基于分离预处理的城镇污泥原位资源化技术分析

doi:10.3969/j.issn.1674-1951.2021.12.004

华电技术 ›› 2021, Vol. 43 ›› Issue (12): 23-28.doi: 10.3969/j.issn.1674-1951.2021.12.004

基于分离预处理的城镇污泥原位资源化技术分析

王学科¹, 陈北洋², 周保卫², 穆童³, 张春苗³, 杨再威², 汪诚文

收稿日期:2021-05-07 修回日期:2021-10-11 出版日期:2021-12-25 发布日期:2021-12-10
作者简介:王学科（1975—）,男,天津人,高级工程师,从事市政污水处理技术研究和管理工作。
周保卫（1968—）,男,安徽泗县人,正高级工程师,从事发电厂和市政水处理研究和管理工作。
穆童（1987—）,男,天津人,助理工程师,从事污泥资源化研究和管理工作。
张春苗（1989—）,女,河北唐山人,从事污泥资源化研究和管理工作。
杨再威（1998—）,女,黑龙江齐齐哈尔人,助理工程师,从事市政污水处理技术研究和管理工作。
基金资助:
中国华电集团科技项目(CHDKJ21-01-52)

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

WANG Xueke¹, CHEN Beiyang², ZHOU Baowei², MU Tong³, ZHANG Chunmiao³, YANG Zaiwei², WANG Chengwen

Received:2021-05-07 Revised:2021-10-11 Online:2021-12-25 Published:2021-12-10

摘要/Abstract

摘要：

结合污水处理厂生产运行情况,增加污泥分离预处理工序段,并耦合国内主流污泥处理技术,可补足现有工艺短板,实现污泥的高效精准资源化利用。通过破坏污泥中的胞外聚合物（Extracellular Polymeric Substances,EPS）降低污泥黏性,实现对污泥有机物、无机盐类和砂组分的分离。分离后污泥有机物质量分数高于75%,热值稳定在12 MJ/kg以上,用作生物质燃料可自持燃烧;或无需添加辅料即可符合污泥堆肥的要求;或用作厌氧发酵沼气产量可提升至96.0 mL/g,且沼液浓度低,处理相对简单。分离出的铝铁盐可用作污水处理厂絮凝剂进行化学除磷,磷盐可回收作为园林绿化用磷肥原料,砂组分经脱水及自氧化干化后可用作建筑基材。

关键词: 污泥, 分离预处理, 胞外聚合物, 有机组分, 无机金属盐, 原位资源化

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

中图分类号:

TK09

王学科, 陈北洋, 周保卫, 穆童, 张春苗, 杨再威, 汪诚文. 基于分离预处理的城镇污泥原位资源化技术分析[J]. 华电技术, 2021, 43(12): 23-28.

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.

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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

基于分离预处理的城镇污泥原位资源化技术分析

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

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