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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.

Parameter			Units	SS-mK-110	SS-mK-160	SS-mK-260	SS-mK-390	SS-mK-610	SS-mK-830	SS-mK-1000
Treatmentcapacity*1	With rounded holes(mm)	Ø3	m3/h	90	122	130	320	504	669	816
		Ø4		93	137	218	360	528	756	920
		Ø5		108	156	237	385	606	804	981
		Ø6		131	189	288	466	734	973	1,187
		Ø8		139	199	304	492	774	1,027	1,253
		Ø10		143	206	313	508	799	1,059	1,293
	With wedge wire(mm)	0.25		33	47	72	116	184	243	297
		0.5		64	92	140	228	359	475	581
		1		112	160	245	396	623	827	1,009
		2		155	222	339	549	864	1,145	1,398
		3		173	248	378	612	963	1,277	1,558
Dimensions	W		mm	535	615	690	820	970	1,051	1,150
	H	35˚		410	420	430	550	660	800	860
	H	45˚		515	535	540	705	838	985	1,050
	A*2			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				1,000
	S			1,500
Installed motor power, 3ph, 50hz			kW	0.75						1.1
Screw gear reducer speed			rpm	11				8
Washwaterscreen basket / compaction zone (at 3 bar)			L/min	23 / 31				62 / 44		78 / 56
Empty weight (standard length)			kg	300	318	325	350	608	642	1,100

*1Theoretical, calculated using clean water, *2Transport 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 5mm (standard) or 3, 4, 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) model changes from -mk to -ok		✓	-
	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 guards and anti-wear materials on screw. All bolts in A4 (SS316)		SS304L	✓	-
		SS316L	-	✓
Screw	High-carbon steel painted		✓	-
	SS304L		-	✓
	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 treatments1			✓	-

*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 channelinstallation	Conductive probe	-	✓
Level sensor, supplied loose for channelinstallation	Ultrasonic	-	✓
Solenoid valve kit(s) for selected washing system(s) 24VDC		-	✓
Mechanical over-torque protection (backlash free-ball model)		-	✓
Control panel to AS/NZS3000, 316SS enclosure, IP56 for external installation, supplied loose, field wiring between control panel and equipment by others		-	✓

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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