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1. Design and installation of an industrial wastewater treatment system for a bread and food processing factory
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 Design and installation of an industrial wastewater treatment system |
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Having established new production lines for new products, the client found its existing wastewater treatment system no longer adequate for the required discharge standards. HKPC, with its experience and track record in the design and installation of waste control systems, was commissioned to design, install and fine-tune a cost-effective system for the treatment of wastewater. |
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August 2001 to September 2004 |
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The suspended solids were first removed from the wastewater through a chemical treatment system and then followed by a two-phase treatment through a membrane bioreactor, including a biological aeration tank and a rotating biological contactor. It is a highly energy efficient biological treatment system, with an automatic monitoring system for dissolved oxygen. The effluents also comply with the stringent discharge standards of the Hong Kong SAR Government. |
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| Productivity Achievements |
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The system not only solved the wastewater problem of the client, but also helped the company save water since the discharged water could be used to flush toilets. |
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2. Wastewater Treatment System for Construction Sites - HKPC-AquaSed
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 Wastewater Treatment System for Construction Sites - HKPC-AquaSed |
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In a construction site, wastewater is discharged as a result of several types of construction activities, such as vehicle cleaning, ground water collection, site spraying, rainwater collection, etc. This kind of wastewater usually carries a large amount of sand, grit, mud and other suspended solids particles. Since the wastewater is discharged to the storm drain, it can cause blockage of the drainage pipeworks and potential pollution to the water receiving body if the wastewater is not properly treated. |
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Conventional sedimentation technology adopted in most construction sites cannot efficiently filter suspended solids. The effluent of construction works is always silt-clay laden and cannot be separated effectively by sedimentation. To tackle this problem, HKPC has developed a solution based on the principle of chemical coagulation, achieving a removal efficiency for suspended solids of over 90%. This technology is incorporated in the HKPC-AquaSed. |
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| Productivity Achievements |
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The system not only helps the construction industry solve the wastewater treatment problem, but also helps clients save significantly on water, with monthly savings of up to HK$100,000, as the treated water can be recycled. |
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