Inoculum was originated from a 1000-[m.sup.3] size of sludge digestion tank
(Qingdao, China) operating at 35[degrees]C, with a 20-day retention time.
Biffa recommended the installation of a number of in-plant innovations, including a revolutionary machine that crushes milk bottles, feeding milk to an anaerobic digestion tank
and plastic to a baler.
Biological sludge generated during the wastewater treatment process is digested on-site using an aerobic digestion tank
that provides an environment in which the micro-organisms metabolize and consume a portion of the wasted biomass.
Much of the technology that's being used in the process is imported from companies in Sweden, Switzerland and Germany, including the digestion tank
agitator, the waste intake sorter and engine, respectively.
The blended organic wastes are then pumped into the 500,000 gallon digestion tank
This slurry was pumped into the anaerobic digestion tank
and suitable methanogenic bacteria were introduced into the digester and were retained nearly for 96 hours.
The capillary seepage soil biofiltration system, shown in Figure la, consists of a train of underground treatment units of one wastewater distribution tank (1.2 m long x 0.6 m wide x 1.6 m high), the first facultative digestion tank
(16 m long x 8 m wide x 2.5 m high), the first set of capillary seepage soil biofiltration beds, the second facultative digestion tank
(16 m long x 10 m wide x 2.5 m high), the second set of capillary seepage soil biofiltration beds, followed by a discharge tank (3 m long x 3 m wide x 3.5 m high).
The main digestion tank
(stainless steel) holds 7900 L.
Scottish Water Horizons, the commercial arm of Scottish Water, has recently welcomed delivery of the cutting-edge digestion tank
that will turn food waste into energy.
The liquid displaced from the digestion tank
when raw sludge is introduced, called "supernatant," is high in solids and BOD and must be treated in some way.