GE Power & Water
Water & Process Technologies
*
ABMet
SIMPLE ONE-STEP SOLUTION WITH GUARANTEED PERFORMANCE
for Selenium Removal
Superior Reliability
Low Operating Cost
Manage Risk
Refocus on Core Business
Trusted Solution
GE in Your Corner
Simple is best
ABMet meets stringent effluent
selenium requirements as well as
most effluent BOD and suspended
solids requirements in one simple
step. No post-treatment required.
Guaranteed
performance is a must
ABMet systems are backed by a
performance guarantee that manages
the risk of non-compliance and allows
clients to focus on their core business.
Single Nutrient Addition
GE’s single nutrient is automatically
dosed into the common biofilter
feed line to maintain the ORP in the
biofilter within the optimal range
for maximum selenium removal.
Biofilter
As influent gravity flows downward
through the submerged biomatrix
(support media + biofilm), nitrate and
nitrite are reduced to nitrogen gas
first, then selenate and selenite are
reduced to particulate elemental
selenium. When a WASH sequence is
automatically performed, elemental
selenium is removed from the biofilter.
WASH Waste Removal
WASH waste solids are collected near
the top of the biofilter and flow by
gravity to a WASH waste storage tank,
pond, or solids handling system. Waste
is typically decanted and supernatant
recycled to the head of the system for
processing. Waste testing demonstrates
consistent non-hazardous classification
when using the USEPA TCLP test.
Low labor cost – Automatic operation,
remote monitoring and diagnostics with
GE’s Insight* and a one-step process
means that optimal performance
is achieved with minimum operator
resources (less than 1 FTE).
Low consumables cost – GE’s single
nutrient is an all-in-one
of carbon, nitrogen, phosphorus
and micro-nutrients. One injection
point + one chemical system + one
consumable = low operating costs
Superior Reliability – Simple
gravity flow biofilter design and no
integration of multiple unit operations
means no downtime. In the power
industry, availability is critical.
ABMet can meet the industry’s
99.9% availability requirement.
source
Experience matters
From being a breakthrough technology
in the late 1990s to being the
technology of choice for the mining
and power industries today, selenium
removal is in the ABMet DNA.
Manage risk – Guaranteed effluent total
selenium concentration down to below
5 ppb-total selenium.Guaranteed effluent
BOD and TSS concentrations down to
30 and 35 ppm respectively without
the need for post-treatment.
Guaranteed performance down to
a water temperature of 5°C without
the need for pre-heating.
Focus on the core business – ABMet
has a proven track record getting
the job done, enabling our clients to
employ their resources more efficiently
in their core business activities.
Innovative
technology means…
Fast and guaranteed startup – GE’s
seed culture product consists of
specialized bacteria strains optimally
selected for treatment of selenium
laden waters. One-time seeding only.
Optimal performance – GE’s
innovative biofilter design along with
a carefully selected seed culture
and specifically formulated nutrient,
optimize the environment needed
for biological removal of selenium.
Influent from
Pretreatment System
To Pretreatment
System
Single Nutrient
Storage
Feed Tank
Nutrient
Pump Skid
WASH Waste supernatant
Biofilter
Feed Pump
Feed System
The feed system controls the process
flowrate to each biofilter and blends
the nutrient into the biofilter feed
stream via a static mixer before the
stream splits into each biofilter.
WASH Waste
Backwa sh
Supply
WASH Waste Tank
Effluent
Backwa sh
Pump
To Solids
Handling
Effluent Tank
Effluent To Discharge
Backwash System
The effluent tank stores effluent for
periodic backwashing of the biofilter
through the automatic DEGAS and
WASH sequences. DEGAS is a short
duration, periodic backwash for the
removal of gasses from the biomatrix.
WASH is a longer duration, periodic
backwash for the removal of gases and
solids, including elemental selenium.
Trust – With 17 years of biological
selenium removal development,
more than 10 operating plants
and several projects under
development, ABMet is a trusted
technology for selenium removal.
Selenium R E MOVAL solution – ABMet
biofilters are designed to capture
and remove selenium directly,
NOT transform it and transfer it to
downstream processes for removal.
GE is in your corner – GE
innovation and commitment to
performance is working for you.
What can ABMet remove?
ABMet removes nitrate and nitrite to
non-detect levels through a biological
denitrification process within the
biofilter resulting in the formation and
off-gassing of nitrogen gas. ABMet
also removes selenium by biologically
reducing selenate and selenite to
particulate elemental selenium which is
then removed via the WASH sequence.
In what types of applications
ABMet
can
The ABMet system has been demonstrated
in applications treating Flue-Gas
Desulfurization (FGD) wastewaters,
coal power plant ash landfill leachate,
coal mine waters, phosphate mine
waters, metal refinery wastewater,
and agricultural runoff waters.
be used?
What are the process
constraints?
Nitrate-N .........< 250 mg/l
Chloride ..........< 25,000 mg/l
TSS ...............< 250 mg/l
Temperature ......40 to 105ºF (5 to 40ºC)
pH ................6–9
What flow rates can be
treated with ABMet?
ABMet’s innovative modular design is
scalable and can be adapted to treat
any flow rate. Full scale systems have
been designed to treat flows from
3
25 to 1400 gpm (6 to 318 m
/h).
What is included in the
et equipment package?
ABM
GE’s equipment package includes: process,
mechanical, electrical, and control
engineering; process valves, instruments
and pumps; MCC and programed PLC/HMI;
air compressor system, nutrient dosing skid,
biofilter, storage tank, equipment warranty,
biological support media, seed culture,
first-fill of nutrient and onsite commissioning.
Is GE’s Seed Culture
harmful?
No. The seed culture contains non-pathogenic,
naturally occurring Class 1 bacteria. These
species are commonly found in natural
environments such as pond water and
garden soil.
Do I need to reseed the
plant or maintain a backup
supply of the seed culture?
Microbes form a fixed-film on the support
media and as a result do not wash out of the
system as they do in suspended-growth
systems. As a result, reseeding and
maintaining a backup supply of the seed
culture is not required. If customers
want to have a backup supply of seed
culture, GE can offer storage programs
when requested.
What are the typical power
and overall operating
et
costs of an ABM
Typical power consumption is less than
0.5 kW per 1,000 gallons treated (0.13
3
kW per m
costs typically range between $0.1 to
$0.5 per 1,000 gallons of water treated.
treated). Overall operating
system?
What is the lifespan of
the support media?
Since the support media’s sole
purpose is to support the fixed-film
created by the microbes and is not for
treatment purposes, it doesn’t need
to be replaced or regenerated. Less
than 1% attrition is expected in most
applications due to backwashing and
one small top-up may be required
within the first 5-years of operation.
How quickly can ABMet
be implemented?
The timeline is highly dependent upon the
nature of the site as well as overall treatment
goals, but ABMet’s modular approach
provides the fastest possible implementation
with pre-fabricated tanks, pump skids and
pre-engineered layouts to suit your needs.
How do I know if ABMet
is the right solution
for my application?
ABMet is an option in all applications requiring
selenium removal. A GE representative
can assist you in further qualifying the
technology for your specific requirements.
How do ABMet capital
costs compare with other
biological systems?
ABMet provides selenium removal with
one simple step. Other biological systems
require numerous unit operations to
remove selenium and keep organics below
discharge limits. This is because these
systems only transform selenium from one
form to another (selenate to elemental Se)
and then rely on other unit operations to
remove the elemental selenium along with
TSS and organics. With ABMet, selenium
is transformed, captured and removed all
within the biofilter while keeping TSS and
organics below most discharge limits.
Does backwashing of the
biofilter upset performance?
Periodically backwashing the biofilter
keeps the fixed-film healthy by removing
excess biomass. Removal through the
waste stream is independent of the effluent
stream. This separation makes sure that
effluent quality is not compromised due
to backwashing. Other systems such
as fluidized bed reactors constantly
backwash. The biomass and other
particulates, such as elemental selenium,
are dislodged and removed from the
reactor through the effluent stream placing
pressure on downstream systems to clean
it up before discharging to the environment.
What are the waste
handling requirements?
ABMet produces one waste stream
typically with less than 0.5% solids that
can be sent to existing waste handling
systems and the supernatant recycled
through the plant. Other biological
systems that require multiple unit
operations to remove selenium will
have several different waste streams
that require handling and processing.
Contact our team of global experts for more
information or a plant specific presentation.
Global Headquarters
4636 Somerton Road
Trevose, PA 19053 USA
Tel. +1 215 355 3300
www.gewater.com
This information herein may be subject to change without
notice and is provided for general guidance only. The
dimensions and performance of systems, products and
services may vary. Pictures are for example purposes and
not to scale. All legal obligations are exclusively as set
out in contractual documents. Nothing contained herein
constitutes a representation, warranty or undertaking.
* Trademark of General Electric Company
Copyright © 2013, General Electric Company. All rights reserved.
GEA30693 (08/2013)
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