Les fraccions separades en els decantadors (primaris i secundaris) de les depuradores s\u2019anomenen fangs o llots de depuraci\u00f3. Aquestes s\u00f3n l\u00edquides, amb concentracions de mat\u00e8ria seca molt baixes. Una part important de la mat\u00e8ria seca dels fangs \u00e9s mat\u00e8ria org\u00e0nica.<\/span><\/h3>\n <\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n
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\n\n\n\n\n\nEls fangs se sotmeten a diferents processos, amb la finalitat de r<\/span>eduir-ne la massa i el volum, <\/span>estabilitzar-ne la fracci\u00f3 org\u00e0nica, h<\/span>igienitzar el material i a<\/span>dequar-ne les caracter\u00edstiques als usos o destinacions finals que es plantegin.<\/span><\/p>\n <\/p>\n
Els processos realitzats per AREMA que conformen el tractament de fangs s\u00f3n els seg\u00fcents:<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n[\/vc_column_text][vc_empty_space height=”80px”][\/qode_elements_holder_item][\/qode_elements_holder][vc_empty_space height=”80px”][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”one_column”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_empty_space height=”30px”][vc_column_text]<\/p>\n
\n\n\n\n\n\n![](\"https:\/\/www.rubau.com\/wp-content\/themes\/rubau\/img\/filet-blanc.png\")
ESPESSIMENT\u00a0 <\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n
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\n\n\n\n\n\nL\u2019espessiment \u00e9s el proc\u00e9s mitjan\u00e7ant el qual incrementem el contingut de s\u00f2lids del fang per eliminar part de la fracci\u00f3 l\u00edquida. La reducci\u00f3 de volum de fangs que s\u2019aconsegueix pot suposar una cinquena part del volum original.<\/p>\n
<\/p>\n
Aquesta reducci\u00f3 en volum millora la gesti\u00f3 dels posteriors tractaments reduint la capacitat necess\u00e0ria de tancs i equips mec\u00e0nics aix\u00ed com la reducci\u00f3 dels requeriments qu\u00edmics pel condicionament i el volum de fang a manipular.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n
[\/vc_column_text][vc_empty_space height=”20px”][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”two_columns”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”581″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”587″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”one_column”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_empty_space height=”30px”][vc_column_text]<\/p>\n
\n\n\n\n\n\n ESTABILITZACI\u00d3\u00a0\u00a0<\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n
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\n\n\n\n\n\nEls processos d\u2019estabilitzaci\u00f3 permeten reduir, inhibir o eliminar el potencial de putrefacci\u00f3 que tenen els fangs degut a la presencia de mat\u00e8ria org\u00e0nica. Simult\u00e0niament se\u2019n redueixen els nivells de pat\u00f2gens i se\u2019n eliminen les olors desagradables. Les t\u00e8cniques d\u2019estabilitzaci\u00f3 de la fracci\u00f3 org\u00e0nica dels fangs es poden agrupar en sistemes biol\u00f2gics i sistemes qu\u00edmics.<\/p>\n
<\/p>\n
Els principals sistemes d\u2019estabilitzaci\u00f3 biol\u00f2gica es coneixen com a digestions (aer\u00f2bies o anaer\u00f2bies, segons es desenvolupin en presencia o abs\u00e8ncia d\u2019oxigen, respectivament). El sistema cl\u00e0ssic d\u2019estabilitzaci\u00f3 qu\u00edmica consisteix en la barreja del fang amb la cal\u00e7.<\/p>\n
Els fangs tamb\u00e9 es poden tractar per altres vies f\u00edsiques (assecatge t\u00e8rmic) o biol\u00f2giques (compostatge) per a aconseguir reduccions de massa i volum m\u00e9s grans i\/o estadis superiors d\u2019estabilitzaci\u00f3 \/higienitzaci\u00f3 de la fracci\u00f3 org\u00e0nica.<\/p>\n
AREMA disposa d\u2019experi\u00e8ncia en la realitzaci\u00f3 de tots aquests tipus de tractament i selecciona els processos d\u2019estabilitzaci\u00f3 adequats segons el potencial dels fangs produ\u00efts en cada cas o segons els requeriments del client, tal que millor s\u2019ajusti a les necessitats presentades.<\/p>\n
<\/p>\n
La digesti\u00f3 dels fangs, quan es realitza per via anaer\u00f2bia, produeix biog\u00e0s, una barreja de gasos inflamables (met\u00e0 fonamentalment) i contaminants. El biog\u00e0s es pot aprofitar com a font per produir energia, tant en forma d\u2019energia t\u00e8rmica com d\u2019electricitat, utilitzant-la aix\u00ed pel propi consum de la planta o per a un tercer, sempre i quan la inversi\u00f3 resulti viable econ\u00f2micament.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n
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\n\n\n\n\n\n DESHIDRATACI\u00d3\u00a0\u00a0<\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n
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\n\n\n\n\n\nAmb l\u2019objectiu d\u2019afavorir el proc\u00e9s de deshidrataci\u00f3 del fang, un cop estabilitzat, es realitza l\u2019anomenat condicionament del fang. Normalment s\u2019utilitza l\u2019addici\u00f3 de productes qu\u00edmics, encara que si es requereix, es pot utilitzar un tractament t\u00e8rmic.<\/p>\n
<\/p>\n
El condicionament qu\u00edmic d\u00f3na com a resultat la coagulaci\u00f3-floculaci\u00f3 dels s\u00f2lids i l\u2019alliberaci\u00f3 de l\u2019aigua absorbida pels fangs, afavorint el tractament posterior de deshidrataci\u00f3. Els productes qu\u00edmics m\u00e9s utilitzats s\u00f3n clorur f\u00e8rric, cal\u00e7, sulfat d\u2019alumini i pol\u00edmers inorg\u00e0nics.<\/p>\n
<\/p>\n
La deshidrataci\u00f3 separa el contingut d\u2019aigua en els fangs mitjan\u00e7ant procediments mec\u00e0nics, disminuint el volum final de fangs obtingut, facilitant-ne la manipulaci\u00f3 i reduint aix\u00ed els costos derivats de la seva disposici\u00f3 i transport. Els tractaments m\u00e9s utilitzats s\u00f3n els m\u00e8todes mec\u00e0nics com la centrifugaci\u00f3, la filtraci\u00f3 a pressi\u00f3 i la filtraci\u00f3 al buit. El nivell de deshidrataci\u00f3 a assolir dependr\u00e0 del dest\u00ed final que tinguin aquests fangs.<\/p>\n
<\/p>\n
Els llots o fangs de depuraci\u00f3, ja sigui procedent d\u2019estacions d\u2019aig\u00fces residuals urbanes o d\u2019industrials, tenen la seva pr\u00f2pia legislaci\u00f3, que es fonamenta principalment en el seu contingut en metalls pesants i pat\u00f2gens. Cada tipus de destinaci\u00f3 \u00e9s regulada per normatives de rang i abast diferent i requereix unes condicions t\u00e8cniques diferents en els fangs que s\u00f3n subjecte d\u2019actuaci\u00f3.<\/p>\n
<\/p>\n
Un cop deshidratats, aquests fangs poden ser tractats com a residu s\u00f2lid urb\u00e0, poden ser incinerats, reutilitzats en l\u2019agricultura com a fertilitzants o esmena; utilitzats en aplicacions forestals i recuperaci\u00f3 de terrenys marginals i incl\u00fas emprats com a mat\u00e8ria primera en la fabricaci\u00f3 de materials de construcci\u00f3.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n
[\/vc_column_text][vc_empty_space height=”20px”][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”two_columns”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”647″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”629″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”two_columns”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”635″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”641″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” css=”.vc_custom_1603728460117{background-color: #ffffff !important;}” z_index=””][vc_column][vc_empty_space height=”80px”][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"
[vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1605006850016{background-image: url(https:\/\/arema.com\/wp-content\/uploads\/2020\/11\/FANGS-2.jpg?id=573) !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][vc_empty_space height=”80px”][qode_elements_holder number_of_columns=”one_column”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.8)” item_padding=”20px 20px 20px 20px”][vc_empty_space height=”50px”][vc_column_text] Les fraccions separades en els decantadors (primaris i secundaris) de les depuradores s\u2019anomenen fangs o llots de depuraci\u00f3. Aquestes s\u00f3n l\u00edquides, amb…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"full_width.php","meta":{"footnotes":""},"class_list":["post-552","page","type-page","status-publish","hentry"],"yoast_head":"\n
FANGS fraccions separades en els decantadors de depuradores - Arema<\/title>\n<meta name=\"description\" content=\"Les fraccions separades en els decantadors (primaris i secundaris) de les depuradores s\u2019anomenen fangs o llots de depuraci\u00f3.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/arema.com\/ca\/fangs\/\" \/>\n<meta property=\"og:locale\" content=\"ca_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"FANGS fraccions separades en els decantadors de depuradores - Arema\" \/>\n<meta property=\"og:description\" content=\"Les fraccions separades en els decantadors (primaris i secundaris) de les depuradores s\u2019anomenen fangs o llots de depuraci\u00f3.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/arema.com\/ca\/fangs\/\" \/>\n<meta property=\"og:site_name\" content=\"Arema\" \/>\n<meta property=\"article:modified_time\" content=\"2020-11-13T09:59:37+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.rubau.com\/wp-content\/themes\/rubau\/img\/filet-blanc.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Temps estimat de lectura\" \/>\n\t<meta name=\"twitter:data1\" content=\"9 minuts\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/arema.com\/ca\/fangs\/\",\"url\":\"https:\/\/arema.com\/ca\/fangs\/\",\"name\":\"FANGS fraccions separades en els decantadors de depuradores - 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Els fangs se sotmeten a diferents processos, amb la finalitat de r<\/span>eduir-ne la massa i el volum, <\/span>estabilitzar-ne la fracci\u00f3 org\u00e0nica, h<\/span>igienitzar el material i a<\/span>dequar-ne les caracter\u00edstiques als usos o destinacions finals que es plantegin.<\/span><\/p>\n <\/p>\n Els processos realitzats per AREMA que conformen el tractament de fangs s\u00f3n els seg\u00fcents:<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n [\/vc_column_text][vc_empty_space height=”80px”][\/qode_elements_holder_item][\/qode_elements_holder][vc_empty_space height=”80px”][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”one_column”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_empty_space height=”30px”][vc_column_text]<\/p>\n [\/vc_column_text][vc_empty_space height=”50px”][vc_column_text]<\/p>\n L\u2019espessiment \u00e9s el proc\u00e9s mitjan\u00e7ant el qual incrementem el contingut de s\u00f2lids del fang per eliminar part de la fracci\u00f3 l\u00edquida. La reducci\u00f3 de volum de fangs que s\u2019aconsegueix pot suposar una cinquena part del volum original.<\/p>\n <\/p>\n Aquesta reducci\u00f3 en volum millora la gesti\u00f3 dels posteriors tractaments reduint la capacitat necess\u00e0ria de tancs i equips mec\u00e0nics aix\u00ed com la reducci\u00f3 dels requeriments qu\u00edmics pel condicionament i el volum de fang a manipular.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n [\/vc_column_text][vc_empty_space height=”20px”][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”two_columns”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”581″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”587″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”one_column”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_empty_space height=”30px”][vc_column_text]<\/p>\n [\/vc_column_text][vc_empty_space height=”50px”][vc_column_text]<\/p>\n Els processos d\u2019estabilitzaci\u00f3 permeten reduir, inhibir o eliminar el potencial de putrefacci\u00f3 que tenen els fangs degut a la presencia de mat\u00e8ria org\u00e0nica. Simult\u00e0niament se\u2019n redueixen els nivells de pat\u00f2gens i se\u2019n eliminen les olors desagradables. Les t\u00e8cniques d\u2019estabilitzaci\u00f3 de la fracci\u00f3 org\u00e0nica dels fangs es poden agrupar en sistemes biol\u00f2gics i sistemes qu\u00edmics.<\/p>\n <\/p>\n Els principals sistemes d\u2019estabilitzaci\u00f3 biol\u00f2gica es coneixen com a digestions (aer\u00f2bies o anaer\u00f2bies, segons es desenvolupin en presencia o abs\u00e8ncia d\u2019oxigen, respectivament). El sistema cl\u00e0ssic d\u2019estabilitzaci\u00f3 qu\u00edmica consisteix en la barreja del fang amb la cal\u00e7.<\/p>\n Els fangs tamb\u00e9 es poden tractar per altres vies f\u00edsiques (assecatge t\u00e8rmic) o biol\u00f2giques (compostatge) per a aconseguir reduccions de massa i volum m\u00e9s grans i\/o estadis superiors d\u2019estabilitzaci\u00f3 \/higienitzaci\u00f3 de la fracci\u00f3 org\u00e0nica.<\/p>\n AREMA disposa d\u2019experi\u00e8ncia en la realitzaci\u00f3 de tots aquests tipus de tractament i selecciona els processos d\u2019estabilitzaci\u00f3 adequats segons el potencial dels fangs produ\u00efts en cada cas o segons els requeriments del client, tal que millor s\u2019ajusti a les necessitats presentades.<\/p>\n <\/p>\n La digesti\u00f3 dels fangs, quan es realitza per via anaer\u00f2bia, produeix biog\u00e0s, una barreja de gasos inflamables (met\u00e0 fonamentalment) i contaminants. El biog\u00e0s es pot aprofitar com a font per produir energia, tant en forma d\u2019energia t\u00e8rmica com d\u2019electricitat, utilitzant-la aix\u00ed pel propi consum de la planta o per a un tercer, sempre i quan la inversi\u00f3 resulti viable econ\u00f2micament.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n [\/vc_column_text][vc_empty_space height=”20px”][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”two_columns”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”593″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”599″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”one_column”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_empty_space height=”30px”][vc_column_text]<\/p>\n [\/vc_column_text][vc_empty_space height=”50px”][vc_column_text]<\/p>\n Amb l\u2019objectiu d\u2019afavorir el proc\u00e9s de deshidrataci\u00f3 del fang, un cop estabilitzat, es realitza l\u2019anomenat condicionament del fang. Normalment s\u2019utilitza l\u2019addici\u00f3 de productes qu\u00edmics, encara que si es requereix, es pot utilitzar un tractament t\u00e8rmic.<\/p>\n <\/p>\n El condicionament qu\u00edmic d\u00f3na com a resultat la coagulaci\u00f3-floculaci\u00f3 dels s\u00f2lids i l\u2019alliberaci\u00f3 de l\u2019aigua absorbida pels fangs, afavorint el tractament posterior de deshidrataci\u00f3. Els productes qu\u00edmics m\u00e9s utilitzats s\u00f3n clorur f\u00e8rric, cal\u00e7, sulfat d\u2019alumini i pol\u00edmers inorg\u00e0nics.<\/p>\n <\/p>\n La deshidrataci\u00f3 separa el contingut d\u2019aigua en els fangs mitjan\u00e7ant procediments mec\u00e0nics, disminuint el volum final de fangs obtingut, facilitant-ne la manipulaci\u00f3 i reduint aix\u00ed els costos derivats de la seva disposici\u00f3 i transport. Els tractaments m\u00e9s utilitzats s\u00f3n els m\u00e8todes mec\u00e0nics com la centrifugaci\u00f3, la filtraci\u00f3 a pressi\u00f3 i la filtraci\u00f3 al buit. El nivell de deshidrataci\u00f3 a assolir dependr\u00e0 del dest\u00ed final que tinguin aquests fangs.<\/p>\n <\/p>\n Els llots o fangs de depuraci\u00f3, ja sigui procedent d\u2019estacions d\u2019aig\u00fces residuals urbanes o d\u2019industrials, tenen la seva pr\u00f2pia legislaci\u00f3, que es fonamenta principalment en el seu contingut en metalls pesants i pat\u00f2gens. Cada tipus de destinaci\u00f3 \u00e9s regulada per normatives de rang i abast diferent i requereix unes condicions t\u00e8cniques diferents en els fangs que s\u00f3n subjecte d\u2019actuaci\u00f3.<\/p>\n <\/p>\n Un cop deshidratats, aquests fangs poden ser tractats com a residu s\u00f2lid urb\u00e0, poden ser incinerats, reutilitzats en l\u2019agricultura com a fertilitzants o esmena; utilitzats en aplicacions forestals i recuperaci\u00f3 de terrenys marginals i incl\u00fas emprats com a mat\u00e8ria primera en la fabricaci\u00f3 de materials de construcci\u00f3.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n [\/vc_column_text][vc_empty_space height=”20px”][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”two_columns”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”647″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”629″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1603728384436{background-color: #ffffff !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″ css=”.vc_custom_1603728390503{background-color: #ffffff !important;}”][qode_elements_holder number_of_columns=”two_columns”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”635″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.01)”][vc_single_image image=”641″ img_size=”full” alignment=”center” style=”vc_box_shadow” qode_css_animation=””][\/qode_elements_holder_item][\/qode_elements_holder][\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” css=”.vc_custom_1603728460117{background-color: #ffffff !important;}” z_index=””][vc_column][vc_empty_space height=”80px”][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":" [vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”grid” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern” z_index=”” css=”.vc_custom_1605006850016{background-image: url(https:\/\/arema.com\/wp-content\/uploads\/2020\/11\/FANGS-2.jpg?id=573) !important;}”][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][vc_empty_space height=”80px”][qode_elements_holder number_of_columns=”one_column”][qode_elements_holder_item advanced_animations=”no” background_color=”rgba(255,255,255,0.8)” item_padding=”20px 20px 20px 20px”][vc_empty_space height=”50px”][vc_column_text] Les fraccions separades en els decantadors (primaris i secundaris) de les depuradores s\u2019anomenen fangs o llots de depuraci\u00f3. Aquestes s\u00f3n l\u00edquides, amb…<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"full_width.php","meta":{"footnotes":""},"class_list":["post-552","page","type-page","status-publish","hentry"],"yoast_head":"\n ESPESSIMENT\u00a0 <\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n ESTABILITZACI\u00d3\u00a0\u00a0<\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n DESHIDRATACI\u00d3\u00a0\u00a0<\/h4>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n