Used as part of a larger wastewater treatment system, a distribution box is a component which helps to process the flow of effluent as it moves into a drainage field or water course.

Manufactured from polypropylene, the boxes are lightweight, strong and durable, creating a versatile unit with multiple inlet and outlet configurations to suit any site condition.

Available as a 4 hole or 7 hole box, the units can accommodate any type of pipework ranging in diameter from 110-160mm and are supplied with appropriate seals.

Stabilizing feet are moulded into the base of the boxes to anchor the units in place.

Lockable GRP enclosure are typically installed alongside commercial/industrial sewage treatment plants and pump stations to ensure electrical components, such as compressor pumps and switches, are secure and safe from the elements.

Marsh GRP kiosks are manufactured from virgin unfilled resin offering exceptional durability and impact resistance. The units are corrosion resistant and are guaranteed to be watertight and of uniform thickness. These combined properties ensure that the kiosks will stand up to the most rigorous conditions during their service life.

With extensive experience of managing the design, manufacture and despatch of pump stations, sewage treatment plants, attenuation tanks, rainwater harvesting systems and associated products, Marsh Industries’ Civils Team works closely with clients to ensure products are designed and specified to suit individual site conditions.

Designed for foul pipework, septic tanks and domestic sewage treatment plants, the Poly-Air activated carbon vent filter removes offensive odours as they exit the sewer pipe network through vent pipes.

The problem

Every building with a sink, toilet, bath or shower has a network of sewer pipes to remove wastewater. Odours from this pipe network (and septic tanks) are often a nuisance problem and when they occur can be particularly unpleasant.

All sewer pipe networks and septic tanks should have vent pipes installed to allow pressure to equalise as wastewater flows from a sink, toilet or other source. Without vent pipes, flow would be compromised.

Under normal conditions, vented air is directed to the outside of the building and dispersed. However, events can occur where the wind outside redirects odour from the vent pipe back towards an occupied area of the building.

The solution – Poly-Air carbon vent

Install a Poly-Air activated carbon vent filter to remove offensive odours, such as Hydrogen Sulphide, as they exit the vent pipes.

Marsh Industries’ Turret Guard provides safety from accidental entry into a sewage treatment plant.

It is imperative to ensure employees, members of the public or anyone living or working beside underground storage tanks are safe from accidental entry. The first step towards prevention of accidental entry is to ensure surfaces around all tanks are free from slip and trip hazards. Additionally, a turret guard can be secured to the inside of the turrets to prevent personnel, debris or local wildlife from entering the system.

Be sure, be safe, and install Marsh Industries turret guards to sewage treatment plants, pump stations, attenuation tanks, and silage tanks.

Marsh Anti-flood kits are designed to maintain the integrity of sewage treatment systems during times of flooding or in areas where there is a high risk of water seepage.

Elevated compressor housing – Anti-flood kits

Marsh Industries’ elevated compressor housing protects sewage treatment plant electrical components from water ingress due to flooding or water seepage.

Manufactured with a green gelcoat finish, the raised housing is available in 1 and 1.5m heights and is supplied with an IP rated waterproof plug and sockets. The housing is also vented to allow even distribution of air to the compressor.

Compressors provide diffused air to an aeration chamber within a package sewage treatment plant. Aerobic bacteria (biomass), supported by diffused air and mobile media, breaks down solids and increases oxygen which reduces ammonia levels in the effluent before discharge.

NB: When ordering the elevated compressor housing, please contact our technical team for accurate compressor sizing.

Impermeable lid

Marsh Industries has developed an impermeable lid for wastewater systems which prevents water ingress due to flooding or water seepage.

The green lid, with its wrap-around cover and anti-skid embossing, covers a 600x600mm opening allowing easy access to internal chambers for maintenance and desludging. It is supplied with lock down bolts and has a working load of 1.5 tonne.

Heavier duty lids are available. Please contact Marsh Industries for further details.

110mm/160mm non-return valves

These unique non-return valves protect sewage treatment plants by preventing floodwater from moving up the drainpipes from overflowing rivers, ditches or watercourses.

The valves also benefit from a stainless steel backing which prevents rodents from entering the plant during a flood event.

Larger diameter valves are available. Please contact Marsh Industries for further details.

For over a century scientists have known about the ability of ultraviolet light (UV) to disinfect and, for many years, UV-C lamps have been used for disinfection in medical settings, food production and a number of other places.

Effluent disinfection using UV light is the decontamination of outflowing water from sewage treatment plants, sewer pipes or industrial outfall into natural bodies of water.

Without UV disinfection, effluent can retain a mass of hazardous pathogens that could infect the natural water, causing potentially serious environmental health issues.

UV light deactivates pathogens so that they cannot survive in clean water, meaning they cannot replicate and infect future waterways.

UV light is one of the safest disinfectants available due to the lack of chemicals used and produced by the device.

The most common method of effluent disinfection used in off-mains sewage treatment plants is to install and connect a separate UV disinfection unit to the outlet of the sewage treatment plant.

The UV disinfection unit contains the necessary UV light system to match the volume of outflow from the sewage treatment plant.

The solution - Marsh:UV Disinfection Unit

Marsh Industries has developed an innovative UV disinfection system which removes 99% faecal coliform bacteria levels from sewage treatment plant effluent.

The Marsh:UV Disinfection Unit can be supplied as an integral part within the Marsh Ultra:Polylok range of sewage treatment plants (50-500+PE) or as a stand-alone unit which can be installed at the outlet end of any existing sewage treatment plant.

The UV light(s) are mounted in a sub-assembly which can be easily removed for periodic servicing and bulb replacement. In stand-alone units, the light assembly is mounted in a primary chamber by an anodized aluminium frame. The frame seals against the inner surface of the primary chamber to prevent flow bypass.

When the disinfection unit is filled with waste water, the ultraviolet light source operates continuously with a lamp surface temperature range of 105-120ºF providing optimum UV light output and long lamp lifetime (Power supply is via 230v Single Phase with consumption of a single UV lamp being 45 watts).

In addition to the UV disinfection assembly, microfibre tertiary filters are attached at the inlet pipe to reduce any remaining suspended solids, residual BOD and ammonia levels.

UV treatment performance

A single UV maximum flow through the unit is rated at 16m³ per day or a peak flow rate .056 litres per second under the following conditions:

• UV dosage is greater than 5mJ/cm²
• Suspended Solids – less than 30 mg/litre
• BOD (5 days) – less than 30 mg/litre
• If the effluent is cleaner than the above figures the level of treatment is greater

From the above conditions, the faecal coliform reduction by the Marsh:UV Disinfection Unit exceeds 99.9% or 3-logs, at the end of UV lamp life, which is two years of continuous operation.

The table below provides an indication of the UV dosage requirements in order to provide a 90-99% reduction in different strains of coronavirus.

Organism	90% (1 log reduction) mJ/cm2	99% (2 log reduction) mJ/cm2	Source
Coronavirus	0.7	2.1	Walker 2007
Berne virus (Coronaviridae)	0.7	2.1	Weiss 1986
Murine Coronavirus (MHV)	1.5	4.5	Hirano 1978
Canine Coronavirus (CCV)	2.9	8.7	Saknimit 1988
Murine Coronavirus (CCV)	2.9	8.7	Saknimit 1988
SARS Coronavirus CoV-P9	4.0	12.0	Duan 2003
Murine Coronavirus (MHV)	10.3	30.9	Liu 2003
SARS Coronavirus (Hanoi)	13.4	40.2	Kariwa 2004
SARS Coronavirus (Urbani)	24.1	72.3	Walker 2007
Average	6.7	20.1	

Whisspurr – Acoustic Vibration Reduction (AVR) unit

Introducing Whisspurr, the innovative AVR unit designed to reduce noise and vibration from diaphragm compressors used in the water and wastewater treatment sectors.

Fitted inline between the compressor and air diffuser, the Whisspurr significantly reduces noise and vibration generated from the pulsation of the diaphragm compressor whilst enabling a consistent, unrestricted flow to the air diffuser.

The unit is suitable for all types of compressor; Bibus Secoh, Charles Austen, Nitto, etc.

For accurate unit sizing, contact Marsh Industries’ technical team on 01933 654582 | sales@marshindustries.co.uk.

Note:
> The Whisspurr AVR unit is chemically sealed and bolted shut. This creates a pressure vacuum when in operation. Any tampering, breaking of the seal, or removal of any bolts will invalidate the warranty and will prevent the unit from working effectively.