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Screw Screen

The Screw Screen (Product ID: SS) is an effective solution for screening solids from raw sewage and industrial wastewater. Designed for installation in a concrete channel, this system is available with or without a compaction system, which is designed to reduce the weight and volume of captured screenings. The integrated compactor, located at the end of the transport section, efficiently washes, compacts and dewaters the screenings.

This innovative system offers low maintenance and requires minimal initial investment, making it a cost-effective option for wastewater treatment. The Screw Screen has a self-cleaning screen basket, with brushes fitted along the screw that continuously remove debris from the screen element surface, ensuring high solids removal efficiency. It can reduce the volume and weight of screenings by up to 50% after compaction. The transport section is available in either tubular or U-section designs, with flexible length options to suit various installation needs.

Key manufacturing features include a treatment capacity of up to 1,250 m³/h, which supports high-demand operations. The screen element is offered in two options: rounded holes ranging from 3 to 10 mm or wedge wire ranging from 0.25 to 3 mm. These customisable features makes the Screw Screen a trusted, efficient choice for screening raw sewage and industrial wastewater.

Technical Specifications

Standard Specifications

Parameter			Units	SS-mK-110	SS-mK-160	SS-mK-260	SS-mK-390	SS-mK-610	SS-mK-830	SS-mK-1000
Treatment capacity*¹	With rounded holes (mm)	Ø3	m³/h	80	122	158	320	502	690	865
		Ø4		93	137	218	360	528	756	920
		Ø5*²		108	158	259	390	612	830	1,000
		Ø6		126	164	288	430	630	850	1,070
		Ø7		137	183	310	468	730	905	1,160
		Ø10		158	194	333	495	790	970	1,250
	With wedge wire (mm)	0.25		17	34	75	115	180	220	290
		0.5		45	64	95	170	300	340	385
		1		50	81	135	252	350	430	590
		2		85	100	145	303	430	580	785
		3		112	125	187	340	505	730	900
Dimensions	W - Channel min/max		mm	300/477	358/542	470/620	570/718	740/888	875/975	1,065/1,167
	H	35˚		410	420	430	550	660	800	860
	H	45˚		515	535	540	705	838	985	1,050
	A*³			5,124	5,124	5,124	5,124	6,040	6,040	7,840
	B			4,075	3,975	4,044	3,990	4,512	4,510	4,680
	C			3,040	2,990	3,035	2,980	3,735	3,770	3,650
	D			800	800	800	800	1,000	1,000	1,000
	S			1,500	1,500	1,500	1,500	1,500	1,500	1,500
Installed motor power			kW	0.75	0.75	0.75	0.75	0.75	0.75	1.1
Screw gear reducer speed			rpm	11	11	11	11	8	8	8
Washwater Screen basket / compaction zone (at 3 bar)			L/min	23/31	23/31	23/31	23/31	62/44	62/44	78/56
Empty weight (standard length)			kg	300	318	325	350	608	642	1,100

*¹Theoretical, calculated using clean water, *²Standard screen type & aperture, *³Transport section can be lengthened or shortened, which will affect other dimensions.

Standard Inclusions and Options

✓ = Standard Supply- = Not Applicable

Equipment			Standard Supply	Optional Supply
Screw screen	Rounded holes screen element	Ø5mm aperture	✓	-
	Rounded holes screen element	Custom aperture (3, 4, 5, 6 ,7 or 10mm)	-	✓
	Wedge-wire screen element (0.25, 0.5, 1, 2 or 3mm)		-	✓
	Integrated screenings compaction (can be deleted as an option)		✓	-
	Screen basket cleaning, bolted nylon brushes		✓	-
	PE pipe for returning liquid from compaction zone		✓	-
	Squared outlet spout		✓	-
	Bolted screenings compaction system cover		✓	-
	Lifting eyebolts		✓	-
	Nord drives with compact motor gearbox and cover guard		✓	-
Machine carpentry, drive guard and anti-wear materials on screw		SS304, bolts A2	✓	-
		SS316, bolts A4 (recommended for coastal and corrosive environments)	-	✓
Screw	High-carbon steel painted		✓	-
	SS316L		✓	-
	Lengthen or shorten the standard screw transport section		-	✓
Washing	Compaction zone only, with ½” manual valve		✓	-
	Compaction zone with ½” manual valve and screening basket with 1” manual valve		-	✓
	Manifold for compaction zone and screening basket, with 1” manual valve		-	✓
Automatic Longopac bagging system for screenings with 1x 80m long bag			-	✓
Drive motor premium efficiency		IP55	✓	-
Drive motor premium efficiency		IP65 with thermistor overload protection	-	✓
Surface treatments*1			✓	-

*¹Stainless steel parts: stripping with acid solution, passivation with glass particles, final surfaces cleaning with anti-dust oil. Carbon steel parts: sandblasting SA 2.5 for external anti-rust paint RAL 5015

Instrumentation & Controls		Standard Supply	Optional Supply
Safety limit switch for compaction zone opening hatch		-	✓
Level sensor, supplied loose for channel installation	Conductive probe	-	✓
Level sensor, supplied loose for channel installation	Ultrasonic	-	✓
Solenoid valve kit(s) for selected washing system(s) 24VDC		-	✓
Mechanical over-torque protection (backlash free-ball model)		-	✓
Control panel to AS/NZ 3000, for external installation		-	✓

Disclaimer: We continuously update and improve our products and services, contact us for more detailed information or to confirm specifications. MAK Water takes no responsibility for any errors resulting from the use of information contained on this website.

Screw Screen for STP Inlet Works Upgrade

Municipal

A northern NSW regional Council was seeking to upgrade their sewage treatment plant inlet works by replacing an old step screen that reached end of life. The Council was initially seeking a like for like replacement, however, wanted better removal efficiency and a solution that required minimal maintenance and operator input in day-to-day use. Key requirements included the ability to retrofit the new screen into the existing concrete channel to minimise site modifications, and incorporated screenings compaction and washing.

Screw Screen

New South Wales

Inlet Screening for Pet Food Manufacturer

Food and Beverage

A pet food manufacturing facility in Western Sydney wanted to replace an ageing rotary drum screen due to poor screening performance leading to issues with a Dissolved Air Floatation process downstream. They also wanted to replace an existing screenings Screw Compactor that did not provide sufficient dewatering and used too much potable water for washing. MAK Water was engaged to provide a solution. We delivered an integrated and compact replacement to fit into the existing plant room with minimum impact to operations.

Screw Screen

New South Wales

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