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    鎮海口岸船舶二次供水水質狀況調查
    關鍵字:狀況,調查,船舶,IJ,KL,GH,EF,AB,CD,MN, 發布時間:2011-08-19

    逝婆亟墮醫堂呈Q!Q生箜壟鲞筮2塑圣蜮血g塑!!!里!i翌叢!魚迤塑:墨業:2Q!魚:!塵絲:叢壘2 ‘57- 鎮海口岸船舶二次供水水質狀況調查 袁軍1’2 中圖分類號:R123.1文獻標識碼:B文章編號:1007-0931(2010)09—0057一02 船舶二次供水配備是船舶和港口基礎設施之 一…,船載二次供水設施既有一般二次供水設施 特點,又具有可在海上移動補給特性,須設置相應 的動力系統,所以船舶二次供水設施是多種系統的 集合體。若二次供水設施不規范,會發生二次供水 污染事件舊1,為了解船舶二次供水水質狀況,2008 —2009年我們對鎮海口岸船舶二次供水進行了調 查。 對象與方法 1 對象海上船舶各類儲水艙提供的二次供水作 為本次調查對象,研究船舶二次供水衛生狀況。 2方法對鎮海口岸船舶二次供水儲水艙類型、 供水方式、管理人員衛生狀況、水質進行調查,以 同期岸基碼頭末梢水質作為對照。采樣及檢測按 《生活飲用水標準檢驗法》(GB5750—85)進行, 以《生活飲用水衛生標準》(2001)進行分析評 價;每月2次對在港船舶二次供水水質進行渾濁 度、余氯、鐵、細菌總數、總大腸茵群等項目監 測;同時為解決鎮海口岸二次供水設施種類單一, 通過文獻檢索篩選出同類具有可比性的資料研究, 對數據進行分析比較。 3數據分析數據使用Excel進行記錄,并用 SPSS13.0對水質監測項目合格率進行r分析。 結果 1 儲水艙類型、供水方式和管理人員衛生健康狀 況本次調套鎮海口岸船舶二次供水儲水艙18個, 主要為鐵制儲水艙,94.4%(17/18)為防腐蝕, 17.65%(3/17)使用防腐涂料;82.35%(14/17) 敷設水泥內壁材料。所有儲水艙均無消毒藥物投放 設施和余氯監測設備;能做到加蓋密封,采娟加壓 供水;有專人專管,管理人員均持有合格健康證 明;能做到及時清洗消毒占83.33%(15/18)。 2 口岸水質監測共采樣檢測鎮海口岸船舶二次 供水水質36份,全部檢測指標合格僅為14份;渾 濁度、鐵合格率為61.“%;余氯合格率僅為 38.89%;2份出現油污。同期檢測岸基碼頭末梢 水45份,僅有1份樣品渾濁度超標,合格率達 97.78%;鎮海口岸船舶二次供水水質明顯差于同 期岸基碼頭末梢水,見表l。 表1鎮海口岸船舶二次供水與岸基碼頭水質監測結果 3文獻資料分析通過對同類文獻檢索資料分 析m6|,發現各種船舶二次供水水質均比對照組 作者單位:1.寧波出入境檢驗檢疫局。浙江 寧波 315010;2.浙江大學醫學院 差。各項監測指標僅砷合格率與對照組達到 100.00%;余氯合格率最低,僅為5.93%;鐵合 格率為78.01%;渾濁度、細菌總數、總大腸茵 群、色度合格率均低于對照組。 萬方數據 換頁 ?58。 逝塹塑陵匡堂至Q!Q生筮絲鲞箜2翅圣幽i!籃£堡!!趔堡叢曼塵!i塑。墨望:呈Q!Q:!!!絲:盟Q:2 表2文獻資料同類船舶二次供水水質監測結果 討論 本次研究中發現船冉fl--次供水余氯合格率低, 細菌總數、總大腸菌群超標。主要是船舶二次供水 地點主要在海上,需要將城市供水系統中的水先存 儲在儲水艙中,水儲存時間從1天至1月不等,在 這個過程中飲用水余氯含量逐漸減少,又無投藥設 施及時補充消毒藥物,同時船舶特殊復雜的管道系 統易形成“潴留水”,致使余氯合格率降低,細菌 滋生;建議在船舶二次供水設施中增加消毒劑投放 設施和余氯檢查設備,對存儲飲用水余氯含量進行 實時監測,根據監測結果增加消毒劑投放,遏制微 生物生長,使其符合生活飲用水標準。 船舶二次供水水質鐵含量合格率僅有 78.ol%。主要由于氯氣腐蝕敷設內壁材料的鐵制 儲水艙池內壁,可出現粉化、脫落、鐵質起泡,向 水中析出金屬有害物質一1;同時會使飲用水渾濁 度和色度超標。盡量選用鋼制儲水艙,淘汰單純的 鐵制儲水艙,對鐵制儲水艙內壁敷料在用材、設 計、施工工藝、重金屬含量滲出等方面逐項審查, 嚴格落實《二次供水設施規范》標準要求,確保 工程衛生質量。 本次調查發現部分樣品存在油污污染,由于船 舶二次供水設施為了保持其水面活動能力,配備各 種動力系統和相關輔助系統,這些系統運行需要使 用大量不同種類的有機物,如柴油、重油、潤滑 油、防腐漆等,在供水船狹小的空間中各種物品的 交互使用,如果人員操作不當或各個系統封閉管道 發生泄漏都將對水體造成污染。 資料顯示未及時進行供水設施衛生維護可能導 致污染事故¨J。船舶二次供水能做到定期清洗消 毒的比例為83.3%,存在一定安全衛生隱患,應 對供水流程進行定崗定責,由專人負責水質的管理 及其設施的維護保養,規范、落實儲水艙的清洗消 毒和衛生管理制度,新設備、新管網使用前或者舊 設備、舊管網修復后,必需嚴格清洗、消毒;建立 有專業知識的清洗隊伍,保證儲水艙的清洗質量, 健全船舶二次供水設施維護和管理體制,口岸監管 部I-]N強水質監測和船舶二次供水設施衛生維護的 檢查,督促改善水質,保障船員飲水安全。 參考文獻 [1]陳賓康,裘學峰.供水船的最優化設計方法[J].船舶工 程,1994,17(2):12一16. [2]湛慶全.一起生活污水污染二次供水引起的水源性疾病 [J].廣東衛生防疫,2000,26(1):70. [3]曹清松,黃靜華,潘其保.1998—2000年青島市海上作業船 舶供水衛生質量分析[J].預防醫學文獻信息,2002,8 (2):250. [4]于洋,許力波,馮梅梅.海上石油平臺儲水箱內水質的細菌 學調查[J].環境與健康雜志.2006.23(6):517. [5] 高思維,熊國歡。吳青等.馬尾17"1岸供水點及出入境船舶生 活飲用水水質現狀調查分析[J].口岸衛生控制,2007, 12(1):40一43. [6]孫欽敏。房文建,高科貴.煙臺市船舶飲用水衛生狀況調查 [J].職業與健康,2005,21(4):591—592. [7]曾保栓,李水忠,楊杰.二次供水污染因素調查分析和防制 [J].職業與健康,2002,18(7):89-90. [8] 金淑琴.魏向東,王本進.北京市生活飲用水污染原因分析 及防治對策[J].中國自然醫學雜志,2005,7(7):257— 258. (收稿r:t期:2010—03—30) 萬方數據 換頁

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