Naoyuki Kishimoto; Mari Hatanaka; Yuichi Kinoshita
Abstract
The fat, oil, and grease (FOG) deposition onto pipes is a serious problem in wastewater management, especially in restaurants that have a limited space and no expert for water treatment. In this research effects of ozonized water treatment on controlling FOG deposition were discussed using lard as a ...
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The fat, oil, and grease (FOG) deposition onto pipes is a serious problem in wastewater management, especially in restaurants that have a limited space and no expert for water treatment. In this research effects of ozonized water treatment on controlling FOG deposition were discussed using lard as a model FOG deposit. Since ozonized water can be produced from tap water with an electrolysis ozonized water generator, ozonized water treatment has a potential to be a compact and easily operable process. A series of batch tests with 24-hours contact time revealed that ozonized water successfully prevented liquid lard from solidifying and enhanced the elution of solid lard. Both functions were proportionally intensified with the increase in ozone consumption. An intermittent ozonized-water flushing with 200-seconds contact time using a model drainpipe, whose inner wall was covered with solid lard, was also effective in removing lard from the drainpipe with the linear relationship between the lard elution and the ozone consumption. The observed ratio of the cumulative mass of eluted lard to the cumulative ozone consumption was 1.15±0.04 mgC/mgO3. Thus, the intermittent flushing of drainpipe with ozonized water was inferred to be an effective option for controlling FOG deposition.
Godfred Owusu-Boateng; Victoria Adjei
Volume 1, Issue 1 , March 2014, , Pages 28-34
Abstract
The problems of shortages and quality deterioration of water, have led to an increased interest in the reuse of treated grey water in many parts of the world. This study examined the suitability of locally available materials (beach sand, oyster shells, and charcoal) to treat grey water samples collected ...
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The problems of shortages and quality deterioration of water, have led to an increased interest in the reuse of treated grey water in many parts of the world. This study examined the suitability of locally available materials (beach sand, oyster shells, and charcoal) to treat grey water samples collected weekly from three halls of residence (Unity Hall, Africa Hall, and Independence Hall) on Kwame Nkrumah University of Science and Technology (KNUST) campus for irrigation. Beach sand, oyster shells, and charcoal were employed in the construction of three vertical flow-through filter systems, each consisting of PVC pipes of height 100 cm and internal diameter 5.08 cm. The grey water samples were filtered and the levels of physicochemical parameters (pH, conductivity, TDS and salinity), nutrient and microbial counts determined over a three-week period. Results indicate that the measured physico-chemical parameters treated grey water were within the permissible limits for irrigation water. Also filtration process is effective in reducing phosphate, the total and faecal coliform levels in grey water from the halls of residence. These observations suggest that treated grey water from KNUST campus would support production when used as irrigation water.
