The dewatering of slurry or sludge is the operation which consists in separating suspended solids from liquids in biomass or sludge.

The combination of shredding and dewatering can be used to dewater biomass which is not in slurry form yet, such as garden wastes, food wastes, horse manure, paper slurry, eggshell....

domestic waste dump

The main reasons for dewatering are :

Application;

Food Waste / Green waste Dewatering

citrus orchard

Besides being a liability for producers and other communities, Food Wastes and Green Wastes represent a much bigger problem than simply filling up landfills and the cost of disposal.

Landfilled food waste and green wastes have a significant impact on the environment. Contrarily to popular believe food waste does not compost easily in landfill, because of the lack of oxygen which is required to break down the organic cells. In fact, putting food waste in landfill often results in an anaerobic digestion, which is the main producer of methane, a greenhouse gas 21 times more potent than CO2.

Food waste can have liquid content as high as 90%. The transport and the disposal of this part of the waste expensive and often require a dedicated logistic team while composting of food waste commonly requires mixing with drier materials to reduce the moist content to 60% maximum.
Effective dewatering of food waste is a goal for resource recovery as it is the high moisture content that creates challenges for handling, composting and vermiculture processing systems. Dewatering of food wastes can be achieved via the use of Prodiflex’s dewatering system, also used for dewatering in general food processing, for abattoir wastes, and some dairy wastes such as dairy shed effluent.

Once shredded and dewatered, the food wastes’ solid portion can represent as little as 10% of the initial weight and volume of the waste, hence reducing the cost of handling as well as reducing the potent gas creation. The liquid-juice extracted from the food-wastes can be disposed directly into the sewage system where its high organic content will facilitate the treatment of the sludge at the sewage treatment plant. In certain situations, the stream of waste water can be re-used directly for irrigation purpose or for other environmental usage such as additive for animal feed.

Agro Industry Dewatering

cattle manure recycling

COW MANURE

Keeping bedding and manure out of the treatment dam extends the interval period between maintenance. This reduces the frequency necessary to dredge dam. This cost deferral is a financial benefit. By keeping the solids out of the lagoon, odour generation is significantly reduced. Pressing the manure separates it into two streams: liquid and moist solids. The liquid can be drained to the waste lagoon, or it can be pumped for irrigation purposes without clogging nozzles.

The manure solids recovered rich in minerals and with the required 60% moisture, can then be composted very quickly or directly used to improve the soil quality or alternatively sold as grass fertiliser. For sensitive usage of the manure as soil enrichment product, such as industrial vegetable farms, it is possible to further dry and treat the solid part of the dried manure with our STEAM TREATMENT dewatering equipment, which will remove any pathogens that could still be in the dried manure. Once steam treated, the manure will have a moist content as low as 10% and still manly composed of organic fibres. This product can also be either briquetted into a marketable ECO-FUEL, or used on site as ENERGY CO-GENERATION.

EGG SHELL

From either sources: Breeding farms, Egg farms, or industrial bakeries. The issues remain the same, a big volume with a low density or waste need to

egg shell recycling

be disposed of. By separating the shell from the rest of the egg, one is able to recover a high protein liquid, which can be used as food supplement for feedstock and crushed shell which can also be used as food supplement or soil enrichment Calcium. During this process, the eggshell are completely crushed, which leads to a final-dry product ready for usage and a liquid by-product as well readily available for the final user.

SLUDGE (PAPER/SEWAGE/POND/INDUSTRIAL MUD..)

Industrial Sludge, and by-product of fibrous industry such as Paper Mill, Paper Recycling, Sewage treatment, industrial cleaning, industrial laundry, clothing industry..... are mainly constituted o water and Fibrous material (commonly called Sludge or Slurry ) that need to be disposed off. The traditional method being sludge/slurry pound with or without clarifier, thereafter the landfill site or refuse dump , at high expenses. In most cases the fibrous material can be separated from the liquid, which greatly reduce the volume and weight to be hauled out to the disposal centre. Weight reduction of 50% can easily been achieved while volume reduction up to 90% are not un-usual with a complete system.

Once the fibrous material has been separated from the liquid and the mass of fibre compacted or briquetted, the newly created Eco-Briquette can easily be used as a fuel in Boilers or Steam plants. Hence reducing the requirement in fossil energy as well as reducing to the bare minimum the disposal cost of the Sludge.