A detection method of dissolved organic nitrogen concentration in sewage based on dialysis pretreatment
A dissolved organic nitrogen and concentration detection technology, applied in chemical instruments and methods, color/spectral characteristic measurement, dialysis, etc., can solve the problems of high energy consumption, large errors, and many uncertain factors, and achieve low energy consumption, The effect of reducing deviation and reducing the concentration of inorganic nitrogen
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0033] 1. Take 100mL of effluent from a municipal sewage treatment plant in Nanjing (denoted as sample 1), and filter the sewage sample with a filter membrane with a pore size of 0.45 μm.
[0034] 2. Adopt potassium persulfate oxidation-ion chromatography, salicylic acid-hypochlorite photometry and ion chromatography to measure TDN, NH of the sewage treated through step 1 respectively 4 + and NO 3 - concentration, denoted as C TDN(Ⅰ) 、C NH4 + (Ⅰ) and C NO3 - (Ⅰ) .
[0035] 3. (C NH4 + (Ⅰ) +C NO3 - (Ⅰ) ) / C TDN(Ⅰ) =0.92>0.7, C NO3 - (Ⅰ) / C NH4 + (Ⅰ) >1, using Assay Protocol II. Put the sewage into the suspended dialysis bag for dialysis pretreatment, and the dialysis time is 24h. Suspension dialysis bags are made of cellulose ester membrane, which is hydrophilic and has a cut molecular weight of 100Da. The hydraulic retention time of the dialysate was 4 hours. After dialysis, potassium persulfate oxidation-ion chromatography, salicylic acid-hypochlorite...
Embodiment 2
[0038] 1. Take 100mL of sewage from the anaerobic section of a municipal sewage treatment plant in Nanjing (denoted as sample 2). Sewage samples were filtered with a filter membrane with a pore size of 0.45 μm.
[0039] 2. Adopt potassium persulfate oxidation-ion chromatography, salicylic acid-hypochlorite photometry and ion chromatography to measure TDN, NH of the sewage treated through step 1 respectively 4 + and NO 3 - concentration, denoted as C TDN(Ⅰ) 、C NH4+(Ⅰ) and C NO3-(Ⅰ) .
[0040] 3. (C NH4 + (Ⅰ) +C NO3 - (Ⅰ) ) / C TDN(Ⅰ) =0.73>0.7, C NO3 - (Ⅰ) / C NH4 + (Ⅰ) 4 + , NO 3 - and NO 2 - concentration, denoted as C TDN(Ⅲ) 、C NH4 + (Ⅲ) 、C NO3 - (Ⅲ) and C NO2 - (Ⅲ) .
[0041] 4. The concentration of DON is determined by the formula DON=C TDN(Ⅲ) -C NH4 + (Ⅲ) -C NO3 - (Ⅲ) -C NO2 - (Ⅲ) calculated. The DON concentration of sample 2 was 2.43 mg / L. In order to improve the accuracy and reliability of determination, the present embodiment...
Embodiment 3
[0043] 1. Take 100mL of sewage from the aerobic section of a municipal sewage treatment plant in Nanjing (denoted as sample 3). Sewage samples were filtered with a filter membrane with a pore size of 0.45 μm.
[0044] 2. Adopt potassium persulfate oxidation-ion chromatography, salicylic acid-hypochlorite photometry and ion chromatography to measure TDN, NH of the sewage treated through step 1 respectively 4 + and NO 3 - concentration, denoted as C TDN(Ⅰ) 、C NH4 + (Ⅰ) and C NO3 - (Ⅰ) .
[0045] 3. (C NH4 + (Ⅰ) +C NO3 - (Ⅰ) ) / C TDN(Ⅰ) =0.75>0.7, C NO3 - (Ⅰ) / C NH4 + (Ⅰ) >1, using Assay Protocol II. Put the sewage into the suspended dialysis bag for dialysis pretreatment, and the dialysis time is 24h. Suspension dialysis bags are made of cellulose ester membrane, which is hydrophilic and has a cut molecular weight of 100Da. The hydraulic retention time of the dialysate was 4 hours. After dialysis, potassium persulfate oxidation-ion chromatography, salic...
PUM
Property | Measurement | Unit |
---|---|---|
pore size | aaaaa | aaaaa |
molecular weight | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com