粒径对好氧颗粒污泥储存稳定性的影响

doi:10.16085/j.issn.1000-6613.2019-0077

摘要/Abstract

摘要：

研究了混合粒径与不同粒径好氧颗粒污泥（AGS）在储存过程中的三维结构、质量变化、微生物活性以及理化特性的变化规律。经过室温（16~25℃）下31天的储存，污泥的三维结构均保持较好，未出现明显解体现象。混合粒径的AGS在储存前20天，其质量和比耗氧速率（SOUR）下降缓慢，胞外聚合物（EPS）先减小后上升。20天之后由于厌氧菌在竞争中逐渐占得优势，其质量减小了46.3%，EPS与SOUR分别下降69.0%和72.7%，导致稳定性随之下降。不同粒径AGS经过储存后，其颜色仍为橙黄色且结构完整；1~2mm和3~4mm粒径的AGS质量减小（分别为49.1%和53.9%）较大，且SOUR和EPS下降了亦较大；0.3~1mm粒径的AGS质量减小较少，EPS下降较少，但SOUR下降幅度较大，而2~3mm粒径的质量仅减小了33.7%、SOUR下降幅度最小（39.8%），EPS下降幅度也相对较小（58.7%），表明其在储存过程中能保持较好的活性与稳定性。

关键词: 好氧颗粒污泥, 粒径, 包埋, 储存, 稳定性

Abstract:

The three-dimensional structure, mass change, biological activity and physical and chemical properties of different particle sizes and mixed particle size aerobic granule sludges (AGS) during storage were studied. After 31 days of storage at room temperature (16—25℃), the sludge structure remained good and there was no obvious disintegration. In the first 20 days of storage, the quality and specific oxygen uptake rate (SOUR) of the mixed particle size AGS decreased slowly. Extracellular polymer (EPS) first decreased and then raised. Then, due to the anaerobic bacteria took advantage of the competition, its quality (46.3%), EPS (69.0%) and SOUR (72.7%) decreased significantly, resulting in a decrease in stability. After storage of different particle size AGS, the color was still orange and the structure was complete. The AGS mass loss of 1—2mm and 3—4mm particle size (49.1% and 53.9%, respectively) was larger, and the decrease of SOUR and EPS was also larger. The mass of AGS with 0.3—1mm particle size decreased lesser, and EPS decreased lesser, but the decrease of SOUR was larger, while the quality of 2—3mm particle size only decreased by 33.7%. The decrease of SOUR was the smallest (39.8%). The EPS decline was relatively small (58.7%), which showed that it could maintain good activity and stability during the storage.

Key words: aerobic granular sludge, particle size, embed, storage, stability

中图分类号:

TU992.3

张立楠, 张斌超, 刘祖文, 宣鑫鹏, 程媛媛, 龙焙, 邢雨, 兰鑫, 曾敏静. 粒径对好氧颗粒污泥储存稳定性的影响[J]. 化工进展, 2019, 38(07): 3450-3457.

Linan ZHANG, Binchao ZHANG, Zuwen LIU, Xinpeng XUAN, Yuanyuan CHENG, Bei LONG, Yu XING, Xin LAN, Minjing ZENG. Effect of particle size on storage stability of aerobic granular sludge[J]. Chemical Industry and Engineering Progress, 2019, 38(07): 3450-3457.

图/表 11

图1 储存过程中AGS形态变化

表1 储存前后AGS中元素组成

元素	质量分数/%		元素	质量分数/%
元素	储存前	储存后	元素	储存前	储存后
C	36.29	17.68	S	0.37	0.13
N	11.84	8.28	Cl	0.07	0.06
O	24.79	36.17	K	14.7	15.74
Na	0.43	0.83	Ca	3.35	9.84
Mg	0.26	0.76	Fe	0.16	0.68
P	7.16	9.09	Cu	0.56	0.75

图2 储存过程中AGS亏损质量分数

图3 储存过程中EPS及PN/PS变化

图4 储存过程中SOUR的变化

图5 不同粒径AGS储存31天后的形态（a、b、c、d分别为0.3~1mm、1~2mm、2~3mm和3~4mm）

图6 不同粒径AGS储存后的质量亏损

图7 不同粒径储存前后EPS、PN/PS的变化

图8 不同粒径储存前后SOUR的变化

图9 不同粒径AGS的沉速变化

表2 不同粒径AGS稳定性下降程度

粒径/mm	下降幅度/%
粒径/mm	质量	EPS	SOUR
混合粒径	52.8	55.5	65.3
0.3~1	38.6	54.6	61.7
1~2	49.1	69.5	55.0
2~3	33.7	58.7	39.8
3~4	53.9	67.2	63.2

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