This power utility has a demin plant which has acid and caustic dosing for regeneration. Concern about safety of the dosing systems prompted engagement of Paul Grover & Associates to review the safety and operational aspects of the plant. A report was provided and the recommended upgrades have been implemented.
A number of Council operated swimming pools utilized gas chlorine for disinfection. There was concern about the safety of storing gas chlorine cylinders on site. An alternative method of chlorination was sought. Paul Grover & Associates was engaged to review different options for chlorination including sodium hypochlorite, calcium hypochlorite and on-site generated chlorine. Each option was presented with operational/safety aspects and life cycle costs. Council decided to use sodium hypochlorite and the recommended plant upgrade has been implemented.
Dioxide Pacific engaged Paul Grover & Associates to design ozonation systems to disinfect bottled water at the four sites for an international bottled water producer.
Design criteria for the systems included conformance to IBWA disinfection guidelines. Ozone residual to be tightly controlled within an ozone reaction tower and afterwards to achieve CT value for disinfection and not cause taint to filled bottles. System design was completed and systems installed by Dioxide Pacific. The systems are successfully operating today.
Dioxide Pacific engaged Paul Grover & Associates to design fluoride (FSA) dosing systems for four Water Authorities in Victoria, Australia. Critical components of the design included storage and handling of fluorosilicic acid in a safe and operator friendly manner, along with control of fluoride residual to +/-0.05ppm. The plants were installed by Dioxide Pacific and are operating successfully today.
A municipal sewage treatment plant was operating a very old hypochlorite generator at on an odor scrubber to control H2S and mercaptan odor. This system was not obtaining the necessary odor reduction results and the chemical dosing regime required rectification. Dioxide Pacific engaged Paul Grover & Associates to design controlled hypochlorite and caustic dosing to obtain odour reduction. The system was installed 5 years ago and has undergone a number of subsequent upgrades to improve OH&S aspects.
Milk powder is manufactured by evaporating water from milk. The condensate produced is high in thermophiles and a good breeding ground for bacteria. For re-use, the condensate must be disinfected. Chlorine cannot be used as it will react to give a taint to the water. Paul Grover & Associates has designed a number of chlorine dioxide dosing systems which are used at dairy processing plants in Australia.
A mining company in West Australia required disinfection of potable water used for toilet flushing, safety showers and drinking water. Dioxide Pacific engaged Paul Grover & Associates to design a sodium hypochlorite dosing and control system.
Sodium hypochlorite is delivered to site in 1,000L IBC’s and placed into a bund in a shipping container plant room. Chemical is dosed accurately into potable water mains and controlled to 1ppm +/- 0.2 ppm residual. Project scope included design of the process, selection of equipment, 3D modeling of the plant, design of the electrical works and control system. The systems were delivered and are successfully operating today.
Paul Grover & Associates was engaged to design pH correction systems for two University semiconductor manufacturing plants. The trade waste from each site varies in pH from 4-10 and is controlled to pH 7-9 through accurately controlled acid and caustic. Project scope included design of the process, selection of equipment, 3D modeling of the plant, design of the electrical works and control system.
The systems were successfully installed and are successfully operating today.
ACOR Consultants engaged Paul Grover & Associates to provide a report comparing currently available ozone generators and associated ozone dosing equipment as options to replace existing ozone generators. The report provided a detailed technical, commercial and Life Cycle Costing over 15 years. Section 2 of the report compared ozone and UV technically and commercially. ACOR provided the report to SOPA and SOPA has actioned the recommendations.
Shell Refinery in Geelong owned a 10 year old hypochlorite generator utilized for biofouling control on their seawater cooling circuit. The generator had stopped and was in a state of disrepair. Paul Grover & Associates was engaged to investigate the Life Cycle Costs associated with upgrading the generator or replacing with new. The report was completed and Shell Refining has actioned the recommendations.