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A Simba disk harrow An Evers disk harrow. A disk harrow is a harrow whose cutting edges are a row of concave metal discs, which may be scalloped or set at an oblique angle. It is an agricultural implement that is used to till the soil where crops are to be planted.
For small livestock there are corresponding conversions. Depending on the quality of the Alp or Alm a full Stoß may require between 1/2 ha and 2 ha. The Stoß is divided into feet or Füße. A full Stoß is the pasture required by a cow, and equals 4 Füße. Bulls, calves, etc., are a fraction of that, e.g. a one-year old bull needs 2 Füße.
No-till farming (also known as zero tillage or direct drilling) is an agricultural technique for growing crops or pasture without disturbing the soil through tillage.No-till farming decreases the amount of soil erosion tillage causes in certain soils, especially in sandy and dry soils on sloping terrain.
Diagram of rotational grazing, showing the use of paddocks, each providing food and water for the livestock for a chosen period. In agriculture, rotational grazing, as opposed to continuous grazing, describes many systems of pasturing, whereby livestock are moved to portions of the pasture, called paddocks, while the other portions rest. [1]
These stages increase the initial cost of the aerobic system, and also the maintenance requirements over the passive septic system. Unlike many other biofilters, aerobic treatment systems require a constant supply of electricity to drive the air pump increasing overall system costs. The disinfectant tablets must be periodically replaced, as ...
2. liquid supply 3. air inlet port 4. air supply line 5. air port 6. air outlet 7. fluid intake 8. riser tube 9. air liquid mixture 10. pump outlet L: liquid, usually wastewater LL: liquid level V: Vessel G: Gravel or solids. An airlift pump is a pump that has low suction and moderate discharge of liquid and entrained solids. The pump injects ...
Extended aeration agitates all incoming waste in the sludge from a single clarifier. The combined sludge starts with a higher concentration of inert solids than typical secondary sludge and the longer mixing time required for digestion of primary solids in addition to dissolved organics produces aged sludge requiring greater mixing energy input per unit of waste oxidized.
Activated sludge tank at Beckton sewage treatment plant, UK.The white bubbles are due to the diffused air aeration system. The activated sludge process is a type of biological wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa.
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