{"id":7132,"date":"2024-07-23T06:52:47","date_gmt":"2024-07-23T06:52:47","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=7132"},"modified":"2026-08-25T09:31:00","modified_gmt":"2026-08-25T09:31:00","slug":"how-do-we-treat-acrylic-wastewater-and-off-gases","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/hu\/how-do-we-treat-acrylic-wastewater-and-off-gases\/","title":{"rendered":"Acrylic Wastewater and Off-Gas Treatment Guide"},"content":{"rendered":"

Gyors v\u00e1lasz:<\/strong> Acrylic-process wastewater and off-gas require source characterization before treatment selection. Flow, pH, COD, suspended solids, residual monomers, solvents, salts, variability, biodegradability, VOC load and discharge limits all affect the process train.<\/p>\n

Az akril\u00e9szter-ipar nagyon sz\u00e9les k\u00f6r\u0171 fejl\u0151d\u00e9si kil\u00e1t\u00e1sokkal rendelkezik, mik\u00f6zben a k\u00f6rnyezetv\u00e9delmi k\u00e9rd\u00e9seket nem lehet figyelmen k\u00edv\u00fcl hagyni, az akril\u00e9szter szennyv\u00edzkezel\u00e9si folyamat elker\u00fclhetetlen aggodalomra ad okot. A k\u00f6vetkez\u0151 Liyuan k\u00f6rnyezetv\u00e9delem veled, hogy meg\u00e9rts\u00fck az ilyen ipari szennyv\u00edz kezel\u00e9s\u00e9t.<\/p>\n

Az akril\u00e1t szennyv\u00edz els\u0151sorban ecetsavat, metakrilsavat, akrilsavat, formaldehidet, acetaldehidet, metil-szulfonsavat \u00e9s n\u00e9h\u00e1ny arom\u00e1s vegy\u00fcletet \u00e9s egy\u00e9b szerves anyagot tartalmaz, k\u00e9miai oxig\u00e9nig\u00e9nye (COD) ak\u00e1r t\u00f6bb t\u00edzezer sz\u00e1zezer mg \/ L, a magas koncentr\u00e1ci\u00f3j\u00fa szerves szennyv\u00edzhez tartozik, nagy koncentr\u00e1ci\u00f3j\u00fa, \u00f6sszetett \u00f6sszet\u00e9tel\u0171, m\u00e9rgez\u0151 \u00e9s k\u00e1ros tulajdons\u00e1gokkal, er\u0151sen savas, bizonyos fok\u00fa mar\u00f3 hat\u00e1s\u00fa.<\/p>\n

Jelenleg az akril\u00e1tos szennyv\u00edzkezel\u00e9s sor\u00e1n a k\u00f6vetkez\u0151 t\u00edpus\u00fa m\u00f3dszereket haszn\u00e1lj\u00e1k \u00e1ltal\u00e1ban itthon \u00e9s k\u00fclf\u00f6ld\u00f6n:<\/p>\n

(1) biol\u00f3giai kezel\u00e9si m\u00f3dszerek, azaz a k\u00fcl\u00f6nb\u00f6z\u0151 anaerob, aerob folyamatok vagy az elj\u00e1r\u00e1sok kombin\u00e1ci\u00f3j\u00e1nak haszn\u00e1lata az ilyen szennyv\u00edz kezel\u00e9s\u00e9re, a BOD \/ COD alacsony, nem k\u00f6nny\u0171 biok\u00e9miai szennyv\u00edz, hozz\u00e1adhat\u00f3 n\u00e9h\u00e1ny k\u00f6nny\u0171 biok\u00e9miai szerves anyaghoz vagy szennyv\u00edzkever\u00e9shez \u00e9s a szennyv\u00edzkezel\u00e9s h\u00edg\u00edt\u00e1s\u00e1hoz.<\/p>\n

(2) M\u00e9lys\u00e9gi oxid\u00e1ci\u00f3s m\u00f3dszer, k\u00fcl\u00f6nb\u00f6z\u0151 m\u00f3dszerekkel hidroxilgy\u00f6k\u00f6k \u00e9s szerves reakci\u00f3 el\u0151\u00e1ll\u00edt\u00e1s\u00e1ra, a szerves anyagok k\u00f6zvetlen oxid\u00e1ci\u00f3ja CO2, H2O \u00e9s egy\u00e9b anyagok form\u00e1j\u00e1ban, vagy a biok\u00e9miai kezel\u00e9s el\u0151kezel\u00e9si eszk\u00f6zek\u00e9nt, a biol\u00f3giailag nem leboml\u00f3 szerves anyagok oxid\u00e1ci\u00f3ja \u00e9s leboml\u00e1sa k\u00f6nnyen biol\u00f3giailag leboml\u00f3 szerves anyagokk\u00e1, a szennyv\u00edz biok\u00e9mi\u00e1j\u00e1nak jav\u00edt\u00e1sa \u00e9rdek\u00e9ben, ilyen technol\u00f3gi\u00e1k: vas \u00e9s sz\u00e9n mikroelektrol\u00edzis technol\u00f3gia, Fenton reagens oxid\u00e1ci\u00f3, fotokatalitikus oxid\u00e1ci\u00f3s technol\u00f3gia, nedves oxid\u00e1ci\u00f3s technol\u00f3gia \u00e9s \u00edgy tov\u00e1bb. technol\u00f3gia, fotokatalitikus oxid\u00e1ci\u00f3s technol\u00f3gia, nedves oxid\u00e1ci\u00f3s technol\u00f3gia stb.<\/p>\n

(3) Fizikai-k\u00e9miai m\u00f3dszer, bele\u00e9rtve a koagul\u00e1ci\u00f3t, a csapad\u00e9k-el\u0151kezel\u00e9st, a p\u00e1rologtat\u00e1s, a sz\u00e1r\u00edt\u00e1s, a krist\u00e1lyos\u00edt\u00e1s \u00e9s m\u00e1s m\u00f3dszerek haszn\u00e1lat\u00e1t az akril\u00e9szter szennyv\u00edzben \u00e9s a v\u00edzben l\u00e9v\u0151 szennyez\u0151 anyagok elv\u00e1laszt\u00e1s\u00e1ra a szennyv\u00edztiszt\u00edt\u00e1s c\u00e9lj\u00e1nak el\u00e9r\u00e9se \u00e9rdek\u00e9ben.<\/p>\n

Az akril\u00e1t szennyv\u00edzkezel\u00e9si folyamat alkalmaz\u00e1sa sor\u00e1n gyakran kombin\u00e1lj\u00e1k k\u00fcl\u00f6nb\u00f6z\u0151 technol\u00f3gi\u00e1kkal, \u00e1tfog\u00f3 kezel\u00e9ssel, a szennyv\u00edz hat\u00e9kony kezel\u00e9s\u00e9nek el\u00e9r\u00e9se \u00e9rdek\u00e9ben.<\/p>\n

Akrilsav fontos k\u00e9miai nyersanyag, a gazdas\u00e1g fejl\u0151d\u00e9s\u00e9vel, el\u0151seg\u00edti az eg\u00e9sz ipar fejl\u0151d\u00e9s\u00e9t, a fejl\u0151d\u00e9s folyamata sor\u00e1n nagy mennyis\u00e9g\u0171 szennyvizet hoz, a k\u00f6rnyezet k\u00e1rosod\u00e1s\u00e1nak elker\u00fcl\u00e9se \u00e9rdek\u00e9ben a megfelel\u0151 akrilsavipari szennyv\u00edzkezel\u00e9si m\u00f3dszerek haszn\u00e1lat\u00e1nak sz\u00fcks\u00e9gess\u00e9ge, hogy a szabv\u00e1nyok kezel\u00e9se ut\u00e1n ki\u00fcr\u00fclj\u00f6n. A k\u00f6vetkez\u0151 Liyuan k\u00f6rnyezetv\u00e9delem veled, hogy meg\u00e9rts\u00e9k az akrilipari szennyv\u00edzkezel\u00e9s.<\/p>\n

Az akrilsav-ipari szennyv\u00edz ecetsavat, metakrilsavat, akrilsavat, formaldehidet, acetaldehidet \u00e9s m\u00e1s szerves anyagokat tartalmaz, k\u00e9miai oxig\u00e9nig\u00e9nye (CODcr) t\u00f6bb t\u00edzezer \u00e9s t\u00f6bb mint sz\u00e1zezer mg \/ L k\u00f6z\u00f6tti, er\u0151sen savas, a nagy koncentr\u00e1ci\u00f3j\u00fa szerves szennyv\u00edzhez tartoz\u00f3, magas koncentr\u00e1ci\u00f3j\u00fa, \u00f6sszetett \u00f6sszet\u00e9tel\u0171, m\u00e9rgez\u0151 \u00e9s vesz\u00e9lyes stb., a hagyom\u00e1nyos kezel\u00e9si m\u00f3dszer nehezebb.<\/p>\n

Jelenleg az akrilsavipar szennyv\u00edzkezel\u00e9si m\u00f3dszerei f\u0151k\u00e9nt biok\u00e9miai m\u00f3dszer, katalitikus nedves oxid\u00e1ci\u00f3 \u00e9s \u00e9get\u00e9si m\u00f3dszer. Mivel a szennyv\u00edz toxikus anyagokat tartalmaz a mikroorganizmusok sz\u00e1m\u00e1ra, \u00e9s a t\u00e1panyagok hi\u00e1nya miatt az ilyen t\u00edpus\u00fa szennyv\u00edz biok\u00e9miai kezel\u00e9s\u00e9nek k\u00f6zvetlen haszn\u00e1lata, k\u00fcl\u00f6n\u00f6sen az akrilsav szennyv\u00edz nagy koncentr\u00e1ci\u00f3j\u00e1nak hat\u00e1sa nem j\u00f3. A katalitikus nedves oxid\u00e1ci\u00f3s m\u00f3dszer nem tudja teljesen lebontani a szerves anyagokat az akrilsavgy\u00e1rt\u00f3 szennyv\u00edzben, \u00e9s a kataliz\u00e1tor meghib\u00e1sod\u00e1sa \u00e9s a m\u00e1sodlagos szennyez\u00e9s probl\u00e9m\u00e1i vannak, a v\u00edz reakci\u00f3ja m\u00e9g mindig tov\u00e1bbi kezel\u00e9st ig\u00e9nyel, ami n\u00f6veli a kezel\u00e9s k\u00f6lts\u00e9geit. Az \u00e9get\u00e9si m\u00f3dszer probl\u00e9m\u00e1i a magas k\u00f6lts\u00e9gek \u00e9s a nagy egyszeri beruh\u00e1z\u00e1s, ami megnehez\u00edti az ipari elterjed\u00e9s\u00e9t.<\/p>\n

A fenti probl\u00e9m\u00e1k megold\u00e1sa \u00e9rdek\u00e9ben az akrilsavipar szennyv\u00edzkezel\u00e9se elektrokatalitikus oxid\u00e1ci\u00f3val, a szennyv\u00edz az \u00e1tfog\u00f3 be\u00e1ll\u00edt\u00e1si medenc\u00e9be a v\u00edzmin\u0151s\u00e9g, a v\u00edzmennyis\u00e9g \u00e9s a pH be\u00e1ll\u00edt\u00e1sa \u00e9rdek\u00e9ben, az \u00e1tfog\u00f3 be\u00e1ll\u00edt\u00e1si medence szennyv\u00edz az impulzusos anaerob reakci\u00f3medenc\u00e9be, az anaerob kezel\u00e9s ut\u00e1n, az impulzusos anaerob reakci\u00f3medence szennyv\u00edz a kontakt oxid\u00e1ci\u00f3s medenc\u00e9be aerob kezel\u00e9s, a kezelt szennyv\u00edz a m\u00e1sodik \u00fclep\u00edt\u0151 tart\u00e1lyba iszap-v\u00edz elv\u00e1laszt\u00e1s, megfelel a kibocs\u00e1tott szennyv\u00edz szabv\u00e1nyainak.<\/p>\n

Ez az akrilsav-ipari szennyv\u00edzkezel\u00e9si m\u00f3dszer az anaerob biok\u00e9miai kezel\u00e9sen kereszt\u00fcl az elektromos hidrog\u00e9nez\u0151 oxid\u00e1ci\u00f3s eszk\u00f6z hozz\u00e1ad\u00e1sa el\u0151tt, \u00e9s a hagyom\u00e1nyos anaerob reakci\u00f3medence helyett az impulzus anaerob reaktor, a kezel\u00e9si folyamat egyszer\u0171, a kezel\u00e9si kapacit\u00e1s nagy, \u00e9s a kezel\u00e9s hat\u00e9konys\u00e1ga jelent\u0151sen javult.<\/p>\n

Akrilsav hullad\u00e9kg\u00e1zforr\u00e1s jellemz\u0151i<\/p>\n

Az akrilsav hullad\u00e9kg\u00e1z f\u0151k\u00e9nt az akrilsav \u00e9s sz\u00e1rmaz\u00e9kai gy\u00e1rt\u00e1s\u00e1b\u00f3l \u00e9s felhaszn\u00e1l\u00e1s\u00e1b\u00f3l sz\u00e1rmazik. Ezek a kipufog\u00f3g\u00e1zok \u00e1ltal\u00e1ban ill\u00e9kony szerves vegy\u00fcleteket (VOC), p\u00e9ld\u00e1ul akril-monomert, metil-akril\u00e1tot, etil-akril\u00e1tot stb. tartalmaznak. Az akrilsav kipufog\u00f3g\u00e1zok f\u0151 jellemz\u0151i a k\u00f6vetkez\u0151k:<\/p>\n

\u00d6sszetett \u00f6sszet\u00e9tel: a kipufog\u00f3g\u00e1z k\u00fcl\u00f6nb\u00f6z\u0151 akrilsavakat \u00e9s sz\u00e1rmaz\u00e9kait tartalmazhatja, amelyek k\u00fcl\u00f6nb\u00f6z\u0151 k\u00e9miai tulajdons\u00e1gokkal \u00e9s toxicit\u00e1ssal rendelkeznek.<\/p>\n

Koncentr\u00e1ci\u00f3 ingadoz\u00e1s: A gy\u00e1rt\u00e1si tev\u00e9kenys\u00e9gek v\u00e1ltoz\u00e1sa miatt az akrilsav \u00e9s sz\u00e1rmaz\u00e9kai koncentr\u00e1ci\u00f3ja a kipufog\u00f3g\u00e1zban is ingadozhat, ami megnehez\u00edti a kezel\u00e9st.<\/p>\n

\u00c1rtalmas: Az akrilsav \u00e9s sz\u00e1rmaz\u00e9kai potenci\u00e1lisan k\u00e1rosak az emberi eg\u00e9szs\u00e9gre \u00e9s a k\u00f6rnyezetre, ez\u00e9rt kibocs\u00e1t\u00e1sukat szigor\u00faan ellen\u0151rizni kell.<\/p>\n

Akrilsav hullad\u00e9kg\u00e1z-kezel\u00e9si elj\u00e1r\u00e1s<\/p>\n

Az akrilhullad\u00e9k-g\u00e1zkezel\u00e9si folyamat \u00e1ltal\u00e1ban a k\u00f6vetkez\u0151 l\u00e9p\u00e9seket foglalja mag\u00e1ban:<\/p>\n

Kipufog\u00f3g\u00e1z-gy\u0171jt\u00e9s: A gy\u00e1rt\u00e1si folyamat sor\u00e1n keletkez\u0151 akril f\u00fcstg\u00e1zok \u00f6sszegy\u0171jt\u00e9se cs\u0151vezet\u00e9keken \u00e9s l\u00e9tes\u00edtm\u00e9nyeken, p\u00e9ld\u00e1ul l\u00e9ggy\u0171jt\u0151 cs\u00f6veken kereszt\u00fcl, hogy megakad\u00e1lyozz\u00e1k a k\u00f6zvetlen l\u00e9gk\u00f6rbe t\u00f6rt\u00e9n\u0151 kibocs\u00e1t\u00e1s\u00e1t.<\/p>\n

El\u0151kezel\u00e9s: Az \u00f6sszegy\u0171jt\u00f6tt kipufog\u00f3g\u00e1z el\u0151kezel\u00e9se, p\u00e9ld\u00e1ul por- \u00e9s p\u00e1raelt\u00e1vol\u00edt\u00e1s stb. a kipufog\u00f3g\u00e1zban l\u00e9v\u0151 szil\u00e1rd r\u00e9szecsk\u00e9k \u00e9s folyad\u00e9kcseppek elt\u00e1vol\u00edt\u00e1sa \u00e9s a k\u00e9s\u0151bbi kezel\u00e9shez kedvez\u0151 felt\u00e9telek biztos\u00edt\u00e1sa \u00e9rdek\u00e9ben.<\/p>\n

Adszorpci\u00f3s kezel\u00e9s: A kipufog\u00f3g\u00e1zban l\u00e9v\u0151 akrilos anyagok adszorpci\u00f3ja adszorbensek, p\u00e9ld\u00e1ul akt\u00edv sz\u00e9n seg\u00edts\u00e9g\u00e9vel a kipufog\u00f3g\u00e1z tiszt\u00edt\u00e1sa \u00e9rdek\u00e9ben. Az akt\u00edv sz\u00e9n nagy fajlagos fel\u00fclettel \u00e9s kiv\u00e1l\u00f3 adszorpci\u00f3s teljes\u00edtm\u00e9nnyel rendelkezik, amely hat\u00e9konyan k\u00e9pes elt\u00e1vol\u00edtani a VOC-okat a f\u00fcstg\u00e1zb\u00f3l.<\/p>\n

Katalitikus oxid\u00e1ci\u00f3: A kipufog\u00f3g\u00e1zban l\u00e9v\u0151 VOC-ok alacsonyabb gyullad\u00e1si h\u0151m\u00e9rs\u00e9kleten l\u00e1ng n\u00e9lk\u00fcli oxidat\u00edv \u00e9g\u00e9sen mennek kereszt\u00fcl, oxid\u00e1l\u00f3dnak \u00e9s CO2-ra \u00e9s H2O-ra bomlanak, \u00e9s nagy mennyis\u00e9g\u0171 h\u0151energi\u00e1t szabad\u00edtanak fel. A katalitikus oxid\u00e1ci\u00f3s technol\u00f3gia el\u0151nye a magas feldolgoz\u00e1si hat\u00e9konys\u00e1g \u00e9s az alacsony energiafogyaszt\u00e1s, amely hat\u00e9kony m\u00f3dszer az akrilhullad\u00e9kg\u00e1zok kezel\u00e9s\u00e9re.<\/p>\n

Akril hullad\u00e9kg\u00e1z kezel\u0151 tok<\/p>\n

Az al\u00e1bbiakban az akrilsav hullad\u00e9kg\u00e1zok kezel\u00e9s\u00e9nek eset\u00e9t mutatjuk be:<\/p>\n

Az eset h\u00e1ttere: Egy vegyi \u00fczem nagy mennyis\u00e9g\u0171 akrilg\u00e1zt termel az akrilgyanta gy\u00e1rt\u00e1sa sor\u00e1n, \u00e9s ezeknek a kipufog\u00f3g\u00e1zoknak a l\u00e9gk\u00f6rbe t\u00f6rt\u00e9n\u0151 k\u00f6zvetlen kibocs\u00e1t\u00e1sa komoly hat\u00e1ssal van a k\u00f6rnyezetre \u00e9s az emberi eg\u00e9szs\u00e9gre. A probl\u00e9ma megold\u00e1sa \u00e9rdek\u00e9ben a vegyi \u00fczem akt\u00edvsz\u00e9n-adszorpci\u00f3t + katalitikus oxid\u00e1ci\u00f3t alkalmazott a kipufog\u00f3g\u00e1z-kezel\u00e9si folyamathoz.<\/p>\n

Kezel\u00e9si folyamat:<\/p>\n

Kipufog\u00f3g\u00e1z-gy\u0171jt\u00e9s: A gy\u00e1rt\u00e1si folyamat sor\u00e1n keletkez\u0151 akrilsav kipufog\u00f3g\u00e1zt egy nagy hat\u00e9konys\u00e1g\u00fa l\u00e9ggy\u0171jt\u0151 rendszer seg\u00edts\u00e9g\u00e9vel \u00e1tfog\u00f3an \u00f6sszegy\u0171jtik.<\/p>\n

El\u0151kezel\u00e9s: Az \u00f6sszegy\u0171jt\u00f6tt kipufog\u00f3g\u00e1zt portalan\u00edtj\u00e1k \u00e9s k\u00f6dtelen\u00edtik a szil\u00e1rd r\u00e9szecsk\u00e9k \u00e9s folyad\u00e9kcseppek elt\u00e1vol\u00edt\u00e1sa \u00e9rdek\u00e9ben.<\/p>\n

Akt\u00edvsz\u00e9n-adszorpci\u00f3: Az el\u0151kezelt kipufog\u00f3g\u00e1zt adszorpci\u00f3s kezel\u00e9sre az akt\u00edvszenes adszorpci\u00f3s toronyba k\u00fcldik. Az akt\u00edvsz\u00e9n-adszorpci\u00f3s tornyot nagy fajlagos fel\u00fclet\u0171 akt\u00edvsz\u00e9n adszorbenssel t\u00f6ltik meg, amely hat\u00e9konyan k\u00e9pes a f\u00fcstg\u00e1zban l\u00e9v\u0151 akrilsav-hat\u00f3anyagokat adszorbe\u00e1lni.<\/p>\n

Katalitikus oxid\u00e1ci\u00f3: Ha az akt\u00edv sz\u00e9n adszorpci\u00f3ja tel\u00edtett, a deszorpci\u00f3t forr\u00f3 leveg\u0151vel vagy g\u0151zzel v\u00e9gzik az akt\u00edv sz\u00e9nre adszorbe\u00e1l\u00f3dott akril anyagok deszorpci\u00f3ja \u00e9rdek\u00e9ben. A deszorbe\u00e1lt nagy koncentr\u00e1ci\u00f3j\u00fa szerves hullad\u00e9kg\u00e1zt ezut\u00e1n katalitikus oxid\u00e1ci\u00f3s berendez\u00e9sbe k\u00fcldik katalitikus oxid\u00e1ci\u00f3s kezel\u00e9sre. A kataliz\u00e1tor hat\u00e1s\u00e1ra a VOC-ok alacsonyabb h\u0151m\u00e9rs\u00e9kleten l\u00e1ng n\u00e9lk\u00fcli oxidat\u00edv \u00e9g\u00e9sen mennek kereszt\u00fcl, \u00e9s oxidat\u00edv m\u00f3don CO2-re \u00e9s H2O-ra bomlanak.<\/p>\n

Farokg\u00e1z-kibocs\u00e1t\u00e1s: A katalitikus oxid\u00e1ci\u00f3s kezel\u00e9s ut\u00e1n a f\u00fcstg\u00e1zt leh\u0171tik \u00e9s megsz\u0171rik, majd a l\u00e9gk\u00f6rbe bocs\u00e1tj\u00e1k. Ekkor a kipufog\u00f3g\u00e1zban l\u00e9v\u0151 akriltartalm\u00fa anyagokat alapvet\u0151en tiszt\u00e1n elt\u00e1vol\u00edtott\u00e1k, \u00edgy az megfelel a k\u00f6rnyezetv\u00e9delmi kibocs\u00e1t\u00e1si k\u00f6vetelm\u00e9nyeknek.<\/p>\n

Az akt\u00edvsz\u00e9n-adszorpci\u00f3 + katalitikus oxid\u00e1ci\u00f3 f\u00fcstg\u00e1zkezel\u00e9si folyamat\u00e1nak elfogad\u00e1s\u00e1val a vegyi \u00fczem sikeresen megoldotta az akrilsav f\u00fcstg\u00e1zkibocs\u00e1t\u00e1s probl\u00e9m\u00e1j\u00e1t, \u00e9s pozit\u00edvan hozz\u00e1j\u00e1rult a k\u00f6rnyezetv\u00e9delemhez.<\/p>","protected":false},"excerpt":{"rendered":"

Acrylate wastewater treatment process Acrylic ester industry has a very broad development prospects, while bringing environmental issues can not be ignored, the acrylic ester wastewater treatment process is inevitable concern.<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[143],"tags":[],"class_list":["post-7132","post","type-post","status-publish","format-standard","hentry","category-uv-light-curing-series"],"yoast_head":"\nAcrylic Wastewater and Off-Gas Treatment Guide<\/title>\n<meta name=\"description\" content=\"Plan acrylic wastewater and off-gas treatment from measured flow, composition, variability, biodegradability, VOC load, safety and discharge requirements.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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