Bord na Mona Environmental Products US

HAWTHORNE COURT WWTP

• UTILIZING PURAM
• MEMBRANE TECHNOLOGY

Proposal

Date	Reference	Edition	Prepared by	Checked by
7/13/09	0924-022	Proposal	RM	SK

Contents

• Introduction
• Design Criteria
• Equipment Description
• Project Description
• Scope Of Supply & Price
• Scope & Responsibility Clarifications, Conditions Of Contract And Schedule

Introduction

Membrane bioreactor proposal for a treatment facility at Hawthorne Court WWTP.

Particular advantages of our PuraM technology include:

1. a proven technology with over 5 years operation
2. system designed specifically for decentralized / small flow applications
3. pre-engineered high quality package plant
4. enhanced air scouring distribution system which extends the duration between chemical cleans to 12 months without the requirement for on-site chemicals or back pulsing
5. excellent treatment performance achievable from the PuraM system that is guaranteed to meet both winter and summer ammonia nitrogen requirements
6. designed for ease of operation & maintenance and reduced complexity compared to other comparable membrane systems through features including gravity flow to eliminate the need for permeate pumps, no chemical dosing, and no back pulsing
7. cassettes manufactured in the USA

Bord na Móna Environmental Products U.S. Inc., based in North Carolina, are committed to developing a range of innovative, wastewater treatment, water reuse & VOC / odor control technologies focused on water conservation, energy reduction and reduced chemical demand that provide superior performance to homeowners, communities & municipalities and significant benefits to our environment.

Bord na Móna is a multi-national utility company with over 60 years experience, 2,000 employees and annual revenues in excess of $500 million specializing in the energy and environmental technology sectors.

Design Criteria

The flows and loads provided by the Client and used as the basis of our design are detailed below:

Note: Due to the effluent produced by a MBR system being close to detection limits the measured performance will be dependent on the sampling, sample preparation and analytical techniques used.

Equipment SPECIFICATIONS

PuraM Membrane Biological Reactor

The process utilizes flat plate membranes designed and manufactured by Bord na Mona in the USA assembled into a 50 plate cassette submerged at the base of the reactor.

The membrane is an ultrafiltration membrane with a nominal pore size of 0.05 microns and a typical flux rate of 25 l/m2/h. The life of the membrane material is in excess of 7 years.

An enhanced air grid design is incorporated at the base of each membrane cassette consisting of dedicated air distribution pipes with specific hole sizing and spacing to provide the optimum scouring efficiency. The enhanced scour design and optimal spacing between the plates prevents fouling, reducing the requirement for chemical recovery cleaning to 12 months an important factor for small flow / decentralized membrane plants.

Each cassette frame has an air supply pipe, an air distribution grid, clean water (permeate) discharge pipe and lifting lugs which protrude above the liquid surface. The air requirement will be supplied by two duty air blowers situated adjacent to the tank. Additional process aeration to the biomass is provided by Fine Bubble Diffused Aerators.

The volume of the tank is based on activated sludge design operating at MLSS (Mixed Liquor Suspended Solids) levels of up to 12,000 mg/l with a sludge age of 20 to 25 days.

The MBR process plant will comprise of a concrete tank (by others), including aeration and anoxic sections that are 12-feet high and 9’-6 feet wide. Recirculation from the aerated membrane section of the tank will be provided by recirculation pumps.

All membrane systems incorporate a relax period, typically 5 minutes/hour. This is allowed for in the design by shutting off the outlet flow for the specified period while allowing sufficient freeboard in the tank to allow the inlet design flow to continue entering the tank.

All membrane systems require periodic recovery cleans. This is achieved by immersing the cassettes in a sodium hypochlorite solution for a period of up to 12 hours every 12 to 18 months. In hard water areas a further immersion in citric acid is recommended. Our standard proposal includes provision of a chemical clean tank sufficient for cleaning one membrane cassette.

Nitrification

Nitrification of the wastewater will occur in the membrane / aeration tank. Where required the plant can be seeded with sludge from a local nitrifying wastewater treatment plant to reduce the time to establish nitrifying bacteria.

A chemical dosing facility is provided to ensure that the wastewater contains sufficient alkalinity to sustain the nitrification reactions. For nitrification to occur 7.14 grams of alkalinity (measured as CaCO3) for each gram of ammonia removed must be available in the wastewater.

Dentrification

Denitrification shall occur through recirculating the MLSS in the membrane reactor to an anoxic tank at the head of the works. The anoxic tanks shall be provided with mixers.

Where a recirculation membrane is provided for denitrification a sufficient BOD level in the incoming wastewater is required to allow denitrification to occur. Typically 2.72 mg BOD5 are required per mg of NO3-N removed. This is particularly important for commercial applications such as offices & schools where the BOD is low compared to the Ammonia levels. Where insufficient BOD is available a carbon dosing system will be required. We have not included a carbon dosing system in our offer at this stage.

Electrical & Instrumentation

The required power and controls shall be provided in a motor control panel for the membrane unit with either integrated or proprietary panels provided for the chemical dosing systems. We recommend that the plant be provided with a remote alarm call-out system. Instrumentation is provided in accordance with the specification.

Project Description

We have allowed for all equipment to meet the performance requirements of the specification including:

1. Process design and submittal documentation for the membrane treatment system.
2. Blowers including pipework and valves.
3. Membrane cassette system (2 streams of 9 cassettes per stream) including scour air pipework, permeate pipework & valving within the tank and fabricated support steelwork within the tank.
4. Diffused air system including pipework
5. Recirculation pumps.
6. Anoxic mixers.
7. Control panel.
8. Instrumentation including flow meters.
9. Assistance at the site during commissioning.

Exclusions

1. Cast in place tankage, which includes the trash trap, equalization tanks, anoxic tanks, aeration tanks, membrane filtration tanks, and sludge holding tank. Also, precast concrete tankage includes the influent pumping station, two (2) valve vaults, two (2) distribution boxes and thirty-one (31) leaching pool outlet structures;
2. Mechanical systems including the Influent lift station pumps, EQ tank transfer pump system, Static influent screen, comminutor, odor control system & ducting, Influent pumps, equalization transfer pumps, sludge decant pumps and effluent dosing pumps; float switches; mix flush valves; lifting davits, safety equipment, portable blower, tools, spare parts, chemical dosing system
3. Electrical control system including motor control center, controls, alarms, valves and appurtenances; electrical installation including Conduits, fittings, wiring, switches, receptacles, load centers and disconnect switches Grounding Service Entrance and Surge Protection
4. Pre-Engineered Building - Building shall have hot and cold running water, backflow preventer, heating and ventilation equipment, lighting, electrical distribution equipment, receptacles, office and lab equipment, safety equipment Lighting Heating and Ventilation Equipment and all other equipment shown on the Contract Drawings or noted elsewhere in these Specifications.
5. Diesel powered standby generator system along with automatic transfer switch.
6. All components and materials for the wastewater disposal fields.
7. All equipment not detailed as being in our scope of supply

Price

The Price for M&E equipment is $1,050,000, exclusive of sales and other taxes.

SCOPE & RESPONSIBILITY CLARIFICATIONS, CONDITIONS of CONTRACT AND SCHEDULE

Our technical and commercial assumptions are detailed below.

Scope of supply & Responsibilities

1. The plant has been designed in accordance with the influent parameters detailed in Table 1. The client is responsible for advising us of the influent wastewater characteristics and any risk associated with performance where the influent conditions exceed the indicated range of design conditions.
2. The Client is responsible for determining the Design maximum daily flow, the Design peak hourly flow, the minimum flows and flow phasing that the treatment works is to be designed for.
3. The Client shall be responsible for securing and paying all costs associated with permits, consents, licenses and any regulatory approvals.
4. The Client is responsible for overall design of the system including site layout, site survey, hydraulic profile, all civil design, sewer pipe and outfall design, pumping station design where outside of our supply, site drainage, buildings, noise / odor specification and site services such as power supply, potable water supply etc.
5. The flux rate and oxygen transfer design has been based on a MLSS temperature range shown in Table 1. It is therefore important to advise us if the design temperature is outside the specified range.
6. Client is to confirm phasing requirements detailing the flows to be treated from start up to full design flow. The membrane operates at a high MLSS which requires sufficient loading to sustain treatment performance.
7. Grease and grit removal systems where required are to be provided by the client. Any FOG in the influent is to be reduced to a target level of 30 mg/l prior to entering the treatment unit through provision of septic tanks with sufficiently specified effluent filters or proprietary grease removal technology supplied by the client.
8. We have not included the required alkalinity dosing system in our proposal.
9. Where chemical dosing systems are required the client is to advise if local regulation requires emergency showers or eyebaths. Our standard design and pricing does not include for emergency showers or eyebaths.
10. Pipework to and from the treatment plant and final pipework connections are to be provided by the client.
11. The client shall be responsible for the design, supply, installation, and commissioning of all sitework. We have not included for any sitework design in our proposal or for any mutually agreed amendments or additions to sitework required by changes to the mechanical plant. Sitework is deemed to include all excavations, concrete construction, slabs, bunds, temporary & permanent access roads, buildings, fencing, gates, lighting, cable ducts, draw pits, trenches, chambers, manholes, backfilling / reinstatement, pipework set in concrete and core drilling / grouting in / filling around pipes, cables etc, diversion of site services, site drainage including channels & gratings, handrails, flooring, stairs, ladders, platforms, temporary works for the control of ground water, temporary or permanent potable water supply for the purposes of chemical make-up or commissioning, any building services or firefighting equipment.
12. The client shall be responsible for the design, supply, installation, and commissioning of all mechanical & electrical equipment not in Bord na Mona’s scope of supply.
13. The client shall provide all permanent site facilities including toilets, locker facilities, offices, safety equipment etc.
14. The client shall be responsible for the provision of temporary site huts, toilet facilities, site security, providing hard surface storage areas for equipment delivered to site, temporary scaffolding and temporary access arrangements to enter tanks, safety barriers, first aid etc during the installation & commissioning phases.
15. The standard control panel, blowers and any chemical dosing equipment will be supplied with integral enclosures rated for external use.
16. The standard treatment units are provided with open top tanks, client is to advise us if covers are to be provided.
17. We have not included for the provision of a power supply or transformer to our control panel or termination of the power supply to the control panel.
18. Client is to advise us if a remote monitoring system allowing call-out for alarms or a web based remote monitoring of system performance is required.
19. The client shall provide details of local electrical regulations that the plant must comply with. If no specific requirements are advised the plant shall be supplied in accordance with our standard designs.
20. Within our offer we have included for duty / standby plant items only where indicated. We recommend a review to confirm the requirement for standby equipment.
21. We have not included for provision of standby power generation facilities.
22. Due to the infrequent access required we have assumed that permanent access ladders & walkways and lifting equipment are not required. The client is to advise us if permanent access is to be provided.
23. Removal of the membrane cassette is envisioned to be by crane - client is to provide permanent lifting equipment.
24. We have not included for any permanent lifting facilities, sampling devices, emergency showers, trace heating & lagging or any signage / pipe identification requirements.
25. We have not included for davits or lifting devices for pump removal, our standard offering shall assume that pumps are to be removed by hired cranes or portable lifting devices supplied by the client.
26. Client is to advise us if spares are required from list provided by Bord na Móna - there is no provision for spares in the standard price.
27. The cost of transportation to site will be confirmed when an exact delivery address is advised and accessibility for a sufficiently sized truck is confirmed. The client is to provide a secure storage area for materials delivered to site.
28. Suitable and unhindered access is to be provided by others to allow access for a 40 feet truck and installation & commissioning activities. In estimating the craneage costs we have assumed that the unloading will be completed in one visit and that adequate access will be available to a hard surface area adjacent to the structure along hard surface roads.
29. Emptying or cleaning out of existing or new structures is the responsibility of the client as is any temporary works required to maintain the operation of any existing plant.
30. We have not included for installation of the components within our scope. Electrical installation by others is assumed to include the provision of all electrical cabling, cable trays, ducting, and associated equipment including emergency stops. Mechanical installation by others is assumed to include the supply of chemical dosing lines & tapping of pipework for the chemical injection point, the supply of pipework supports, pipework bridges, access walkways, hand rails, any potable water supply pipework etc.
31. The tank, blowers & control panel will be delivered during the installation phase. The membrane cassette will be delivered when the client advises the imminent commencement of flows in order to minimize any potential damage to the membranes.
32. It has been assumed that commissioning will follow within a reasonable time after erection, where additional time on site or further visits are necessitated by factors outside of our control, this may be subject to an additional charge.
33. Commissioning will be undertaken in accordance with Bord na Móna standard commissioning procedures & documentation. Client is to advise us if specific turnover or compliance testing, procedures, reports or documentation are required.
34. Where the permanent power supply is not available during the installation or commissioning phases a temporary supply is to be made available by the Client.
35. Commissioning costs have been based on allowing the wastewater flow to discharge to the disposal area while the treatment process builds up to the consent standard. It is the client’s responsibility to supply, where required, any temporary construction or tankage required during commissioning in order to meet permit standards.
36. We have not included sludge seeding at the commissioning stage within our current pricing.
37. Our commissioning personnel will be on site at times determined by Bord na Móna during the biological commissioning of the plant; however we have not included for the cost of power, chemicals, sludge disposal, operational staff, temporary construction during commissioning or any other operation and maintenance costs. A supply of potable water is to be made available to Bord Na Móna for commissioning free of charge.
38. During biological commissioning we will undertake site analysis of the final effluent to establish how well the plant is performing, however, we do not include for taking or analyzing any samples for the purposes of establishing compliance with the final effluent consent. We have assumed that such testing will be undertaken by the client.

Conditions of Contract

1. The information contained in our proposal documents is confidential and no part thereof or any subsequent information shall be disclosed to any third party without the written consent of Bord Na Móna.
2. Our offer is limited to the supply of equipment detailed in our proposal, all additional materials and labor requested by the client , will be subject to an additional charge.
3. The warranty period shall be 12 months from completion, i.e. the point in time when Bord na Móna’s scope of equipment supply is ready to commence operation.
4. Bord na Mona shall in no event be liable to the Client, by way of indemnity or by reason of any breach of this Agreement or in tort or otherwise, for loss of profit or loss of any contract or for any indirect special or consequential loss or damage which may be suffered by the Client in connection with this contract.
5. Our budget price is valid for a period of 60 days from the date of issue of this proposal.
6. Terms of payment shall be 30 days from issue of invoice subject to a late payment interest charge of 1% per month in accordance with the following stage payments
1. 10% upon contract award
2. 25% upon design completion
3. 60% upon delivery of equipment to site
4. 5% upon completion of commissioning
7. Commencement shall be from the date of written confirmation by Bord na Móna accepting an official order. A letter of intent and down-payment of 5% of the contract price will be acceptable to commence the design phase however the procurement phase will not commence without the receipt of official order and confirmation by Bord na Móna.
8. Acceptance of an official order and any required changes must be confirmed in writing.
9. We request that the facility may be used by Bord na Móna as a reference site, where reasonable access will be allowed by the client for the purposes of site visits by other Bord na Móna customers.
10. We would be pleased to discuss options for additional services including remote monitoring, and other technical assistance.

Schedule

The typical critical path delivery period following commencement, i.e. the date of written confirmation by Bord na Móna accepting an official written order or receipt of letter of intent & down-payment is detailed below:

1	Design	- 6 weeks
2	Procurement	- 4 weeks
3	Manufacture	- 12 to 14 weeks
4	Installation	- by others
5	Commissioning	- full performance average 6 to 12 weeks after commencing flow to the treatment system, dependent on influent characteristics and weather conditions.

The schedule does not include for any design approval periods required by the Client. We will consider ways to accelerate the schedule where required by the client.