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X' = MLSS (kg/m 3) X' r = return sludge concentration (kg/m 3) Q s = sludge surplus (or excess) flow rate (m 3 /d) This equilibrium formula for settling tanks is mostly calculated for the initial flows in m3/h. This formula describes that the incoming amount of MLSS in a settler should be equivalent to the outcoming amount of MLSS via the ...
The kilogram per cubic metre (symbol: kg·m −3, or kg/m 3) is the unit of density in the International System of Units (SI). It is defined by dividing the SI unit of mass, the kilogram, by the SI unit of volume, the cubic metre. [1]
Sludge Volume Index (SVI) is a process control parameter used to describe the settling characteristics of sludge in the aeration tank of an activated sludge process. [1] It was introduced by Mohlman in 1934 and has become one of the standard measures of the physical characteristics of activated sludge processes.
Fecal sludge collected from pit latrines near Durban, South Africa, awaiting further treatment by drying. Sludge (possibly from Middle English slutch 'mud, mire', or some dialect related to slush) [1] is a semi-solid slurry that can be produced from a range of industrial processes, from water treatment, wastewater treatment or on-site sanitation systems.
The use of aerobic granular sludge ... removed a nitrogen loading rate of 1.0 kg-N/m 3 ·d with an ... with a capacity of 59.000 pe and 1,500 m3.h-1, being the first ...
is the slurry density ρ l {\displaystyle \rho _{l}} is the liquid density In aqueous slurries, as is common in mineral processing, the specific gravity of the species is typically used, and since specific gravity of water is taken to be 1, this relation is typically written:
Mixed sludge and sewage is decanted at the surface and separated into supernatant and sludge components. The efficiency of deep shaft treatment can be high. Surface aerators are commonly quoted as having an aeration efficiency of 0.5–1.5 kg O 2 /kWh (1.1–3.3 lb O 2 /kWh), diffused aeration as 1.5–2.5 kg O 2 /kWh (3.3–5.5 lb O 2 /kWh).
Density system unit unit-code symbol or abbrev. notes sample default conversion combination output units Metric: kilogram per cubic metre: kg/m3 kg/m 3: 1.0 kg/m 3 (1.7 lb/cu yd)