ATAL Engineering Limited


	Introduction
	ABRANE® Membrane Bioreactor
	ATAL High Rate Filtration
	ATAL BAF Process
	ATAL Cross Flow Sedimentation Tank
	ATAL Automatic Refuse Collection System
	Heinicke Cremator
	ABEL Membrane Pump
	Siemens Filter Press
	Flakewood Compressor
	LEOPOLD Filter
	Maxit Filter Media
	Siemens IWS Microfilter Model
	SATTLER Double Membrane Biogas Storage Tank

The Chemical Process of Removing SS via Cross Flow Filtration

	Completely remove SS to < 1 mg/l
	Remove heavy metal from surface treatment and final treatment (nickel, copper, zinc, lead, chrome, etc.¡^
	Regular concentration < 0.1 mg/l
	The best water circulation treatment system

EF and EFC 400 Series Systems:

Standard systems are skid mounted and include backpulse mechanism, ANSI stainless steel recirculation pump with double mechanical seal, membrane filtration section with 4-tube modules, complete cleaning-in-place system with air operated diaphragm pump, two HPDE or polypropylene cleaning tanks mounted under the modules, and a complete electrical control panel (NEMA-12). Standard electrical supply voltage is 460 VAC.

EFC units include a FRP concentrate recirculation tank (HPDE on EFC-4XX), pump level controls, an air operated sludge transfer pump, associated pump suction, and process return lines. The concentration tank is equipped with a low level pump control to protect the pump from running dry and a high level pump contact to be hooked up to the customer-supplied feed pump control to shut off the feed pump if the concentration tank level is too high. Also supplied with the EFC units are inlet and outlet piping between the membrane skid and the concentration tank, with the orifice plates to control the flow through the membrane modules.

EF units are supplied without the concentration tank, sludge withdrawal pump, membrane train inlet and outlet valves, and orifice control plates.

EF and EFC 1200 Series Systems:

Standard systems are skid mounted and include a membrane filtration section with 4-tube modules, a backpulse mechanism, ANSI stainless steel recirculation pump with double mechanical seal, complete cleaning-in-place system with air operated diaphragm pump, two polypropylene cleaning tanks mounted under the module rack, and a complete electrical control panel (NEMA-12). Standard electrical supply voltage is 460 VAC.

EFC units are supplied with a concentration tank to act as a reservoir from which the slurry is pumped and returned. The concentration tank is equipped with low level pump control to protect the recirculation pump from running dry and a high level pump contact to be hooked up to the customer-supplied feed pump control to shut down the feed pump if the concentration tank level is too high. Also supplied with the EFC units are the inlet and outlet piping between the membrane skid and the concentration tank, and the orifice plates to control the flow through the membrane modules.

EF units are supplied without the concentration tank, sludge withdrawal pump, membrane train inlet and outlet valves, and orifice control plates.

EF and EFC 2400 Series Systems:

EF units are supplied without the concentration tank, sludge withdrawal pump, membrane train inlet and outlet valves, and orifice control plates.

EF and EFC 3600 Series Systems:

EF units are supplied without the concentration tank, sludge withdrawal pump, membrane train inlet and outlet valves, and orifice control plates.

EFC 4800 Series Systems:

EFC 7200 Series Systems:

EFC 108 Series Systems:

Process Description and Process Flow Diagrams:

Reaction Chambers (C1 and C2):

The CPS is provided with two-stirred chamber reactors, in series, to perform the process chemistry required for the specific waste stream. Each reactor is provided with a continuously operating mechanical mixer, an on-line pH sensor and transmitter, and two chemical reagent metering pumps. The process waste gravity overflows from the first reaction chamber into the second reaction chamber during operation. The system PLC monitors the chamber pH levels, controls the addition of reagent chemicals into the reaction chambers, and activates alarm lights and horn in the event of an out of specification condition (pH or ORP) in the chambers. Options for the reaction chambers include ORP sensors and transmitters, dual pH/ORP instrumentation for on-line backup, and additional chemical metering pumps.

Flocculation Chamber (C3):

The solid particles generated within the two reaction chambers of the CPS overflow into a slow mix chamber called the flocculation chamber. This chamber is used to blend the incoming particles with a coagulant, typically anionic polymer, with a low shear, low speed paddlewheel mixer to generate larger and faster settling particles. The larger particles gravity flow into the clarifier chamber via a slot in the bottom of the flocculation chamber.

Clarifier Chamber (C4):

The CPS includes an inclined plate clarifier chamber with automated sludge removal controls. Solids generated in the two reaction and flocculation chambers overflow into the clarifier chamber and settle in troughs built into the bottom of the clarifier. As the sludge accumulates in the bottom of the clarifier, it is removed periodically via sludge draw lines, located in the bottom of the troughs, and an air diaphragm sludge pump. The sludge removed from the bottom of the clarifier chamber is sent to one of the two sludge age chambers for storage. Manual valves are provided on each sludge draw line to regulate the amount of sludge removed from each trough. Optional automated pneumatic valves can be provided on each sludge draw line to more accurately control sludge removal. The sludge pump operating duration, controlled by the system PLC, can be adjusted by the operator at the system control panel.

Manual air sparge lines are also provided in the bottom of the clarifier troughs to redistribute any solids that have not been removed by the sludge draw lines. This redistribution of the sludge is performed not more than once a day, as preventive maintenance.

The clarified water that has passed through the clarifier packing then gravity overflows into the effluent sampling chamber via weir piping.

Effluent Clearwell Chamber (C5):

The clarified wastewater overflows into the effluent clearwell chamber. This chamber is supplied with a high level alarm switch and an optional pH sensor and transmitter for final effluent monitoring. The treated wastewater either gravity overflows or is pumped via optional transfer pumps, with level controls, to the drain connection point.

Sludge Age Chambers (C6 and C7):

The sludge removed from the bottom of the clarifier chamber is pumped into one of two sludge age chambers for further settling and storage. Each chamber is provided with a high level alarm switch, a manual decant valve assembly, and a draw line for filter press feed. The operator will select one of the sludge age chambers to receive the sludge from the clarifier, via a manual valve. As the sludge further settles in these chambers, the decant water will be returned to the influent collection tank, separate equipment, via the decant valve assembly and gravity flow to an optional decant pump.