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工业园区污水处理厂污泥在制造轻集料中的可持续利用

Sustainable Use of Sludge from Industrial Park Wastewater Treatment Plants in Manufacturing Lightweight Aggregates.

作者信息

Tang Chao-Wei, Cheng Chiu-Kuei

机构信息

Department of Civil Engineering and Geomatics, Cheng Shiu University, No. 840, Chengching Rd., Niaosong District, Kaohsiung 83347, Taiwan.

Center for Environmental Toxin and Emerging-Contaminant Research, Cheng Shiu University, No. 840, Chengching Rd., Niaosong District, Kaohsiung 83347, Taiwan.

出版信息

Materials (Basel). 2022 Feb 26;15(5):1785. doi: 10.3390/ma15051785.

DOI:10.3390/ma15051785
PMID:35269015
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8911275/
Abstract

The aim of this study was to investigate the development of a process for manufacturing lightweight aggregates (LWAs) by incorporating sludge from wastewater treatment plants in industrial parks with reservoir sediments. The research was divided into two stages: laboratory-scale firing and large-scale firing. In the laboratory-scale stage, a high-temperature furnace was used for trial firing. In the large-scale stage, a commercial rotary kiln was used for trial firing for mass production. The test results showed that the water absorption, dry loose bulk density, and crushing strength of the sintered LWAs were 14.2-26.9%, 634-753 kg/m, and 1.29-2.90 MPa, respectively. Moreover, the water absorption of the sintered LWAs increased as the percentage of added sludge increased. In addition, the dry loose bulk density of the sintered LWAs gradually decreased as the percentage of added sludge increased. Moreover, the results of the heavy metal toxicity characteristic leaching procedure (TCLP) dissolution test for the LWAs produced by blending 30-50% sludge were all lower than the standard value required by the Taiwan Environmental Protection Agency for general industrial waste. The strength grade of the sintered LWAs was 20 MPa. From this point of view, the sintered LWAs that were studied under the test conditions could be used as aggregates for lightweight concrete and would allow it to have a reasonable strength of greater than 20 MPa.

摘要

本研究的目的是探讨一种通过将工业园区污水处理厂的污泥与水库沉积物相结合来制造轻集料（LWAs）的工艺的开发情况。该研究分为两个阶段：实验室规模烧制和大规模烧制。在实验室规模阶段，使用高温炉进行试烧。在大规模阶段，使用商业回转窑进行大规模试烧。测试结果表明，烧结轻集料的吸水率、干松散堆积密度和抗压强度分别为14.2 - 26.9%、634 - 753 kg/m和1.29 - 2.90 MPa。此外，烧结轻集料的吸水率随着添加污泥百分比的增加而增加。另外，烧结轻集料的干松散堆积密度随着添加污泥百分比的增加而逐渐降低。而且，由混合30 - 50%污泥生产的轻集料的重金属毒性特性浸出程序（TCLP）溶解试验结果均低于台湾环境保护局对一般工业废物要求的标准值。烧结轻集料的强度等级为20 MPa。从这一点来看，在测试条件下研究的烧结轻集料可用作轻集料混凝土的集料，并使其具有大于20 MPa的合理强度。

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本文引用的文献

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Materials (Basel). 2017 Nov 10;10(11):1294. doi: 10.3390/ma10111294.
2
Mechanical and Physical Properties of Hydrophobized Lightweight Aggregate Concrete with Sewage Sludge.含污水污泥的憎水轻质集料混凝土的力学和物理性能
Materials (Basel). 2016 Apr 27;9(5):317. doi: 10.3390/ma9050317.
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Development of lightweight aggregates from stone cutting sludge, plastic wastes and sepiolite rejections for agricultural and environmental purposes.
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Materials (Basel). 2022 Nov 10;15(22):7943. doi: 10.3390/ma15227943.
利用石材切割污泥、塑料废料和海泡石废料开发用于农业和环境目的的轻质集料。
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J Environ Manage. 2012 Oct 30;109:43-53. doi: 10.1016/j.jenvman.2012.05.007. Epub 2012 Jun 7.
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Lightweight aggregate made from sewage sludge and incinerated ash.由污水污泥和焚烧灰制成的轻质集料。
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