School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China.
Shanghai Urban Construction Design & Research Institute, 3447 Dongfang Road, Shanghai, 200125, China.
Environ Sci Pollut Res Int. 2019 Oct;26(30):30625-30632. doi: 10.1007/s11356-018-2324-4. Epub 2018 May 23.
In order to reduce the impacts on sludge treatment facilities caused by impurities such as fibers, hairs, plastic debris, and coarse sand, an innovative primary sludge pretreatment technology, sludge impurity separator (SIS), was proposed in this study. Non-woven micromesh with pore size of 0.40 mm was used to remove the impurities from primary sludge. Results of lab-scale tests showed that impurity concentration, aeration intensity, and channel gap were the key operation parameters, of which the optimized values were below 25 g/L, 0.8 m/(m min), and 2.5 cm, respectively. In the full-scale SIS with treatment capacity of 300 m/day, over 88% of impurities could be removed from influent and the cleaning cycle of micromesh was more than 16 days. Economic analysis revealed that the average energy consumption was 1.06 kWh/m treated sludge and operation cost was 0.6 yuan/m treated sludge.
为了减少纤维、毛发、塑料碎片和粗砂等杂质对污泥处理设施的影响，本研究提出了一种创新的初沉污泥预处理技术——污泥杂质分离器（SIS）。采用孔径为 0.40 毫米的无纺微网去除初沉污泥中的杂质。实验室规模试验结果表明，杂质浓度、曝气强度和通道间隙是关键的操作参数，其优化值分别低于 25 g/L、0.8 m/（m·min）和 2.5 cm。在处理能力为 300 m/天的全尺寸 SIS 中，超过 88%的杂质可以从进水口去除，微网的清洗周期超过 16 天。经济分析表明，平均能耗为 1.06 kWh/m 处理污泥，运行成本为 0.6 元/m 处理污泥。
