Maraming EPC ang bumibili ng analyzer ng ammonia at inaakalang ‘tapos na’ ang nitrogen. Ngunit ang QCVN 40:2025 ay naglilimita sa Total Nitrogen sa ≤20/40/60 mg/L ayon sa Column A/B/C — lahat ng nitrogen species, hindi lang NH4+. Narito kung ano talagang sinusukat ng T-N, kung paano ito nagkakaiba sa ammonia, at kung paano tukuyin ang monitor na karapat-dapat sa espasyo sa panel.
Ang T-N = organic nitrogen + ammonium (NH4+) + nitrite (NO2−) + nitrate (NO3−). Ang standard ay naglilimita sa kabuuan, dahil lahat ay nagpapakain sa eutrophication. Ang ammonia-only na pagbabasa ay maling nagpapababa sa load na idinadagdag ng iyong discharge sa receiving water.
Sa ilalim ng QCVN 40:2025/BTNMT, ang Total Nitrogen (T-N) ay limitado sa ≤20/40/60 mg/L ayon sa receiving-water Column A/B/C — walang flow-based split. Ang Total Phosphorus (T-P) ay hiniwalay na limitado sa ≤4/6/10 mg/L para sa mga ilog (mas mahigpit para sa mga lawa), dahil ang nitrogen at phosphorus ay magkasama nagpapadrive ng algal blooms.
| Parameter | Column A | Column B | Column C |
|---|---|---|---|
| Total Nitrogen (T-N) | ≤ 20 | ≤ 40 | ≤ 60 |
| Total Phosphorus (T-P, rivers) | ≤ 4 | ≤ 6 | ≤ 10 |
Ang tatlong ito ay nag-uulat ng total nitrogen, ngunit magkaiba sa digestion, interference, at kung saan angkop. Ihambing ang pamamaraan sa iyong matrix, hindi sa presyo sa katalogo.
| Pamamaraan | Reagent na kailangan / interference | Pinakamainam para sa |
|---|---|---|
| Persulfate digestion + UV (colorimetric) | Alkaline persulfate oxidizes all N to nitrate, then UV colorimetry; needs reagent and digest time | Karamihan sa domestik at industriyal na wastewater |
| Ion chromatography (IC) | Separates NH4+/NO2-/NO3- directly; low reagent; needs sample prep; great for speciation | Plants needing N species split |
| Direct UV photometry / probe | Reagent-light, fast, inline; correlated by calibration; colour and turbidity need compensation | Clean, consistent matrix or screening |
Ang isang planta ay pumasa sa ammonia ngunit nalalabag pa rin sa T-N, dahil ang organic N at nitrate ay sumasama. Sukatin ang monitor sa total N, hindi lang ang ammonium fraction na binabantayan ng mga operator. Sa maraming food, aquaculture at agro planta, ang nitrate/organic share ang mas malaking compliance risk.
Ang analyzer ng nitrogen ay hindi sumusukat ng isang species — sinusukat nito ang kabuuang load na nagpapakain sa algal blooms, at ang iyong column ang tumutukoy sa cap. Tukuyin ang pamamaraan batay sa iyong tunay na tubig at duty cycle, pagkatapos bumili ng factory-grade unit sa sariling presyo ng pabrika.
Ang aming Water Analyzer Selection Guide ay naglalakad sa pagpapares ng measurement principle, range at site condition sa buong COD, ammonia, pH, DO, turbidity at TSS — at kami ay namimili direkta mula sa audited Chinese manufacturers, ipinapasa ang factory-gate price nang walang markup.
Ipadala sa amin ang medium, normal at surge T-N (at T-P), at mga kondisyon sa site. Ipapares namin ang measurement method at hihingi ng ex-works price mula sa audited manufacturer.
QCVN 40:2025/BTNMT caps Total Nitrogen (T-N) at ≤20/40/60 mg/L by receiving-water Column A/B/C, with no discharge-flow split.QCVN 40:2025/BTNMT 按受纳水体 A/B/C 栏对总氮（T-N）限值为 ≤20/40/60 mg/L，不按排放流量分档。QCVN 40:2025/BTNMT membatasi Total Nitrogen (T-N) pada ≤20/40/60 mg/L menurut Kolom A/B/C air penerima, tanpa pemisahan aliran pembuangan.QCVN 40:2025/BTNMT giới hạn Tổng nitơ (T-N) ở mức ≤20/40/60 mg/L theo Cột A/B/C của nước tiếp nhận, không phân chia theo lưu lượng xả.QCVN 40:2025/BTNMT จำกัดไนโตรเจนทั้งหมด (T-N) ที่ ≤20/40/60 mg/L ตามคอลัมน์ A/B/C ของแหล่งน้ำรับน้ำทิ้ง โดยไม่มีการแบ่งตามอัตราการไหลQCVN 40:2025/BTNMT mengehadkan Jumlah Nitrogen (T-N) pada ≤20/40/60 mg/L mengikut Lajur A/B/C air penerima, tanpa pemisahan aliran pelepasan.Ang QCVN 40:2025/BTNMT ay nagtatakda ng Total Nitrogen (T-N) sa ≤20/40/60 mg/L ayon sa Column A/B/C ng tubig na tumatanggap, nang walang paghahati sa daloy ng pagdiskarga.
No. T-N is the sum of organic N, ammonium (NH4+), nitrite and nitrate. Ammonia (NH4+-N) is one fraction; a plant can pass ammonia yet still breach T-N.不是。T-N 是有机氮、铵（NH4+）、亚硝酸盐和硝酸盐之和。氨氮（NH4+-N）只是其中一部分；工厂氨氮达标仍可能突破总氮。Tidak. T-N adalah jumlah N organik, amonium (NH4+), nitrit, dan nitrat. Amonia (NH4+-N) adalah satu fraksi; pabrik bisa lulus amonia namun tetap melanggar T-N.Không. T-N là tổng của N hữu cơ, amoni (NH4+), nitrit và nitrat. Amonia (NH4+-N) chỉ là một phần; nhà máy có thể đạt amonia nhưng vẫn vi phạm T-N.ไม่ T-N คือผลรวมของ N อินทรีย์ อำมอนีม (NH4+) ไนไทรต์ และไนเตรต อำมอนีม (NH4+-N) เป็นเพียงเศษส่วนเดียว โรงงานอาจผ่านอำมอนีมแต่ยังละเมิด T-N ได้Tidak. T-N ialah jumlah N organik, ammonium (NH4+), nitrit dan nitrat. Ammonia (NH4+-N) ialah satu pecahan; loji boleh lulus ammonia namun masih melanggar T-N.Hindi. Ang T-N ay ang kabuuan ng organic N, ammonium (NH4+), nitrite, at nitrate. Ang ammonia (NH4+-N) ay isang bahagi lamang; ang isang planta ay maaaring pumasa sa ammonia ngunit lumabag pa rin sa T-N.
All nitrogen species fuel eutrophication. Capping only ammonia understates the nutrient load a discharge adds to the receiving water.所有氮形态都会加剧富营养化。只限氨会低估排放对受纳水体的营养盐负荷。Semua spesies nitrogen memicu eutrofikasi. Membatasi hanya ammonia meremehkan beban nutrisi yang ditambahkan pembuangan ke air penerima.Mọi dạng nitơ đều thúc đẩy phú dưỡng hóa. Chỉ giới hạn amonia sẽ đánh giá thấp tải lượng dinh dưỡng mà dòng thải thêm vào nước tiếp nhận.สปีชีส์ไนโตรเจนทั้งหมดกระตุ้นการเกิดยูโทรฟิเคชัน การจำกัดเพียงอำมอนีมจะประเมินภาระสารอาหารที่การระบายเพิ่มให้แหล่งน้ำรับน้ำทิ้งต่ำกว่าความเป็นจริงSemua spesies nitrogen mencetuskan eutrofikasi. Mengehadkan hanya ammonia meremehkan beban nutrien yang ditambah pelepasan ke air penerima.Lahat ng species ng nitrogen ay nagpapakain ng eutrophication. Ang paglimita lang sa ammonia ay nag-aunderestimate sa nutrient load na idinadagdag ng pagdiskarga sa tubig na tumatanggap.
Common methods are alkaline persulfate digestion with UV colorimetry (lab/online), ion chromatography (speciation), and direct UV photometry (reagent-light, inline).常用方法有过硫酸盐碱性消解 + 紫外比色（实验室/在线）、离子色谱（形态分析）和直接紫外光度法（试剂少、可在线）。Metode umum adalah digesti persulfat alkalin dengan kolorimetri UV (lab/online), kromatografi ion (speciasi), dan fotometri UV langsung (sedikit reagen, inline).Các phương pháp phổ biến là phân hủy persulfat kiềm bằng quang kế UV (lab/online), sắc ký ion (định dạng), và quang phổ UV trực tiếp (ít thuốc thử, inline).วิธีที่นิยมคือการย่อยเปอร์ซัลเฟตด่างร่วมกับค่าสีUV (ห้องปฏิบัติการ/ออนไลน์) โครมาโทกราฟีไอออน (การแยกสปีชีส์) และฟลูออริมิเตอร์ UV โดยตรง (ใช้สารเคมีน้อย แบบออนไลน์)Kaedah biasa ialah pencernaan persulfat alkali dengan kolorimetri UV (makmal/online), kromatografi ion (pemeringkatan spesies), dan fotometri UV terus (sedikit reagen, inline).Ang mga karaniwang paraan ay alkaline persulfate digestion kasama ang UV colorimetry (lab/online), ion chromatography (speciation), at direct UV photometry (lightweight na reagent, inline).
Yes. T-P is capped separately at ≤4/6/10 mg/L for rivers (tighter ≤2/2.5/3 mg/L for lakes). Nitrogen and phosphorus are capped as a pair because both drive algal blooms.适用。T-P 单独限值为河流 ≤4/6/10 mg/L（湖泊更严 ≤2/2.5/3 mg/L）。氮和磷成对限值，因为二者都引发水华。Ya. T-P dibatasi terpisah pada ≤4/6/10 mg/L untuk sungai (lebih ketat ≤2/2,5/3 mg/L untuk danau). Nitrogen dan fosfor dibatasi berpasangan karena keduanya memicu blooming alga.Có. T-P được giới hạn riêng ở mức ≤4/6/10 mg/L cho sông (nghiêm hơn ≤2/2,5/3 mg/L cho hồ). Nitơ và photpho bị giới hạn theo cặp vì cả hai đều gây tảo nở hoa.ใช้ T-P ถูกจำกัดแยกต่างหากที่ ≤4/6/10 mg/L สำหรับแม่น้ำ (เข้มงวดขึ้น ≤2/2.5/3 mg/L สำหรับทะเลสาบ) ไนโตรเจนและฟอสฟอรัสถูกจำกัดเป็นคู่เพราะทั้งสองกระตุ้นการ bloom ของสาหร่ายYa. T-P dihadkan secara berasingan pada ≤4/6/10 mg/L untuk sungai (lebih ketat ≤2/2.5/3 mg/L untuk tasik). Nitrogen dan fosforus dihadkan secara berpasangan kerana kedua-duanya mencetuskan mekar alga.Oo. Ang T-P ay hiwalay na nililimitahan sa ≤4/6/10 mg/L para sa mga ilog (mas mahigpit ≤2/2.5/3 mg/L para sa mga lawa). Ang nitrogen at phosphorus ay nililimitahan bilang pares dahil pareho nilang nagdudulot ng algal blooms.