MULTIWASH HOOK - Separating sewer grit from organic matter

Disposing of the materials that arise during sewer system maintenance is often a major challenge. GÜNTHER supplies stationary and mobile processing technology to enable the processing of these substances (e.g. street refuse, caisson debris, faecal sludge and sewer grit) in as efficient and recyclable a manner as possible.

The SPLITTER spiral screen enables the screening of both dry and wet materials. This means that contaminants such as stones and sanitary products can be removed before the material is washed, separated from organic matter and prepared for the efficient recycling process.


Multiwash Hook


What can be processed?

  • Street refuse
  • Faecal sludge
  • Sewer grit (caisson debris, contents from the suction truck)


The goal:
To separate grit from organic matter (up to a max. of 3-5%) so that the grit can be recycled cost-effectively.

    Mobile grit treatment



    Stationary grit treatment

    SPLITTER Container Unit


    How the MULTIWASH HOOK works

    The material - liquid or dry - is fed into the feed hopper (1). From there, the material is dosed to the SPLITTER screening deck via a spiral at the bottom of the hopper (2). The conveying capacity from the hopper to the screening deck is often dependent on the nature of the material and can be adjusted using a frequency converter. In the screening deck, the SPLITTER Twin Wave, the impurities are screened off (3). The screen cut is 15 mm. This ensures that any contaminants with the potential disrupt the further process are removed. The SPLITTER Twin Wave is designed in such a way that the material remains on the screening deck for longer (more activity in the material), which has a positive influence on the screening process. For example, grit that is wrapped in a film has time to be loosened and is not swept away with the oversize particles. The angle of the screening deck can be adjusted to influence the time the material stays on the deck. In addition, the oversize grain is pre-washed; this can be carried out optionally through the installation of nozzle strips.

    The oversize particles - e.g. stones, leaves, paper, glass, sanitary products - are discharged directly (4). The undersize particles (organic matter, grit and water) are collected in the collection hopper under the SPLITTER and transported to the grit washers in a dosed manner using a spiral grit conveyor with a central shaft (5). The filling level of the hopper is monitored by means of an ultrasonic probe. The hopper has an integrated overflow function that allows the run-off of excess water. The grit is washed in the grit washer and freed from organic matter (6). The washed grit is discharged on two sides (7).

    Technical Data for MULTIWASH HOOK

    Performance data:

    • approx. 6 t/h depending on the material
    • for 2 grit washers 2 l/s at 2 bar (washing-water consumption per unit: 1 l/s)
    • installed capacity 18 kW
    • adjustable speed via frequency converter (for material dosing and for the SPLITTER)
    • manually adjustable angle for material discharge from the SPLITTER


    • Weight: 8 t
    • Length: 7.4 m
    • Width: 2.55 m
    • Height: 2.6 m


    Advantages of the mobile variant

    For stationary systems, a building permit is required. The machine must be installed at a fixed location in the hall. The machine incurs additional acquisition costs and requires additional work. The mobile variant does not require a building permit and can be moved and transported as required. It is equipped with a hook lift frame. For transport, the pipes for the material discharge are turned and the machine is sealed with a tarpaulin. The design is compact enough to allow easy transportation by lorry.


    The grit washer is mounted in a rotating fashion to allow it to be swivelled into the frame for transport.

    Thanks to this clever design, it can also be deployed directly for sewer cleaning. The pumped sewage sludge can be passed directly through the system and does not need to be transported away on vehicles for washing or disposal.This not only saves CO2, but promotes the recycling process and has a positive influence on the disposal process and accompanying costs. Since the organic matter, which also binds water, is eliminated as part of the process, the material for disposal is made lighter and smaller in volume.

    Advantages of the MULTIWASH HOOK system

    • Unique, self-cleaning screening system
    • External dimensions of the machine = internal container dimensions = low transport costs
    • Easy assembly and handling
    • Highly stable design
    • Completely pre-assembled and ready for use
    • Easy adaptation to existing systems
    • Various options available depending on the project
    • Two in one: Can be used as a receiving station for grit and faecal matter


    Andreas Nitzsche

    Phone: +49 66 41/96 54-444

    Mobile: +49 (0) 160 / 884 444 6

    Email: a.nitzsche(at)