{"id":10173,"date":"2021-02-17T07:45:49","date_gmt":"2021-02-17T07:45:49","guid":{"rendered":"https:\/\/www.borplastikaeko.al\/?p=10173"},"modified":"2022-09-26T08:56:04","modified_gmt":"2022-09-26T06:56:04","slug":"wastewater-treatment-device","status":"publish","type":"post","link":"https:\/\/www.borplastikaeko.al\/en\/wastewater-treatment-device\/","title":{"rendered":"Determination of key design parameters for MBBR wastewater treatment device"},"content":{"rendered":"<p>[vc_row][vc_column][vc_column_text]The company Bor-plastika is the only company in Croatia that, in cooperation with <strong>INL &#8211; International Iberian Nanotechnology Laboratory from Portugal and JSI &#8211; Jo\u017eef Stefan Institute from Slovenia<\/strong>, improved the current technology for the production of wastewater treatment plants, by incorporating Moving Bed Biofilm Reactor (MBBR) technology into their manufacturing portfolio, to reduce raw material and energy consumption while maintaining or improving the performance of their devices.<\/p>\n<p>The BP MBBR 10 device was designed to treat wastewater for 10 population equivalent (PE). The design is based on BP ASP 10 device with a conventional activated sludge process (suspended biomass) that is already produced by Bor Plastika. This device is to be upgraded into a mini compact wastewater treatment plant with MBBR carriers. The notation of this unit used within this report is BP MBBR 10. The estimated daily amount of input wastewater is 150 l\/PE\/d with a daily BOD load equal to 60 g BOD\/PE\/d. The total daily input wastewater load is thus 1,5 m<sup>3<\/sup>\/d with 0,6 kg BOD\/d.<\/p>\n<p>The MBBR device consists of a primary settling tank, aeration tank, and secondary settling tank. There is no return sludge from the secondary settling tank to the aeration tank as is the case in ASP device. For the MBBR primary and secondary settling tanks, the same volumes are expected for BP MBBR 10 as used for the BP ASP 10 device.[\/vc_column_text]<style type=\"text\/css\" >#t_wapa28g3enjcstx6yceb .table_col {color:#787878; background:#ffffff;}#t_wapa28g3enjcstx6yceb .table_col .table_line_ctn {border:1px solid #ecf0f1;}#t_wapa28g3enjcstx6yceb .table_col .table_line {border-bottom:1px solid #ecf0f1;} <\/style>  \n<!-- Table --><div class=\"rd_table_ctn rd_table_4_col\" id=\"t_wapa28g3enjcstx6yceb\"><div class=\"table_col\"><h3 style=\"background:#00a952; color:#ffffff\">Process unit - MBBR<\/h3><div class=\"table_line_ctn\"><div class=\"table_line\"><p>Primary settler<\/p><\/div><div class=\"table_line\"><p>Aeration tank<\/p><\/div><div class=\"table_line\"><p>Secondary settler<\/p><\/div><\/div><\/div><div class=\"table_col\"><h3 style=\"background:#00a952; color:#ffffff\">Surface (m2)<\/h3><div class=\"table_line_ctn\"><div class=\"table_line\"><p>0.48<\/p><\/div><div class=\"table_line\"><p>0.26<\/p><\/div><div class=\"table_line\"><p>0.54<\/p><\/div><\/div><\/div><div class=\"table_col\"><h3 style=\"background:#00a952; color:#ffffff\">Water depth (m)<\/h3><div class=\"table_line_ctn\"><div class=\"table_line\"><p>1.26<\/p><\/div><div class=\"table_line\"><p>1.26<\/p><\/div><div class=\"table_line\"><p>1.26<\/p><\/div><\/div><\/div><div class=\"table_col\"><h3 style=\"background:#00a952; color:#ffffff\">Volume (m3)<\/h3><div class=\"table_line_ctn\"><div class=\"table_line\"><p>0.60<\/p><\/div><div class=\"table_line\"><p>0.303<\/p><\/div><div class=\"table_line\"><p>0.68<\/p><\/div><\/div><\/div><\/div>\r\n\r\n<!-- Table END-->\n[vc_column_text]To test the performance of the designed MBBR device, simulations were performed in wastewater modelling and simulation software GPS-X.[\/vc_column_text][vc_single_image image=&#8221;10175&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; title=&#8221;Fig 1. Simulation scheme for conventional activated sludge process (ASP).&#8221;][vc_single_image image=&#8221;10176&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; title=&#8221;Fig. 2 Simulation scheme for moving bed biofilm reactor (MBBR) process.&#8221;][vc_column_text]<strong><u>Aeration tank volume<\/u><\/strong><\/p>\n<p><strong>Fig. 3<\/strong> shows the effluent COD, BOD and TSS concentrations at <strong>different volumes of MBBR aeration<\/strong> tank and different wastewater temperatures. Also, in this case, the effluent COD and BOD concentrations show an exponential decrease of plant performance if the MBBR aeration tank volume is <strong>decreased<\/strong> below 0,4 m<sup>3<\/sup>. The highest sensitivity to plant operating volume is obtained at low temperatures. Hence, the MBBR aerobic tank volume of 0,323 m<sup>3<\/sup> is considered as <strong>the borderline volume<\/strong> for the design. Also, in this case, the effluent TSS concentrations were <strong>unaffected<\/strong> by the aeration tank design volume.[\/vc_column_text][vc_single_image image=&#8221;10177&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; title=&#8221;Fig. 3. Effluent COD, BOD and TSS concentrations obtained at different aeration tank volumes. The vertical line indicates the operation at the MBBR design volume&#8221;][vc_column_text]<strong><u>Two-tank configuration<\/u><\/strong><\/p>\n<p>Analysis of plant performance was also performed for different BOD <strong>removal configurations<\/strong>, i.e. single stage BOD removal with <strong>one aeration tank<\/strong> and two-stage BOD removal with <strong>two aeration tanks<\/strong>. In the second case, the total volume was <strong>35 %<\/strong> and <strong>65 %<\/strong> of the total volume for the first and second aeration tank, respectively.<\/p>\n<p>Simulations were performed at a critical temperature of <strong>10 \u00b0C<\/strong>. <strong>Fig. 4.<\/strong> shows the results of both plant configurations and different total aeration tank volumes.<\/p>\n<p>Results indicated that two-stage configuration outperforms the single-stage configuration, especially at larger total aeration tank volumes, where <strong>COD removal is improved for around<\/strong> <strong>10 %, BOD removal<\/strong> for around <strong>50 %<\/strong>, while effluent TSS concentration <strong>were not affected<\/strong>.<\/p>\n<p>At the design MBBR aeration tank volume of <strong>0,323 m<sup>3<\/sup><\/strong>, the improvement is smaller; COD was improved for around <strong>7 %<\/strong> and BOD for around <strong>20 %<\/strong>. The obtained effluent concentrations for COD, BOD and TSS at a critical temperature of 10 \u00b0C are 70,57 mg COD\/L, 16,3 mg O<sub>2<\/sub>\/L and 15,6 mg\/L, respectively.[\/vc_column_text][vc_single_image image=&#8221;10178&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; title=&#8221;Fig. 4. Effluent COD, BOD and TSS concentration obtained for 1- or 2-tank configuration and different total aeration tank volumes. The vertical line indicates the operation at the MBBR design volume.&#8221;][vc_single_image image=&#8221;10179&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221;][\/vc_column][\/vc_row]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The company Bor-plastika is the only company in Croatia that, in cooperation with INL &#8211; International Iberian Nanotechnology Laboratory from Portugal and JSI &#8211; Jo\u017eef Stefan Institute from Slovenia, improved&#8230;<\/p>\n","protected":false},"author":1,"featured_media":10174,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[74,1],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<meta name=\"description\" content=\"The company Bor-plastika is the only company in Croatia that, in cooperation with INL - International Iberian Nanotechnology Laboratory from\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.borplastikaeko.al\/en\/wastewater-treatment-device\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Determination of key design parameters for MBBR wastewater treatment device - 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