GN Decanter Centrifuges Revolutionize Starch Separation for Potato Slices Flushing Water Recycling

GN Centrifuge is recently used in a new application in a domestic company in China, which is for separating the waste water after potato slices flushing water in order to recycle the water. 

About GN Separation.

1.A revolutionize solution: As the global potato processing industry scales up production of potato slices, crisps, and frozen potato products, sustainable water treatment and resource recovery have become core priorities for manufacturers worldwide. Traditional potato slice flushing processes generate massive volumes of starchy wastewater rich in fine potato starch particles, soluble proteins, and organic residues. For decades, this wastewater was either discharged after simple treatment or discarded directly, leading to severe resource waste, high water pollution load, and increased operational costs for food factories. Today, the widespread adoption of decanter centrifuges dedicated to potato slices flushing water starch separation is reshaping the environmental and economic efficiency of the potato processing sector, bringing a mature, high-efficiency solution for starch recycling and industrial water reuse.

Potato slice flushing is an indispensable procedure in potato deep processing.

2.About the composition of water: After peeling and slicing, fresh potato slices carry abundant free starch on their surface. High-pressure water flushing is used to remove excess starch to prevent adhesion during frying or freezing and ensure the crisp texture of finished products. The resulting flushing water forms a dilute starch slurry with fine suspended starch particles, which are difficult to separate through traditional sedimentation and filtration methods. Natural sedimentation requires large-scale sedimentation tanks and long processing cycles, while conventional filter devices are prone to clogging by fine starch powder, resulting in low separation efficiency and unstable treatment effects. These technical bottlenecks have long restricted the green upgrading of potato processing enterprises.

3.Role of Decanter centrifuges: as advanced horizontal spiral centrifugal separation equipment, perfectly solve the pain points of potato flushing water treatment through precise centrifugal separation technology. The core working principle relies on high-speed rotational motion to generate powerful centrifugal force. When the starchy flushing water enters the rotating bowl of the decanter centrifuge, solid starch particles with higher density are quickly thrown to the inner wall of the bowl under centrifugal action. The built-in spiral conveyor pushes the concentrated solid starch sediment toward the conical discharge end for automatic discharging, while the purified light-phase water flows out from the liquid outlet. This continuous two-phase separation process realizes one-step efficient separation of starch solids and industrial washing water.

As a professional manufacturer of decanter centrifuges, GN Separation is your ideal choice as a supplier. 

GNLW554 Dewatering Centrifuge Package for Overseas WWTP

Among numerous water treatment equipment, the combination of decanter centrifuge and polymer dosing unit has emerged as a mainstream integrated solution for solid-liquid separation and sludge dewatering in wastewater treatment. GN Separation is a leading brands for manufacturing this combination, and recently just fabricated a GNLW554 Centrifuge matched with a polymer dosing for a waste water treatment plant.

1. The decanter centrifuge lays the core foundation for high-efficiency wastewater purification by virtue of its unique mechanical separation principle. Different from conventional filtration and sedimentation equipment that relies on natural gravity, the horizontal decanter centrifuge generates powerful centrifugal force through high-speed rotation of the drum and screw conveyor. In the closed rotating cavity, solid suspended particles, sludge impurities and other heavy substances in wastewater are rapidly thrown to the drum wall and compacted into solid cake, while clean water converges in the central area and is discharged through the overflow port, realizing continuous and automatic solid-liquid separation .

2.As a supporting core equipment, the polymer dosing unit is the key to optimizing the separation effect of the decanter centrifuge and reducing operational costs. Wastewater contains a large number of tiny colloidal particles and suspended solids with stable dispersion, which are difficult to settle and separate relying solely on centrifugal force. The automatic polymer dosing unit accurately prepares and quantitatively injects polymer flocculant into the wastewater pipeline according to real-time water quality and flow parameters . The polymer molecules adsorb tiny dispersed particles in the water, bridging and aggregating them into large-diameter dense flocs. These formed flocs have higher specific gravity and better settleability, which greatly improves the centrifugal separation efficiency of the decanter centrifuge, avoids fine particle leakage, and significantly enhances the clarity of discharged water . Moreover, the intelligent dosing system realizes precise dosage control, effectively reducing polymer consumption, avoiding chemical waste, and lowering the overall operating cost of wastewater treatment .

GNLS3661 Large Linear Vibrating Screen for Domestic Mining Company

A customized heavy-duty large linear vibrating screen tailored for large-scale mineral processing has been officially commissioned at a core production base of a top-tier domestic mining company in central China, marking a major upgrade of the enterprise’s ore classification, dewatering and impurity removal production lines. Independently developed and manufactured by a professional Chinese mining screening equipment manufacturer, GN Separation, this new-generation linear vibrating screen breaks the bottlenecks of low throughput, high failure rate and high energy consumption of traditional screening equipment, helping domestic mining enterprises accelerate intelligent, green and high-efficiency mineral processing transformation amid China’s dual-carbon goals and mining industry standardization upgrading.

1.Background:Benefiting from booming domestic demand for iron ore, copper ore, coal gangue and aggregate raw materials, China’s inland mining bases have expanded annual ore processing capacity year by year in recent years. However, most conventional circular vibrating screens and small-size linear screening devices cannot adapt to 24-hour continuous heavy-load operation under harsh mining working conditions, including high dust, high humidity and strong material abrasion.

2. Advantages of GNLS3661 and other similar models: Pain points such as uneven particle grading, frequent screen mesh blockage, short equipment service life and high daily maintenance costs have long restricted the production efficiency and profit margin of medium and large domestic mining groups. Targeted at the on-site working parameters and process flow of the cooperating mining enterprise, the R&D team optimized the overall mechanical structure, vibration system and intelligent control module to launch this industrial-grade large linear vibrating screen specially for domestic open-pit and underground mineral processing scenarios.

3.Some other features: This flagship large linear vibrating screen adopts an integrated welding-free riveting structure made of high-strength manganese alloy steel plate, eliminating welding residual stress and enhancing overall structural impact resistance. Different from ordinary screening equipment, it is equipped with dual box-type synchronous vibration exciters and high-elasticity rubber damping springs, realizing stable linear vibration trajectory with adjustable vibration frequency and screen deck inclination angle. 

GN Solids – 2 Sets of Drilling Rig Solids Control Systems Exported to Middle East & Europe

In the past 15+ years, GN Solids Control has exported drilling rig solids control systems to more than 70 countries in the world. A drilling rig solids control system, also known as a mud purification system, is an indispensable auxiliary unit for onshore and offshore oil, gas and geothermal drilling operations. Its core mission is to continuously separate harmful solid cuttings from drilling fluid (mud), recover usable mud, minimize raw material waste, protect drilling equipment, lower operational costs and meet international environmental discharge standards. For any drilling rig, the performance of drilling rig system is vital for the drilling rig’s work and service life.

A full standard solids control system follows a multi-stage hierarchical separation logic from coarse particles to ultrafine powder, consisting of shale shakers, vacuum degassers, desanders, desilters, decanter centrifuges, mud agitators, mud guns, mud tanks and matching mixing equipment. Each device undertakes an irreplaceable separation or circulation function.

1. The first-stage processing equipment is the shale shaker, the primary screening device directly receiving mud discharged from the wellhead. Equipped with high-strength vibrating screens of different mesh sizes, it removes large rock cuttings, gravel and coarse drill solids larger than 74 microns through mechanical vibration.

2. After primary screening, mud may contain a large volume of entrained air and gas from underground formations, which leads to reduced mud density, unstable well pressure and risks of blowouts. The vacuum degasser serves as the second-stage purification unit to eliminate gas bubbles inside drilling fluid.

3. Third-stage separation relies on hydrocyclone combinations: desanders and desilters. Driven by centrifugal pumps, desanders process particles ranging from 44 to 74 microns while desilters are used for 20 to 40 microns. These two cyclone devices greatly reduce the solid content of mud before fine separation, lightening the working load of centrifuges.

4. The fourth and most precise separation equipment is the decanter centrifuge, targeting ultrafine solid particles below 10 microns. High-speed rotation generates extreme centrifugal force to separate tiny clay powder and colloidal solids.

5.To maintain uniform mud concentration and prevent solid sedimentation in circulation tanks, mud agitators and mud guns are installed across all tank compartments. Supporting mixing systems including jet mud mixers and chemical hoppers prepare new mud by blending bentonite, barite and treating agents on-site, supplementing mud lost with discharged cuttings.

For all above mentioned equipment and whole system, GN Solids Control can propose the turn-key solution and GN has rich experiences on this. 

GN 14 Inch Sludge Dewatering Centrifuge Package for Southeast Asia Client

As global wastewater discharge regulations grow stricter, sludge dewatering has become a core link in municipal and industrial sewage treatment. The horizontal decanter centrifuge package, as an integrated, high-efficiency solid-liquid separation system, is gaining widespread adoption for sludge dewatering, thanks to its unique mechanical principles and functional advantages.

The core of the system is the horizontal screw decanter centrifuge, which works on centrifugal sedimentation principles. High-speed rotation of the drum generates strong centrifugal force (up to thousands of times gravity), rapidly separating solid particles from liquid in sludge. The tapered screw conveyor continuously moves dewatered sludge cake toward the discharge end, while clarified liquid flows out from the other side. This continuous, fully enclosed operation is its primary strength for sludge treatment. Why is it especially suitable for sludge dewatering?

First, it delivers superior dewatering performance. It handles sludge with 1%–10% solid content (typical for municipal sludge) efficiently, reducing moisture content from 98% to 75%–80%—far drier than results from belt filter presses.

Second, it excels at fine particle capture, separating particles as small as 5μm, which traditional methods struggle with. Third, its compact, modular design integrates centrifuges, chemical dosing units, pumps, and PLC control systems into a skid-mounted package, saving 2/3 of floor space versus conventional setups. Operational reliability and cost-effectiveness further boost its suitability. The system runs 24/7 continuously without frequent shutdowns, ideal for large-volume sludge treatment. Its fully sealed structure prevents odor leakage and sludge splashing, ensuring a clean working environment. With automated PLC control, it adjusts parameters (drum speed, differential speed, polymer dosage) in real time, cutting labor costs reducing flocculant consumption.

For example, a Southeast Asian municipal plant adopted the GN Separation's 14-inch decanter centrifuge package in a recent project.