Ultrafiltration Machine for All Industrial Water Treatment Projects

Ultrafiltration Machine for All Industrial Water Treatment Projects

Ultrafiltration machine is standardized membrane separation water treatment machinery widely adopted for raw water purification and industrial wastewater recovery projects globally. As a cost-effective industrial liquid filter, this complete machine can be matched with Industrial Skid Mounted Ultrafiltration Equipment, core Tubular Ultrafiltration Membrane and standard Ultrafiltration equipment to build customized filtration solutions for different water pollution levels. This paper systematically elaborates the structural composition, internal separation mechanism, unified technical indicators, strict production quality control and multi-scenario industrial applications of ultrafiltration machine, helping overseas buyers select suitable ultrafiltration machinery according to water output requirements and raw water quality conditions.

1. Product Introduction

Ultrafiltration machine is the finished integrated water filtration machine that integrates membrane modules, power pump groups, automatic backwash pipelines, chemical CIP cleaning assemblies and PLC electrical control cabinet on an integral stainless steel frame. Unlike scattered single membrane components sold separately, our ultrafiltration machine finishes all pipeline layout, component assembly and program debugging inside the factory workshop. Customers only need to connect raw water pipelines, produced water pipelines, drain pipes and power supply on-site to put the machine into formal operation, greatly shortening project construction cycles and reducing matching errors caused by self-assembly.

Our company supplies three matching collocations for ultrafiltration machine to meet differentiated working conditions. For conventional tap water pretreatment, factory domestic water and low-pollution surface water treatment, the basic finished Ultrafiltration equipment is the most economical ultrafiltration machine choice. For large-scale industrial parks, centralized wastewater stations and high-flow water production demands, the large-sized customized Industrial Skid Mounted Ultrafiltration Equipment is designed with expanded membrane arrays to meet large-volume continuous water treatment needs. When users need to treat oily wastewater, electroplating wastewater, coating wastewater and high-suspended solids waste liquid with severe membrane fouling risks, we will load anti-clogging Tubular Ultrafiltration Membrane as the core filter medium inside the ultrafiltration machine to strengthen the machine’s anti-pollution and anti-blocking performance.

The main frame of all ultrafiltration machines adopts 304 stainless steel integrated welding structure, with strong rust resistance and structural stability, applicable to indoor production workshops, outdoor sewage treatment stations and semi-open water treatment areas. The mainstream filter material of the machine is modified PVDF membrane material, which can stably intercept suspended solids, colloids, bacteria, viruses and macromolecular organic pollutants in water while retaining beneficial mineral substances in the water body. The built-in intelligent control system supports full-automatic unattended operation: the machine automatically executes backwash according to set time or pressure difference data to wash away pollutants attached to the membrane surface; when membrane flux declines obviously after long-term operation, operators can start the supporting chemical cleaning system to restore the original water production efficiency of the membrane components.

As the core pretreatment machine of pure water preparation systems, ultrafiltration machine is often arranged in the front section of reverse osmosis equipment. It effectively reduces the SDI value of inlet water for subsequent RO systems, avoids membrane fouling of reverse osmosis elements, and effectively prolongs the overall service life of the whole water treatment system.

2. Working Principle

The basic operating logic of ultrafiltration machine relies on pressure-driven cross-flow physical sieving separation. After raw water is boosted by the feed pump to the stable working pressure of 1.0 bar ~ 4.0 bar, the fluid flows tangentially at a fixed speed along the surface or inner cavity of the membrane components inside the ultrafiltration machine.

Water molecules and small molecular dissolved inorganic salts pass through the micropores of the membrane separation layer smoothly to form clean permeate water, which is collected and transported to the clean water tank through the water production pipeline. Pollutant particles, colloidal flocs, microbial colonies and organic macromolecules larger than the membrane molecular weight cutoff are trapped on the membrane surface. The high-speed tangential flow continuously scours the membrane surface, slows down the deposition speed of dirt, and most intercepted pollutants are discharged out of the machine along with concentrated water flow.

Two sets of maintenance mechanisms are embedded in the control program of ultrafiltration machine to guarantee long-term stable running. The first one is automatic periodic backwashing, which uses the clean water produced by the machine to penetrate the membrane reversely and peel off loose dirt on the membrane surface, running automatically in daily operation without manual intervention. The second one is regular CIP chemical cleaning; acid solution is used to remove inorganic scale deposits, and alkaline solution is applied to decompose organic biofilm when backwashing cannot recover rated water flux. If the ultrafiltration machine is equipped with tubular membrane elements, online sponge ball physical cleaning can be added as an auxiliary cleaning method for high-fouling wastewater treatment conditions.

3. Technical Parameters 

3.1 Core Membrane Matching Parameters

1. Standard membrane material: Modified industrial PVDF; PES membrane optional for food and pharmaceutical sanitary requirements

2. Optional MWCO specifications: 30 kDa, 50 kDa, 100 kDa

3. Design operating flux: 25 ~ 85 LMH (adjusted based on raw water pollutant concentration)

4. Allowable working temperature: 5℃ ~ 45℃ for continuous long-term operation

5. pH tolerance range: Continuous operation pH 2–11; chemical cleaning tolerance pH 1–13

3.2 Whole Ultrafiltration Machine Operating Parameters

1. Optimal stable working pressure: 1.5 bar ~ 3.0 bar

2. Comprehensive water recovery rate of the whole machine: 80% ~ 93%

3. Permeate water turbidity index: Permanently lower than 0.1 NTU

4. Bacteria interception efficiency: ≥99.99% (4-log removal rate)

5. Outlet water SDI value: ≤3, fully meeting the inlet water standard of reverse osmosis equipment

3.3 Machine Hardware Configuration Parameters

1. Frame material: 304 stainless steel integrated skid frame

2. Control system: PLC + local touch screen intelligent control with automatic fault alarm

3. Automatic backwash cycle: Adjustable range 15 minutes ~ 60 minutes

4. Recommended chemical cleaning cycle: 2 ~ 6 months according to actual raw water pollution

5. Customizable water production tonnage: 1T/h, 5T/h, 15T/h, 50T/h, 100T/h mainstream standard models

4. Product Quality & Manufacturing Standard

Every ultrafiltration machine produced by our factory implements full-process closed-loop quality inspection. Before membrane assembly, each batch of hollow fiber membranes and tubular membrane elements must pass the bubble point integrity test one by one to screen out defective products such as fiber fracture and membrane pore leakage, ensuring stable pollutant interception performance of core filter materials.

Stainless steel frame welding and internal pipeline connection adopt professional argon arc welding technology, all water-wetted contact parts use anti-corrosion materials to prevent secondary pollution to effluent quality. After the overall assembly of the ultrafiltration machine is completed, each finished machine will pass FAT factory acceptance testing before delivery; simulate real water inlet operating conditions to test water yield stability, pressure difference variation, valve action response and automatic program execution logic, and deliver products only after all test indicators are fully qualified.

Our ultrafiltration machine series has obtained ISO9001 quality management system certification, CE EU safety certification and NSF61 drinking water material safety certification. Under standardized operation and regular maintenance, the service life of built-in PVDF membrane components can reach 5–8 years, cutting the long-term replacement and maintenance costs for enterprise users effectively.

5. Application Fields

Relying on integrated installation, simple operation and stable effluent quality, ultrafiltration machine is widely used in multiple industrial and municipal water treatment scenarios:

1. Factory pure water pretreatment: Remove colloids, suspended solids and microorganisms in raw water to protect downstream reverse osmosis membranes

2. Industrial wastewater recycling: Advanced tertiary treatment of biochemical wastewater for workshop flushing, green irrigation and cooling water replenishment

3. Municipal surface water purification: Treat river water, lake water and reservoir water for factory self-provided production and domestic water supply

4. Food and beverage processing water purification: Purify production water for dairy, juice and brewing industries to remove microorganisms while retaining natural nutrients

5. Pharmaceutical purified water preparation: Remove pyrogen and endotoxin as the front-end filtration unit of pharmaceutical production water systems

6. Electroplating, printing and dyeing wastewater pre-treatment: Reduce pollutant concentration to lower the processing pressure of subsequent advanced wastewater treatment equipment

FAQ 

Q1: What core advantages does ultrafiltration machine have compared with separately purchased ultrafiltration accessories?

A: The ultrafiltration machine completes assembly, pipeline layout and program debugging in the factory. Customers only need to connect water pipes and power supply on site, which saves project construction period, matching cost and professional operation threshold, with lower overall system failure rate.

Q2: Can ultrafiltration machine remove dissolved salt and reduce the TDS value of water?

A: Ultrafiltration only intercepts particulate pollutants and microorganisms, dissolved salt ions can freely pass through membrane pores. If desalination is needed, this ultrafiltration machine must be used as pretreatment supporting reverse osmosis equipment.

Q3: How long is the service life of internal membrane components in ultrafiltration machine?

A: With regular automatic backwashing and periodic chemical cleaning, standard PVDF membrane can operate stably for 5–8 years. Replace the membrane when water flux cannot recover to normal level after complete cleaning or effluent turbidity rises abnormally.

Q4: Do I need to customize the internal configuration of ultrafiltration machine for different types of wastewater?

A: Conventional hollow fiber membrane configuration adapts to clean raw water and general sewage; oily wastewater and high-solid wastewater need to be equipped with tubular ultrafiltration membrane as the core filter material inside the machine.

Q5: Does the standard ultrafiltration machine support remote real-time monitoring of operating data?

A: The standard version is equipped with local PLC control system; remote data viewing and fault reminder functions can be added through customized communication modules according to customer requirements.

Q6: What adverse consequences will be caused if the ultrafiltration machine is not cleaned for a long time?

A: Dirt and biological film will accumulate on the membrane surface, resulting in continuous attenuation of water production flux, rising system pressure difference and deteriorated effluent quality. In serious cases, irreversible membrane fouling will occur and lead to membrane scrapping.

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