Development of Excess-Sludge Zero-Emission Type of Activated Sludge Process

(1)目的生活污水生物处理设施产生的污泥是固体废物中的主要成分，其处理成本较高。对剩余污泥减量化的开发进行了研究，对剩余污泥进行了水热反应处理，并将处理后的污泥回流到生物反应器中。(2)结果水热反应将污泥中含有的生物聚合物分解为糖、氨基酸、脂肪等小分子化合物。在未来的研究中，我们将从性能和成本的角度对本研究开发的处理工艺进行评估，并将我们的技术转移到工业领域。另外，附加的厌氧工艺也是必要的，以防止处理后的污泥回流增加底物，并产生沼气。

(1) PurposeThe sludge from biological treatment facility for domestic wastewater is predominant among solid wastes, and the large amount of cost is required to treat it. The development to reduce the excess sludge has been studied, and the excess sludge was treated with hydrothermal reaction and the treated sludge was by return of it into the bioreactor.(2) ResultsThe bio-polymer compounds contained in the sludge was decomposed into small molecular compounds such as sugars, amino-acid and fats with hydrothermal reaction. The small molecular compounds was returned into the bioreactor and decomposed into inorganic compounds.(3) ProspectIn future research, we will try to evaluate the treatment process developed in the present research from viewpoints concerning performance, cost and to transfer our technology to industrial sector. And also, the additional unaerobic process is necessary to prevent the increase of substrate by the return of the treated sludge and to produce the biogas.