| 摘要: |
| 针对传统市政污泥好氧发酵过程难溶性磷酸盐向有效磷转化效率低的问题，本研究依次添加物料总质量0%、5%、10%、15%的木质素磺酸钠（SLS）（记为CK、S5、S10、S15），探究其对市政污泥好氧发酵过程磷形态转化的影响及作用机制。结果表明：添加SLS优化了堆体理化性质，促进胡敏素（HU）向胡敏酸（HA）和富里酸（FA）转化；同时SLS可以有效提高堆体的速效磷（Olsen-P）含量，Hedley磷分级结果显示，S5、S10、S15处理组有效磷（AP）和中等可用磷（MAP）在总磷中所占比例为58.48%、54.35%、49.35%，远高于CK处理组；相关性分析表明，含水率（MC）、电导率（EC）、有机质（OM）、腐殖质（HS）、FA、碳氮比（C/N）、HA是影响Olsen-P累积的主要因素，与H2O-P呈正相关并按照相关性强弱排序依次为C/N、EC、FA。综上，在市政污泥好氧发酵中添加SLS可提高堆体的磷素有效性，磷形态转化主要是通过SLS自身官能团的鳌合能力以及提高堆体腐殖化程度实现。 |
| 关键词: 市政污泥 好氧发酵 木质素磺酸钠 腐殖质 磷形态 |
| DOI： |
| 投稿时间：2023-02-13修订日期：2023-06-26 |
| 基金项目: |
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| Effect of Sodium Lignosulfonate on the transformation of Phosphorus forms during Aerobic Fermentation of Municipal Sludge |
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Lin Huanyun1, HU Zhanbo1, CHEN Qiuyu1, XUE Yuyang1, ZHENG Yukai2
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| (1.School of Resources, Environment and Materials, Guangxi University，Key Laboratory of Environmental Protection (Guangxi University), Education Department of Guangxi Zhuang Autonomous Region;2.School of Environment and Energy, South China University of Technology) |
| Abstract: |
| Aiming at the problem of low conversion of insoluble phosphate to effective phosphorus during the aerobic fermentation of municipal sludge, this study investigated the effects and mechanisms of the addition of sodium lignin sulfonate (SLS) at 0%, 5%, 10% and 15% (denoted as CK, S5, S10 and S15) of the total mass of the material in order to investigate its effect on the conversion of phosphorus form during the aerobic fermentation of municipal sludge. The results showed that the addition of SLS optimised the physicochemical properties of the piles and promoted the conversion of huminin (HU) to huminic acid (HA) and fulvic acid (FA); meanwhile, SLS could effectively increase the content of Olsen-P in the piles, Hedley phosphorus classification results showed that the proportions of available phosphorus (AP) and medium available phosphorus (MAP) in total phosphorus in S5, S10 and S15 treatment groups were 58.48%, 54.35% and 49.35%, which were much higher than those in CK treatment group. The correlation analysis showed that water content (MC), electrical conductivity (EC), organic matter (OM), humus (HS), FA, carbon to nitrogen ratio (C/N) and HA were the main factors affecting the accumulation of Olsen-P, and were positively correlated with H2O-P and ranked in order of strength as C/N, EC and FA. In summary, the addition of SLS to municipal sludge aerobic fermentation can increase the effectiveness of phosphorus in the pile, and phosphorus morphological transformation is achieved mainly through the chelating ability of its own functional groups and by increasing the degree of pile humification. |
| Key words: Municipal Sludge Aerobic Fermentation Lignosulfonate Sodium Humus Phosphorus Form |
