Custom-Designed Wastewater Treatment Plants

DESIGN AND BUILD CUSTOM
WASTEWATER TREATMENT PLANTS
(EXTENDED AERATION)
Step 1: Design the WWTP and coordinate with other
professionals and contractors
Step 2: Fabricate the precast concrete tanks and components
Dutchland, Inc. has over 25 years of experience
designing, manufacturing, and constructing
wastewater treatment plants. During this
time, Dutchland, Inc. has manufactured and
constructed hundreds of wastewater treatment
plants in a number of states.
Typical services include:
• Design the structures, equipment, instrumentation, and controls.
• Produce plans, process design report, and
submittals.
• Manufacture precast concrete structures and
other related components.
• Pre-assemble equipment.
• Assemble the precast concrete structures and
plant mechanics.
• Complete start-up / equipment operation
verification.
• Provide the plant start-up session, operator
training, and option for contract operations.
Plants are designed to meet various limits,
including:
• Pretreatment for Publicly Owned Treatment
Works (POTW)
• Secondary (20 mg/l BOD, 20 mg/l TSS)
• Tertiary (< 20 mg/l BOD, 20 mg/l TSS)
• Biological nutrient removal (Total Nitrogen 8
mg/l and phosphorus 0.5 mg/l).
Step 3: Install the precast concrete structures
Dutchland, Inc. has extensive experience
with designing, manufacturing, and
constructing Wastewater Treatment Plants
INTERFACING WITH OTHER
PROFESSIONALS AND CONTRACTORS
The Project Engineer provides influent and
effluent limits to Dutchland, Inc. For private
projects, Dutchland, Inc. provides a proposal to
design, manufacture, and construct the plant.
Ultimately Dutchland, Inc. provides design
information required to approve the WWTP
(plans, process design report, submittals and
specifications). The Project Engineer submits
the information provided by Dutchland, Inc. to
the necessary approval agencies. The Project
Engineer provides the other parts of the facility
design, including E&S / site, building, and
electrical.
Step 4: Install the mechanical, plumbing, instrumentation, and
controls
Dutchland, Inc. provides the process design
information to the Project Engineer to
expedite the approval process
OPERATIONS AND SERVICE
When the construction phase of the project is
complete, Dutchland, Inc. provides a start-up /
training session for the owner and operators of
the facility.
Step 5: Completion of the Construction phase
Dutchland, Inc. provides the owner’s of local
facilities the option for contract operations
(approximately 100 mile radius from Lancaster
County, PA). Operations by Dutchland, Inc.
insures the highest level of complete turn-key
service by Dutchland, Inc.
Service personnel are on call 24 hours a day
and are equipped to be able to handle small and
largejobsquicklyandefficiently.
Dutchland, Inc. provides contract
operations and service
Step 6: Provide start-up services and operator training
BNR AND THE BIO-D™ EXTENDED AERATION PROCESS
Effluent requirements from wastewater treatment plants continue to become more stringent. Biological Nutrient Removal
(BNR), i.e. total nitrogen and phosphorus is a concern in many
states by Environmental Activists, Engineers, State Regulatory
Agencies and the EPA. Dutchland, Inc. is prepared to
address BNR requirements by utilizing the BIO-D™
Extended Aeration process.
The Bio-D™ Process can easily be designed for new and
existing facilities. Retrofitting an existing facility for BNR
requirements can be done with little modification to the existing facility. New Anoxic Tanks are installed in the area of the
existing facility. With minor plumbing revisions and the addition of a recycle system, the retrofit can be done quickly and
cost-effectively.
The BIO-D™ Extended Aeration Process has many
benefits, including:
1. The technology is easy to understand, making the plant
operation simple and consistent.
2. The raw wastewater provides the natural energy (carbon)
source required for denitrification. Chemicals such as methanol
are not required.
3. The BIO-D™ process is a cost-effective way to meet BNR
requirements, typically costing less than competing technologies. Replacement parts for items such as diffusers, pumps,
mixers, etc. are readily available and are non-propriotary.
3. The BIO-D™ process can be easily implemented into existing facilities.
5. Incorporating the BIO-D™ process provides biological
benefits, including the reclaimation of alkalinity, BOD consumption as an energy source for denitrification, biological
reduction of phosphorus, and more.
HOW DOES THE BIO-D™ EXTENDED AERATION PROCESS WORK?
The BIO-D™ Process is a version of Extended Aeration
utilizingModifiedLudzackEttinger(MLE)principals,within
tolerances, guidelines, and standards established by Dutchland,
Inc. The MLE process is a proven technology that has been
in existence since the early 1970’s. The process incorporates
dual environments of both oxic (aerated) and anoxic (nonaerated, mixed) conditions in separate areas of the plant to
firstaccomplishnitrificationthendenitrification.Nitrification
occurs in the aeration tanks of the extended aeration process.
A recirculation system is implemented to pump the nitraterich contents in aeration to the anoxic zone at the head of the
plant, directly downstream of equalization. At this strategic
location, the anoxic tanks receive all of the energy rich BOD
oftheinfluentwastewateraswellastherecyclednitraterich
contents of the aeration process. The biological culture within
the anoxic zone utilizes a portion of the BOD as a carbon food
source, and utilizes the nitrates as a source of oxygen, as no
oxygen is added in the anoxic zones. The nitrates are converted
to a harmless nitrogen gas in the process. Mixers in the anoxic
tanks provide the necessary suspension and mixing of the
wastewater, and facilitate the release of the nitrate gas bound
within the wastewater to the atmosphere.
The recycle rate of aeration to the anoxic zone is designed
forapproximately400%oftheaveragedailyflow.Dissolved
oxygen levels of 1.0 to 2.5 need to be maintained within the
aerationtanksfornitrification.Theanoxictankdissolved
oxygenlevelsneedtobelessthan0.5fordenitrification,with
the preferable range being 0.15 to 0.3.
The BIO-D™ process is generally capable of reducing the
total nitrogen level (NO2 + NO3-N + TKN) to average monthly
rangesof6.0mg/lto8.0mg/l,dependingontheinfluentconcentration of ammonia nitrogen, temperature, and other factors.
In addition, by utilizing a phosphorus precipitation chemical
such as alum, phosphorus can generally be reduced to 0.5 or
less. The BIO-D™ technology facilitates biological phosphorus reduction, therefore less chemical, such as alum is required,
while providing a greater level of phosphorus reduction.
SOUTH WOODBURY
WASTEWATER TREATMENT PLANT
NEW ENTERPRISE, PA
0.25 MGD
Designed, Manufactured, and Constructed
by Dutchland, Inc.
Dutchland, Inc. provides in-house design work for Extended
Aeration wastewater treatment plants, as well as manufacturing and
construction. Extended Aeration plants can meet most of the effluent limits established today, including tertiary treatment and BNR
treatment.
For wastewater treatment plants other than Extended Aeration,
Dutchland, Inc. provides the structural design and tankage, with
an option to install the equipment, instrumentation, and controls.
Additional Information is available for Rectangular PostTensioned Structures, Circular Post-Tensioned Structures , and
Operation / Service Contracts.
DUTCHLAND, INC. FACILITY
ABOUT DUTCHLAND, INC.
•Dutchland,Inc.isaNPCAcertifiedprecastconcretemanufacturingfacility
withACIcertifiedQualityControlpersonnelandPTIcertifiedinstallation
personnel.
•Dutchland,Inc.isrecognizedbytheNPCAasoperatingoneofthehighest
quality precast concrete manufacturing Facilities in the United States.
•AllprecastconcreteismanufacturedinLancasterCountyPennsylvaniaand
delivered to the job site.
•Dutchland,Inc.specializesinmanytypesofprecastpost-tensionedconcrete
structures, including circular, rectangular, and elliptical structures.
•Precastpost-tensionedconcretestructuresareusedforwaterstorage,
wastewatertreatment,effluentstorage,andmanyotherpurposes.
160 Rt. 41 • PO Box 549 • Gap, PA 17527 • Phone 717.442.8282 • Fax 717.442.9330 • www.dutchlandinc.com