Condo Media - April 2018 - 44

WHAT YOU

flush M A T T E R S

The Parts that Break
P I E C E S

wastewater for the bacteria to process the nutrients
and remove the suspended solids. Typically, the piece
of equipment required to perform this task is a blower
that provides large volumes of air under some pressure.
Alternatively, there are systems that use pumps to push
wastewater up and over media, allowing the wastewater to pick up oxygen as it trickles down through the
media to the treatment area. These systems are known
as trickle filters.
Tertiary treatment consists of the removal of nutrients such as Ammonia (NH3), Nitrite (NO2), and
Nitrate (NO3); and in addition, the treated wastewater
may be disinfected. This process of nutrient removal
is partially completed within the secondary process
in which the NH3 is converted by aerobic bacteria to
NO2, and finally to NO3. Following the conversion of
NH3, the NO3 is then broken down to free nitrogen
by anaerobic bacteria that, while consuming a carbon
source (methanol, sugar, acetate, etc.), will strip the
oxygen off the NO3 for respiration.  

What you flush down the toilet can have
catastrophic effects on your wastewater
treatment system from start to finish.
Quaternary Ammonium Compounds is a component in many household cleaners that will kill the
bacteria that perform these treatment processes.
Disinfection of the wastewater can be completed by
exposure to ultraviolet (UV) light, ozone, or chlorine.
THE LAST STEP
Discharge of the treated wastewater to the ground is
completed through the SAS. Groundwater is contacted
by the treated wastewater only after it has passed
through at least four feet of soil. SASs may fail from
bacterial growth and/or fine solids buildup in the pore
spaces of the soil. Systems that have secondary and
tertiary treatment should have a significantly longer
lifespan than those that do not.  
What you flush down the toilet can have catastrophic effects on your wastewater treatment system
from start to finish.
n SCOTT E. KRAIHANZEL IS CURRENTLY
A PROJECT MANAGER WITH WESTON
AND SAMPSON SERVICES, INC.

44

CONDOMEDIA

T O

P L A N

F O R

Here's a closer look at the important pieces that
make your wastewater system work:
COLLECTION SYSTEM
This portion of your system conveys every item that
leaves every toilet, sink, and shower in your community
to a single location. Most maintenance is performed to
ensure that everything entering the system comes solely
through fixtures within the community and does not
include stormwater of any sort, known as infiltration.
The parts that need maintenance from time to time
are as follows:
n Manhole covers in the street and what's below
(brick repointing, pavement repair, invert repair)
n Sewer lines (jetting to clean debris and fat,
and sometimes relining)
n Lift stations (float replacement, solids/grease removal,
pump replacement and service)
PRIMARY TREATMENT
Maintenance related to this process is typically
limited to the following:
n Solids removal
n Effluent filter cleaning (typically bi-annually,
but may be quarterly)
SECONDARY TREATMENT
The required oxygen for the bacteria, either fixed
to media or not, is provided by a system of:
n Blower(s)/Fan(s)
n Pumps
n Mechanical Floats
n Control Panel (motor starters, breakers,
PLC and control switches)
TERTIARY TREATMENT
Much of the first step of tertiary treatment is completed as part of secondary treatment. The second step
usually requires additional chemical or physical processes, potentially using the following items that require
supply, maintenance, or replacement:
n Carbon source for dissolved oxygen removal
and food source (Methanol, Micro-C, Sugar, etc.)
n Membrane filter for high level clarity and
bacteria removal
n Activated Carbon
n UV light or other disinfection process
(chlorination, ozonation, etc.)



Table of Contents for the Digital Edition of Condo Media - April 2018

Contents
Condo Media - April 2018 - BB1
Condo Media - April 2018 - BB2
Condo Media - April 2018 - Cover1
Condo Media - April 2018 - Cover2
Condo Media - April 2018 - Contents
Condo Media - April 2018 - 2
Condo Media - April 2018 - 3
Condo Media - April 2018 - 4
Condo Media - April 2018 - 5
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Condo Media - April 2018 - Cover3
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