冷卻水塔水測試 Cooling Tower Water Testing
冷卻水塔是一個散熱裝置，用於消除釋放到大氣中的廢熱空氣。冷卻過程會讓空氣中的污染物，有機物和塵粒跌進冷卻水中，加上水中的污染物，漸漸形成固體沈積物。此沈積物通常是細菌的溫藏。
由於水塔內的環境溫暖潮濕，不妥善處理水塔水會有利於退伍軍人病菌滋長。由於退伍軍人病可引致死亡，一旦病菌爆發及擴散，對人類健康有嚴重的威脅。因此，定期測試水塔水的水質有助防止病菌的傳播。
在香港，機電工程署（EMSD）發佈的《水冷式空調系統實務守則》建議每三個月檢測一次退伍軍人菌，每一個月檢測一次異養菌群總數。此外，建議監測其他參數，以全面了解水質狀況。下表提供了參考性的淡水水質標準。
為了確保測試結果的精準性，水質測試應由HOKLAS認可的實驗室進行。環境化驗有限公司為HOKLAS認可的實驗室（編號128），而上文提及的測試均已獲得HOKLAS之認可。詳情請參閱由香港認可處 (HKAS) 公佈的我們的認可範圍。
Cooling tower is a heat removal device used to eliminate waste heat of air released to atmosphere. This process allows airborne contaminants, organic matters and particles to become deposited into the cooling water. This, combined with the contaminants in the feed water, creates an environment for microorganism growth, solid deposits and scaling. Improper treated cooling tower water could be an amplifier of biological hazardous agent. The warm and moist environment of a cooling tower favors the growth of Legionella bacteria which causes the outbreak of the deathly Legionnaires' disease. Thus, cooling tower water quality must be monitored in a regular basis to prevent spreading of diseases to users.
In Hong Kong, Code of Practice for Water-cooled Air Conditioning Systems, published by the Electrical and Mechanical Services Department (EMSD), HKSAR Government, recommends to test for legionella and heterotrophic colony count at least every three months and every one month, respectively. Monitoring of other parameters is recommended to provide a full picture on the water quality. Indicative fresh water quality criteria are provided as table below.
To ensure the accuracy of the test results, testing should be carried out by the laboratories accredited by the Hong Kong Laboratory Accreditation Scheme (HOKLAS). Enviro Labs Ltd. (ELL) is registered as a HOKLAS accredited laboratory (HOKLAS 128) in Environmental Testing and our company holds HOKLAS accreditation for ALL the tests listed as above. For details, please refer to our scope of accreditation published by HKAS.
冷却水塔是一个散热装置，用于消除释放到大气中的废热空气。冷却过程会让空气中的污染物，有机物和尘粒跌进冷却水中，加上水中的污染物，渐渐形成固体沉积物。此沉积物通常是细菌的温藏。
由于水塔内的环境温暖潮湿，不妥善处理水塔水会有利于退伍军人病菌滋长。由于退伍军人病可引致死亡，一旦病菌爆发及扩散，对人类健康有严重的威胁。因此，定期测试水塔水的水质有助防止病菌的传播。
在香港，机电工程署（EMSD）发布的《水冷式空调系统实务守则》建议每三个月检测一次退伍军人菌，每一个月检测一次异养菌群总数。此外，建议监测其他参数，以全面了解水质状况。上表提供了参考性的淡水水质标准。
为了确保测试结果的精准性，水质测试应由HOKLAS认可的实验室进行。环境化验有限公司为HOKLAS认可的实验室（编号128），而上文提及的测试均已获得HOKLAS之认可。详情请参阅由香港认可处 (HKAS) 公布的我们的认可范围。