{"id":439545,"date":"2024-10-20T08:09:41","date_gmt":"2024-10-20T08:09:41","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-12255-62023-tc\/"},"modified":"2024-10-26T15:17:10","modified_gmt":"2024-10-26T15:17:10","slug":"bs-en-12255-62023-tc","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-12255-62023-tc\/","title":{"rendered":"BS EN 12255-6:2023 – TC"},"content":{"rendered":"

This document specifies performance requirements for treatment of wastewater using the activated sludge process for plants over 50 PT. The informative Annexes A to W provide design information.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\n30477672 <\/td>\n<\/tr>\n
81<\/td>\nA-30422430 <\/td>\n<\/tr>\n
82<\/td>\nundefined <\/td>\n<\/tr>\n
89<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
90<\/td>\n4 Symbols and abbreviations
4.1 Symbols <\/td>\n<\/tr>\n
92<\/td>\n4.2 Indices (not included in the symbols or abbreviations below) <\/td>\n<\/tr>\n
93<\/td>\n4.3 Abbreviations <\/td>\n<\/tr>\n
94<\/td>\n5 Requirements
5.1 General <\/td>\n<\/tr>\n
95<\/td>\n5.2 Planning
5.2.1 Basic information <\/td>\n<\/tr>\n
96<\/td>\n5.2.2 System selection <\/td>\n<\/tr>\n
100<\/td>\n5.2.3 Biological reactors
5.2.4 Clarifiers <\/td>\n<\/tr>\n
101<\/td>\n5.2.5 Environmental impact
5.3 Detailed Design
5.3.1 Flow-splitting
5.3.2 Biological reactors <\/td>\n<\/tr>\n
102<\/td>\n5.3.3 Mixing <\/td>\n<\/tr>\n
104<\/td>\n5.3.4 Aeration
5.3.4.1 General <\/td>\n<\/tr>\n
105<\/td>\n5.3.4.2 Fine bubble diffuser systems <\/td>\n<\/tr>\n
107<\/td>\n5.3.4.3 Surface aerators (vertical shaft and brush aerators) <\/td>\n<\/tr>\n
108<\/td>\n5.3.4.4 Injectors or ejectors
5.3.5 Secondary clarifiers <\/td>\n<\/tr>\n
110<\/td>\n5.3.6 Return and surplus sludge systems
5.3.7 Internal recirculation
5.3.8 Control and automation <\/td>\n<\/tr>\n
112<\/td>\n6 Test methods <\/td>\n<\/tr>\n
113<\/td>\nAnnex A (informative)Design of biological reactors <\/td>\n<\/tr>\n
114<\/td>\nAnnex B (informative)Raw wastewater characteristics <\/td>\n<\/tr>\n
115<\/td>\nAnnex C (informative)Removal efficiency of primary clarifiers <\/td>\n<\/tr>\n
116<\/td>\nAnnex D (informative)External carbon sources <\/td>\n<\/tr>\n
117<\/td>\nAnnex E (informative)Sludge age (MSRT) and aerobic sludge age (MASRT)
E.1 System for Carbon Removal only
E.2 Systems for nitrification at minimum 12 \u00b0C
E.3 Systems for nitrification and denitrification at minimum 12 \u00b0C
E.4 Systems for N removal and simultaneous aerobic sludge stabilization <\/td>\n<\/tr>\n
119<\/td>\nAnnex F (informative)Surplus sludge production <\/td>\n<\/tr>\n
121<\/td>\nAnnex G (informative)Denitrification capacity <\/td>\n<\/tr>\n
122<\/td>\nAnnex H (informative)Oxygen Consumption <\/td>\n<\/tr>\n
124<\/td>\nAnnex I (informative)Iterative calculation of the volumetric ratio of denitrification reactors (VDen\/VR) <\/td>\n<\/tr>\n
125<\/td>\nAnnex J (informative)Reactor volume (VR) <\/td>\n<\/tr>\n
126<\/td>\nAnnex K (informative)Internal recirculation ratio (IRR) <\/td>\n<\/tr>\n
127<\/td>\nAnnex L (informative)Alkalinity <\/td>\n<\/tr>\n
129<\/td>\nAnnex M (informative)Aerobic selectors <\/td>\n<\/tr>\n
130<\/td>\nAnnex N (informative)Design based on F\/M-ratio <\/td>\n<\/tr>\n
131<\/td>\nAnnex O (informative)Sludge volume index (SVI) <\/td>\n<\/tr>\n
132<\/td>\nAnnex P (informative)Solids concentration of the return sludge (CTSS,RS) <\/td>\n<\/tr>\n
133<\/td>\nAnnex Q (informative)Return sludge flow (QRS) and total suspended solids concentration in the biological reactor (CTSS,R)
Q.1 General
Q.2 Surface flow rate (qA) and surface sludge flow rate (qSV) <\/td>\n<\/tr>\n
135<\/td>\nAnnex R (informative)Surface area (ACla) of final clarifiers <\/td>\n<\/tr>\n
136<\/td>\nAnnex S (informative)Depth (hCla) of final clarifiers <\/td>\n<\/tr>\n
137<\/td>\nAnnex T (informative)Scraper Design <\/td>\n<\/tr>\n
139<\/td>\nAnnex U (informative)Return sludge balance <\/td>\n<\/tr>\n
140<\/td>\nAnnex V (informative)Influent structures <\/td>\n<\/tr>\n
141<\/td>\nAnnex W (informative)Design of a fine bubble aeration system <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Tracked Changes. Wastewater treatment plants – Activated sludge process<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2023<\/td>\n146<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":439553,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[214,2641],"product_tag":[],"class_list":{"0":"post-439545","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-13-060-30","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/439545","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/439553"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=439545"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=439545"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=439545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}