Biorock MONOBLOCK-2 Series Operation manual

PAGE 1 / 49 Installation and User guide –MONOBLOCK Systems –06-12-2016
INSTALLATION & USER GUIDE
FOR THE
MONOBLOCK SYSTEMS:
MONOBLOCK-2
MONOBLOCK-3

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TABLE OF CONTENTS
A. INSTALLATION GUIDE .............................5
B. USER GUIDE...........................................25
C. APPENDICES ..........................................39

PAGE 3 / 49 Installation and User guide –MONOBLOCK Systems –06-12-2016
Dear Customer,
Congratulations on your purchase of this BIOROCK Domestic Sewage Treatment Plant. Your new
MONOBLOCK will guarantee years of trouble-free operation, peace of mind and protection for the
environment.
We highly recommend that you familiarize yourself with this guide for the installation,
commissioning and maintenance of your new MONOBLOCK system.
The instructions for the maintenance and visual checks of the system will ensure that you have a
reliable and long-lasting sewage treatment plant.
Please do not hesitate to contact your BIOROCK distributor for any queries or further assistance.
Thank you for choosing BIOROCK.
The installation and commissioning of your MONOBLOCK system should be carried out by a
competent drainage engineer.
Please follow the maintenance procedures in this manual to ensure best performance of your
system.
BIOROCK Sewage Treatment Ltd.
5300 Lakeside, Cheadle Royal Business Park,
SK8 3GP Cheadle, Cheshire
E-mail: [email protected]
Telephone: [phone]
READ CAREFULLY

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A. INSTALLATION GUIDE
MONOBLOCK SYSTEMS:
MONOBLOCK-2
MONOBLOCK-3

A. INSTALLATION GUIDE –TABLE OF CONTENTS
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TABLE OF CONTENT
1. THE MONOBLOCK SEWAGE TREATMENT PLANT.................................................................7
1.1. General points .............................................................................................................................. 7
1.2. Sizing …...………………………………………………………………………………………………………….….……............... 7
1.3. Precautions ................................................................................................................................... 8
1.4. Identification ................................................................................................................................. 9
1.5. Handling and transport ................................................................................................................. 9
2. OPERATING PRINCIPLES OF YOUR MONOBLOCK SYSTEM ...................................................9
2.1. Primary Compartment –Operating principle.............................................................................. 10
2.2. Secondary Compartment –Operating principle..........................................................................10
2.3. MONOBLOCK system: Technical.................................................................................................. 11
3. INSTALLATION LAYOUTS ..................................................................................................12
3.1 Installation layout n°1: Gravity discharge (non-electric)............................................................12
3.2 Installation layout n°2: Pumped discharge................................................................................. 12
4. INSTALLATION OF THE SYSTEM ........................................................................................13
4.1 Installation principles ..................................................................................................................13
4.1.1 Before the installation of the complete system............................................................13
4.2 Installation in dry ground conditions........................................................................................... 14
4.2.1 Installation and digging in dry ground conditions........................................................14
4.2.2 Installation of the tank in dry ground conditions ........................................................ 14
4.2.3 Backfilling in dry ground conditions ............................................................................. 15
4.3 Installation in wet ground conditions.......................................................................................... 15
4.4 Installation in specific sites.......................................................................................................... 16
4.4.1 Installation in difficult areas and sites ......................................................................... 16
4.4.2 Installation in difficult ground conditions .................................................................... 16
4.4.3 Backfilling in difficult sites............................................................................................16
4.5 Installations under roads, courtyards or storage areas............................................................... 17
4.6 Other specific cases .....................................................................................................................17
4.6.1 Incline too steep ........................................................................................................... 17
5. VENTILATION AND WATER DISTRIBUTION........................................................................18
5.1 Ventilation of the Primary Compartment (“Primary tank”) ........................................................18
5.2 Ventilation of the Secondary Compartment (“Bioreactor”)........................................................19
5.3 Water distribution ....................................................................................................................... 19
5.4 BIOROCK media….........................................................................................................................21
5.5 Securing the lids...........................................................................................................................21
6. STOPPING AND RESTARTING THE SYSTEM........................................................................23
7. CONFORMITY AND WORK COMPLETION ..........................................................................23
8. RECOMMENDATIONS OF USE AND MAINTENANCE ..........................................................23
9. COMPLIANCE WITH REGULATIONS AND STANDARDS .......................................................23
10. WARRANTY ...................................................................................................................24

A.INSTALLATION GUIDE 1. THE MONOBLOCK TREATMENT PLANT
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1. THE MONOBLOCK SEWAGE TREATMENT PLANT
1.1 GENERAL POINTS
The MONOBLOCK SYSTEMS from BIOROCK are compact non-electric Sewage Treatment Plants. The
treatment relies on the revolutionary BIOROCK biological purification process. The MONOBLOCK
sewage treatment unit is exclusively designed for domestic waste water purification.
The MONOBLOCK plant consists of 2 compartments in a single tank. The primary treatment
(anaerobic) takes place in the first compartment which is equipped with a BIOROCK effluent filter.
The secondary treatment (aerobic) takes part in the second compartment.
Ventilation of both compartments is combined, assuring a continuous natural air draft through the
system for proper, efficient venting. The MONOBLOCK system is equipped with:
- One air inlet pipe downstream the system at the treatment compartment
- One air outlet pipe upstream the system at the primary compartment
A small pump can be installed in a pump shaft downstream of the system to lift the treated water
and discharge to a higher level if needed.
BIOROCK recommends the installation of an effluent sampling at the outlet of the treatment
compartment.
1.2 SIZING
The MONOBLOCK-2 units (2000 liters primary compartment) have a capacity of 4, 5,and 6 P.E.
(Person Equivalent).
The MONOBLOCK-3 units (3000 liters primary compartment) have a capacity of 5, and 6 P.E. (Person
Equivalent).
The capacities of the MONOBLOCK units are based on the results achieved during the EN-12566-3
Performance test.
UNITS PARAMETERS
MONOBLOCK-
2-700
MONOBLOCK-
2-800
MONOBLOCK-
2-900
MAX.PEOPLE EQUIVALENT
4 P.E.
5 P.E.
6 P.E.
VOLUME PRIMARY COMPARTMENT
2000 L
2000 L
2000 L
WASTE WATER TREATED
150 L/day/ PE
150 L/day/ PE
150 L/day/ PE
TREATED ORGANIC LOAD (BOD5)
0,24 Kg/day
0,30 Kg/day
0,36 Kg/day
UNITS PARAMETERS
MONOBLOCK-
3-900
MONOBLOCK-
3-1000
MAX.PEOPLE EQUIVALENT
6P.E. 8P.E.
VOLUME PRIMARY COMPARTMENT
3000 L
3000 L
WASTE WATER TREATED
150 L/day/ PE
150 L/day/ PE
TREATED ORGANIC LOAD (BOD5)
0,36Kg/day 0,48Kg/day

A. INSTALLATION GUIDE 1. THE MONOBLOCK TREATMENT PLANT
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1.3 PRECAUTIONS
Important precautions for the proper use of the MONOBLOCK system:
Please note that BIOROCK shall not be responsible for any installation design parameters and
groundworks at any case. We recommend to involve a civil engineer or a specialized design office
in the design of the system installation if necessary and to follow best practices of the industry.
Only domestic sewage should enter the system; no rainwater is allowed.
To ensure the good working order of the MONOBLOCK system, the use of automatic toilet cleaners,
electric waste-disposal systems and pumps equipped with blades are not to be used. If there is a
professional kitchen on site, an efficient and properly sized grease trap should be installed. The
grease trap should be installed before the primary tank.
The MONOBLOCK is equipped with an effective effluent filter at the outlet of the Primary
compartment before the water goes on to the secondary compartment. However, do not dispose of
the following items to the MONOBLOCK system as it may affect the treatment process:
Kitchen or motor oils, fats, wax, resin, paint, solvents, hydrocarbon-based products (petrol, crude oil
etc.), any pesticide or antibacterial product, items of a toxic nature, boiler or air-conditioning
condensate, swimming pool backwash, rainwater, drainage water or ground-water.
We recommend that pipework after the MONOBLOCK unit should allow sampling.
Special care should be taken with the aeration of the system. The aeration should be checked by the
installer using a smoke test once pipework and ventilation ducts have been connected and before
backfilling the system. The smoke test should be performed under normal representative conditions.
Each system should be vented independently and equipped with its own ventilator (wind driven or
electrical). The number of elbows used in the pipework should be limited as much as possible. 90o
elbows should not be used but 45oelbows instead. The high air outlets should be installed as close
as possible to the low air inlets.
Achieving efficient ventilation is the responsibility of the installer as he is familiar to the
implementation site and local conditions that may interfere in the system’s venting.

A. INSTALLATION GUIDE 1. THE MONOBLOCK TREATMENT PLANT
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1.4 IDENTIFICATION
Before installing please copy the serial number of each tank on to the documents to be kept by the
customer (Appendix 5 of this Guide.)
1.5 HANDLING AND TRANSPORT OF THE TANKS
Lifting eyes are situated on the top of each tank, enabling lifting by crane or JCB. The tanks should be
handled, transported and stored with care after delivery to avoid being damaged.
When looking at the tank facing the CE logo , marked as on the drawing below, the serial number is:
MOn an identification tag inside the
tank, and /or;
Marked as on the drawing below
MEngraved on the area to your right at
the air outlet ;
Marked as on the drawing below
MDetail of the identification plate inside the tank:

A. INSTALLATION GUIDE 2. OPERATING PRINCIPLE OF THE MONOBLOCK STP
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2. Operating principle of a MONOBLOCK Treatment Plant
The MONOBLOCK system is composed of 2 compartments. Initially the raw sewage enters the first
compartment to provide separation and the breakdown of organic solids (Primary Treatment). The
sewage then passes through an effluent filter before discharging into the secondary compartment
which incorporates the well proven aerobic digestion process (Secondary Treatment) and filtration
process (Tertiary Treatment).
2.1 PRIMARY COMPARTMENT: OPERATING PRINCIPLE
The effluent (domestic wastewater composed of black water: origin toilets –and grey water: origin
kitchen, bathroom, laundry) enter the primary compartment of the MONOBLOCK system. This
primary compartment carries out the first basic phase of wastewater treatment, that is separation of
solids and fats by flotation (formation of a grease layer) and by clarification (the suspended solids
sink to the bottom of the tank by natural settlement). Separated solids building up at the bottom of
the primary compartment are called “primary sludge”. This sludge breaks down in time by anaerobic
digestion.
The primary compartment is equipped with an efficient effluent filter. This filter holds back
remaining suspended solids, fats and other floating matter which enables a higher quality of pre-
treatment.
2.2 SECONDARY COMPARTMENT: OPERATING PRINCIPLE
The well-proven BIOROCK biological purification process takes place in the second compartment of
the MONOBLOCK system. The BIOROCK media is used as a carrier material allowing colonization of
the necessary bacteria, a process which is essential for the effective treatment of domestic
wastewater.
The MONOBLOCK system consists of three biological filtration stages and one aeration stage. (See
Appendice 1.5 : Détail of BIOROCK media layer)
MThe pre-treated water is spread over the surface of the first layer of BIOROCK media by an effluent
distribution system and penetrates into the media for purification.
MThe effluent flows via gravity through a ventilated area, mixing oxygen with the effluent prior to
the secondary filter stage. Efficient ventilation throughout the treatment plant is essential for
maximized performance.
MA second section of the compartment contains a second media bed providing further
treatment
MFinally, the lower section of the tank contains a third media bed providing final treatment.
See Ch. B/3.2 for weight details of each BIOROCK media layer
The treated water discharging from the unit must flow by gravity to the next stage or a discharge point.
We advise to avoid stagnant treated effluent at the discharge point. Make sure the discharge pipe is
equipped to avoid small animals entering the system.
Each MONOBLOCK system should be vented independently and equipped with its own ventilator (wind
driven or electrical if necessary). (See appendix 2.4: Ventilation scheme).

A. INSTALLATION GUIDE > 3. INSTALLATION LAYOUTS
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2.3 MONOBLOCK SYSTEM –TECHNICAL
The tanks and covers are made of polyethylene
Each system has lifting eyes are situated on the top of the tank
The water inlet has a ø of 110 mm
Air inlet and air outlet have a ø of 110 mm
Each unit has a serial number that is located on the right side of the tank (A/Chapter 1.3)
All materials in the BIOROCK plants are resistant to corrosion and guarantee a long-term
lifespan
The tanks are made by rotational molding in HDPE (High Density Polyethylene)
The tanks are UV resistant and have a lifespan of at least 25 years
The HDPE tanks are 100% recyclable
The screws are made of stainless steel
The pipes are made of PVC and Polypropylene
The entire system is nearly 100% recyclable

A. INSTALLATION GUIDE > 3. INSTALLATION LAYOUTS
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3. Installation layouts
The installation of the MONOBLOCK depends on the available site, gradient, type of ground, the level
of the water inlet and the discharge options.
When the outlet for final effluent is not accessible, a sampling shaft should be installed. When using
a final effluent pump the pump shaft can be used as a sampling shaft.
3.1 INSTALLATION LAYOUT N°1
GRAVITY DISCHARGE (non-electric)
3.2 INSTALLATION LAYOUT N°2
PUMPED DISCHARGE
MONOBLOCK SYSTEM DISCHARGE
MONOBLOCK SYSTEM PUMPING DEVICE DISCHARGE

A. INSTALLATION GUIDE 4. INSTALLATION OF THE SYSTEM
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4. INSTALLATION OF THE SYSTEM
This chapter provides a guide to the installation and commissioning of the MONOBLOCK system. This
manual cannot be a substitute for documentation and instructions from manufacturers of non-
BIOROCK products integrated into the system by the user.
Please take photographs of each stage of the installation with particular
attention to all of the connecting pipework
DO NOT completely fill the tank with water before unit is backfilled
DO NOT use dirty or contaminated water
DO NOT use a mechanical compactor, only compact manually
DO NOT reuse the excavated soil or spoil from the site
DO NOT install the system too close to the house or other buildings
DO NOT install the system too close to large trees
4.1 INSTALLATION PRINCIPLE
Dimensions and footprint of the MONOBLOCK system:
WIDTH
(backfilling
included)
LENGTH
(backfilling
included)
Minimum footprint
MONOBLOCK-2
1,80 m
3,40 m
6,12 m²
MONOBLOCK-3
1,80 m
4,40 m
7,92 m²
See all technical features of the MONOBLOCK systems at part C of the User Guide.

A. INSTALLATION GUIDE 4. INSTALLATION OF THE SYSTEM
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4.1.1 Before the installation of the complete system
Always keep the system accessible
Check the tank and associated equipment (options, connections, seals, etc.) Before installation,
see technical details for each system;
A minimum distance of about 3 m1from the house and 3 m1from trees which have extensive
roots should be ensured;
A minimum distance of 2.5 m1from any building should be ensured, otherwise the stability of
the building should be checked;
The installation should be located away from any traffic areas and parking (at least 2 m1);
The installation of the MONOBLOCK system is possible in high ground water conditions if special
precautions are taken
Consult a professional engineer if the units are to be installed with extension sets (“deep”
installations)
System lids should not be buried and should always remain accessible for maintenance
The minimum distance between the primary tank and the treatment unit is 300 mm
The distance between the side of the excavation and the tanks must be minimum of 300 mm
Connections for the MONOBLOCK system are made with flexible seals with a diameter of 110 mm
The effluent inlet pipe to the first compartment should have a minimum gradient of 2 % and a
maximum of 4%
Local rules and legislation should be respected
4.2 INSTALLATION IN DRY GROUND CONDITIONS
See appendix 1.1 «Installation in dry ground conditions»
Conditions for installation:
- Dry and stable ground conditions
- Absence of water at the bottom of the excavation
4.2.1 Installation and digging in dry ground conditions
The maximum level of top soil above the backfill is 200 mm
The units must stand on a clean and stable base such as concrete
In dry ground conditions pea gravel can be used as backfill
Mud and other soft materials must be removed from the bottom of the excavation prior to
installation
A stable base must be created at the bottom of the excavation
The base of the excavation should be level and compacted
There must be a distance of at least 300 mm between the walls of the excavation and the units
4.2.2 Installation of the system in dry ground conditions
Once the base of the excavation is stable, the installation can begin.
The MONOBLOCK system should be positioned horizontally.
Before connecting any water or ventilation pipes, ensure that the units are perfectly
Installed and stable on the base.
Ensure that all levels are correct so that the wastewater can flow freely through the system
Check that all connections are correctly positioned
Ensure that the seals are watertight

A. INSTALLATION GUIDE 4. INSTALLATION OF THE SYSTEM
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4.2.3 Backfilling in dry ground conditions
Backfill the hole with 3 to 6 mm smooth pea gravel, or lean-mix concrete whilst filling the
tanks with water at the same level
Do not exceed 300 mm per water filling and compaction cycle
Backfilling around and filling both the Primary Tank and BIOROCK unit with water should
take place at the same time.
Make sure that the BIOROCK media is completely saturated with water
Do not backfill with the soil removed during the excavation: roots and stones can damage
the tank.
Do not compact the backfill material mechanically: compact manually.
Once the backfilling is finished and compacted, check the levels of the tanks again
The lids or access covers of the system should be installed just above ground, level to
provide easy access for maintenance.
Close and secure all covers with screws
Complete the backfilling once all pipework has been checked and connected.
4.3 INSTALLATION IN HIGH GROUND WATER CONDITIONS
Appendix 1.2«Installation in high ground water conditions»
Conditions for installation:
LWet ground
LPresence of high ground water table etc.
The MONOBLOCK units can be installed in high ground water conditions with special
precautions.
The level of the water table must never exceed the level of liquid inside the Primary
Compartment. Extremely high water tables signify a flood risk which could cause
water ingress or collapsed tanks.
Perform the same work as in dry ground conditions with the additional recommendations and
modifications below:
For installations in a high water table area, ensure the adequate drainage of the excavation during
installation
Anchor the unit to the concrete slab (slab thickness should be a minimum 200 mm)
The base must extend to a minimum distance of 300 mm beyond the base of the tanks on all sides
If you are unsure, a qualified civil engineer should be consulted
Anchoring the tanks to the base is achieved with a system using the anchoring points; these
are positioned at the bottom of the tank.
Lateral backfilling is 300 mm thick around the system and consists of sand/cement lean mix
concrete (dosing: 200 kg cement / m³.)
For installations in a high water table area, ensure the adequate drainage of the
excavation during installation and anchor the unit to the concrete slab

A. INSTALLATION GUIDE 4. INSTALLATION OF THE SYSTEM
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4.4 INSTALLATION IN «DIFFICULT» AREAS AND SITES
Conditions of installation:
Difficult ground conditions can be unstable ground, clay, rocks, etc.
If necessary, ensure the adequate drainage of the excavation during installation and anchor the
unit to the concrete slab.
Solutions such as sheet piling should be used to secure the sides of the excavation.
A retaining wall may be necessary to ensure that the backfill does not move in a difficult
installation.
4.4.1 Installation in difficult areas and sites
Do not use heavy clay soil for the top soil level. If the top soil to be used is predominantly clay then
It should be mixed with sand.
In all difficult grounds conditions the base of the excavation should be constructed from concrete
with a minimum depth of 300 mm.
Roots and stones can result in damaging the tank wall and should be removed.
The depth to the bottom of the excavation and the concrete base for the Primary Tank must allow
an incline of 2% minimum for the wastewater inlet pipe from the property to the Primary
Compartment of the system.
4.4.2 Installation in difficult ground conditions
Once the base of the excavation is stable and level the installation can begin.
Before connecting any pipe work or ventilation pipes ensure the system is perfectly installed and
stable on the excavation base. Ensuring that all levels are correct is crucial if the wastewater is to
flow efficiently through the system.
Pay special attention to the rubber seals. The seals ensure that the system is watertight.
4.4.3 Backfilling in difficult ground conditions
In all difficult ground conditions backfilling should be carried out to a level of 20 cm below the tank
covers. Concrete should be used, compacted and applied in layers of 300 mm.
A retaining wall may be necessary to ensure that the backfill does not move in a difficult
installation. The thickness and structure of any retaining wall should be specified by a qualified
engineer along with the method of construction and backfilling procedure.
At the same time as backfilling around the MONOBLOCK system both tanks should be gradually
filled with clear water (increments of 300 mm)
Once the backfilling is finished and compacted, check the levels of the tanks again
The various lids or access covers for the system are installed just above ground level to provide easy
access for maintenance.
Position the hatches and secure them with the screws positioned on the sides.
Backfilling to the surface is completed once all pipe work has been connected. With a maximum
depth of 20 cm the backfill should consist of top soil without any stones or sharp objects. When
building up the final level of backfill around the covers keep in mind any future settlement of the
soil.

A. INSTALLATION GUIDE 4. INSTALLATION OF THE SYSTEM
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4.5 INSTALLATION UNDER ROADS, COURTYARDS OR STORAGE AREAS
Installation conditions:
LRoads, courtyards or storage areas: The installation will be carried out in accordance with the
preceding paragraphs, taking into account the nature of the soil.
For an installation under roads, courtyards or storage areas, a distribution slab of
reinforced concrete should be constructed and placed above the tank
The concrete slab must be constructed in such a way that it does not rest on the tank
The edges of the slab must rest on the surrounding ground; the ground must be stable. If unstable
ground, specific foundations should be built
These foundations, the thickness of the slab distribution, the access to the lids of the tanks, the
unit and sampling pipe, the reinforcement and the structure of the slab, etc., will be specified by a
qualified civil engineer, based on expected traffic loads and the nature of the soil .
The high air outlet pipes should preferably be installed outside the concrete slab area. Ventilation
should be checked before leaving the site in any case (smoke test).
4.6 OTHER SPECIFIC CASES
4.6.1 Incline too steep (>5%)
A retaining wall may be necessary to ensure that the backfill does not move if the incline is too steep.
The thickness and structure of any retaining wall should be specified by a qualified engineer along with
the method of construction and backfilling procedure.
Generally, the backfill material must be compacted pea gravel or lean mix concrete applied in layers of
30 cm. (depending on ground conditions)
A detailed assessment must be carried out for all installations in difficult ground
conditions. If you are not sure about the installation, always consult a local engineer

A. INSTALLATION GUIDE > 5. VENTILATION AND WATER DISTRIBUTION
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5. VENTILATION & WATER DISTRIBUTION
Never smoke in the vicinity of the installation or sewage works in general.
Never enter the tanks without taking the necessary safety precautions such
as ventilation, air monitoring, air supply and other procedures as required.
Always have someone else on site if entering confined spaces.
Achieving efficient ventilation is always the responsibility of the installer as
he is familiar to the implementation site and local conditions that may
interfere in the system’s venting.
Make sure that the ventilation works properly. Always check the efficiency of
the ventilation through the system with a smoke test prior to backfilling.
If the site is not suitable for non-electric ventilation, electric ventilation should be
installed.
Use as few bends as possible
NEVER USE 90obends
Only use 45obends
The MONOBLOCK system is continuously vented.
5.1 VENTILATION OF THE PRIMARY COMPARTMENT
The primary compartment of the MONOBLOCK system generates malodorous gases that must be
removed by effective ventilation through the air outlet pipe.
The air outlet is located upstream to the primary compartment, next to the water inlet. The air outlet
pipe is of a diameter of 110 mm (minimum 100 mm) and is positioned vertically. It should always be
equipped with a wind driven or electrical ventilator positioned at a minimum of 40 cm above the roof
or from any other obstacle. This pipe should be away of a minimum of 1 meter from any other
ventilation.

A. INSTALLATION GUIDE > 5. VENTILATION AND WATER DISTRIBUTION
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5.2 VENTILATION OF THE SECONDARY COMPARTMENT
The air intake is located at the front of the treatment unit.
The ventilation cap at the air intake is between 150 mm and 1000 mm high from the ground.
(See Appendix 1.4: MONOBLOCK ventilation scheme)
Air flows through internal ventilation piping from the air intake to the air outlet.
The air intake pipe is of a diameter of 110 mm (minimum 100 mm)
LIn case of electric ventilation: The electric fan is installed according to the local legislation and if
possible protected against frost and severe weather.
Always check the ventilation with a smoke test in representative
conditions (calm weather and storms are not representative conditions).
Electrical ventilation may be necessary if the site is not suitable for natural,
non-electric ventilation.
If the ventilation is not working properly:
Check the ventilation system again by following the diagram
Check if the pipe work is obstructed or disconnected at any stage
Check if the air outlet pipe is positioned high enough
Check that the wind driven ventilator has enough capacity, otherwise change to an electric
ventilator.
5.3 WATER DISTRIBUTION
Make sure the BIOROCK Media is saturated with clean water
DO NOT completely fill the tanks with water before unit is backfilled
DO NOT use dirty or contaminated water
Visually check the water flowing from the primary compartment through the effluent filter then
to the second compartment.
Make sure that the BIOROCK media is completely saturated with water.
Water should be at the same level in both compartments.
Check the water distribution system at the second compartment and pay special attention to water
distribution on the BIOROCK media:

A. INSTALLATION GUIDE > 5. VENTILATION AND WATER DISTRIBUTION
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a. Water is discharged alternately on both side of the water distribution system.
b. Water is evenly distributed across the BIOROCK media
c. Flush the toilets several times and / or open taps in the house
d. Check that the water flows from the primary compartment to the second compartment
then discharges at the bottom of the system, all by gravity
e. There should not be any accumulation of water within the second compartment and water should
not accumulate on top of the BIOROCK media.
5.4 BIOROCK MEDIA
BIOROCK Media is an ideal carrier material for bacteria. The BIOROCK Media is clearly visible in the
second compartment. Under the water distribution system, the BIOROCK Media will have a grey
colour.
The BIOROCK Media is highly resistant to degradation and remains extremely stable over the long
term. It is an inorganic material which does not break down over time. It requires little maintenance:
Scraping and scarification is not necessary. Its structure and composition ensures unsurpassed and
unique surface treatment with exceptional purification results.
In normal use the BIOROCK Media should not be removed or replaced. The top layer of the BIOROCK
Media may have to be rinsed after a period of time if contaminated with solids.
The BIOROCK Media is an ecological, recyclable material.
Used BIOROCK media can be returned to your distributor or to BIOROCK for recycling.
For your safety always contact BIOROCK or your BIOROCK distributor for maintenance
of the BIOROCK media.