污泥厌氧消化结合热水解和深度脱水过程中养分变化的季节变化

IF 7.1 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Waste management Pub Date : 2025-04-13 DOI:10.1016/j.wasman.2025.114785

Bing Zhao , Yuxin Wang , Jiawei Wang , Yinquan Qiu , Fenfen Zhu , Qian Chen , Yuhui Zhang , Huan Wang , Xingmin Fu

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引用次数: 0

摘要

污泥的质量受季节变化和特定处理阶段的影响很大，特别是营养水平和有机物成分的变化。然而，人们对这些影响的具体机制仍然知之甚少。本研究从北京某大型污水处理厂采集了春、夏、秋、冬四个季节的污泥样本，涵盖了 "预脱水+热水解+厌氧消化+深度脱水 "的各个工艺节点。对采集的污泥样品进行了土壤主要养分（C、N、P、K、Na、Ca 和 Mg）的系统分析。结果表明，秋季污泥中 C、N 和 P 的浓度较高，总有机碳含量达到 29.23%，TN 为 44,470.70 毫克/千克，TP 为 28,572.89 毫克/千克。处理后，C、N 和 Na 的浓度分别下降了 34.9%、20.4% 和 12.0%。相反，P、Ca 和 Mg 的浓度分别增加了 20.4%、52.7% 和 39.9%。此外，K、Na、Ca 和 Mg 的可还原部分含量普遍增加了 41.68 %、14.01 %、31.30 % 和 27.13 %，而可氧化部分则分别增加了 101.03 %、57.27 %、101.68 % 和 59.38 %。污泥肥料质量指数（SFQI）显示，经过处理的污泥肥力提高了 1.6 倍。这项研究首次使用 SFQI 对污泥质量进行量化，并系统地评估污泥管理对养分动态的影响。它为污泥土地利用和资源化提供了科学依据。

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Seasonal variations in nutrient changes during sludge anaerobic digestion combined with thermal hydrolysis and deep dewatering

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Seasonal variations in nutrient changes during sludge anaerobic digestion combined with thermal hydrolysis and deep dewatering

The quality of sludge is significantly influenced by seasonal variations and specific treatment stages, particularly through changes in nutrient levels and organic matter composition. However, the detailed mechanisms of these effects remain poorly understood. In this study, sludge samples were collected from a large-scale wastewater treatment plant in Beijing during spring, summer, autumn and winter, across each process node of the “pre-dewatering + thermal hydrolysis + anaerobic digestion + deep dewatering”. A systematic analysis of key soil nutrients (C, N, P, K, Na, Ca and Mg) was conducted on the collected sludge samples. The results demonstrated the concentration of C, N and P in sludge was higher in autumn, with TOC reaching 29.23 %, TN at 44,470.70 mg/kg and TP at 28,572.89 mg/kg. The concentrations of C, N and Na decreased by 34.9 %, 20.4 % and 12.0 % following treatment. Conversely, the concentrations of P, Ca and Mg increased by 20.4 %, 52.7 % and 39.9 %, respectively. Additionally, the reducible fraction contents of K, Na, Ca and Mg exhibited a general increase of 41.68 %, 14.01 %, 31.30 % and 27.13 %, while their oxidizable fractions increased by 101.03 %, 57.27 %, 101.68 % and 59.38 %. The sludge fertilizer quality index (SFQI) showed that the fertility of the treated sludge increased by 1.6 times This study is the first time to use SFQI to quantify sludge quality and systematically evaluate the impact of sludge management on nutrient dynamics. It provides a scientific basis for sludge land utilization and resource utilization.

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来源期刊

Waste management 环境科学-工程：环境

CiteScore

15.60

自引率

6.20%

发文量

492

审稿时长

39 days

期刊介绍： Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)