Treatment of Grit from Sewers and Road Sweepings

Process Technology

Sustainable processing and recycling of mineral waste

Mineral-rich wastes such as street sweepings, sludge from sewer flushing and cleaning of stormwater tanks and gullies, and grit trap material contain not only grit and gravel but also trash (e.g. packaging material), coarse materials (e.g. stones, wood, glass, metal parts) and organic materials (e.g. soil, leaves, grass, fruit stones and cereal grains).

For the processing and treatment of such mineral wastes HUBER offers individually designed grit treatment processes.

Sustainable processing and recycling of mineral waste from from sewers and road sweepings

Wheel loader fills the feed hopper with raw material.

The material is conveyed to the sand processing plant from the underground feed bunker.

HUBER Washing Drum for coarse material removal in a grit treatment plant

The HUBER Wash Drum RoSF9 (right in picture) for coarse material separation and the HUBER Screen ROTAMAT Ro2 (left in picture) for wash water treatment.

The HUBER Grit Washer RoSF4 as the heart of grit preparation reduces the organic content in grit to < 3%.

Coarse material > 10 mm screened and washed out by the HUBER washing drum RoSF9.

Screened and compacted organic solids (> 1 mm) with DR > 30 % by the HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 .

Complete HUBER Treatment Plant RoSF5.

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Process

Process technology according to requirements

Depending on the required processing capacity, the composition of the input material to be treated as well as the requirements on the output material and other general conditions, different process engineering concepts are necessary.

The main process stages of grit treatment are:

HUBER Grit Acceptance System RoSF7

Receiving and intermediate storage tank for the material delivered and to be processed (e.g. sewer grit, road sweepings).

HUBER Wash Drum RoSF9

The wash drum is used to separate all coarse material and foreign matter that would make further treatment difficult.

HUBER Coanda Grit Washer RoSF4

The grit washer separates organic matter from the mineral fraction and produces clean grit with an organic content < 3%.

Wash water treatment

If the wash water required for grit processing is not provided externally, the grit processing plant can also be supplemented with a wash water treatment system. The required water is then purified and can be reused (water cycle).

On the basis of its wealth of experience in developing complete grit treatment systems, HUBER is able to provide a tailored concept for each individual grit treatment project.

img-application-sewer-grit-sketch-01 — Systems concept: HUBER solutions for mineral waste utilization

Products

HUBER Products for Processing and Recycling of Mineral Waste

Case Studies

HUBER Solutions in Operation

Ideal synergies of ecology and economy: smart HUBER solutions for grit processing in the waste management industry

HUBER Grit Treatment System RoSF5 in the waste management industry

Professional treatment of sewer grit

More and more sewage treatment plant operators rely on HUBER systems when it comes to the treatment of external materials

First complete treatment plant for sewer grit installed in China

HUBER horizontal grit dosing screw with coarse material separator

Ideal synergies of ecology and economy: smart HUBER solutions for grit processing in the waste management industry

Due to the growing world population and the ongoing construction boom, the resources sand and water are becoming increasingly scarce. Smart solutions from HUBER are designed to remedy this by exploiting synergies of ecology and economy, thus promoting sustainable grit processing in the disposal industry.

Installation drawing - project planning of grit treatment process at company Hammerer

HUBER Grit Treatment System RoSF5 in the waste management industry

The aim of the waste management industry is the processing of sands and mineral waste into recyclable fractions.

Coarse material with a high amount of construction waste from the sewer system in Shanghai

Professional treatment of sewer grit

Megacities and their problem with construction waste, example: Shanghai

Grit treatment system RoSF5HW with automatic covering of the acceptance tank on STP Frankfurt Niederrad

More and more sewage treatment plant operators rely on HUBER systems when it comes to the treatment of external materials

For almost 20 years already, HUBER SE has provided successful solutions for the treatment of road sweepings, sewer grit and grit from sewage treatment plants.

First complete treatment plant for sewer grit installed in China

Due to the well known separation size of individual components this grit treatment solution provides cost-effective separation of sewer grit into different fractions.

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