酒精加工废弃物与城市污泥混合高温好氧发酵效果

Thermophilic Aerobic Fermentation of Distillery Residues and Sewage Sludge

酒精加工废弃物与城市污泥混合高温好氧发酵,既可以实现酒精加工废弃物资源化利用,又能满足城市污泥无害化处理的需求。研究了木薯酒精加工废弃物与城市污泥高温好氧发酵过程中物料性质的动态变化,结果表明:堆体发酵温度高于55℃且持续6 d,实现了物料的无害化处理要求;物料含水率、挥发性固体含量、pH值分别由65.2%、73.5%、7.6降至51.7%、67.8%、7.2;物料电导率在好氧发酵过程中呈上升态势,发酵产品的电导率为2 564μS/cm,不具有植物盐害效应;发酵产品的种子发芽指数为74.4%,物料实现腐熟、性质趋于稳定。

Thermophilic aerobic fermentation of distillery residues and sewage sludge can not only achieve the resource utilization of distillery residues but also realize the harmless treatment of sewage sludge. The dynamic variation of material properties during thermophilic aerobic fermentation of distillery residues and sewage sludge was studied. The results indicated that the eomposting pile temperature was higher than 55 ℃ and maintained for 6 days. The moisture content, volatile solid and pH decreased from 65.2%, 73.5% and 7.6 to 51.7%, 67.8% and 7.2 respectively. Although the conductivity of the ma- terial showed an ascending trend during thermophilic aerobic fermentation, the final conductivity of the product was 2 564 μS/cm, which had no plant salt injury effect. The germination index of composting products was 74.4% which reflected that the compost was mature and stable.