Analysis of in-situ municipal sludge resource utilization technology based on separation pretreatment

doi:10.3969/j.issn.1674-1951.2021.12.004

Abstract

Abstract:

Sludge separation was added into pretreatment process of sewage treatment plants considering their operation status.Coupled with domestic mainstream sludge treatment technology,sludge separation can make up the existing shortcomings and realize the efficient and accurate resource utilization of sludge.Destroying the extracellular polymeric substance （EPS） in sludge can reduce the viscosity of sludge and separate organic matter,inorganic salts and sand out of sludge.After separation,the content of organic matter in sludge is more than 75%,and the calorific value is more than 12 MJ/kg.The treated sludge can be used as biomass fuel for self-sustaining combustion or sludge composting without adding auxiliary materials.And it can increase the biogas production in anaerobic fermentation to 96.0 mL/g,and lower the concentration of biogas slurry and the treatment difficulty.The separated aluminum and ferric salt are used as flocculants for chemical phosphorus removal in wastewater treatment plants.The phosphorus salt can be recycled as raw material of phosphorus fertilizer for landscaping.The sand component can be used as building material after dehydration and self oxidation drying.

Key words: sludge, separation in pretreatment, extracellular polymeric substance, organic component, inorganic metal salt, in situ resource utilization

CLC Number:

TK09

WANG Xueke, CHEN Beiyang, ZHOU Baowei, MU Tong, ZHANG Chunmiao, YANG Zaiwei, WANG Chengwen. Analysis of in-situ municipal sludge resource utilization technology based on separation pretreatment[J]. Huadian Technology, 2021, 43(12): 23-28.

Figures/Tables 12

Fig.1

Fig.2

Fig.3

Fig.4

Fig.5

Fig.6

Tab.1

Tab.2

Fig.7

Fig.8

Fig.9

Fig.10

References 17

[1]	郝晓地. 污水处理碳中和运行技术[M]. 北京: 科学出版社, 2015.
[2]	郝晓地, 方晓敏, 李季, 等. 污水碳中和运行潜能分析[J]. 中国给水排水, 2018, 34(10):11-16.
	HAO Xiaodi, FANG Xiaomin, LI Ji, et al. Analysis of potential in carbon‑netural operation of WWTPs[J]. China Water & Wastewater, 2018, 34(10):11-16.
[3]	梁远, 付岩峰, 方小锋, 等. 碳中和背景下基于AB工艺的污水处理厂能量自持分析[J]. 华电技术, 2021, 43(6):55-60.
	LIANG Yuan, FU Yanfeng, FANG Xiaofeng, et al. Energy neutral analysis of sewage treatment plant based on AB method under the background of carbon neutrality[J]. Huadian Technology, 2021, 43(6):55-60.
[4]	戴晓虎. 我国污泥处理处置现状及发展趋势[J]. 科学, 2020, 72(6):30-34,4.
	DAI Xiaohu. Applications and perspectives of sludge treatment and disposal in China[J]. Science, 2020, 72(6):30-34,4. doi: 10.1126/science.72.1854.30.b
[5]	杭世珺. 《全国城镇生活污水处理设施补短板强弱项实施方案》解读[J]. 给水排水2020, 46(9):1-3.
	HANG Shijun. Interpretation of Implementation plan for strengthening the weak points of national urban domestic sewage treatment facilities[J]. Water & Wastewater Engineering, 2020. 46(9):1-3.
[6]	LIU C, XU Y P, MA M, et al. Evaluation of endocrine disruption and dioxin‑like effects of organic extracts from sewage sludge in autumn in Beijing,China[J]. Frontiers of Environmental Science & Engineering, 2013, 8(3):433-440.
[7]	王建伟, 廖足良, 毕学军, 等. 典型城市污水处理厂污泥无机质含量及含砂率分析[J]. 环境工程, 2013, 31(S1):321-324.
	WANG Jianwei, LIAO Zuliang, BI Xuejun, et al. The analysis of the inorganic content and sand content in sludge from typical municipal wastewater treatment plant[J]. Environmental Engineering, 2013, 31(S1):321-324.
[8]	蒋心茹, 姬高升, 刘杨, 等. 市政污泥胞外聚合物(EPS)的形成过程与解聚方法研究进展[J]. 应用与环境生物学报, 2020, 26(5):1282-1289.
	JIANG Xinru, JI Gaosheng, LIU Yang, et al. Overview of extracellular polymeric substance(EPS)generation and disaggregation in municipal sewage sludge[J]. Chinese Journal of Applied and Environmental Biology, 2020, 26(5):1282-1289.
[9]	黎文威, 张晓云. 城市污泥脱水技术及脱水污泥资源化利用的研究进展[J]. 环境, 2011(S1):52-54,73.
[10]	PIRINGER M, SCHAUBERGER G. Environmental odour:Emission,dispersion,and the assessment of annoyance[J]. Atmosphere, 2020, 11(9):896. doi: 10.3390/atmos11090896
[11]	GOSTELOW P, PARSONS S A, STUETZ R M. Odour measurements for sewage treatment works[J]. Water Research, 2001, 35(3):579-597. doi: 10.1016/S0043-1354(00)00313-4
[12]	张冉, 韩博, 任健, 等. 铝对植物毒害及草本植物耐铝毒机制研究进展[J]. 云南农业大学学报(自然科学), 2020, 35(2):353-360.
	ZHANG Ran, HAN Bo, REN Jian, et al. Research progress on aluminum toxicity to plants and mechanisms of aluminum tolerance in herbaceous[J]. Journal of Yunnan Agricultural University (Natural Science), 2020, 35(2):353-360.
[13]	戴晓虎, 赵玉欣, 沙超, 等. 我国污水处理厂污泥含砂特征及成因调研[J]. 给水排水, 2014, 40(S1):75-79.
	DAI Xiaohu, ZHAO Yuxin, SHA Chao, et al. Investigation on the status and causes of sludge sand content of wastewater treatment plants in China[J]. Water & Wastewater Engineering, 2014, 40(S1):75-79.
[14]	陈全喜, 付江涛. 市政污泥耦合燃煤电厂发电关键因素分析与展望[J]. 华电技术, 2021, 43(10):50-60.
	CHEN Quanxi, FU Jiangtao. Analysis and prospect of key factors affecting the coupling of municipal sludge combustion and coal‑fired power plants[J]. Huadian Technology, 2021, 43(10):50-60.
[15]	邓易芳, 吴俊奇, 刘昌强, 等. 城市污泥资源化与源头减量化方法[J]. 应用化工, 2019, 48(5):1202-1207.
	DENG Yifang, WU Junqi, LIU Changqiang, et al. Urban sludge resource utilization and source reduction methods[J]. Applied Chemical Industry, 2019, 48(5):1202-1207.
[16]	宋艳会, 李兵, 杨培君. 污水处理厂污泥减量化技术的探讨[J]. 当代化工, 2020, 49(11):2570-2573,2578.
	SONG Yanhui, LI Bing, YANG Peijun. Discussion on sludge reduction technology for sewage treatment plant[J]. Contemporary Chemical Industry, 2020, 49(11):2570-2573,2578.
[17]	胡维杰, 赵由才, 甄广印. 德国污水污泥处理处置政策及磷回收技术解析与启示[J]. 给水排水, 2020, 46(6):15-20.
	HU Weijie, ZHAO Youcai, ZHEN Guangyin. Analysis and inspiration of sewage sludge treatment & disposal policy and phosphorus recovery technology in Germany[J]. Water & Wastewater Engineering, 2020, 46(6):15-20.

采样批次	原泥平均热值	分离后污泥热值
1	5.263	12.449
2	5.678	13.196
3	5.573	12.957
4	6.258	12.310
5	7.211	14.062
6	7.820	13.058

项目	收到基	空气干燥基	干燥基	干燥无灰基
全水分	5.70
煤样水分		6.44
灰分	26.97	26.76	28.61
挥发分	54.67	54.24	57.97	81.20
固定碳	12.66	12.56	13.42	18.80