Daim ntawv thov Case ntawm Effluent Monitoring ntawm Spring Manufacturing Company

Nyob rau hauv cov txheej txheem kev kho deg ntawm springs, phosphating yog ua hauj lwm los tsim ib tug tiv thaiv txheej uas tiv thaiv corrosion. Qhov no suav nrog immersing springs hauv cov tshuaj phosphating uas muaj hlau ions xws li zinc, manganese, thiab npib tsib xee. Los ntawm cov tshuaj tiv thaiv, ib qho insoluble phosphate ntsev zaj duab xis yog tsim rau ntawm lub caij nplooj ntoos hlav nto.

Cov txheej txheem no tsim ob hom dej khib nyiab
1. Phosphating Waste Bath Solution: Lub da dej phosphating yuav tsum tau hloov ib ntus, ua rau cov kua khib nyiab siab. Cov pa phem tseem ceeb suav nrog zinc, manganese, nickel, thiab phosphate.
2. Phosphating Rinse Dej: Tom qab phosphating, ntau theem rinsing yog ua. Txawm hais tias cov pa phem concentration tsawg dua li qhov siv da dej, qhov ntim yog ntau heev. Cov dej yaug no muaj cov seem zinc, manganese, npib tsib xee, thiab phosphorus tag nrho, uas yog lub hauv paus tseem ceeb ntawm phosphating dej khib nyiab hauv cov chaw tsim khoom caij nplooj ntoos hlav.

Cov ntsiab lus nthuav dav ntawm Cov Tshuaj Pleev Xim Tseem Ceeb:
1. Hlau - Thawj Metallic Pollutant
Tau qhov twg los: Feem ntau yog los ntawm cov txheej txheem acid pickling, qhov twg lub caij nplooj ntoos hlav steel yog kho nrog hydrochloric los yog sulfuric acid kom tshem tawm cov hlau oxide nplai (xeb). Qhov no ua rau muaj kev cuam tshuam loj ntawm cov hlau ions rau hauv cov dej khib nyiab.
Qhov laj thawj rau kev saib xyuas thiab tswj:
- Pom qhov cuam tshuam: Thaum tso tawm, ferrous ions oxidize rau ferric ions, tsim xim liab-xim av ferric hydroxide precipitates uas ua rau turbidity thiab discoloration ntawm lub cev dej.
- Ecological Effects: Accumulated ferric hydroxide tuaj yeem nyob ntawm ntug dej, ua rau cov kab mob benthic thiab cuam tshuam cov dej hauv dej.
- Infrastructure Teeb meem: Hlau deposits yuav ua rau cov yeeb nkab txhaws thiab txo qhov system efficiency.
- Kev Kho Mob Yuav Tsum Tau: Txawm tias nws cov tshuaj toxicity tsawg, hlau feem ntau muaj nyob rau hauv siab concentrations thiab tuaj yeem raug tshem tawm tau zoo los ntawm kev hloov pH thiab nag lossis daus. Pretreatment yog qhov tseem ceeb los tiv thaiv kev cuam tshuam nrog cov txheej txheem hauv qab.

2. Zinc thiab Manganese - "Phosphating Pair"
Cov peev txheej: Cov ntsiab lus no feem ntau yog los ntawm cov txheej txheem phosphating, uas yog qhov tseem ceeb rau kev txhim kho xeb tiv thaiv thiab txheej adhesion. Feem ntau lub caij nplooj ntoos hlav manufacturers siv zinc- lossis manganese-based phosphating daws. Tom qab dej yaug yog nqa zinc thiab manganese ions mus rau hauv cov dej khib nyiab.
Qhov laj thawj rau kev saib xyuas thiab tswj:
- Aquatic Toxicity: Ob lub hlau muaj toxicity rau ntses thiab lwm yam kab mob hauv dej, txawm tias tsis tshua muaj siab, cuam tshuam rau kev loj hlob, kev loj hlob, thiab kev ciaj sia.
- Zinc: Impairs ntses gill muaj nuj nqi, cuam tshuam ua pa ua pa.
- Manganese: Kev raug mob ntev ua rau bioaccumululation thiab muaj peev xwm cuam tshuam neurotoxic.
- Kev Tswj Xyuas Kev Ua Raws Cai: Cov qauv kev tso tawm hauv tebchaws thiab thoob ntiaj teb txwv nruj rau zinc thiab manganese concentrations. Kev tshem tawm zoo feem ntau yuav tsum muaj tshuaj los nag siv alkaline reagents los tsim cov hydroxides insoluble.

3. Nickel – Ib qho kev pheej hmoo siab hnyav hlau uas yuav tsum tau muaj kev tswj hwm nruj
Qhov chaw:
- Inherent hauv raw cov ntaub ntawv: Qee cov hlau alloy, nrog rau cov hlau tsis muaj steel, muaj cov nickel, uas yaj rau hauv cov kua qaub thaum lub sij hawm pickling.
- Cov txheej txheem kho deg: Qee qhov tshwj xeeb electroplating lossis tshuaj coatings suav nrog cov nickel compounds.
Rationale for Monitoring and Control (Qhov Tseem Ceeb Tseem Ceeb):
- Kev Noj Qab Haus Huv thiab Ib Cheeb Tsam Kev Nyab Xeeb: Nickel thiab qee cov nickel compounds raug cais raws li cov kab mob carcinogens. Lawv kuj ua rau muaj kev pheej hmoo vim lawv toxicity, allergenic zog, thiab muaj peev xwm rau bioaccumulation, nthuav tawm kev hem thawj rau tib neeg kev noj qab haus huv thiab ecosystems.
- Kev txwv tsis pub muaj zog: Cov kev cai xws li "Integrated Wastewater Discharge Standard" tau teeb tsa ntawm qhov qis tshaj qhov tso cai rau cov npib tsib xee (feem ntau ≤0.5–1.0 mg / L), uas qhia txog nws qib siab txaus ntshai.
- Kev Sib Tw Kev Kho Mob: Cov pa dej alkali tsis tuaj yeem ua tiav qib kev ua raws; Cov txheej txheem siab heev xws li cov neeg ua haujlwm chelating lossis sulfide nag lossis daus feem ntau xav tau kom tshem tawm cov nickel zoo.

Kev tso tawm ncaj qha ntawm cov dej khib nyiab uas tsis tau kho yuav ua rau muaj kev sib kis loj thiab tsis tu ncua ntawm cov dej hauv lub cev thiab av. Yog li ntawd, tag nrho cov effluents yuav tsum tau txais kev kho kom zoo thiab kev sim nruj kom ntseeg tau tias kev ua raws cai ua ntej tso tawm. Kev saib xyuas lub sijhawm tiag tiag ntawm lub qhov hluav taws xob tso tawm yog ib qho kev ntsuas tseem ceeb rau cov lag luam kom ua tiav ib puag ncig lub luag haujlwm, lav kev tswj hwm kev ua raws cai, thiab txo cov kev pheej hmoo ntawm ecological thiab raug cai.