Water Journal : Water Journal September 2011
108 SEPTEMBER 2011 water water business System Performance Guarantee Invent owns and operates one of the largest purpose-built oxygen transfer test tanks in the world. Located at the production headquarters in Erlangen, Germany, the test facility is fully instrumented, providing high accuracy dissolved oxygen and air flow monitoring. All instrumentation readings are controlled and data logged back at a central control centre. Invent guarantees all aeration system designs to globally recognised ATV and ASCE standards. Aeration Design Services Invent offers a no obligation design service to assist in the sizing of aeration basins. This includes calculation of AOR and SOTR, tank dimensioning, possible layout alternatives, supply air requirements and blower sizing recommendations. Invent is also perfectly positioned to advise on a (Alpha) factors and fouling allowances for both municipal and industrial water treatment. For more information email: info@invent- pacific.com or phone 02 6365 0702. LOW-COST SOLUTION FOR AGEING SEWAGE TREATMENT PLANTS Ageing sewage treatment plants can present both a treatment and environmental headache for many municipal authorities around Australia, particularly in regional and remote communities. Actual flows may exceed the design capacity of the treatment plant, effluent quality may struggle to meet environmental licence conditions, and in some instances community or government pressures may be demanding higher qualities of effluent than what the treatment process is capable of producing. Constructed wetlands are an excellent low-cost solution that can be easily added on the back end of ageing STPs to help provide much needed improvements. When designed properly, wetlands can seamlessly integrate into an overall treatment process without disruption to the ongoing functionality of the STP. They are a significantly lower cost option compared to building a new STP and can be implemented quickly to address immediate issues, delaying large future infrastructure investments. Being a non-mechanical solution, they use no electricity, have a low carbon footprint, are resilient to flooding, and require little maintenance. The effluent produced from a well-designed wetland is also less variable and has lower nutrients than many modern BNR plants. The design philosophy of constructed wetlands has changed over the last 20--30 years. When constructed wetlands were first trialled in Australia in the '80s and '90s, the results were by no means impressive. The performance was inconsistent from one site to another and the design approach varied. The early wetlands in Australia in some respects were designed "blindly" as the mechanisms of treatment were not widely understood, and in some cases the wetlands made the effluent quality worse. Unfortunately, many wastewater professionals in the industry have based their view of constructed wetlands on these failures, without realising that the technology has come a long way over the last couple of decades. new products & services At EcoCatalysts we're the experts at reducing your operation & maintenance costs. u Wastewater u Odour Control u Bio-Remediation EcoCatalysts is bringing about a fundamental transformation in the advanced treatment of our water resources and bio-remediation. Our Product Range Covers Call: 1800 207 009 Email: email@example.com Web: www.ecocatalysts.com.au Come & See Us at AWA NQ Regional Conference 2011 Booth 7 The trickling filter at South Lismore STP is coupled with a constructed wetland.
Water Journal November 2011
Water Journal August 2011