NATURE CLEAR GREYWATER SYSTEM

Nature-Clear is a grey water system designed to treat domestic wastewater excluding toilet waste. Councils are increasingly reticent to allow new homeowners to dispose of grey water without treatment. The days of being allowed to spray wastewater untreated onto the garden are coming to an end. Each state and council have their own regulations and you will need to speak to your local council to establish what they will permit alongside a waterless toilet. Please note however that there are variations from council to council.

Primary treated wastewater must be disposed of in sub surface irrigation trenches. Septic tanks are the main example of systems that treat only to the primary level. Secondary treated water can be disposed of at ground level either via mulch beds, drip irrigation or in some cases by spraying. Aerated water treatment systems (AWTS) treat to secondary level. Such systems include a disinfection unit, most commonly using chlorine. These systems typically cost around $5000 plus in ground installation. There are then annual inspection and maintenance fees plus wear and tear on the pumps and aerators and electricity costs totaling some $300-400 per year.

In order to satisfy the new council requirements Nature Loo has developed a grey water system which cleans waste water via a combined grease trap and gravity fed sand filtration. We have approval by the Queensland DNR for use of the system to treat water to the primary level.  The treated water is then dispersed through sub-surface irrigation trenches in areas that are benefited by the extra water.

The Nature-Clear system is explained overleaf. If your council or geotechnician will not support the installation of Nature-Clear then you can still propose a waterless toilet with treatment of grey water via a small septic tank just for grey water. We would also appreciate the opportunity to speak to your council and provide the latest test results on Nature-Clear.

Nature-Clear provides a simple and low cost effective means of treating grey water. Not only is the equipment low cost, but also, if your site is suitable, the only excavation work required to install the system will be the trenching. The ongoing costs will be less than those of a standard septic system.

In order for the Sand Filter to work effectively it is necessary to remove food scraps and grease from the kitchen wastewater. The Nature Clear Primary Treatment Tank incorporates a Grease Trap in the Bark Layer on top of the tank.

The filtration tank, which is less than 1 cubic meter in size, consists of a pine bark coarse filter on top of a fine sand filter. The coarse filter removes food scraps and grease from the kitchen waste water and lint from the washing machine. The sand filter traps still finer materials, polishes the water and reduces the coliform count. The pine bark is contained within a filter bag. The filtered material and bark will compost over time and should be removed once a year and replaced with fresh bark, available form your local garden nursery. If your distribution area is down hill from the filtration tank your Greywater System designer should be able to design a distribution system without the use of a pump. If this is not the case you will need our pump well and pump.

The 450 litre pump well contains a submersible pump with float valve, capable of lifting water to a height of 5 metres. The tank, which measures 1150mm in height with a skirt diameter of 1200mm, is located in the ground alongside the filtration tank. We can also provide an alarm system to alert you to a non functioning pump.

Nature-Clear is a Primary Treatment System and therefore you will need to distribute the treated water into a sub-surface irrigation trench system (Secondary Treatment) as specified by the Aust. Standard 1547. Make sure calculations of trench size do not include an allowance for toilet water, which would make them unnecessarily large and

expensive. The following links to sample designs, NCG System and NCP System have been designed to AS1547-2000. Your plumber can lay the treated water application area (distribution system) in accordance with a design calculated to your particular situation  by Adobe Loos & Worms.

Adobe Loos & Worms can do this design for you and supply the major components for your system. Please contact us for more information.

The price of the Nature-Clear Filtration Tank is $750.00 including GST plus freight.

The price of the Nature-Clear Pump Well and pump is $590.00 including GST plus freight. The pump is suitable for all situations with a head of water up to 5 metres. A High Level Water Alarm is $420 including GST plus freight.

 NATURE CLEAR Specifications

 FILTRATION TANK:

 ·         Material;                        Medium density grade polyethylene

 ·         Properties;  U.V stabilised, High stress resistance, High fracture resistance 

·         Thickness;                    Average 5 mm 

·         Construction; Rotational moulding, All surfaces are continuous with no welded or joined seams, Ribbed structure for additional strength 

·         Dimensions;  Height 780 mm, Length 940-1025 mm, Width 820-910 mm 

PUMP WELL / SECONDARY TREATMENT TANK: 

·         Material:                        Medium density grade polyethylene 

·         Properties;                     U.V stabilised, High stress resistance, High fracture resistance 

·         Thickness;                    Average 5 mm 

·         Construction;               Rotational moulding 

·         Dimensions;  Height 1150 mm, Diameter of skirt 1200 mm, Diameter of main body 1000mm

Schematic Diagram of Primary Filtration Tank and Pump Well.

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