Wednesday, 05 December 2012 13:15

Remove solids before storing effluent

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SEPARATING SOLIDS from liquids before they enter storage is a major benefit in the process of effluent handling, says GEA Farm Technologies (GEA FT).

This company supplies the range of Houle equipment in New Zealand, covering the spectrum of effluent handling, from solids separators, pond pumps and agitation systems. 

Of particular interest, the solids separation technology offers a more modern way to manage the effluent that results from livestock intensification. As farmers are collecting more solids from feeding areas, they are faced with some of the challenges this can present. 

Solids in a pond (or tank) become difficult and costly to manage and over time accumulate to a point that reduces the available storage capacity. Hence seperating solids out before they enter storage is helpful.

Discharging effluent to land has also changed with a greater focus on deficit irrigation and matching the irrigation system to the farm’s soil types. By removing solids a lot of the ‘binding’ effect is removed when solid particles block soil pores, impeding soil infiltration ability and causing surface ponding. Another key benefit is the ability to irrigate effluent through many low application rate irrigators without the risk of blockages.

The Slope Screen is passive and the equipment involved does not require the same level of maintenance as screw press type separation systems. In combination with GEA FT’s sand sedimentation pit this system is very effective at removing virtually all solid material from the effluent stream. The Slope Screen comes in two sizes depending on effluent volumes and processing requirements. 

The common size being 1.2m which can process up to 36m3 per hour and new to the country is an 2.4m model that has been recently installed on a 2000 cow farm, processing all effluent from a dairy shed, feed pad and barn. 

This larger screen can process up to 145m3 per hour. The high processing capacity gives the operator greater ability to handle high inflow from rainfall events and minimises processing times. 

GEA Farm Technologies supply transfer pumps to feed the separators and this includes the Agi-Pompe that is designed to get effluent into a suitable state for efficient separation by agitating, chopping and transferring effluent all in one unit. 

The Agi-Pompe has shear knifes on the propeller to cut fibrous material. This transfer technology is very robust and reliable, designed by Houle to cater for the demands of Northern Hemisphere farms who predominantly have to deal with thick effluent from barn environments.

Tel. 0800 657 555

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