[et_pb_section fb_built=”1″ fullwidth=”on” _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_fullwidth_header _builder_version=”4.17.4″ _module_preset=”default” background_enable_color=”off” background_image=”https:\/\/astfilters.com\/wastewater\/wp-content\/uploads\/sites\/2\/2022\/07\/bod-removal-header-scaled.jpg” height=”235px” max_height=”235px” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_fullwidth_header][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.21.0″ _module_preset=”default” custom_padding=”0px||20px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.18.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.18.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.18.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n
[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.18.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.18.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” sticky_enabled=”0″]<\/p>\n
The MBBR and the Floating Bead Filter are both plastic floating media biofilters that can eliminate soluble Biological Oxygen Demand (BOD) from the system. \u00a0These filters are widely used in aerobic treatment and can be redesigned to function in an anaerobic format for denitrification. The term \u201cC\/N\u201d ratio refers to the ratio of organic carbon to ammonia in a nitrifying filter.\u00a0 This defines the relative abundance of heterotrophic and nitrifying that can be expected in a biofiltration operation.\u00a0 Often estimated by the BOD5<\/sub>\/ammonia ratio, a high C\/N indicates excessive heterotroph growth, which can suppress the development of a healthy nitrifying biofilm.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.21.0″ _module_preset=”default” max_width=”800px” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”1_2″ _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/astfilters.com\/wastewater\/wp-content\/uploads\/sites\/2\/2023\/10\/mbbr.jpg” title_text=”mbbr” show_in_lightbox=”on” _builder_version=”4.22.2″ _module_preset=”default” box_shadow_style=”preset1″ global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n MBBR Filter<\/em><\/p>\n [\/et_pb_text][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_image src=”https:\/\/astfilters.com\/wastewater\/wp-content\/uploads\/sites\/2\/2023\/10\/Ammonia-Treatment-1.2-MGD-Georgia.jpg” title_text=”Ammonia-Treatment-1.2-MGD-Georgia” show_in_lightbox=”on” _builder_version=”4.22.2″ _module_preset=”default” box_shadow_style=”preset1″ global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.22.2″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n AST Filter: Ammonia Treatment 1.2 MGD, Georgia<\/em><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.18.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.18.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” sticky_enabled=”0″]<\/p>\n MBBR<\/strong> systems are fixed film bioreactors that use a moving bed of support material, typically plastic biocarriers, to grow microorganisms. In aerobic treatment, the biocarriers are constantly mixed by air injection, which keeps the water aerated and provides abrasion to remove excess biofilm.\u00a0 The discharge from the MBBR is screened to contain the biocarriers. Biocarriers tend to be large 10-20 mm to avoid screen clogging.\u00a0 Originally developed for aquaculture applications, they are capable of good rates of conversion of dissolved organics (BOD) and ammonia.\u00a0 They have also successfully applied to domestic and industrial waters.\u00a0 They mimic suspended growth treatment, such as activated sludge.\u00a0 MBBRs are not as sensitive as activated sludge to flow variations and compete best under low-concentration regimes where floc development issues can plague an activated sludge unit. The specific surface areas for most MBBR biocarriers are typically reduced by as much as 50% by over-abrasion of externally exposed surface area, but hull volume to medial volumes is low (about 2). \u00a0Nitrification rates for low ammonia (<1 mg-N\/L) concentration regimes of 300-500 gm\/m3 <\/sup>media-day are common and conversions of 1 kg-N\/m3 <\/sup>media-day are achievable with low C\/N and higher ammonia concentrations.\u00a0 Internally protected surface area is poorly abraded under heavy organic loading so the MBBR should always be protected by aggressive solids removal to lower organic loading (lower C\/N ratios).\u00a0 MBBRs constantly shed solids and are normally followed by a solids capture device.<\/p>\n Floating Bead Filters<\/strong> are granular filters that use a static bed low-density plastic (specific gravity <0.92) media bed to filter up flowing water.\u00a0 The media (typically 2-3 mm) is retained by an overlying screen.\u00a0 When used as a clarifier, the media captures suspended solids by the same mechanisms as a sand filter (micro-scale settling, interception, or surface adsorption).\u00a0 The units also effectively operate as fixed film bioreactors, particularly when charged with plastic biocarriers that have been shaped to improve porosity and provide biofilm protection.\u00a0 Floating bead filters that are designed to function as a biofilter inherently capture suspended solids and are referred to as bioclarifiers since they perform a dual function.\u00a0 Floating bead filters have about twice the effective surface area (all external) as an MBBR, reflecting the smaller media size, but the hull-media ratio is moderate at about 3-4. \u00a0Nitrification rates for low-concentration regimes (<1 mg\/L) are typically 800-1000 g-N\/m3<\/sup> media-day, and triple that rate is achievable with higher concentration and good backwash management.\u00a0 Modern floating bead filters are washed pneumatically (with bubbles) that have been shown to \u201cgently\u201d wash the bead surface to minimize biofilm damage.\u00a0 Backwashing is timed (1-6 times daily) to match the loading regime while maintaining optimum levels of oxygen delivery, ammonia transport, and turbulence in the bed.\u00a0 Backflushing scours excessive bacteria off the outer layers of the biofilm, creating ideal conditions for diffusion of critical nutrients to nitrifying populations that normally reside close to the biocarrier surface. Backwashing effectively mitigates the negative impact of organics (particulate and dissolved), so floating bead bioclarifiers are not sensitive to C\/N ratios since they selectively harvest heterotrophic growths during backwashing. These bioclarifiers internally remove excess biofilm and do not need to be followed by a particulate removal device. \u00a0Aerobic units tend to support higher flowrates to transport oxygen.\u00a0 Anoxic HPPG (or Propellor-washed) units are characterized by low flows as the bed is often used to deoxygenate the waste flow to create the ideal redox conditions for denitrifying.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_button button_url=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF9saW5rX3VybF9wYWdlIiwic2V0dGluZ3MiOnsicG9zdF9pZCI6IjQwOCJ9fQ==@” button_text=”Request a No Cost Consultation” button_alignment=”center” _builder_version=”4.21.0″ _dynamic_attributes=”button_url” _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.21.0″ _module_preset=”default” background_color=”gcid-39085902-be09-48a0-b83b-8530c7790998″ global_colors_info=”{%22gcid-39085902-be09-48a0-b83b-8530c7790998%22:%91%22background_color%22%93}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” sticky_enabled=”0″]<\/p>\n There are three different Floating Bead Filter models that dominate commercial-scale operation.\u00a0 The Propeller-washed (PBF) format cleans beads by the action of a set of embedded propellors.\u00a0 This is the original AST format.\u00a0 The newer High Profile PolyGeyser (HPPG) employs pneumatic backwashing, which simplifies operations and moderates\u2019 abrasion during backwashing.\u00a0 For all practical purposes, the PBF and HPPG are interchangeable and both lack the internal aeration to make them effective as aerobic bioclarifiers. \u00a0They are single-pass units designed primarily as clarifiers.\u00a0 They can be linked to an external aerated tank to become effective in a bioclarifier mode. For example, they are very effective bioclarifiers when linked to an aerated fish tank in a recirculating mode.\u00a0 The Recirculating PolyGeyser (RCPG) links an internal head tank with an airlift to facilitate the treatment of organic or ammonia-rich waste waters that require very high oxygen demand.\u00a0 The water is rapidly re-aerated and passed through the bed multiple times to achieve the treatment objectives.\u00a0 \u00a0The RCPG can replace an MBBR and its associated clarifiers. The HPPG and PBF are normally used to support an MBBR, replacing one or both of the associated MBBR clarifiers.<\/p>\n The vast majority of MBBR and Floating Bead Filter units are operated aerobically. The principal difference between the MBBR and the family of Floating Bead Filters is the operational mode of the bed.\u00a0 The MBBR operates continually mixed, and the Floating Bead Filter beds do not move during filtration.\u00a0 Thus, the Floating Bead Filters inherently capture suspended solids while the MBBR generates them. MBBR abrasion is continuous and intermittent in the Floating Bead Filter.\u00a0 Both use a plastic biocarrier.\u00a0 MBBR media floats or is neutrally buoyant. \u00a0Floating bead filters always use a floating plastic, typically low-density polyethylene, with a specific gravity <0.92.\u00a0 The MBBR, HPPG, and MBBR are washed pneumatically.\u00a0\u00a0 However, the MBBR is washed all day (86,000 seconds\/day) and the Floating Bead Filter (6-16 seconds daily\/day), so they operate in totally difference biofilm abrasion regimes. \u00a0Changing the backflush frequency in an RCPG or HPPG adjusts the biofilm abrasion rate. The MBBR operates at an aggressive and fixed abrasion rate. \u00a0\u00a0The PBF is aggressively washed by the propellor at 1750 rpm for 15-30 seconds (1-2 backwashes daily) per day when used as a bioclarifier.\u00a0 Increasing the duration or frequency of PBF backwashing usually over-abrades the biofilm.<\/p>\n <\/p>\n MBBR (Moving Bed Biofilm Reactor):<\/strong><\/p>\n Floating Bead Filters:<\/strong><\/p>\n <\/strong><\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.21.0″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” hover_enabled=”0″ global_colors_info=”{}” theme_builder_area=”post_content” sticky_enabled=”0″]<\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/astfilters.com\/wastewater\/wp-content\/uploads\/sites\/2\/2023\/12\/interfacing-with-mbbr-diagram.png” _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” title_text=”interfacing-with-mbbr-diagram” show_in_lightbox=”on” align=”center” hover_enabled=”0″ sticky_enabled=”0″][\/et_pb_image][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n Figure 1: The core of most domestic treatment follows a classical treatment sequence.<\/em><\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n The classical treatment sequence for treatment of domestic waste is a four-step process (Figure 1).\u00a0 First, suspended solids are removed, reducing the organic loading by about 40%.\u00a0 Then, a biofilter, in this illustration an MBBR, converts dissolved organics to bacteria biomass. Then, a second clarifier, the secondary clarifier, removes the particulate biomass.\u00a0 Finally, for many modern facilities, the wastewater stream is then nitrified before it passes on to the disinfection system.\u00a0 It is a very effective approach that forms a baseline for many variants.<\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/astfilters.com\/wastewater\/wp-content\/uploads\/sites\/2\/2023\/12\/hppg-floating-bead-filter-figure-2.png” _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” title_text=”hppg-floating-bead-filter-figure-2″ show_in_lightbox=”on” align=”center” hover_enabled=”0″ sticky_enabled=”0″][\/et_pb_image][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n Figure 2: The HPPG floating bead filter can be used to supplement or replace, the secondary clarifier, the primary clarifier, or both.<\/em><\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n For example, Figure 2 illustrates how an HPPG can be used to replace either the primary clarifier, the secondary clarifier, or both.\u00a0\u00a0 The replacement of the secondary clarifier is a straightforward substitution motivated by the need to further polish the suspended solids in the effluent or to conserve space.\u00a0 An HPPG or PBF clarifier requires 1\/40th of the area as a settling basin. \u00a0The replacement of the primary settling system may be motivated by the desire to take advantage of the fine solids capture ability of the Floating Bead Filter to lower the C\/N ratio entering the MBBR to improve the nitrification rate. \u00a0\u00a0However, this substitution would result in some loss of flow equalization and may complicate sludge handling for the facility.<\/p>\n [\/et_pb_text][et_pb_image src=”data:image\/svg+xml;base64,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” _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″ align=”center” show_in_lightbox=”on”][\/et_pb_image][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n Figure 3: Alternately an RCPG bioclarifier can be used to polish the MBBR effluent or provide a pretreatment to the MBBR allowing it to be reduced in size.<\/em><\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n As Figure 3 illustrates, the treatment power of the RCPG bioclarifier can be used to polish the MBBR effluent or to provide pretreatment for the MBBR by removing organic solids, oxidizing soluble organics, removing the biomass produced, and nitrifying. \u00a0The MBBR biofiltration contribution can facilitate a significant reduction in MBBR sizing, while the substantial reduction in the C\/N ratio realized will contribute to the MBBR’s ability to nitrify.<\/p>\n [\/et_pb_text][et_pb_image src=”https:\/\/astfilters.com\/wastewater\/wp-content\/uploads\/sites\/2\/2023\/12\/rcpg-as-a-solution.png” _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” title_text=”rcpg-as-a-solution” hover_enabled=”0″ sticky_enabled=”0″ show_in_lightbox=”on” align=”center”][\/et_pb_image][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n Figure 4: The RCPG bioclarifier can be used aa a total solution replacing all the core components and with the addition of a coarse screening pretreatment and disinfection provide a treatment solution for an application.<\/em><\/p>\n [\/et_pb_text][et_pb_text _builder_version=”4.23.1″ _module_preset=”default” theme_builder_area=”post_content” hover_enabled=”0″ sticky_enabled=”0″]<\/p>\n Ultimately, the RCPG bioclarifier can be used to replace the entire traditional domestic wastewater treatment train core.\u00a0 A single unit sized to treat a small industrial or rural domestic discharge.\u00a0 This approach can reduce demands for staffing,\u00a0 treatment area and\u00a0 capital investment.<\/p>\n <\/p>\n <\/p>\n A single pass HPPG\/PBF and MBBR are often paired.\u00a0 Here, the HPPG\/PBF receives all its oxygen as dissolved oxygen in the influent water stream.\u00a0 Since oxygen saturation typically limits the amount of oxygen delivered, barely 1 mg-N\/L of ammonia can be oxidized before the oxygen is depleted and nitrifying stops, reducing the HPPG to a clarifier only format.\u00a0\u00a0 Only when the HPPG is utilized in recirculating format does it display significant (aerobic)\u00a0 biological capability. \u00a0Either the HPPG or PBF can effectively reduce the suspended solids load, and thus the C\/N ratio for the MBBR allowing it to operate with a thinner, more efficient biofilm thickness.<\/p>\n Although the MBBR and the RCPG floating bead filter may appear to be comparable, they are distinctive and potentially complementary technologies.\u00a0 They both use plastic biocarriers, but the MBBR operates with continuous mixing and abrasion.\u00a0 The Floating Bead Filter operates with a floating plastic media bed that is static for the vast majority of the time and is only mixed a few times a day when solids removal and biofilm abrasion is required. The Floating Bead Filter always acts as a clarifier, removing suspended solids. The RCPG is configured by media selection and internal airlift recirculation also to be an excellent fixed film biofilter, the zone of overlap for the two technologies.\u00a0 An MBBR is just a biofilter; the RCPG integrates the solids capture and removal solids mechanisms into a format that can be reduced to an excellent biofilter, but is capable of replacing the entire treatment train whenever costs treatment objectives, or secondary constraints. They can also be used in a complementary manner to enhance MBBR performance by polishing the effluent for BOD, ammonia, and solids or as a pretreatment to reduce organic loading.<\/p>\n [\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section][et_pb_section fb_built=”1″ custom_padding_last_edited=”on|phone” _builder_version=”4.14.7″ _module_preset=”default” custom_margin=”20px||50px||false|false” custom_padding=”0px||0px||false|false” custom_padding_tablet=”0px||0px||false|false” custom_padding_phone=”|20px||20px|false|false” global_module=”2072″ saved_tabs=”all” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.18.0″ _module_preset=”default” max_width=”900px” module_alignment=”center” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.16″ _module_preset=”default” text_font=”Montserrat||||||||” text_font_size=”20px” header_2_font=”Montserrat|800|||||||” header_2_font_size=”60px” header_2_font_size_tablet=”60px” header_2_font_size_phone=”38px” header_2_font_size_last_edited=”on|phone” header_3_font_size_tablet=”” header_3_font_size_phone=”” header_3_font_size_last_edited=”on|phone” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n From a simple filter to a complete custom system, our engineers can help you find the perfect filtration system for your needs. Get in touch today!<\/p>\n [\/et_pb_text][et_pb_button button_url=”\/wastewater\/request-a-quote\/” button_text=”Request a No Cost Consultation” button_alignment=”center” _builder_version=”4.18.0″ _module_preset=”default” custom_button=”on” button_text_color=”#FFFFFF” button_bg_color=”#78c730″ button_border_color=”#78c730″ button_border_radius=”10px” button_font=”Montserrat||||||||” button_icon=”5||divi||400″ custom_padding=”10px|50px|10px|50px|false|false” button_bg_color_tablet=”gcid-2a80621b-c881-413f-a95d-d732b9552da9″ button_bg_color_phone=”gcid-2a80621b-c881-413f-a95d-d732b9552da9″ button_bg_color_last_edited=”on|desktop” global_colors_info=”{%22gcid-2a80621b-c881-413f-a95d-d732b9552da9%22:%91%22button_bg_color%22,%22button_border_color%22,%22button_bg_color__hover%22,%22button_border_color__hover%22%93}” button_bg_color__hover_enabled=”on|hover” button_bg_color__hover=”#78c730″ button_bg_enable_color__hover=”on” button_border_color__hover_enabled=”on|hover” button_border_color__hover=”#78c730″ theme_builder_area=”post_content”][\/et_pb_button][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":" Moving Bed Biofilm Reactor (MBBR) vs. Bead Filters for Wastewater TreatmentThe MBBR and the Floating Bead Filter are both plastic floating media biofilters that can eliminate soluble Biological Oxygen Demand (BOD) from the system. \u00a0These filters are widely used in aerobic treatment and can be redesigned to function in an anaerobic format for denitrification. The term \u201cC\/N\u201d ratio refers to the ratio of organic carbon to ammonia in a nitrifying filter.\u00a0 This defines the relative abundance of heterotrophic and nitrifying that can be expected in a biofiltration operation.\u00a0 Often estimated by the BOD5\/ammonia ratio, a high C\/N indicates excessive heterotroph growth, which can suppress the development of a healthy nitrifying biofilm.MBBR FilterAST Filter: Ammonia Treatment 1.2 MGD, GeorgiaMBBR systems are fixed film bioreactors that use a moving bed of support material, typically plastic biocarriers, to grow microorganisms. In aerobic treatment, the biocarriers are constantly mixed by air injection, which keeps the water aerated and provides abrasion to remove excess biofilm.\u00a0 The discharge from the MBBR is screened to contain the biocarriers. Biocarriers tend to be large 10-20 mm to avoid screen clogging.\u00a0 Originally developed for aquaculture applications, they are capable of good rates of conversion of dissolved organics (BOD) and […]<\/p>\n","protected":false},"author":6,"featured_media":0,"parent":3199,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","inline_featured_image":false,"footnotes":""},"class_list":["post-3215","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"\n\n
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Interfacing with the MBBR<\/h2>\n
<\/h2>\n
Summary:<\/h2>\n
Let’s Discuss Your Project<\/h2>\n