A portable waste treatment apparatus for treating hydro-excavation waste includes an elongate frame formed from separable upper and lower frame sections mounted upon one another. The upper frame section houses a mixing tank for receiving waste slurry and for mixing the waste slurry with flocculating and/or coagulating agents. A thickener tank receives waste slurry from the mixing tank, and a dewatering device is provided for dewatering sludge collected in the thickener tank. The lower frame section houses a buffer tank arranged to receive sludge from a sludge outlet of the thickener tank. A pump is provided for pumping the sludge to the dewatering device, and a water tank is arranged to receive water overflowing from the thickener tank.
A method of treating and grading contaminated particulate material comprising the steps of:- i. physically breaking up the particulate material to separate the particles thereof; ii. rinsing and grading the particulate material to separate the particulate material into an oversize fraction and an undersize fraction; iii. washing and grading the oversize fraction to produce one or more treated aggregate products; iv. passing the undersize fraction through a high shear washing process to separate contaminants therefrom; v. fluidising the undersize fraction in a classification tank to produce one or more treated sand products at an underflow thereof, wherein clean water is passed upwardly into said classification tank to fluidise and clean the undersize fraction. Preferably waste water resulting from stages (ii), (iii) and (iv) is treated to form process water, a portion of said process water being used in stage (ii), a portion of the process water undergoing one or more further treatment processes to produce clean water used in stage (v).
An apparatus for feeding slurry to a recycling or slurry treatment process at an elevated location, said apparatus comprising a reception hopper for receiving said slurry from a transport vehicle and a bucket elevator for conveying said slurry from a loading zone in communication with the reception hopper to a discharge zone at an elevated location, wherein said reception hopper comprises a trough having parallel side walls and a bottom wall, said loading zone of said bucket elevator communicating with a first end of said trough, said trough including a movable wall extending perpendicular to said side walls of the reception hopper and being moveable towards said first end of the trough to urge slurry towards the loading zone of the bucket elevator.
A portable waste treatment apparatus for treating hydro-excavation waste comprising an elongate frame formed from separable upper and lower frame sections mounted upon one another, the upper frame section housing a mixing tank for receiving waste slurry and mixing the waste slurry with flocculating and/or coagulating agents, a thickener tank receiving waste slurry from the mixing tank, and a dewatering device for dewatering sludge collected in the thickener tank, the lower frame section housing a buffer tank arranged to receive sludge from a sludge outlet of the thickener tank, a pump for pumping said sludge to said dewatering device and a water tank arranged to receive water overflowing from the thickener tank.
A slurry handling apparatus comprising at least one reception hopper (10Α,10Β) comprising a base (12), a rear wall (18) and opposing side walls (14,16), an opening (20) being provided in the base (12), wherein slurry delivered into the reception hopper (10Α,10Β) from a tanker (2) can pass through the opening (20) in the base (12), a respective first dewatering screen (30A, 30B) having an apertured screening deck (32) being located beneath the at least one reception hopper (10Α,10Β) whereby slurry passing through the opening is delivered onto the deck (32) of the respective screen (30A, 30B), undersize material and water passing through the apertures of the deck (32) to be received within a sump (44), oversize material passing over the deck (32) to be discharged from a downstream end of the deck (32).
A test apparatus for a waste water treatment system comprising a fluid passageway having an inlet (22) communicating with a first region of a flow path (14) of the waste water treatment system and an outlet (24) communicating with a second region of said flow path (14), downstream of said first region, at least a portion of said fluid passageway defining a test chamber (20) within which a test may be carried out, wherein said inlet (22) and outlet (24) are arranged within the flow path (14) such that a pressure differential exists between said inlet (22) and outlet (24) such that waste water is caused to be diverted from the flow path (14) through the test chamber (20) from the inlet (22) to the outlet (24) of the fluid passageway. First and second valves (26, 28) may be provided in the fluid passageway upstream and downstream of the test chamber (20), said valve (26, 28) being operable to trap a test sample of waste water within the test chamber (20) during a test process.
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