Laboratory tests on heat treatment of ballast water using engine waste heat
| Autor: | Badruzzaman bin Ahmad, Nasrudin Ismail, Hing Lee Siang, Kho King Koh, Mohd Arif bin Ismail, Omar Yaakob, Rajoo Balaji, W. B. Wan Nik, Faizul Amri Adnan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Ballast Hot Temperature Wastewater 010501 environmental sciences 01 natural sciences Zooplankton Water Purification Waste heat recovery unit Heat recovery ventilation Waste heat Phytoplankton Animals Environmental Chemistry Waste Management and Disposal Ships 0105 earth and related environmental sciences Water Science and Technology Waste management 010604 marine biology & hydrobiology fungi Environmental engineering Water General Medicine Plankton Coolant Environmental science |
| Zdroj: | Environmental Technology. 39:1102-1114 |
| ISSN: | 1479-487X 0959-3330 |
| Popis: | Waste heat recovery from shipboard machineries could be a potential source for heat treatment of ballast water. Similar to a shipboard schematic arrangement, a laboratory-scale engine-heat exchanger set-up harvesting waste heat from jacket water and exhaust gases was erected to test the level of species' mortalities. Mortalities were also assessed under experimental conditions for cultured and natural plankton communities at laboratory level. Effect of pump impellers on species' mortalities were also tested. Exposures between 60°C and 70°C for 60 sec resulted in 80-100% mortalities. Mortalities due to pump impeller effects were observed in the range of 70-100% for zooplankton. On the laboratory-scale arrangement,95% mortalities of phytoplankton, zooplankton and bacteria were recorded. It was demonstrated that the temperature of tropical sea waters used as secondary coolant can be raised to cause species' mortalities, employing engine exhaust gases. The results also indicated that pump impeller effects will enhance species' mortalities. The limitations of the shipboard application of this method would be the large ballast volumes, flow rates and time for treatment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|