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Beijing Qinrunze Environmental Protection Technology Co., Ltd. News

Two-Stage DTRO Disc Tube Reverse Osmosis Industrial Wastewater Treatment System

Disc Tube Reverse Osmosis (DTRO) has become a reliable membrane technology for tackling difficult industrial wastewater and landfill leachate. Benefiting from its unique open flow channel structure, DTRO creates strong turbulent flow inside membrane stacks, delivering outstanding anti-fouling ...

July 22, 2026
Chemicals for Reverse Osmosis Systems: Coagulants, Scale Inhibitors, Biocides, Reducing Agents — Complete Breakdown of D

To maintain stable operation of a reverse osmosis (RO) system, auxiliary chemicals are indispensable alongside well-designed membranes and process layouts. These include coagulants, scale inhibitors, biocides, reducing agents, pH adjusters, each with a designated dosing location and unique function. ...

July 20, 2026
Microbial Community of Activated Sludge Process and Sludge Formation Mechanism Series on Application of Wastewater Treat

I. Overview of Wastewater Biological Treatment Systems Modern biological wastewater treatment is generally divided into three stages: Primary Treatment (Physical Treatment): Bar screen interception, primary sedimentation tank Secondary Treatment (Biological Treatment): Aeration tank, final ...

July 13, 2026
Why RO Membranes Require Acid Cleaning First Followed by Alkaline Cleaning, and Can the Sequence Be Reversed?

For chemical cleaning of reverse osmosis (RO) membranes, the sequence of acid cleaning first then alkaline cleaning must be strictly followed. This order cannot be reversed under any circumstances; otherwise, contaminants will solidify and membrane fouling will be aggravated. The reasoning can be ...

July 9, 2026
Wastewater Treatment Equipment for Southeast Asia Market

Our integrated wastewater treatment systems adopt mature A²/O biochemical and DTRO membrane technologies, tailor-made for Southeast Asia’s humid, high-temperature climate, diverse industrial wastewater and tight local emission standardsbluewaterl.... Containerized compact design saves construction ...

July 8, 2026
A²/O Process – Brownish Yellow Viscous Foam (In-depth Analysis)

I. Typical Phenomena The foam is brownish yellow/tawny, highly viscous, hard to break and accumulates in large volumes on the aeration tank surface. Meanwhile, the activated sludge appears yellowish with fine flocs. II. Root Causes (Sorted by A²/O Operating Conditions) 1. Excessive Organic Loading ...

July 7, 2026
DTRO Wastewater Treatment System: Efficient Solution for High-Concentration Effluents

The Disc Tube Reverse Osmosis (DTRO) system is a specialized membrane technology designed to treat high-salinity, high-pollutant wastewater that conventional reverse osmosis cannot handle efficiently. Its unique disc-tube module structure allows operation at pressures up to 120 bar, making it ideal ...

July 6, 2026
Two-Stage DTRO Disc Tube Reverse Osmosis Wastewater Treatment Equipment: Advanced Solution for High-Concentration Wastew

Disc Tube Reverse Osmosis (DTRO) is a cutting-edge membrane separation technology specially developed for complex, high-salinity and heavily polluted wastewater that conventional spiral-wound reverse osmosis cannot handle stably. The two-stage DTRO system, as an upgraded integrated solution, ...

July 3, 2026
Thick Scum Layer in Aerobic Tank of Chemical Wastewater Treatment with Qualified Effluent

Scum floating on the surface falls into two core categories: floating of activated sludge itself (sludge bulking, denitrification flotation) and scum formed by inert impurities plus dead bacterial flocs (sludge aging, abnormal organic loading, flocculation with grease). Chemical wastewater is far ...

July 1, 2026
Why RO Membrane Cleaning Follows Acid Washing Prior to Alkaline Washing

Under working conditions of RO membranes contaminated by composite pollutants consisting of inorganic scaling, organic matter and algae, the unified industrial standard cleaning sequence is acid washing first (to remove inorganic hard scale), followed by alkaline washing (to eliminate colloids, ...

June 26, 2026
Introduction to SBR Process Background

1. What is the SBR process? The SBR process, short for Sequencing Batch Reactor Activated Sludge Process, is a wastewater treatment technology that utilizes microorganisms to operate intermittently in a reactor according to a specific time sequence. Unlike traditional continuous-flow activated ...

April 8, 2026
"20 Years of Excellence in Industrial Wastewater Treatment: Your Reliable Global Partner"

As a 20-year established manufacturer specializing in industrial wastewater treatment equipment, we are committed to providing world-class solutions that prioritize quality, affordability, and innovation. With a proven track record of serving clients across diverse industries, our advanced ...

April 7, 2026
How to clean reverse osmosis membranes: should acid cleaning come before alkaline cleaning or vice versa?

Reverse osmosis (RO) membrane technology has been widely applied in fields such as seawater desalination, wastewater treatment, and industrial wastewater reuse. However, membrane fouling remains a critical factor limiting the long-term stable operation of reverse osmosis systems. During operation, ...

April 3, 2026
DTRO Wastewater Treatment: Efficient Purification for Challenging Effluents

Disc Tube Reverse Osmosis (DTRO) is an advanced membrane technology transforming wastewater treatment, particularly for high-strength industrial and municipal effluents. How It Works: DTRO utilizes specialized disc-shaped membranes with wide flow channels (up to 4mm) to withstand fouling. High...

April 2, 2026
Sewage Treatment: A Vital Solution for Cleaner Water and a Healthier World

Sewage treatment plays a crucial role in safeguarding public health and the environment. This process purifies wastewater, making it safe to reuse or discharge back into nature.The Treatment Process:Primary Treatment: Removes large solids through physical methods like screening and settling...

April 1, 2026
The difference between using hydrolysis acidification + A²O and directly using the A²O process for slaughterhouse wastew

1. Characteristics of slaughterhouse wastewater quality (prerequisite for direct A²O) • High-concentration organic matter: COD 3000–8000 mg/L, BOD 1500–4000 mg/L, B/C≈0.5–0.6 (good biodegradability) • High SS, high oil content: SS 1000–3000 mg/L, animal and vegetable oil >500 mg/L, containing meat ...

March 31, 2026

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