PL117604B2 - Process for waste water reclamation from urea-containing wastesochevinu - Google Patents
Process for waste water reclamation from urea-containing wastesochevinu Download PDFInfo
- Publication number
- PL117604B2 PL117604B2 PL22081479A PL22081479A PL117604B2 PL 117604 B2 PL117604 B2 PL 117604B2 PL 22081479 A PL22081479 A PL 22081479A PL 22081479 A PL22081479 A PL 22081479A PL 117604 B2 PL117604 B2 PL 117604B2
- Authority
- PL
- Poland
- Prior art keywords
- urea
- wastesochevinu
- waste water
- sewage
- water reclamation
- Prior art date
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims description 18
- 239000004202 carbamide Substances 0.000 title claims description 18
- 238000000034 method Methods 0.000 title claims description 12
- 239000002351 wastewater Substances 0.000 title description 7
- 239000010865 sewage Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims description 2
- 239000003729 cation exchange resin Substances 0.000 claims description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910017464 nitrogen compound Inorganic materials 0.000 description 2
- 150000002830 nitrogen compounds Chemical class 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005115 demineralization Methods 0.000 description 1
- 230000002328 demineralizing effect Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000010841 municipal wastewater Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Landscapes
- Fertilizers (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Removal Of Specific Substances (AREA)
Description
Przedmiotem wynalazkujest sposób odzysku wody ze sciekówzawierajacych mocznik, majacy szczegól¬ ne zastosowaniew zakladach przemyslu azotowego, a zwlaszcza produkujacych mocznik lubjego pochodne.Ciagly wzrost zawartosci zwiazków azotowych w wodach powierzchniowych spowodowany wzrostem ilosci wydalanych scieków przez zaklady przemyslowe o profilu produkcji zwiazków azotowych oraz w zwiazku ze wzrostem wielkosci aglomeracji miejskich i zwiazanym z tym zrzutem scieków komunalnych, a takze w zwiazku ze wzrostem zuzycia nawozów mineralnych w rolnictwie i zwiazanym z tym zwiekszeniem zawartosci zwiazków azotowych w wodach infiltracyjnych, prowadzi do powaznych zaklócen procesów hydrobiologicznych. Wskutek procesów eutrofizacji, powodowanych przez nadmierna zawartosc substancji pozywkowych, do których naleza zwiazki azotowe, woda zawarta w szeregu zbiornikachpowierzchniowych traci swoje walory uzytkowe.Znane sa biologiczne metody rozkladu mocznikaw sciekach, polegajace nahodowli mikroorganizmów, które badz to rozkladaja mocznik do wolnego azotu i dwutlenku wegla badz tez go asymiluja.Opracowano takze metode rozkladu mocznika na drodze hydrolizyprzeprowadzonej pod zwiekszonym cisnieniem, przy podniesionej temperaturze. W warunkach tych, mocznik ulega rozkladowi na dwutlenek wegla i amoniak. W nastepnym etapie,powstale zwiazki usuwa sie przezwydmuchiwanie ich z roztworu para wodna lub powietrzem.Do zasadniczych niedogodnosci opisanych sposobów usuwania mocznika ze scieków nalezy, w przy¬ padku metod biologicznych, wysoki koszt inwestycyjny oraz duza zawodnosc powodowana wrazliwoscia organizmów na wahania skladu scieków.Natomiast sposób polegajacy na rozkladzie mocznika droga hydrolizy, aczkolwiek skuteczny, ma te wade, ze jest energochlonny, a przez to bardzo kosztowny.Wynalazek eliminuje opisane niedogodnosci, umozliwiajac calkowite unieszkodliwienie zawartego w sciekach mocznika oraz jednoczesny odzysk wody zdemineralizowanej.Sposób wedlug wynalazku polega na tym, ze do scieku zawierajacego mocznik wprowadza sie, podczas intensywnego mieszania, azotyn zwlaszcza sodowy w ilosci, korzystnie wynoszacej 1:1 w stosunku N(nhz)xco : Nnc^, a nastepnie po zaprzestaniu wydzielania siegazówsciek przepuszcza sie najpierwprzezzloze fcationitu slabokwasnego zregenerowane do formy wodorowej, a nastepnie przez desorber gazów.Sposób wedlug wynalazku, charakteryzuje sie duza prostota i wysoka skutecznoscia. W oparciu o przeprowadzone próby stwierdzono calkowity rozklad mocznika oraz niewrazliwosc procesu na wahania w ||ladzie scieków. Sposób ponadto umozliwia pelna demineralizacje scieków, skutkiem czego odzyskana117604 woda charakteryzuje sie wysoka czystoscia umozliwiajaca pelnejej wykorzystanie do celów produkcyjnych.Przyklad I. Scieki pochodzace z jednostki produkujacej mocznik zawieraly 212mgmocznika/dm\ Do 10 dm3 scieków dodano 2,93 g azotynu sodowego, intensywnie mieszajac. Po czym scieki te z szybkoscia 25 objetosci zlozowych na godzine przetloczono przez zloze slabokwasnego kationitu (Wofatitu Ca-20) zregenerowanego uprzednio za pomoca 4% roztworu H2SO4. Otrzymano wode zdemineralizowana w ilosci 177 objetosci z jednej objetosci zloza. W wodzie zdemineralizowanej nie wykryto obecnosci mocznika.Przyklad II. Scieki pochodzace z produkcji mocznika zawieraly 450mg mocznika/dm3. Do 10dm3 scieków dodano 6,22g azotynu sodowego, intensywnie mieszajac. Nastepnie roztwór przetloczono przez zlote slabokwasnego kationitu (Wofatitu Ca-20) z szybkoscia 25 objetosci zlozowych na godzine. Kationit uprzednio zostal zregenerowany 4% roztworem H2SO4. Otrzymano wode zdemineralizowana w ilosci 83 objetosci z jednej objetosci zloza kationitowego. W wodzie zdemineralizowanej nie wykryto obecnosci mocznika.Zastrzezenie patentowe Sposób odzysku wody ze scieków zawierajacych mocznik, znamienny tym, ze do scieku dodaje sie najpierw, podczas intensywnego mieszania azotyn, zwlaszcza sodowy w stosunku N^h^o : Nnoakorzystnie 1:1, po czym sciek po zaprzestaniu wydzielania sie gazów kieruje sie na zloze kationitowe slabokwasne, zregenerowane do formy wodorowej, a nastepnie przepuszcza przez desorber dwutlenku wegla.Prac. Poligraf. UP PRL. Naklad 120 egz.Cena 100 zl PLThe subject of the invention is a method of water recovery from urea-containing wastewater, which is used in particular in nitrogen industry plants, especially those producing urea or its derivatives. The increase in the size of urban agglomerations and the related discharge of municipal wastewater, as well as in connection with the increase in the consumption of mineral fertilizers in agriculture and the related increase in the content of nitrogen compounds in infiltration waters, leads to serious disturbances in hydrobiological processes. As a result of eutrophication processes caused by the excessive content of nutrients, including nitrogen compounds, the water contained in a number of surface reservoirs loses its useful value. There are biological methods of urea decomposition in sewage, consisting in the cultivation of microorganisms that decompose urea into free nitrogen and carbon dioxide or assimilate it. A method of decomposition of urea by hydrolysis carried out under increased pressure and elevated temperature has also been developed. Under these conditions, urea is broken down into carbon dioxide and ammonia. In the next stage, the compounds formed are removed by blowing them out of the solution with steam or air. The main disadvantages of the described methods of removing urea from sewage include, in the case of biological methods, the high investment cost and high unreliability caused by the sensitivity of organisms to fluctuations in the composition of the sewage. The method of decomposing urea by hydrolysis, although effective, has the disadvantage that it is energy-intensive, and therefore very expensive. The invention eliminates the disadvantages described, making it possible to completely neutralize urea contained in the wastewater and, at the same time, to recover demineralised water. that the urea-containing sewage is mixed with, during intensive stirring, nitrite, especially sodium, in an amount, preferably 1: 1 in the ratio N (nhz) xco: Nnc ^, and then, after cessation of discharge of the sewage, the sewage is first passed through a low acid fcyationite regenerated to form and then by gas desorber. The method according to the invention is characterized by great simplicity and high efficiency. Based on the tests performed, the complete decomposition of urea was found and the process was insensitive to fluctuations in the wastewater track. Moreover, the method enables complete demineralization of wastewater, as a result of which the recovered117604 water is characterized by high purity, which enables its full use for production purposes. . Then the sewage, at the rate of 25 bed volumes per hour, was forced through the bed of weak acid cation exchanger (Wofatitu Ca-20) previously regenerated with a 4% H2SO4 solution. Demineralized water was obtained in the amount of 177 volumes from one volume of the deposit. No urea was detected in demineralized water. Example II. Wastewater from urea production contained 450 mg urea / dm3. To 10 liters of sewage was added 6.22 g of sodium nitrite while stirring intensively. The solution was then forced through the gold of a weak acid cation exchanger (Wofatitu Ca-20) at a rate of 25 bed volumes per hour. The cation exchanger was previously regenerated with a 4% H2SO4 solution. Demineralized water was obtained in the amount of 83 volumes from one volume of the cationic deposit. No urea was detected in demineralised water. Patent claim A method of recovering water from sewage containing urea, characterized in that nitrite, in particular sodium, in the ratio N ^ h ^ o: 1: 1, is added to the waste water first with intensive stirring. After gas evolution ceases, the effluent is directed to a low-acid cation exchange resin, regenerated into a hydrogen form, and then passed through a carbon dioxide desorber. Typographer. UP PRL. Mintage 120 copies Price PLN 100 PL
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL22081479A PL117604B2 (en) | 1979-12-27 | 1979-12-27 | Process for waste water reclamation from urea-containing wastesochevinu |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL22081479A PL117604B2 (en) | 1979-12-27 | 1979-12-27 | Process for waste water reclamation from urea-containing wastesochevinu |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL220814A2 PL220814A2 (en) | 1980-11-03 |
| PL117604B2 true PL117604B2 (en) | 1981-08-31 |
Family
ID=20000349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL22081479A PL117604B2 (en) | 1979-12-27 | 1979-12-27 | Process for waste water reclamation from urea-containing wastesochevinu |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL117604B2 (en) |
-
1979
- 1979-12-27 PL PL22081479A patent/PL117604B2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL220814A2 (en) | 1980-11-03 |
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