Sub-manhole and chimney neutralisers
Eliminate Bothersome Odours with Passive Neutralisers
Sub-manhole and chimney neutralisers effectively eliminate odours and toxic substances
Underlid and chimney neutralisers effectively eliminate odours and substances emitted into the air in sewage facilities during the transportation, treatment, and storage of wastewater.
Advantages of use
Effective removal of sulphur compounds – the neutralisers eliminate volatile sulphur compounds, such as hydrogen sulphide and mercaptans, which are produced during the decomposition of wastewater.
Proven effectiveness – studies conducted by the Medical University of Gdańsk and the Institute of Fluid-Flow Machinery of the Polish Academy of Sciences.
Easy installation – they can be installed in both new and existing sewage infrastructure.
Maintenance-free operation – they do not require daily supervision or action from staff.
Low operating costs – the neutralisers do not require power, eliminating energy costs, and the only replacement needed is the carbon insert.
Reliability – the effectiveness of air purification is not dependent on temperature fluctuations or varying amounts of wastewater.
Corrosion resistance – made from materials resistant to corrosion and chemicals present in wastewater.
Application
Passive neutralisers can be used in:
- sewage pumping stations and pumping plants,
- domestic sewage treatment plants,
- food processing plants,
- expansion wells,
- cesspits,
- infiltration systems,
- sewer manholes.
Types of passive neutralisers
One type of neutraliser are the passive neutralisers, where air flows gravitationally as a result of pressure differences.
Two types of passive neutralisers are available:
- ENPeco sub-manhole neutralisers,
- chimney neutralisers: EZK, KF, and KFW.
| Parameter | Active neutralisers | Passive neutralisers |
|---|---|---|
| neutralising fill | impregnated activated carbon | impregnated activated carbon |
| neutralisation process | chemisorption | chemisorption |
| range of neutralisation | volatile sulphur compounds* | volatile sulphur compounds* |
| airflow | forced by fan | gravitational |
| required utilities | power supply (230 V or 400 V) | none |
ENPeco sub-manhole neutraliser
- designed for installation under manhole covers of sewer manholes
- simple installation under covers of diameters: 600 to 800 mm
- replaceable filter insert
EZK integrated supply-exhaust anti-odour chimney filter
- designed for installation in, among others, sewage pumping stations and pumping plants
- available in two diameters: 110 mm and 160 mm
- an effective odour control alternative to two traditional ventilation chimneys
- has a mounting plate that ensures proper sealing
- replaceable filter insert
KF pipe chimney
- designed for installation in place of a standard ventilation chimney, e.g., in closed tanks of treatment plants, pumping stations, and cesspits. Available in two diameters: 110 mm and 160 mm
- replaceable filter insert
KFW chimney insert
- designed for installation in existing standard ventilation chimneys
- available in two diameters: 90 mm and 140 mm
Construction and installation
The device is made of HDPE, which is highly resistant to prolonged contact with aggressive substances present in sewage installations. Ecol-Unicon sub-manhole and chimney neutralisers were developed in cooperation with leading experts in odours and toxic substances. Their effectiveness has been confirmed by the Faculty of Health Sciences of the Medical University of Gdańsk and the Institute of Fluid-Flow Machinery of the Polish Academy of Sciences.
Thanks to the applied technical solutions, easy and safe replacement of the insert is possible, reducing operating costs.
The devices are constructed from HDPE, which is highly resistant to prolonged contact with aggressive substances present in sewage systems.
The technical solutions used ensure the tightness of the construction and allow for the easy and safe replacement of activated carbon inserts (impregnated, catalytic). The correct selection of these inserts affects the efficiency of air purification and the longevity of the device.
To maintain the full efficiency of the neutraliser, remember to regularly replace the carbon insert!
Operating method
The sewage system transports wastewater to a specific area, where biochemical reactions occur, leading to the formation of chemical compounds, including odour-causing ones. These compounds mix with the air, posing a potential threat to human health and the environment.
In the neutraliser, contaminated air passes through an activated carbon bed, which traps the contaminants through chemisorption. This process, aided by an alkaline impregnate, involves the chemical bonding of contaminants to the surface of the activated carbon. Therefore, the appropriate selection of the type of activated carbon bed is crucial for the effectiveness of the neutralisers, tailored to the specifics of the location where the device operates.
Operation
Regular inspections of the devices are essential to assess their technical condition. During inspections, neutralisers should be cleaned of debris, sand, and stones, and the operation of the EUcleanON® system in underlid neutralisers should be checked by pouring water into the siphon.
The technology allows for easy replacement of the neutralising insert without the need to purchase a new chimney or housing, which reduces operating costs. The lifespan of the activated carbon bed depends on the concentration of contaminants in the air. Ecol-Unicon supplies new inserts and ensures the collection of used material.