Alpheus Environmental has
installed ABB control and
measurement equipment to
regulate effluent flows into a
sewage treatment works at
Basildon. The equipment has
helped improve operations
and will cut costs.

The Bedford-based
company specialises in the
treatment of tankered liquid
waste that is brought to site
by road tankers, treated and
then discharged to a sewage
treatment works. It needed to
regulate and monitor the flow
rate of discharged, treated
effluent and ammonia levels.

The company uses an ABB
ControlMaster universal
process controller and ABB
MagMaster flow meter
transmitter unit. This
arrangement controls the
speed of the outlet flow using
an actuator valve.

The ABB ControlMaster
also receives input from an
ammonia analyser. If the
level of ammonia leaving site
is close to the consented
limit, the analyser signals the
controller to shut down the
site and close any outlet valves.

It can also alert Alpheus and
Anglian Water by email.

An ABB SM500 data
recorder oversees, records
and reports data from this
new control system.