipal sludge got the summit point when the medium temperature was 20℃,but declined under other temperatures,especially under low temperatures(5℃,10℃) where there were significant drops in the efficiency;while under higher temperatures(30℃,35℃),the efficiency drops were insignificant.In the view of industrial application,if the reproductive ability for the earthworm population and the efficiency of vermicomposting are considered together,medium temperature of around 20℃ is possibly the optimum temperature range for the vermicomposting of E.foetida on the organic-waste-mixed municipal sludge.