城市污泥陶粒制备技术与应用研究进展

doi:10.19964/j.issn.1006-4990.2021-0568

Abstract

Abstract:

Sewage sludge is a by?product of wastewater treatment，which is increased with the more sewage treatment capacity and rate.However，the scale and level of sludge treatment and disposal are difficult to match with the level of sewage treatment.Sludge treatment focuses on harmless disposal at present，and the resource utilization rate is insufficient.The composition of sewage sludge was compared with raw materials of ceramsite.The feasibility，basic process and conditions of preparation ceramsite from sewage sludge were introduced and analyzed.And the research and application of ceramsite or modified ceramsite from sewage sludge were comprehensively discussed，reviewed and prospected.The results showed that because the sludge contained a large amount of organic matter，as well as inorganic components such as silicon and aluminum，and the proportion of each component was appropriate，it could be prepared into ceramsite at high temperature，which could be used as light aggregate，cultivation matrix or water treatment filter material for subsequent use.Because sludge ceramsite had certain adsorption capacity，it could be modified to strengthen its adsorption performance.The future research direction of sludge ceramsite was to optimize the strength of sludge ceramsite and its adsorption of specific pollutants from three aspects:raw material configuration，preparation conditions and functional modification.

Key words: sewage sludge, ceramsite, application, modification, adsorbent

CLC Number:

X705

ZHANG Xiaoya,LI Jiali,FENG Lijuan,WANG Ji. Research progress on preparation technology and application of municipal sludge ceramsite[J]. Inorganic Chemicals Industry, 2022, 54(9): 28-38.

Figures/Tables 2

Table 1

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污泥来源	主要化学成分质量分数/%
污泥来源	SiO₂	Al₂O₃	Fe₂O₃	CaO	MgO	Na₂O	K₂O
江苏省^[3-5]	29.37	10.90	11.30	3.10	2.17	3.10	4.01
	30.64	4.27	3.12	15.78	0.58	—	0.92
	44.23	14.41	10.26	8.04	—	0.89	3.34
上海市^[6-7]	12.61	7.61	5.07	7.85	1.89	0.77	0.40
上海市^[6-7]	25.50	9.83	10.35	0.90	0.68	0.38	0.82
天津市^[8-9]	29.10	15.20	16.40	11.50	3.60	2.30	1.80
天津市^[8-9]	16.00	5.40	2.10	5.10	1.80	0.80	0.70
湖北省^[10-11]	23.59	7.87	—	4.82	1.79	0.12	1.71
湖北省^[10-11]	29.80	25.60	11.70	7.80	2.60	1.70	2.10
浙江省^[12-13]	45.32	13.67	4.77	3.09	2.28	1.16	2.36
浙江省^[12-13]	72.32	17.89	4.48	2.42	0.46	1.84	2.03
福建省^[14]	40.84	18.24	4.80	0.90	0.56	2.15	1.96
河南省^[15]	31.19	11.83	6.65	6.39	5.01	1.01	1.87
河北省^[16]	18.43	4.62	1.40	2.12	11.81	0.48	0.51
四川省^[17]	30.95	18.76	8.15	8.05	4.71	0.83	4.22
陕西省^[18]	27.30	33.10	4.95	2.42	1.21	0.58	1.41
均值	32.89	15.17	7.48	6.16	2.74	1.21	1.95
标准差	12.86	7.54	4.01	4.34	2.53	0.72	1.08

配比				干燥温度/℃	干燥时间/h	预热温度/℃	预热时间/min	烧结温度/℃	烧结时间/min	表观密度/ （kg·m^-3）	吸水率/%
辅料1	添加比1	辅料2	添加比2	干燥温度/℃	干燥时间/h	预热温度/℃	预热时间/min	烧结温度/℃	烧结时间/min	表观密度/ （kg·m^-3）	吸水率/%
粉煤灰^[19，22-24]	1.50	黏土	0.50	105	1~24	300~480	10~20	1 050~1 130	6~20	365.50~660.68	14.00~68.95
	0.60	底泥	0.40
	0.29	黏土	0.43
	1.00	淤泥	0.60
黏土^[19，25-27]	0.50	粉煤灰	1.50	95~105	1~2	300~600	10~30	1 000~1 200	8~30	300.8~635.0	7.90~14.30
	4.00	钢渣	0.15
	0.21	煤矸石	0.15
	2.50	粉煤灰	2.50
页岩^[28-31]	4.00	煤灰	0.10	100~110	1~24	300~500	10~30	1 120~1 180	8~15	260~560	4.00~6.33
	4.00	淤泥	5.00
	3.33	—	—
	2.33	—	—
底泥^[25，32-34]	3.71	黏土	1.00	25或 105~120	24或 1~5	350~400	20~30	1 025~1 225	5~25	454.4~601.0	1.60~36.68
	0.54	—	—
	0.20	粉煤灰	0.60
	1.67	粉煤灰	0.67
玻璃粉^[35]	0.33	—	—	105	5	600	30	1 100	10	558.00	9.70
煤矸石^[36]	2.33	—	—	100	2	450	15	1 120	60	—	30.52
渣土^[37]	4.00	—	—	105	4	400	20	1 170	10	996.00	0.12
污泥灰渣^[38]	5.83	粉煤灰	1.50	105	24	480	15	1 060	15	—	30.02
磷石膏^[39]	4.00	—	—	25	24	—	—	1 050	15	685.78	27.34

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Inorganic Acid-Base-Salt Committee of CIESC

Research progress on preparation technology and application of municipal sludge ceramsite

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