Water / Wastewater Treatment


Spare Parts and Consumables


This is the smallest cost factor, not having big impact on final decision since variation between different suppliers of vacuum distillation systems are too small.


Analysis – Surprising Results


The result of the LCC surprises. Impact of consumption figures and work load involved in operating the system is three times higher than impact of investment cost. Figure 1 shows different cost factors and their variation depending on suppliers’ information.


Figure 3 shows that efforts for operation of the system, evaporation rate and consumption


figures have much bigger impact on company earnings of tomorrow, compared to investment cost. In the chosen example the vacuum distillation system can save € 1.2 – 1.3 Mio.


More than 10% of theses savings depend on the right selection of the supplier of the vacuum distillation system. LCC has proven to be a good instrument to prepare investment decision.


Not the best price is the most important cost factor – optimised total operation costs ensure tomorrow’s company earnings.


Scum-free Anaerobic Tanks


Decision in favour of a specific supplier of vacuum distillation systems is not easy to take.


Many different factors are to be considered. Particularly in times of restricted budgets it is shown that investment cost is not the most important topic.


Efforts for operating the vacuum distillation system, evaporation rate and destruction costs


have far more impact on the total operation cost of the system, whereas the biggest potential for savings are work load involved, maintenance and repair. Thus it makes sense to carefully analyse work load, reliability, maintenance friendliness and service quality. Finally it is not the lowest price but the lowest operation cost ensuring the tomorrows earnings.


Advantages of Life Circle Cost Analysis for Vacuum Distillation systems:


Earnings of tomorrow are optimised since not only investment is focused on, operation costs are considered as well


No surprises, all cost factors are looked at, project is transparent Suppliers quotations become compareable, investment decisions are easier


Membrane Reactor Tackles New Zealand’s Tough Wastewater Treatment Regulations


To comply with stricter environmental requirements, Rotorua, New Zealand has selected GE’s (USA) advanced bacteria-removing membrane bioreactor (MBR) technology for the upgrade of the city’s wastewater treatment plant. This will be the largest MBR plant in New Zealand and also marks the first use of the GE MBR technology in the country.


GE will supply an MBR filtration system featuring its ZeeWeed* 500d ultrafiltration (UF) membranes to the Rotorua District Council for the


upgrade project, which is expected to be completed by June of 2011. The MBR retrofit will enhance the plant’s capacity to handle its growing wastewater treatment needs and meet the country’s tighter discharge regulations without building additional, costly structures, such as clarifiers or process tanks. The wastewater treatment plant serves about 70,000 people.


GE’s MBR technology will enable Rotorua to significantly reduce the concentration of faecal coliforms (a form of harmful bacteria) in the


plant’s discharge water. GE will work closely with Rotorua District Council’s in-house engineering unit, HYDRUS Engineering Consultants, and engineering company AWT New Zealand Ltd. to deliver this state-of-the-art facility in New Zealand.


“The retrofit solution will enable the plant to process increasing flows and meet the latest environmental discharge criteria while reducing


structural costs and making good use of the existing infrastructure,” said Greg Manzano of the Rotorua District Council. “Our selection of GE’s technology was based largely on the company’s broad experience, proven track records and success with wastewater treatment projects worldwide.”


GE’s ZeeWeed membrane technology has been proven for more than two decades for wastewater treatment and water reuse. GE has the


world’s largest installed base of MBR systems that use ZeeWeed UF membranes to produce the highest quality of water for reuse. More than 600 of GE’s ZeeWeed 500 MBR plants are in operation, in design or under construction worldwide and are becoming widely deployed for small to very large municipal and industrial plants.


BNR (Biological Nutrient Removal) Plants are still relatively scarce in the UK. In many other European countries, BNR Plants are far more common – as is an awareness of some of the problems associated with running them.


One of the biggest challenges facing BNR operators is the formation of surface scum on the Anaerobic and / or Anoxic Tanks. If not removed continuously, this scum can build up and cause process issues which should not be underestimated. These include reduced retention time, high suspended solids in the final effluent, and poor overall plant performance.


Corgin (UK) were recently called in to propose a remedy for


scum that was building up rapidly on a newly-constructed Anaerobic Tank. Over the course of a few weeks the scum would build up to a depth of 3 ft. With no way of escape from the square tank, a vacuum tanker with two operators had to be called in fortnightly or monthly to suck out this sticky, odorous mess.


Based on successful European installations over 15 years and other installations in the UK wastewater industry, Corgin recommended the Foam Skimmer. This unique equipment design removes surface scum and foam, collapsing and thickening it to between 3% and 6% dry solids before pumping it away for disposal. This low-energy, high solids method of removal is a sustainable way of dealing with such problematic scum build-ups.


Within days of commissioning the Foam Skimmer, the


Anaerobic Tank was sporting a near scum-free surface. For the first time since the BNR Plant was commissioned, operators could see the water surface.


Reader Reply Card No 17


“As our first project in New Zealand, this is another milestone for our wastewater treatment technology,” said Jeff Connelly, vice president, engineered systems—water and process technologies for GE Power & Water. “We have been working closely with the Rotorua District Council since March of 2009 to develop the best technology solution to meet the city’s specific wastewater needs.”


ZeeWeed 500 is certified as a GE ecomagination product. Ecomagination is GE’s commitment to address challenges such as the need for cleaner, more efficient sources of energy, reduced emissions and abundant sources of clean water.


Reader Reply Card No 16


Highly Efficient Process Water Treatment Plant for a Global Beverage Producer


VeoliaWater Solutions&Technologies has been awarded a contract by one of the two major beverage worldwide producers to provide and commission highly-efficient technologies to cover the process water cycle for an additional CDS (carbonated soft drinks) production site on existing manufacturing facilities in Vietnam.


In order to answer to the customer’s requirements in terms of process water needs, Veolia Water Solutions & Technologies’ offer will include the supply of a process and a high-end RO system for CSD (carbonated soft drinks) water treatment installation, with a treatment capacity of 25m3


/hr. Beyond this production system, Veolia Water Solutions & Technologies’ processes will also include Iron Reduction, Sand filter, Activate


Carbon Filter, storage tanks and UV, to complete the whole process cycle. Reverse osmosis (RO) is a process that uses a membrane to remove over 95% of dissolved salts, such as calcium bicarbonate and sodium


chloride, from water. It also acts as a very fine filter removing 99% of suspended and colloidal solids, bacteria and organic molecules with molecular weights in excess of about 200Da. This makes the process particularly attractive for applications where treated water not only has to be low in TDS (total dissolved solids) but also of high clarity and free from bacteria such as that used for soft drinks manufacturing.


With more than 25 years of experience in South East Asia, Veolia Water Solutions & Technologies provides the Food & Beverage industry with the most comprehensive water treatment solutions from process water to recycling & reuse and from effluents to sludge treatment.


By appointing Veolia Water Solutions & Technologies for one of its South East Asian facilities, the customer made the choice of efficient technology comprising VWS expertise and experience in terms of treatment performance.


Reader Reply Card No 18


www.pollutionsolutions-online.com • Annual Buyers’ Guide 2011


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