Preparation of a novel organic-inorganic composite sludge bioflocculant (SBF) from dewatered sludge as raw material: Characteristics, flocculation mechanism and application for domestic sewage

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2024-11-05 DOI:10.1016/j.biortech.2024.131747

Jingyun Ge , Hongyu Tian , Lin Li , Yunping Han , Jianwei Liu

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Abstract

In this work, a green sludge bioflocculant (SBF) was prepared via chemical hydrolysis of dewatered sludge and applied to flocculation of domestic wastewater. The process parameters for the preparation of the SBF were 1.80 % hydrochloric acid concentration, 60 min extraction time, and 4000 r/min centrifugation speed. SBF is polymeric flocculant composed of organic and inorganic compounds. Flocculation efficiency reached 97.31 ± 0.26 % under optimal flocculation conditions. Charge neutralization promotes the surface adsorption, bridging and net trapping and sweeping of Fe (OH)₃, Al (OH)₃ and active functional groups O–H/N–H and C = O in SBF, which together achieve efficient flocculation reactions. SBF had high efficiency and stable flocculation performance for phosphorus in urban domestic wastewater, and the concentration of TP in effluent was lower than 0.30 mg/L. Therefore, SBF prepared from dewatered sludge has efficient flocculation properties and is suitable for removing pollutant phosphorus, which has good application prospects in the field of wastewater treatment.

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以脱水污泥为原料制备新型有机-无机复合污泥生物絮凝剂（SBF）：特性、絮凝机理及在生活污水中的应用。

本研究通过化学水解脱水污泥制备了一种绿色污泥生物絮凝剂（SBF），并将其应用于生活污水的絮凝。制备 SBF 的工艺参数为盐酸浓度 1.80%、萃取时间 60 分钟、离心速度 4000 r/min。SBF 是由有机和无机化合物组成的高分子絮凝剂。在最佳絮凝条件下，絮凝效率达到 97.31 ± 0.26 %。电荷中和促进了SBF中Fe (OH)3、Al (OH)3以及活性官能团O-H/N-H和C = O的表面吸附、架桥和净捕集与扫除，共同实现了高效的絮凝反应。SBF 对城市生活污水中的磷具有高效、稳定的絮凝性能，出水 TP 浓度低于 0.30 mg/L。因此，利用脱水污泥制备的 SBF 具有高效的絮凝性能，适用于去除污染物磷，在污水处理领域具有良好的应用前景。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.