污泥龄调控实现污水污泥资源化处理良性互动

doi:10.19965/j.cnki.iwt.2025-0211

摘要/Abstract

摘要：

结合某再生水厂污水再生处理、污泥资源化处理两大业务板块实际生产数据，系统分析了水区活性污泥系统污泥龄（SRT）的调控情况及其对泥区主要生产指标的影响。结果表明，动态泥龄（DSRT）与基于稳态理论的常规SRT在年度均值上接近，分别为30.72、30.89 d，两者年度差异系数为0.17、0.40，常规SRT波动显著，而DSRT更为稳定，对生物池调控更具指导意义。泥区沼气产率、电耗均与水区DSRT呈现较强的负相关性，第一和第四季度皮尔逊相关系数（PCC）分别为-0.41、-0.46。泥区回流板框滤液氨氮占水区氨氮负荷的11.27%，折合鼓风机电耗约1 500 kW·h/d；泥区回流板框滤液氨氮占水区氨氮负荷的比例与水区常规SRT呈显著负相关，PCC系数为-0.60。基于泥质特性，实施稳健的SRT调控策略，是实现污染物去除与资源化利用全链条良性互动的关键。

关键词: 污水再生处理, 污泥资源化处理, 污泥龄, 沼气产率

Abstract:

Based on the actual production data of two major business segments, sewage regeneration treatment and sludge resource utilization treatment in a wastewater treatment plant, the regulation of sludge age (SRT) in the activated sludge system of the wastewater treatment sector and its impact on the main performance indicators of the sludge treatment sector were systematically analyzed. The results showed that the annual average of the dynamic solids retention time (DSRT) was close to that of the conventional SRT based on steady-state theory, at 30.72 days and 30.89 days respectively, with annual variation coefficients of 0.17 and 0.40. The conventional SRT fluctuated significantly, while DSRT was more stable and had more guidance for the regulation of activated sludge process. The specific biogas production and electricity consumption in sludge treatment sector both showed a strong negative correlation with the DSRT in wastewater treatment sector, with Pearson correlation coefficients (PCC) of -0.41 and -0.46 in the first and fourth quarters of the year, respectively. The ammonia nitrogen content of the filtrate from the reflux plate frame in sludge treatment sector accounted for 11.27% of the ammonia nitrogen load in wastewater treatment sector, which was equivalent to a blower power consumption of about 1 500 kW·h/d. This proportion showed a significant negative correlation with the conventional SRT in the wastewater treatment sector, with a Pearson correlation coefficient of -0.60. Based on the characteristics of the sludge quality, implementing a robust SRT regulation strategy was essential to achieving a virtuous interaction throughout the chain of pollutant control and resource utilization.

Key words: wastewater reclamation, sludge resource utilization treatment, solid retention time, biogas production

中图分类号:

X703.1

时玉龙, 鲍海鹏, 蒋奇海, 白煜, 王金惠. 污泥龄调控实现污水污泥资源化处理良性互动[J]. 工业水处理, 2026, 46(1): 163-167.

Yulong SHI, Haipeng BAO, Qihai JIANG, Yu BAI, Jinhui WANG. SRT regulation for virtuous interaction between wastewater reclamation and sludge management[J]. Industrial Water Treatment, 2026, 46(1): 163-167.

https://www.iwt.cn/CN/Y2026/V46/I1/163

图/表 4

图1 水区生物池MLSS与剩余污泥排放量（a）、SRT（b）、F/M（c）年度变化情况

Fig.1 Annual variations of MLSS，activated sludge discharge （a），SRT （b） and F/M （c） in biological tank in wastewater treatment sector

表1 全年进出水水质变化情况

Table 1 Annual variations of influent and effluent water quality

指标类型		第一季度	第二季度	第三季度	第四季度
进水	水温/℃	12.5~18.3	16.5~24.3	20.2~32.0	14.6~21.6
	BOD₅/（mg·L^-1）	101~439	114~450	97~209	116~261
	COD_Cr/（mg·L^-1）	210~842	214~796	224~500	253~509
	TN/（mg·L^-1）	44.69~69.58	41.10~63.85	24.16~40.27	34.47~52.99
	TP/（mg·L^-1）	4.56~15.60	4.32~12.85	3.79~6.57	3.84~7.57
出水	COD_Cr/（mg·L^-1）	10~17	11~16	7~12	8~14.45
	TN/（mg·L^-1）	9.17~12.77	8.26~11.90	7.61~11.90	7.50~11.79
	TP/（mg·L^-1）	0.06~0.12	0.04~0.12	0.12~0.23	0.09~0.20

图2 泥区消化单元有机物降解率（a）、沼气产率与电耗（b）年度变化情况

Fig.2 Annual variations of volatile solids reduction rate of anaerobic digester （a），specific biogas production and electricity consumption （b） in sludge treatment sector

图3 泥区回流氨氮量及占水区氨氮负荷比例

Fig.3 Ammonia nitrogen content of returned water and its proportion in the ammonia nitrogen load of wastewater treatment sector

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