China Wastewater Screen Manufacturers Suppliers Factory - Custom Wastewater Screen

Your Professional Water intake screen Supplier

ROCKERHILL is established in China from 2011 originally, with 15 years of development and improvement, today ROCKERHILL has formed the core businesses in design and engineering, manufacturing and modularization, contracting and services in water conservation and water treatment industry.With a manufacturing hub of 17,000 square meters in JiangSu China, and more than 30 professional technical staffs, and 20 professional senior engineers and national registration engineers, we provide sustainable values and services to our domestic and international customers by utilizing our extensive experiences and integrated competitiveness in design and engineering, technical package, procurement services and project contracting.

Rotary Drum Screens
A Rotary Drum Screen by is a continuous, self-cleaning mechanical filtration device designed for fine screening applications in water and wastewater treatment. It consists of a rotating cylindrical drum covered with a filtration screen,...
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Multi-Rake Bar Screens
A Multi-Rake Bar Screen by ROCKERHILL is a heavy-duty, continuous mechanical screening device engineered for the preliminary treatment stage of water and wastewater intake. It is designed to remove large, coarse, and fibrous solids from...
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Bar Screens For Sea Water Desalination
A ROCKERHILL bar screen is a fundamental and robust mechanical screening device used at the very front end of a sea water desalination plant's intake system. It functions as the first line of defense, designed to remove large, coarse...
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Band Screens For Sea Water Desalination
ROCKERHILL band screen is a continuous, self-cleaning mechanical filtration device used primarily at the intake stage of sea water desalination plants. It consists of a series of screen panels (or plates) connected together to form a...
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Mechanical Bar Screen
Mechanical bar screens are automated debris-removal systems used in water treatment plants, wastewater facilities, and hydraulic projects to intercept large solids (e.g., trash, branches, rags, and sediment) before they reach downstream...
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Bar Screen Design
Bar screen design refers to the engineering and configuration of mechanical or manual systems used to intercept large debris in water and wastewater flow channels.
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Band Screening for Water Treatment
Screening for water treatment refers to the use of automated, belt-driven filtration systems designed to remove fine to medium-sized debris from water streams in treatment plants.
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Band Screen Design
Band screen design focuses on engineering automated, belt-driven filtration systems optimized to capture fine to medium-sized debris in water and wastewater treatment applications.
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Step Screen Wastewater
Step screen wastewater systems are specialized, automated filtration devices designed to remove solids from wastewater streams in municipal, industrial, and commercial treatment plants.
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Mechanical Screen Wastewater
Design: Vertical or inclined bars with a motorized rake that ascends/descends to scrape debris.
Best For: Municipal wastewater with high volumes of rags and fibrous materials.
Spacing: 10–50mm (standard) or 3–10mm (fine)...
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Step Screen Design
Teeth are angled at 45°–60° to grip fibrous materials (e.g., rags, hair) without tearing, ensuring secure transport.
Tooth spacing is customizable: 3–5mm for fine solids (e.g., food particles), 5–10mm for general wastewater...
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Fine Screen Design
Fine screens are critical components in wastewater treatment systems, engineered to remove fine solids (0.2–6mm) while maintaining efficient flow and protecting downstream processes.
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Why Choose Us

In-Depth Solution

From beginning, our team paid special attention to the ability to "see customer needs", based on the understanding of the essential needs of customers to study, analyze and discuss the feasibility of the program, we have been committed to presenting customers with more than expected solutions!

Reliable Technology

Our team has the design capabilities of customized and industrial scale projects, and has extensive technical experience to provide technical services to many large manufacturing plants around the world!

Fast Services

Whether the warranty period has passed, whether it is an accident or an unexplained cause, our systems and processes are designed around "fast service". We believe: service is action, fast service is "fast action"!

Water intake screen

Fine screens are a crucial component in sewage treatment plants and wastewater treatment facilities. They play a significant role in the preliminary treatment stage by removing smaller solid particles, debris, and materials from the wastewater stream before it undergoes further treatment processes.

Item Model	Equipment Width B1(mm)	Canal Width B(mm)	Efficiency of passing through water				Power(kw)
			Grid Gap(mm)				Canal Depth(m)
			3mm	5mm	10mm	15mm	1.5(m)-5(m)-7.5(m)
XQ0.4	300	400	0.27	0.36	0.48	0.54	0.37	0.37
XQ0.5	400	500						0.55
XQ0.6	500	600					0.55
XQ0.7	600	700
XQ0.8	700	800						0.75
XQ0.9	800	900					0.75
XQ1.0	900	1000						1.1
XQ1.1	1000	1100					1.1
XQ1.2	1100	1200
XQ1.3	1200	1300						1.5
XQ1.4	1300	1400					1.5
XQ1.5	1400	1500

Features of Water intake screen

Protecting Critical Equipment

Prevents hair, fibers, and other debris from entanglement in pump impellers and aerators, and prevents clogging of membrane modules in membrane bioreactors (MBRs), significantly reducing equipment maintenance costs and downtime risks.

Improving Subsequent Treatment Efficiency

Removing these difficult-to-settle fine suspended solids reduces the load on subsequent biochemical treatment units and sedimentation units, improving final effluent quality.

Reducing Sludge

Effectively removes lightweight materials that easily form sludge, resulting in a more stable water treatment process and improved sludge properties.

Recycling Potential

In some industrial applications (such as papermaking and food processing), screened waste residues may contain recyclable materials.

Type of Water intake screen

Bar Screens

These consist of vertical or inclined bars spaced to intercept and retain debris. They are suitable for large and medium-sized debris removal.

Fine Screens

Fine screens are designed to capture smaller particles, such as grit, hair, and plastics. They use finer mesh or perforated plates to achieve this.

Drum Screens

Drum screens are rotating cylindrical devices with fine mesh or perforated plates that capture and remove solids as wastewater flows through them.

Step Screens

Step screens feature a series of fixed or movable steps, creating a barrier that captures and lifts solids out of the wastewater.

Applications of Water intake screen

Especially those using the MBR membrane process, fine screening is an essential standard pretreatment unit, with screen gaps typically required to be ≤2mm.

Industrial Wastewater Treatment

Wastewater from industries such as papermaking, food and beverages, slaughtering, and textiles contains large amounts of fiber and organic residues.

Pump Stations

Protect pumps and prevent clogging.

Reclaimed Water Reuse Systems

Serves as a pretreatment unit for advanced treatment.

Design of Water intake screen

Solids Loading

Analyze the concentration and characteristics of solids in the influent to estimate the amount of debris the screen will encounter.

Screen Openings

The size and shape of screen openings depend on the type and size of solids expected in the wastewater.

Screening Capture Ratio (SCR)

SCR is the percentage of solids captured by the screen, and it should be maximized for effective screening.

Hydraulic Headloss

Ensure that the screen design minimizes headloss to maintain the desired flow rate.

Flow Rate

Calculate the average and peak flow rates to determine the required capacity of the screen.

Screen Grid Velocity

The speed at which the wastewater flows through the screen openings.

Effect of Water intake screen

Primary Functions of Fine Screens

Fine screens help clean wastewater by catching small trash and particles. They trap solids, plastics, and fibers that could harm the treatment process. By removing these items, fine screens make the water cleaner and easier to handle in later steps.
These screens can remove up to 95% of unwanted materials. This prevents clogs and reduces damage to pumps and other tools. With fewer repairs needed, the system works better and lasts longer. Fine screens also keep water flowing steadily, improving the next stages of treatment.

Position in the Treatment Process

Fine screens are placed at the start of wastewater treatment. They stop debris from reaching and damaging sensitive equipment. By catching waste early, fine screens protect the entire system.
Static fine screens lower the amount of solids entering later stages. This makes the system more efficient and reduces the chance of equipment breaking. Adding fine screens to your setup creates a stronger and smoother process.

Compliance with Environmental Regulations

Wastewater plants must follow strict environmental rules. Fine screens help by cleaning water and protecting equipment. They stop clogs and damage, keeping operations steady and reliable.
Communities using advanced screens often meet rules more easily. For example, one town improved water quality with fine screens, helping residents stay healthy. Using fine screens not only meets regulations but also supports a cleaner environment.

Working Principle of Water intake screening

Screening
Wastewater is pumped or gravity-fed into the feed inlet of the fine screening equipment. Once in contact with the screen, gravity, pressure, or level differentials force the water (and particles smaller than the mesh size) through the gaps between the meshes, resulting in "screened water" that flows into subsequent treatment processes (such as grit chambers or biochemical tanks).

Interception
Suspended and floating matter in the wastewater that is larger than the mesh size (such as hair, fibers, plastic flakes, and food debris) cannot pass through the screen and is retained on (or within) the screen, forming "residue."

Residue Cleaning
This is crucial to ensuring continuous operation of the equipment. During operation, the screen will continually become clogged with residue and must be cleaned promptly. The equipment uses a rotating or stepping motion to remove the portion of the screen with residue from the liquid surface. Most fine screens are equipped with a high-pressure water flushing system that uses spray water to remove and collect the residue from the screen. Some equipment uses mechanical cleaning methods such as brushes or scrapers.

Discharge
The washed or cleaned rejects (a solid waste with a high moisture content) are collected in a sump. The equipment typically incorporates a screw conveyor or uses gravity to lift and discharge the rejects into a designated container (such as a hopper or transport vehicle) for subsequent processing (e.g., shipping or dewatering).

FAQ

Q: Do you provide OEM service?

A: Yes. Any required logos is available.

Q: Do you offer after-sales service?

A: Yes. Engineers available.

Q: How long is your warranty?

A: One year after the arrival of the goods. During this period, as long as it is not a man-made damage, we send the damaged parts free of charge.

Q: What about your delivery Time?

A: Normally within 45 days against down payment.

Q: What about the package of your export product?

A: We use anticorrosion wooden case with foam inside.

Q: What kind of payment do you accept?

A: T/T, L/C, PAYPAL, Cash, D/P, D/A, WESTERN UNIION, MONEYGRAM

Q: What kind of transportation do you offer?

A: Customers decide freight mode, Air, Land & Sea .

We're professional wastewater screen manufacturers and suppliers in China, specialized in providing high quality custom service. We warmly welcome you to buy high-grade wastewater screen at competitive price from our factory.