| Parameter | ATV-DVWK-A 131 | ATV-DVWK-A 131E | EN 12255 | |-----------|----------------|-----------------|-----------| | Sludge age | Primary | Primary | Not primary | | Clarifier | SLR + SOR | SLR + SOR | SOR only | | Denitrif. rate | Temperature-dependent | Similar | Empirical |
Specifically designed for single-stage activated sludge plants of any size (revised from its 1991 version which only covered plants for ≥is greater than or equal to 5,000 inhabitants) .
The guideline provides a deterministic mathematical methodology to dimension single-stage activated sludge systems. Unlike purely empirical approximations, this standard systematically links sludge age, operational temperature, organic loading, and specific nutrient removal requirements. Key design targets covered by the standard include: Atv DVWK A 131 e | PDF - Scribd atv dvwk a 131 epdf top
The ATV‑DVWK‑A 131 is not just a German standard; it is a reference worldwide. Several factors contribute to its high reputation:
The top PDF will have these formulas in clear mathematical notation (not scanned handwriting). | Parameter | ATV-DVWK-A 131 | ATV-DVWK-A 131E
Published by the German Association for Water, Wastewater and Waste (now DWA), the (often referenced as ATV-A 131 or A 131 E) outlines the procedures for designing single-stage activated sludge plants. It is specifically designed to deal with plants serving more than 5,000 total inhabitants and population equivalents (PT).
+---------------------------------------------------------------------------------+ | INFLUENT CHARACTERISTICS | | - BOD5 / COD Loads - Total Suspended Solids (TSS) | +---------------------------------------------------------------------------------+ | v +---------------------------------------------------------------------------------+ | SLUDGE AGE & VOLUME DETERMINATION | | - Minimum Aerobic Sludge Age Calculation based on Temperature | | - Total Reactor Volume (VB) and Anoxic Volume Fraction (VD/VB) Sizing | +---------------------------------------------------------------------------------+ | v +---------------------------------------------------------------------------------+ | OXYGEN & AIR DEMAND Sizing | | - Carbonaceous Respiration (OU_C) | | - Nitrification Oxygen Demand (OU_N) minus Denitrification Credit (OU_D) | +---------------------------------------------------------------------------------+ 1. Excess Sludge Production ( WSdcap W cap S sub d Published by the German Association for Water, Wastewater
Option to base design on Chemical Oxygen Demand (COD) rather than just BOD.
| Parameter | ATV-DVWK-A 131 | ATV-DVWK-A 131E | EN 12255 | |-----------|----------------|-----------------|-----------| | Sludge age | Primary | Primary | Not primary | | Clarifier | SLR + SOR | SLR + SOR | SOR only | | Denitrif. rate | Temperature-dependent | Similar | Empirical |
Specifically designed for single-stage activated sludge plants of any size (revised from its 1991 version which only covered plants for ≥is greater than or equal to 5,000 inhabitants) .
The guideline provides a deterministic mathematical methodology to dimension single-stage activated sludge systems. Unlike purely empirical approximations, this standard systematically links sludge age, operational temperature, organic loading, and specific nutrient removal requirements. Key design targets covered by the standard include: Atv DVWK A 131 e | PDF - Scribd
The ATV‑DVWK‑A 131 is not just a German standard; it is a reference worldwide. Several factors contribute to its high reputation:
The top PDF will have these formulas in clear mathematical notation (not scanned handwriting).
Published by the German Association for Water, Wastewater and Waste (now DWA), the (often referenced as ATV-A 131 or A 131 E) outlines the procedures for designing single-stage activated sludge plants. It is specifically designed to deal with plants serving more than 5,000 total inhabitants and population equivalents (PT).
+---------------------------------------------------------------------------------+ | INFLUENT CHARACTERISTICS | | - BOD5 / COD Loads - Total Suspended Solids (TSS) | +---------------------------------------------------------------------------------+ | v +---------------------------------------------------------------------------------+ | SLUDGE AGE & VOLUME DETERMINATION | | - Minimum Aerobic Sludge Age Calculation based on Temperature | | - Total Reactor Volume (VB) and Anoxic Volume Fraction (VD/VB) Sizing | +---------------------------------------------------------------------------------+ | v +---------------------------------------------------------------------------------+ | OXYGEN & AIR DEMAND Sizing | | - Carbonaceous Respiration (OU_C) | | - Nitrification Oxygen Demand (OU_N) minus Denitrification Credit (OU_D) | +---------------------------------------------------------------------------------+ 1. Excess Sludge Production ( WSdcap W cap S sub d
Option to base design on Chemical Oxygen Demand (COD) rather than just BOD.
