【摘要】：為降低堆肥成本、促進(jìn)資源化利用和集約化養(yǎng)殖場奶牛糞污處理,采用小型堆肥反應(yīng)器,研究利用奶牛糞污壓榨殘?jiān)M(jìn)行無輔料添加條垛式堆肥的可行性.堆肥過程中監(jiān)測物料溫度和各種理化指標(biāo)的變化,并跟蹤解析微生物群落.條垛式模擬堆肥共持續(xù)75 d,肥堆溫度維持50℃以上達(dá)10 d,水分含量逐漸降低.pH在開始階段略有增加后最終降低到約8.0.有機(jī)物降解率在堆肥前30 d迅速增加,而后逐漸增加到57.8%,C/N隨著有機(jī)物的降解降低到9.75.NH_4~+在堆肥進(jìn)行20 d后顯著降低,由于硝化作用NO_3~-逐漸增加,最終產(chǎn)品中未檢測到NH_4~+,NO_3~-含量達(dá)到2 208.8 mg/kg(干重).堆肥結(jié)束時(shí)物料的電導(dǎo)率為2 250.8μS/cm,低于文獻(xiàn)推薦限值3 000μS/cm;成熟堆肥的種子發(fā)芽指數(shù)達(dá)到120.4%.高通量測序結(jié)果顯示,微生物群落結(jié)構(gòu)在堆肥前期發(fā)生了顯著變化,堆肥后期則保持相對穩(wěn)定,氨氧化細(xì)菌Nitrosococcus和硝化細(xì)菌Nitrolancea、Nitrospira進(jìn)行了NH_4~+向NO_3~-的轉(zhuǎn)化,堆肥19 d后硝化細(xì)菌占總細(xì)菌的比例達(dá)2%以上.綜上,條垛式堆肥適合處理奶牛糞渣,可在無輔料添加情況下達(dá)到理想的堆肥效果,成熟堆肥質(zhì)量優(yōu)良.(圖10表1參25)
[Abstract]:In order to reduce the cost of composting and promote the utilization of resources and intensive treatment of cow manure in the farm, the feasibility of adding stacked compost without auxiliary material was studied by using a small composting reactor. The changes of material temperature and physical and chemical indexes were monitored during composting, and microbial communities were analyzed. The results showed that the simulated composting lasted for 75 days, and the temperature of the compost kept above 50 鈩，

本文編號：2121595