Long-term effect of phenol, quinoline, and pyridine on nitrite accumulation in the nitrification process: performance, microbial community, metagenomics and molecular docking analysis.

Phenol, quinoline, and pyridine, commonly found in industrial wastewater, disrupt the nitrification process, leading to nitrite accumulation. This study explores the potential mechanisms through which these biotoxic organic compounds affect nitrite accumulation, using metagenomic and molecular docking analyses. Despite increasing concentrations of these compounds from 40 to 160 mg/L, ammonia nitrogen removal was not hindered, and stable nitrite accumulation rates exceeding 90 % were maintained.

A review of passive acid mine drainage treatment by PRB and LPB: From design, testing, to construction.

An extensive volume of acid mine drainage (AMD) generated throughout the mining process has been widely regarded as one of the most catastrophic environmental problems. Surface water and groundwater impacted by pollution exhibit extreme low pH values and elevated sulfate and metal/metalloid concentrations, posing a serious threat to the production efficiency of enterprises, domestic water safety, and the ecological health of the basin. Over the recent years, a plethora of techniques has been developed to address the issue of AMD, encompassing nanofiltration membranes, lime neutralization, and carrier-microencapsulation.

Optimizing nitrogenous organic wastewater treatment through integration of organic capture, anaerobic digestion, and anammox technologies: sustainability and challenges.

With China's recent commitment to reducing carbon emissions and achieving carbon neutrality, anaerobic digestion and anaerobic ammonium oxidation (anammox) have emerged as promising technologies for treating nitrogenous organic wastewater. Anaerobic digestion can convert organic matter into volatile fatty acids (VFAs), methane, and other chemicals, while anammox can efficiently remove nitrogen with minimal energy consumption. This study evaluates the principles and characteristics of enhanced chemical flocculation and bioflocculation, as well as membrane separation, for capturing organic matter.