How to Choose Wastewater Treatment Mixers?
What are the common types of mixers used in wastewater treatment? 1. Submersible Mixers Mixing Series: This series is suitable for agitating liquids containing suspended solids in municipal/industrial wastewater treatment processes. It typically uses multi-stage motors with a direct-drive structure (low energy consumption and high efficiency, functioning like an energy-saving expert). Impellers are precision-cast or […]
The ORP Guide: Why, What, and How in Anoxic Tanks
ORP (Oxidation-Reduction Potential) is a vital monitoring parameter for wastewater treatment in anoxic tanks. Measured in millivolts (mV), it reveals a real-time balance between oxidizing and reducing agents in the system. By maintaining optimal ORP values, operators can effectively enhance biological nitrogen removal efficiency, stabilize treatment performance, and meet environmental compliance standards—all critical for optimizing […]
Fenton Reaction: A Brief Overview
In 1893, chemist Fenton HJ discovered that a mixture of hydrogen peroxide (H2O2) and ferrous ions (Fe2+) exhibited strong oxidizing properties, capable of oxidizing many known organic compounds such as carboxylic acids, alcohols, and esters to inorganic states, with remarkable oxidation effects.
What Causes Sludge Floatation in Secondary Clarifier Tank?
The main factors influencing sludge floatation in secondary clarifiers include water quantity and quality, temperature, pH value, dissolved oxygen, and sludge retention time.
What is Hydraulic Retention Time (HRT) and How is it Calculated?
Hydraulic Retention Time (HRT) is a term used in water treatment processes, referring to the average time that wastewater remains in a reactor, essentially the average reaction time between the wastewater and the microorganisms in the biological reactor.
How to Calculate the Head of the Pump?
The pump head represents the height at which the pump can raise water, a key performance parameter also known as the pressure head. It can be expressed as the increase in fluid’s pressure head, kinetic head, and potential head, i.e.,
H=(p2-p1)/ρg+(v2²-v1²)/2g+z2-z1
