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Liquid management refers to the sub-surface injection of liquid organic waste streams into the soil rooting zone of pastures and crops.
Bio-Recycle owns and operates a fleet of specialised self-propelled and tractor drawn tankers, or Sludge Injection Vehicles (SIV), which inject liquids under high pressure into the soil for agricultural gain.

Many organic liquid wastes possess valuable nutrients or available lime, whichmay be utilised to either enrich the soil or to rectify soil acidity. These liquids all have a high water component, which adds significant irrigation value. When injection is carried out by these specialised vehicles, there is little surface disturbance or odour, and such programmes may be conducted in semi-residential areas.

Bio-Recycle’s sludge injection programme manages a vast array of biosolids, manures, treated greasetrap and food industry by-products, that otherwise may have been deposited in expensive, lined landfills. Carefully monitored quality control is essential to maintain optimum input of nutrients for each soil type and crop. Pasture and crop growth following a soil injection programme has produced some staggering plant dry matter yield responses. Soil application rates are calculated from nutrient properties of the injected liquid and the water holding capacity of the soil.

The SIVs are able to load from either road tankers, ground tanks, or lagoons. To load the vehicle an inductor valve is opened from inside the cab with a pressure/vacuum pump filling the 15,000 litre tanks within minutes. All self propelled units are full-time four-wheel-drive, whilst tractor-drawn machines are pulled by four-wheel-drive tractors.

This injection system allows liquids to be placed deep into the rooting zone of selected crops or pastures, thereby maximising plant uptake and minimising soil leaching, surface run-off and odour.

Liquids are distributed through the soil profile under a radial expansion pattern from a heavy duty injection system which may reach down 350mm into the soil. High speed dispersal means large areas of land are able to be improved each day. The vehicle’s high flotation tyres distribute the weight of each machine for a surface pressure of only 15 lb per sq inch, effectively preventing soil compaction.

Bio-Recycle’s liquid management programme represents a great opportunity for the agricultural industry to benefit from valuable components of liquid organic waste streams.

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