{"id":1874,"date":"2014-11-04T09:48:37","date_gmt":"2014-11-04T09:48:37","guid":{"rendered":"http:\/\/boer.it\/?page_id=1874"},"modified":"2018-10-01T07:42:11","modified_gmt":"2018-10-01T07:42:11","slug":"anaerobic-biological-filters","status":"publish","type":"page","link":"https:\/\/boer.it\/en\/water-treatment-plants\/anaerobic-biological-filters\/","title":{"rendered":"Anaerobic biological filters"},"content":{"rendered":"<section  class='av_textblock_section av-jmpzkje4-664168f51ae192e9dccab61b7cdd6c81 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><h1 class=\"titles\"><span class=\"titleFirst\">Anaerobic<\/span><span class=\"titleSecond\">biological filters<\/span><\/h1>\n<\/div><\/section>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>Anaerobic biological filters are used in the treatment stage following waste water first anaerobic purification in the Imhoff tank and initial degreasing in the grease condensation chamber. The process hence includes the following steps:<\/p>\n<ul>\n<li>primary decantation in the Imhoff well and degreasing in the grease condensation tank<\/li>\n<li>anaerobic bacterial treatment<\/li>\n<\/ul>\n<p>The volumes considered for sizing were calculated compliant with the standards set forth by Emilia Romagna Region ARPA (Regional Environmental Protection Agency) and with the plastic components yield ratio provided by the manufacturer of the plastic filter material.<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_hr-2683186cf6c434c3fdebf44adb9dc21f\">\n#top .hr.hr-invisible.av-av_hr-2683186cf6c434c3fdebf44adb9dc21f{\nheight:20px;\n}\n<\/style>\n<div  class='hr av-av_hr-2683186cf6c434c3fdebf44adb9dc21f hr-invisible  avia-builder-el-2  el_after_av_textblock  el_before_av_one_half '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<div  class='flex_column av-av_one_half-2a9015ff38129c418a3f2eafba3e9512 av_one_half  avia-builder-el-3  el_after_av_hr  el_before_av_one_half  first flex_column_div  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-d492b05d5f16ad236b9a79f4eca7d370\">\n.avia-image-container.av-av_image-d492b05d5f16ad236b9a79f4eca7d370 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-d492b05d5f16ad236b9a79f4eca7d370 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-d492b05d5f16ad236b9a79f4eca7d370 av-styling- avia-align-center  avia-builder-el-4  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici.jpg\" data-srcset=\"https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici.jpg 768w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-80x80.jpg 80w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-300x300.jpg 300w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-36x36.jpg 36w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-180x180.jpg 180w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-705x705.jpg 705w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-120x120.jpg 120w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-450x450.jpg 450w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" class='avia_image'  aria-label='Anaerobic biological filters'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-2561 avia-img-lazy-loading-not-2561 avia_image ' src=\"https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici.jpg\" alt='Anaerobic biological filters' title='Anaerobic biological filters'  height=\"768\" width=\"768\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici.jpg 768w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-80x80.jpg 80w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-300x300.jpg 300w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-36x36.jpg 36w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-180x180.jpg 180w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-705x705.jpg 705w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-120x120.jpg 120w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici-450x450.jpg 450w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/a><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_half-862f0c8b97abc46405e90743a1c7ee0e\">\n.flex_column.av-av_one_half-862f0c8b97abc46405e90743a1c7ee0e{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_one_half-862f0c8b97abc46405e90743a1c7ee0e av_one_half  avia-builder-el-5  el_after_av_one_half  el_before_av_hr  flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-ccbfbf3013a9c8d5a4a056baef6e1d4f\">\n.avia-image-container.av-av_image-ccbfbf3013a9c8d5a4a056baef6e1d4f img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-ccbfbf3013a9c8d5a4a056baef6e1d4f .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-ccbfbf3013a9c8d5a4a056baef6e1d4f av-styling- avia-align-center  avia-builder-el-6  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno.jpg\" data-srcset=\"https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno.jpg 768w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-80x80.jpg 80w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-300x300.jpg 300w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-36x36.jpg 36w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-180x180.jpg 180w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-705x705.jpg 705w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-120x120.jpg 120w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-450x450.jpg 450w\" data-sizes=\"(max-width: 768px) 100vw, 768px\" class='avia_image'  aria-label='Anaerobic biological filters'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-2534 avia-img-lazy-loading-not-2534 avia_image ' src=\"https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno.jpg\" alt='Anaerobic biological filters' title='Anaerobic biological filters'  height=\"768\" width=\"768\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno.jpg 768w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-80x80.jpg 80w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-300x300.jpg 300w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-36x36.jpg 36w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-180x180.jpg 180w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-705x705.jpg 705w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-120x120.jpg 120w, https:\/\/boer.it\/wp-content\/uploads\/2014\/06\/filtri_biologici_anaerobici_disegno-450x450.jpg 450w\" sizes=\"(max-width: 768px) 100vw, 768px\" \/><\/a><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_hr-ee2847e2e025ce3d30801259a03f9fd4\">\n#top .hr.hr-invisible.av-av_hr-ee2847e2e025ce3d30801259a03f9fd4{\nheight:10px;\n}\n<\/style>\n<div  class='hr av-av_hr-ee2847e2e025ce3d30801259a03f9fd4 hr-invisible  avia-builder-el-7  el_after_av_one_half  el_before_av_heading '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-bbc48871500c1989f3003c71a17cda45\">\n#top .av-special-heading.av-av_heading-bbc48871500c1989f3003c71a17cda45{\npadding-bottom:10px;\nfont-size:24px;\n}\nbody .av-special-heading.av-av_heading-bbc48871500c1989f3003c71a17cda45 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-av_heading-bbc48871500c1989f3003c71a17cda45 .av-special-heading-tag{\nfont-size:24px;\n}\n.av-special-heading.av-av_heading-bbc48871500c1989f3003c71a17cda45 .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-av_heading-bbc48871500c1989f3003c71a17cda45 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-av_heading-bbc48871500c1989f3003c71a17cda45 .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-bbc48871500c1989f3003c71a17cda45 av-special-heading-h3 blockquote modern-quote  avia-builder-el-8  el_after_av_hr  el_before_av_textblock  av-inherit-size'><h3 class='av-special-heading-tag'  itemprop=\"headline\"  >Process description<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p><span class=\"indice\">PRIMARY DECANTATION<\/span> The Imhoff primary decantation tank is installed to treat rough foreign bodies, easily settleable substances and floating material.<\/p>\n<p>It is designed to house two separate areas \u2013 upper for decantation and lower for organic substance anaerobic digestion \u2013 which produce a partially clarified effluent with around 30% &#8211; 35% pollutant load reduction.<\/p>\n<p><span class=\"indice\">ANAEROBIC BACTERIAL FILTER<\/span> Due to gravity, the clarified water flows into the anaerobic digestion tank.<\/p>\n<p>Such tank contains sewage-proof, chemically inert plastic fills unable to influence the purification process. The anoxic conditions that develop in the hollows of such elements promote the growth of anaerobic bacterial flora.<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-cedaaa6ccceb19852effb0ed37dcbe1a\">\n#top .av-special-heading.av-av_heading-cedaaa6ccceb19852effb0ed37dcbe1a{\npadding-bottom:5px;\nfont-size:24px;\n}\nbody .av-special-heading.av-av_heading-cedaaa6ccceb19852effb0ed37dcbe1a .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-av_heading-cedaaa6ccceb19852effb0ed37dcbe1a .av-special-heading-tag{\nfont-size:24px;\n}\n.av-special-heading.av-av_heading-cedaaa6ccceb19852effb0ed37dcbe1a .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-av_heading-cedaaa6ccceb19852effb0ed37dcbe1a .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-av_heading-cedaaa6ccceb19852effb0ed37dcbe1a .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-cedaaa6ccceb19852effb0ed37dcbe1a av-special-heading-h3 blockquote modern-quote  avia-builder-el-10  el_after_av_textblock  el_before_av_textblock  av-inherit-size'><h3 class='av-special-heading-tag'  itemprop=\"headline\"  >Running and maintenance<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The system does not include electromechanical devices, hence maintenance is cut-down to settled sludge removal (once to twice a year).<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-9d38892e128a52a3983d994df1a278bc\">\n#top .av-special-heading.av-av_heading-9d38892e128a52a3983d994df1a278bc{\npadding-bottom:5px;\nfont-size:24px;\n}\nbody .av-special-heading.av-av_heading-9d38892e128a52a3983d994df1a278bc .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-av_heading-9d38892e128a52a3983d994df1a278bc .av-special-heading-tag{\nfont-size:24px;\n}\n.av-special-heading.av-av_heading-9d38892e128a52a3983d994df1a278bc .av-subheading{\nfont-size:15px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-av_heading-9d38892e128a52a3983d994df1a278bc .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-av_heading-9d38892e128a52a3983d994df1a278bc .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-9d38892e128a52a3983d994df1a278bc av-special-heading-h3 blockquote modern-quote  avia-builder-el-12  el_after_av_textblock  el_before_av_textblock  av-inherit-size'><h3 class='av-special-heading-tag'  itemprop=\"headline\"  > Technical features<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The system is made up of a single reinforced concrete chamber partly filled with plastic elements. The remaining space above such volume is reserved to water clarification, while the room below the same is where digested sludge settles and incoming waste water flows in. Water seeps through the fills bottom to top.<\/p>\n<p><span class=\"indice\">PLASTIC FILLS<\/span><\/p>\n<p>The plastic fills used in this system are spherical, with around 9 cm diameter and usable area corresponding to 135 m\u00b2\/m\u00b3 with 96% clear volume, against the 50-100 m\u00b2\/m\u00b3\u00a0surface and 40% hollow found in stone.<\/p>\n<p>The high hollow ratio guarantees better waste water recirculation and lowers the risk the bottom of the tank is clogged due to excessive film growth. In addition, the special shape and plastic composition of the material ensure adequate waste water retention time.<\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_hr-2683186cf6c434c3fdebf44adb9dc21f\">\n#top .hr.hr-invisible.av-av_hr-2683186cf6c434c3fdebf44adb9dc21f{\nheight:20px;\n}\n<\/style>\n<div  class='hr av-av_hr-2683186cf6c434c3fdebf44adb9dc21f hr-invisible  avia-builder-el-14  el_after_av_textblock  el_before_av_button '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<div  class='avia-button-wrap av-av_button-c7f509ac2199b2f06d710d67852c7fdf-wrap avia-button-left  avia-builder-el-15  el_after_av_hr  avia-builder-el-last '><a href='http:\/\/boer.it\/wp-content\/uploads\/2014\/11\/13_anaerobic_biological_filters.pdf'  class='avia-button av-av_button-c7f509ac2199b2f06d710d67852c7fdf avia-icon_select-yes-left-icon avia-size-small avia-position-left avia-color-theme-color-subtle'  ><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue823' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >Technical Data Sheet PDF<\/span><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":1711,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-1874","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/pages\/1874","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/comments?post=1874"}],"version-history":[{"count":2,"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/pages\/1874\/revisions"}],"predecessor-version":[{"id":4624,"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/pages\/1874\/revisions\/4624"}],"up":[{"embeddable":true,"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/pages\/1711"}],"wp:attachment":[{"href":"https:\/\/boer.it\/en\/wp-json\/wp\/v2\/media?parent=1874"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}