剩余活性污泥完全资源化利用微生物集成技术

Microbiological technology for the comprehensive utilization of excess activated sludge

摘要:

剩余活性污泥完全资源化利用微生物集成技术包括: 使用土著PHA合成菌回注法驯化并发酵活性污泥, 生产生物降解材料聚羟基脂肪酸酯(PHA); 采用土著嗜酸性氧化亚铁硫杆菌和氧化硫硫杆菌进行生物淋滤, 去除重金属; 以解磷菌和解钾菌为菌种, 进行固态发酵, 生产生物菌肥。结果表明, 500 L中试PHA占挥发性悬浮固体的20%以上; 重金属含量达到国家排放要求; 生物菌肥中活菌数大于1×108 个/g以上。实现了剩余活性污泥的近零排放。

Abstract:

Microbial technology for the comprehensive utilization of excess activated sludge, i.e. production of PHA by adding native PHA synthesis-bacteria during domestication and fermentation for activated sludge; bioleaching activated sludge to remove heavy metals by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans; production of biological fertilization by using solid state fermentation for P-solubilizing bacteria and K-releasing bacteria. Results showed that the ratio of PHA in VSS was above 20% under the 500 L pilot scale; the contents of heavy metals in activated sludge accorded with the National Discharge Standard; the number functional bacteria for microbial fertilizer was above one hundred million.