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Application of Photocatalysis Methods to Enhance Sludge Disintegration
Waste and Biomass Valorization ( IF 3.2 ) Pub Date : 2021-01-04 , DOI: 10.1007/s12649-020-01334-5
Sayiter Yildiz , Asaad Olabi

Abstract

This paper investigated the disintegration of waste sludge with different photocatalytic processes. For this objective, the effects of initial pH, reaction time, TiO2 amount with Fe2+, Fe0 and H2O2 doses on the disintegration degree (DD) were determined. Soluble chemical oxygen demand (SCOD) was used as the main parameter in the study. Process optimizations, kinetic study and Disintegration degree calculation were performed based on the SCOD parameter. In order to observe the effect of UV light, UV-A, UV-B, UV-C lights were used, and the best DD was determined. In addition, SEM analyzes were performed to determine Particle Size Distribution, toxicity and sludge characterization in raw sludge and disintegrated sludge. As a result of optimization studies, optimum pH 3, reaction time 60 min, 6 g/kg TS Fe2+, 4 g/kg TS Fe0, 40 g/kg TS/20 g/kg TS H2O2 and 0.8 g/l TiO2 doses were obtained. The highest DD was obtained in the TiO2/Fe0/H2O2/UVB process with 69.49%, while the lowest DD value was obtained in the TiO2/Fe2+/UVC and TiO2/Fe0/UVC processes with 15.25%. Results suggest that the amount of sludge was reduced between 19.2% and 34.6% by photocatalytic disintegration. As a result, it was concluded that the Photocatalysis process is a feasible and efficient process for disintegration of sludge.

Graphic Abstract



中文翻译:

光催化方法在促进污泥分解中的应用

摘要

本文研究了不同光催化工艺对废渣的分解。为此,初始pH,反应时间,TiO 2与Fe 2 +,Fe 0和H 2 O 2的量的影响确定崩解度(DD)的剂量。可溶性化学需氧量(SCOD)被用作研究的主要参数。基于SCOD参数进行了工艺优化,动力学研究和崩解度计算。为了观察紫外线的影响,使用了UV-A,UV-B,UV-C灯,并确定了最佳DD。此外,还进行了SEM分析,以确定原污泥和分解污泥的粒度分布,毒性和污泥特性。优化研究的结果是,最佳pH为3,反应时间为60分钟,TS Fe 2+为6 g / kg ,TS Fe 0为4 g / kg ,TSH 20 O / g为20 g / kg,TS H 2 O 2为0.8克/升TiO 2获得剂量。在TiO 2 / Fe 0 / H 2 O 2 / UVB工艺中获得最高的DD,为69.49%,而在TiO 2 / Fe 2+ / UVC和TiO 2 / Fe 0 / UVC工艺中获得的最低DD值。占15.25%。结果表明,通过光催化分解,污泥量减少了19.2%至34.6%。结果,得出的结论是,光催化过程是分解污泥的可行而有效的过程。

图形摘要

更新日期:2021-01-04
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