Related Experiment Video
Updated: Jun 29, 2026

Quantification of Humic and Fulvic Acids in Humate Ores, DOC, Humified Materials and Humic Substance-Containing Commercial Products
Published on: March 18, 2022
[Removal efficiency and mechanism of aqueous humic acids by activated sludge process]
Fang Fang1, Guo-qiang Liu, Jin-song Guo
1Key Eco-Environment of Laboratory of Three Gorges Reservoir Region Ministry of Education, Chongqing University, Chongqing 400045, China. xiduo@tom.com
Abstract:
The removal efficiency of aqueous humic acids by a single-stage activated sludge process and a two-stage activated sludge process was studied using synthetic wastewater, and the removal mechanism was explored by testing the element composition of the sludge, relative content ofhumic acids in sludge, sludge activity and the molecular weight distribution of humic acids in influent and effluent. In the single-stage activated sludge process, the removal efficiency of aqueous humic acids was keeping between 67%-84%, decreasing with the enhancement of humic acids content in the influent, and the different content of humic acids in the influent would not affect the removal efficiency of biodegradable organic matter. In the two-stage activated sludge process, the removal efficiency of humic acids in the first stage was 71.3%, better than that (60.1%) in second stage, and the removal efficiency of larger molecular humic acids was better than the smaller. Mechanism study indicated that humic acids was very difficult to be used by microorganism as carbon source, and removed by excess sludge discharge through adsorbed by activated sludge.
More Related Videos
15:19Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
07:34Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
Published on: June 15, 2014
Related Concept Videos
Biological Treatment of Effluent and Waste Water
Microbial Wastewater Treatment
Microbial Bioremediation of Uranium
Coagulation
Factors Affecting Solubility
Extraction: Advanced Methods