超声-碱预处理以促进污泥水解效率的研究进展

doi:10.11894/iwt.2019-0347

摘要/Abstract

摘要：

水解阶段是剩余污泥厌氧消化的限速步骤，超声波和碱处理可促使污泥絮体结构解散和内部物质释放，提升污泥的厌氧消化性能。综述了近年来国内外对超声波和碱处理污泥的研究进展，对超声和碱联合处理污泥的工艺条件如超声频率和功率、碱的种类和投加量、处理时间，以及预处理效果，如污泥絮体和细胞破坏情况、释放产物等进行重点分析。

关键词: 超声, 碱处理, 剩余污泥, 厌氧消化, 预处理

Abstract:

The hydrolysis stage is the rate-limiting step of anaerobic digestion of excess sludge. Treatment of sludge with ultrasonic or alkali can promote the dissolution of sludge floc structure and the release of internal substances, remove the hydrolysis restriction, and improve the anaerobic digestion performance of the sludge. The research progress on ultrasonic and alkali treatment of sludge in recent years is reviewed. The process conditions of ultrasonic and alkali combined treatment, such as ultrasonic frequency and power, alkali type and dosage, processing time, are analyzed. Especially, the effects of pretreatment, such as changes in sludge flocs and cell destruction, the release of products, are analyzed.

Key words: ultrasonic, alkali treatment, excess sludge, anaerobic digestion, pretreatment

中图分类号:

X703
TU992.3

张婧伟,白周央,杨树成. 超声-碱预处理以促进污泥水解效率的研究进展[J]. 工业水处理, 2020, 40(4): 12-17.

Jingwei Zhang,Zhouyang Bai,Shucheng Yang. Research progress on the improvement of hydrolysis efficiency by ultrasonic-alkali pretreatment of sludge[J]. Industrial Water Treatment, 2020, 40(4): 12-17.

https://www.iwt.cn/CN/Y2020/V40/I4/12

图/表 1

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污泥TS/（mg·L^-1）	实验条件	超声输入	碱种类	碱投加剂量	预处理时间	效果	参考文献
4 613±293	碱-超声同时	120 W×14.4 sec/mL	NaOH	40 mg/L	4 h	经21 h发酵TVFA/TCOD为81%，空白组＜10%	〔17〕
	单独碱处理	—	NaOH	40 mg/L	24 h	TVFA/TCOD为21%
	先碱处理后超声	—	NaOH	40 mg/L	24 h+2 h	TVFA/TCOD为64%
16 277	碱-超声同时	3 750 kJ/kg TS	NaOH	0.04 mol/L	30 min	DD（COD）为51%	〔15〕
		—	Ca（OH）₂			DD（COD）为33%
	单独碱处理	—	NaOH			DD（COD）为23%
		—	Ca（OH）₂			DD（COD）为8%
	单独超声	3 750 kJ/kg TS	—	—	10 min	DD（COD）为26%
37 100±4 900	先碱处理后超声	7 500 kJ/kg TS	KOH	0.041 mol/L	1 h+2.5 h	DD（COD）为59.8%	〔18〕
	单独碱处理	—			1 h	DD（COD）为21.4%
	单独超声	7 500 kJ/kg TS	—	—	2.5 h	DD（COD）为19.5%
3 935	碱-超声同时	1 W/mL	NaOH	0.05 moL/L	30 min	DD（COD）为38.8%	〔21〕
	单独碱处理	—				DD（COD）为14.4%
	单独超声	1W/mL	—	—	10 min	DD（COD）为22%
15 000~17 000	碱-超声同时	21 000 kJ/kg TS	NaOH	0.05 moL/L	30 min	DD（COD）为80%	〔24〕
	单独碱处理	—				DD（COD）为19.6%
	单独超声	21 000 kJ/kg TS	—	—		DD（COD）为38.2%

污泥TS/（mg·L^-1）	实验条件	超声输入	碱种类	碱投加剂量	预处理时间	效果	参考文献
4 613±293	碱-超声同时	120 W×14.4 sec/mL	NaOH	40 mg/L	4 h	经21 h发酵TVFA/TCOD为81%，空白组＜10%	〔17〕
	单独碱处理	—	NaOH	40 mg/L	24 h	TVFA/TCOD为21%
	先碱处理后超声	—	NaOH	40 mg/L	24 h+2 h	TVFA/TCOD为64%
16 277	碱-超声同时	3 750 kJ/kg TS	NaOH	0.04 mol/L	30 min	DD（COD）为51%	〔15〕
		—	Ca（OH）₂			DD（COD）为33%
	单独碱处理	—	NaOH			DD（COD）为23%
		—	Ca（OH）₂			DD（COD）为8%
	单独超声	3 750 kJ/kg TS	—	—	10 min	DD（COD）为26%
37 100±4 900	先碱处理后超声	7 500 kJ/kg TS	KOH	0.041 mol/L	1 h+2.5 h	DD（COD）为59.8%	〔18〕
	单独碱处理	—			1 h	DD（COD）为21.4%
	单独超声	7 500 kJ/kg TS	—	—	2.5 h	DD（COD）为19.5%
3 935	碱-超声同时	1 W/mL	NaOH	0.05 moL/L	30 min	DD（COD）为38.8%	〔21〕
	单独碱处理	—				DD（COD）为14.4%
	单独超声	1W/mL	—	—	10 min	DD（COD）为22%
15 000~17 000	碱-超声同时	21 000 kJ/kg TS	NaOH	0.05 moL/L	30 min	DD（COD）为80%	〔24〕
	单独碱处理	—				DD（COD）为19.6%
	单独超声	21 000 kJ/kg TS	—	—		DD（COD）为38.2%

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