Hach Biotector B7000 TOC/TN Analyzer 協助德國煉油廠即時、準確、穩定連續監測高污泥煉油廢水之總有機碳與總氮濃度
TOC & TN in Refinery Wastewater
Representative sampling directly from the aeration tank
Representative sampling directly from the aeration tank
Background 應用背景介紹
Refining processes require large quantities of water – for steam generation, for heating or cooling, for cleaning and rinsing. In times of increasing water scarcity and rising costs, companies are endeavoring to treat as much water as possible and return it to the water cycle (see page 4).
Refining processes require large quantities of water – for steam generation, for heating or cooling, for cleaning and rinsing. In times of increasing water scarcity and rising costs, companies are endeavoring to treat as much water as possible and return it to the water cycle (see page 4).
Nevertheless, large quantities of wastewater are continuously produced, which can be contaminated with a variety of compounds.
Refinery wastewater contains substances from the blow-off of steam boilers or cooling towers, contaminated water from the various production processes such as desalination and desanding of crude oil, desulphurization or the distillation process.
Corrosion on heat exchangers can lead to traces of hydrocarbons; after all, in addition to fuels, other aromatics and aliphatic compounds are also extracted from crude oil in today‘s refineries.
It therefore makes sense not only to determine the TOC, i.e. the Total Organic Carbon, but also to monitor the Volatile Organic Carbon (VOC). This provides a deeper insight into the organic carbon load.
煉油廠製程高度依賴水資源，用途涵蓋鍋爐、冷卻、清洗與製程使用，產生大量高污染廢水。廢水來源複雜，包含脫鹽、脫砂、加氫脫硫、蒸餾、冷卻塔與鍋爐排放。廢水需同時監測 TOC（總有機碳）、TN（總氮）、VOC（揮發性有機碳）。
Problem 客戶面對的挑戰
Due to new regulations, a German refinery had to upgrade its in-house wastewater treatment plant with downstream denitrification using adapted bacteria. The increased efficiency of the TOC and TN (Total Nitrogen) degradation performance was to be continuously monitored and documented. The challenge was to take a qualified and representative sample from the aeration tank.
Due to new regulations, a German refinery had to upgrade its in-house wastewater treatment plant with downstream denitrification using adapted bacteria. The increased efficiency of the TOC and TN (Total Nitrogen) degradation performance was to be continuously monitored and documented. The challenge was to take a qualified and representative sample from the aeration tank.
德國某煉油廠因應新環保法規，需升級廠內廢水處理系統，並在後段使用經過改良的細菌進行反硝化程序。需持續、即時監測 TOC 與 TN 去除效能，並儲存所有數據紀錄。其挑戰在於直接從曝氣池取得足具代表性的水樣; 現場污泥與顆粒濃度高，傳統過濾加抽水系統維護量大、容易堵塞。
Solution 解決方案
The solution was found with a BioTector B7000 analyzer and associated Venturi sampling system. The Venturi sampler is a compressed air-driven vacuum pump system that can take samples over large distances and differences in height and prepare them in the right quantity. Both devices have been specially developed for industrial wastewater with a high particle content, as is typically found in the aerated zone of a refinery wastewater treatment plant.
The solution was found with a BioTector B7000 analyzer and associated Venturi sampling system. The Venturi sampler is a compressed air-driven vacuum pump system that can take samples over large distances and differences in height and prepare them in the right quantity. Both devices have been specially developed for industrial wastewater with a high particle content, as is typically found in the aerated zone of a refinery wastewater treatment plant.
導入 BioTector B7000 TOC/TN 線上分析儀，搭配專門為工業廢水設計的 Venturi 壓縮空氣驅動真空取樣系統，此系統可在遠距離和高度差的條件下取水樣，跳脫傳統模式，直接從曝氣槽即可抽取足具代表性的水樣進行分析。
Benefits 方案優勢
In combination with the high particle compatibility of the BioTector B7000 analyzer, which can process soft particles up to 2 mm, the Venturi sampler is the solution to provide representative wastewater samples in sufficient quantity for analysis around the clock.
The integrated self-cleaning function prevents cross-contamination or carry-over and enables multi-channel operation.
At the same time, it ensures low maintenance and very high availability.
In combination with the high particle compatibility of the BioTector B7000 analyzer, which can process soft particles up to 2 mm, the Venturi sampler is the solution to provide representative wastewater samples in sufficient quantity for analysis around the clock.
The integrated self-cleaning function prevents cross-contamination or carry-over and enables multi-channel operation.
At the same time, it ensures low maintenance and very high availability.
Sampling from the aeration tank 曝氣池取樣
The implementation of the denitrification process is intended to ensure compliance with environmental regulations. Sampling from the activated sludge tank is an important prerequisite for monitoring carbon and nitrogen degradation.
The implementation of the denitrification process is intended to ensure compliance with environmental regulations. Sampling from the activated sludge tank is an important prerequisite for monitoring carbon and nitrogen degradation.
As a rule, complex filter systems with pumps are installed to ensure the sample flow to the analyzer. However, the operation of these membrane filters is energy-intensive and requires a high level of maintenance.
The BioTector Venturi sampler, on the other hand, uses a stream of compressed air to create a vacuum to guide the sample contents to the analyzer. Both are installed next to each other to save space, with the analyzer supplying the sampler with power.
After each measurement cycle, the sample is removed from the Venturi sampler and the associated sampling lines and all components that come into contact with the sample are backwashed with a hot water microbubble mixture. The system is then dried with air and is ready for the next sampling.
The BioTector Venturi sampler, on the other hand, uses a stream of compressed air to create a vacuum to guide the sample contents to the analyzer. Both are installed next to each other to save space, with the analyzer supplying the sampler with power.
The operator opted for a multi-channel solution in order to monitor two measuring points at once: the flotation process and the aeration tank.
The BioTector B7000 analyzer determines the total nitrogen, TOC, TIC (Total Inorganic Carbon) and TC (Total Carbon). The volatile VOC is calculated automatically.
Hach BioTector B7000分析儀 可直接處理最高 2 mm 的軟性顆粒，加上Venturi取樣系統提供足夠具代表性的廢污水樣，適合全天候監測，數據穩定。整合的自動清潔功能設計則避免水樣殘留或交叉污染，並支援多通道取樣。同時，日常維護量很低而實用度極高。高度自動化與低維護設計，也大幅減輕操作與維護人員的日常工作負擔。操作人員選擇多通道解決方案來同時監測兩個測量點：浮除過程和曝氣池。BioTector B7000 分析儀可測定水中總氮、TOC、TIC（總無機碳）和 TC（總碳）。自動計算 VOC。
Summary 總結導入成效
Continuous monitoring of the TOC and total nitrogen load of the refinery wastewater with the BioTector B7000 TOC/TN analyzer and Venturi sampling system leads to reliable compliance with regulations. The workload of the plant personnel is noticeably reduced by the automation with low-maintenance devices.
Continuous monitoring of the TOC and total nitrogen load of the refinery wastewater with the BioTector B7000 TOC/TN analyzer and Venturi sampling system leads to reliable compliance with regulations. The workload of the plant personnel is noticeably reduced by the automation with low-maintenance devices.
使用 BioTector B7000 TOC/TN 分析儀 和Venturi創新取水樣系統成功連續監測煉油廢水的 TOC 和總氮負荷。曝氣槽取水樣過程中無活性污泥堵塞問題，量測資料連續且準確穩定。有效協助客戶符合法規放流水要求，自動化系統大幅降低人員維護工作量並提升運作效率。
Outlook 未來展望
The operator is evaluating further options for his system, e.g. probes and analyzers for monitoring dissolved and total nutrient parameters, sludge content and calculating sludge age, monitoring dissolved oxygen in the aeration tank, etc.
The operator is evaluating further options for his system, e.g. probes and analyzers for monitoring dissolved and total nutrient parameters, sludge content and calculating sludge age, monitoring dissolved oxygen in the aeration tank, etc.
With the Hach® RTC-controlled automatic dosing system for nutrient adjustment, further optimization of the system is possible. Last but not least, thanks to the wide range of service plans, the overall workload and responsibility of the maintenance team and operators can be further reduced.
客戶評估未來導入更多水質與製程參數監控 : 例如溶解營養物和總營養物參數、污泥濃度和污泥齡，和曝氣池中的溶氧等。搭配Hach RTC 自動控制加藥系統優化營養鹽調整。
客戶評估未來導入更多水質與製程參數監控 : 例如溶解營養物和總營養物參數、污泥濃度和污泥齡，和曝氣池中的溶氧等。搭配Hach RTC 自動控制加藥系統優化營養鹽調整。
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