| 高含固污泥水热预处理中碳、氮、磷、硫转化规律 |
| 摘要点击 2277 全文点击 1428 投稿时间：2014-07-15 修订日期：2014-10-29 |
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| 中文关键词 高含固污泥 水热预处理 物质转化 水解产物 水解液 |
| 英文关键词 sludge with high solid content thermal hydrolysis pretreatment substance transformation hydrolysis product hydrolysate |
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| 中文摘要 |
| 以城市污水处理厂脱水污泥为对象,探讨其在165℃下经50 min水热预处理的碳、氮、磷、硫转化规律. 结果表明,水热预处理可有效水解污泥中有机组分,VSS水解率达43.35%. 碳、氮、磷、硫在水热预处理过程中表现出不同的转化规律,蛋白质和碳水化合物的水解率分别为54.36%和65.12%,溶解态有机物的主要组分为溶解态蛋白质(52.18%); 不溶态有机氮的水解率54.23%,氨氮占溶解态凯氏氮的22.13%,水解液中的氮主要以有机氮形式存在; 总磷水解率为30.52%,磷酸盐占溶解态总磷的79.84%,说明在水热预处理过程中聚磷酸盐在聚磷菌细胞破碎后极易被水解为磷酸盐; 总硫水解率为50.03%,硫化物占溶解态总硫的0.50%,而有机硫很难水解为硫化物. 通过水热预处理后物质转化及组分分析,旨在为高含固污泥有效处理提供一定的理论参考. |
| 英文摘要 |
| The transformation characteristics of carbon, nitrogen, phosphorus and sulfur in dewatering sludge from municipal wastewater treatment plant (WWTP) were investigated after thermal hydrolysis pretreatment at 165℃ for 50 min. The results showed that the hydrolysis efficiency of VSS could reach as high as 43.35%. 54.36% of protein and 65.12% of carbohydrate were transferred to dissolved organics, respectively, and the main component of dissolved organic matter in hydrolysate was dissolved protein (52.18%). 54.23% of insoluble organic nitrogen was turned into dissolved nitrogen and 22.13% of dissolved nitrogen in hydrolysate was converted to ammonia. The transformation rate of insoluble phosphorus was 30.52%. Dissolved phosphorus was mostly transformed to phosphate (79.84%) as phosphorus-accumulating bacteria cells were crushed. 50.03% of insoluble organic sulfur was hydrolyzed, and little change was detected in sulfide (0.50%). The analysis results of the organic compounds transformation are valuable for treatment of the thermal hydrolysis pretreated sludge with high solid content. |
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