As wastewater discharge standards continue to become more stringent, many municipal and industrial treatment plants face increasing challenges such as limited tank volume, insufficient nitrification capacity, and unstable biological performance under fluctuating loads. Integrated Fixed-Film Activated Sludge (IFAS) technology has…
In conventional wastewater treatment practice, Mixed Liquor Suspended Solids (MLSS) has long been used as a primary indicator of biological system performance. Historically, many engineers assumed that activated sludge systems naturally developed a relatively stable microbial community composed of the…
The secondary clarifier is a key unit in wastewater treatment systems for solid-liquid separation, mainly responsible for separating activated sludge from the effluent after the aeration tank, ensuring that the treated water meets environmental discharge standards. However, in practice, floating…
Redox Potential (ORP) in Wastewater Treatment: An Engineering Perspective Redox potential, also known as Oxidation-Reduction Potential (ORP), is a fundamental parameter in wastewater treatment that quantifies the water’s ability to either donate or accept electrons. In practical terms, ORP reflects…
Modern industrial and municipal wastewater often contains complex chemicals, pharmaceutical residues, pesticides, personal care products, industrial chemicals, and organic pollutants. These contaminants not only damage ecosystems but also pose long-term public health risks. Chemical pollutants in wastewater are often colorless,…
In activated sludge wastewater treatment plants, the aeration system is the core component supporting biological processes. The membrane sheets in fine-bubble diffusers directly determine oxygen transfer efficiency (OTE), energy consumption, cleaning frequency, and overall system reliability. Ethylene Propylene Diene Monomer…
The Moving Bed Biofilm Reactor (MBBR) is one of the core technologies in modern wastewater treatment. It efficiently removes organics, ammonia nitrogen, and other pollutants through biofilm attached to suspended carriers. The Surface Area Loading Rate (SALR) is the most…
