Hach NH6000sc氨氮監測儀和FX620水樣過濾模組協助德國最大的污水處理廠穩定監測最終端排放水氨氮濃度
Hamburg’s wastewater treatment plant, Köhlbrandhöft/Dradenau, is the largest in Germany, treating wastewater for 2.8 million population equivalents. The site is split into two facilities: Köhlbrandhöft handles primary and sludge treatment, while Dradenau is dedicated to biological and tertiary treatment before final discharge.
德國漢堡市的科爾布蘭德霍夫特 / 德拉德瑙污水處理廠是德國最大的污水處理廠，處理相當於280萬人口的污水量。此污水處理廠分為兩個部分：科爾布蘭德霍夫特廠負責初級處理和污泥處理，德拉德瑙廠則負責最終端排放前的生物處理和三級處理。
Effluent quality monitoring is critical for regulatory compliance and environmental protection, especially under the revised Urban WasteWater Treatment Directive (UWWTD). However, reliable online ammonium measurement at key process points like final effluent has long been a challenge at that plant.
排放水水質的監測對於達到法規標準和環境保護極為關鍵，特別是在修訂後的(德國)《城市污水處理指令》（UWWTD）下。不過，在此廠，對於關鍵處理過程點，例如最終排放水，進行可靠的線上氨氮監測一直是個挑戰。
Over the years, several ammonium measurement technologies have been tested. Each system faced limitations 過去多年，測試過多種氨氮監測技術。惟每種系統都有其限制 :
- Excessive biofilm formation (see picture 2 for a typical example of mucus/slime buildup on the filter, which previously required intensive manual cleaning) 生物膜過度形成（圖2顯示過濾器上黏液/污泥積聚，以往需要大量的手動清洗）
- Frequent clogging 頻繁的阻塞
- Inconsistent sample quality 水樣品質不穩定
- High manual cleaning frequency and long intervention times with competing ion-selective electrode (ISE) technologies, typically requiring 2 manual cleanings per week and weekly matrix calibration, consuming around 2 hours of operator time weekly 相較於其他離子選擇電極 (ISE) 技術，手動清洗的頻率高、干預時間長，通常每週需要兩次手動清洗和每週一次校正，每週約耗費操作人員2 小時的時間
These issues made continuous monitoring impractical and undermined operator confidence in the data, particularly at the final effluent, where peace of mind is essential. A robust, low-maintenance solution was actively being sought to overcome these limitations and enable reliable online monitoring.
Requirements 需求
The plant needed a solution that could 此污水處理廠需要一個能夠滿足以下條件的技術方案 :
The plant needed a solution that could 此污水處理廠需要一個能夠滿足以下條件的技術方案 :
- Deliver stable, low-maintenance filtration for representative sampling 針對具代表性的水樣，提供穩定、低維護工作量的過濾系統
- Provide accurate ammonium measurements even at low concentrations 精確監測包括低濃度的氨氮含量
- Enable compliance monitoring at the final discharge 達到最終排放水標準的合規監測
- Support process control in the biological stage 支援生物處理階段的過程控制
- Explore new monitoring possibilities at the primary outlet, where no measurements had previously been feasible 同時探索適合主排放水口的新技術監測方案
Solution
The deployment of the FX620 filtration module (picture 3) paired with the NH6000sc Ammonia Analyzer (picture 4) marked a turning point.
結合FX620 過濾模組（圖 3）與 NH6000sc 氨氮監測儀（圖 4）的組合帶來了轉變
NH6000sc 氨氮線上監測儀 delivers:
- Lab-comparable ammonium readings 可與實驗室比對的氨氮讀數
- Minimal manual intervention 大幅減少人力手動干預
- High accuracy, even at low concentrations 即使針對低濃度監測也能維持高準確度
- Automatic cleaning of the whole sampling line at a customized frequency 可自訂頻率自動清潔整個採樣管路
FX620 水樣過濾模組 features:
- Integrated pump and compressor in the NH6000sc cabinet for easy installation 於 NH6000sc 儀器內整合幫浦和壓縮機，安裝簡單
- Lightweight filter design (2.2–3.5 kg) with a single membrane 輕巧的單膜過濾設計
- Rotating filter support for enhanced cleaning 可旋轉的過濾模組支持強化清洗效果
- Powerful air bubbling system 強大的空氣氣泡系統
- Extended maintenance intervals 延長的維護週期
Results
Three test deployments were conducted 執行了三項測試 :
Three test deployments were conducted 執行了三項測試 :
Test 1 in final effluent 於最終排放水階段
FX620 sample filtration system maintained 90% flow rate (1100 ml/h) over 4 weeks with no mechanical cleaning, only automatic cleaning of the sampling line every 48 hours. As illustrated in picture 5, the membrane remained remarkably clean, demonstrating filtration effectiveness. Operators reported unprecedented stability and expressed strong confidence in the compliance data provided by NH6000sc ammonia analyzer.
FX620 sample filtration system maintained 90% flow rate (1100 ml/h) over 4 weeks with no mechanical cleaning, only automatic cleaning of the sampling line every 48 hours. As illustrated in picture 5, the membrane remained remarkably clean, demonstrating filtration effectiveness. Operators reported unprecedented stability and expressed strong confidence in the compliance data provided by NH6000sc ammonia analyzer.
FX620過濾模組在 4 週內保持 90% 的流速 (1100 ml/h)，無需任何機械清洗，僅每 48 小時對採樣管路進行自動清洗。如圖 5 所示，膜維持著明顯的清潔度，證明其過濾的效率。操作人員回報前所未有的穩定度，並對 NH6000sc 氨氮監測儀提供的合規數據表示高度信賴。
Test 2 at biological treatment step 於生物處理階段
FX620 operated continuously for 12 weeks without any manual cleaning (membranes were not cleaned between test 1 and test 2 – see picture 6). Paired with NH6000sc, the system delivered accurate and stable data for process control, with zero cleaning effort required throughout the test period.
FX620 operated continuously for 12 weeks without any manual cleaning (membranes were not cleaned between test 1 and test 2 – see picture 6). Paired with NH6000sc, the system delivered accurate and stable data for process control, with zero cleaning effort required throughout the test period.
FX620 過濾模組連續運行 12 週，無需任何人工清洗（測試 1 和測試 2 之間未清洗的膜－見圖 6）。與 NH6000sc 氨氮監測儀搭配使用，提供了準確和穩定的過程控制數據，並且在整個測試期間無需任何清洗工作。
Test 3 in primary treatment effluent 於初級處理排放水階段
Historically considered unsuitable for online measurement due to poor sample quality and heavy fouling, especially linked to metal salt dosing. FX620 proved otherwise: by reducing the automatic cleaning interval from 48h to 6h, deposits inside the analyzer were effectively minimized, maintaining stable performance and opening new perspectives for upstream monitoring.
Historically considered unsuitable for online measurement due to poor sample quality and heavy fouling, especially linked to metal salt dosing. FX620 proved otherwise: by reducing the automatic cleaning interval from 48h to 6h, deposits inside the analyzer were effectively minimized, maintaining stable performance and opening new perspectives for upstream monitoring.
由於水樣品質不佳和嚴重的結垢問題（特別是在添加金屬鹽的情況下），過去一直認為該排放水不適合線上監測。但 FX620 水樣過濾模組 證明並非如此：透過將自動清洗間隔從 48 小時縮短至 6 小時，有效減少了氨氮監測儀內部的沉積物，保持穩定的效能，進而為上游的監測開闢了新的前景。
圖5：在最終排放段，FX620膜在未進行機械清洗的情況下運行4週後的狀況
Thanks to its self-cleaning and automatic calibration every 24 or 48 hours, the team rapidly gained confidence in the quality of the measurement results.
圖6：在最終排放段，FX620膜在未進行機械清洗的情況下運行16週後的狀況
Benefits 獲益
- Effluent monitoring is finally possible with low constraints on maintenance and high accuracy: a long-standing goal now achieved 低維護量、高準確度的終端排放水監測的長期目標如今終於達成
- Maintenance time drastically reduced, with no manual cleaning for weeks 維護時間大幅縮短，數週內無需人力手動清潔
- Operator satisfaction is “peace of mind” with reliable data 穩定可靠的數據讓操作人員“安心無憂”
- New monitoring strategies are now possible, even at previously inaccessible measurement points 即使在以前無法觸及的測量點，現在也可能採用新的監測策略
According to Tony Fischer, Process Engineer at HAMBURG WASSER, the advantages of the NH6000sc became clear very quickly.
Thanks to its self-cleaning and automatic calibration every 24 or 48 hours, the team rapidly gained confidence in the quality of the measurement results.
根據德國漢堡水務公司 (HAMBURG WASSER) 的程序工程師 Tony Fischer 表示，NH6000sc 氨氮監測儀的優勢很快就顯現出來。
After validating the analyzer with a few lab comparisons, they began using its readings as a reliable reference for process control.
由於其每 24 或 48 小時自動清潔和校正的功能，團隊很快就對測量結果的品質充滿信心。幾次透過實驗室比對驗證監測儀數據後，他們開始將其讀數做為過程控制的可靠參考值。
Conclusion 結論
The FX620 Sample Filtration System + NH6000sc ammonia analyzer combination has proven to be a game-changer for Hamburg’s WWTP. It enables reliable, low-maintenance ammonium monitoring across the entire process chain from primary outlet to final discharge.
The FX620 Sample Filtration System + NH6000sc ammonia analyzer combination has proven to be a game-changer for Hamburg’s WWTP. It enables reliable, low-maintenance ammonium monitoring across the entire process chain from primary outlet to final discharge.
FX620 水樣過濾模組 + NH6000sc 氨氮監測儀的組合方案已證明對德國漢堡污水處理廠而言是一項變革性的技術。它能夠對從初級排放口到最終排放口的整個處理過程鏈進行精確可靠且低維護工作量的線上氨氮監測。
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