AQUATEST a.s.

TECHNICAL SUPPORT DIVISION - 70

Modular units for mine water disposal

A set of technical equipment designed for mine water disposal is conceived as modular and enables high technological and

partially also capacity flexibility. It includes basic operations – performing chemical reactions (acid base, precipitation, oxidation, and reduction), separation of solid body and

additional treatment of purified mine water.

In practice, these modular units have been tested in the former fluorspar mine at Běstvina village

Běstvina

Module 1 – preparing chemicalsThe module includes technical equipment for

preparation of water suspensions, chemical solutions, and other auxiliary substances for

use in other modular units.

View of the mixing tank with lime suspension

Detail of two dosing pumps for

lime milk, rated capacity 100 l/hr,

controlled by frequency converter,

depending on pH set

Detail of two dosing pumps for

chemicals, rated capacity 5 and 17

l/hr

El. distribution box with LAVO control

unit

The module is designed for performing all reactions in

liquid stage, notably for mine water neutralisation, iron

oxidation, reduction, chemical precipitation of individual contaminants, etc. Overall

views of reaction tanks arrangement.

Distribution system of module 2 with built-in pH meters that control frequency converters of dosing pumps of

module 1

View of crude water inlet to the first reaction tank, and the second reaction tank with pH measuring

and inlet from dosing pump.

Crude water inlet to this module with flow regulation and

measuring

Module 2 – Chemical operations

This module includes a set of regular process

equipment to separate solids from the solution by

sedimentation and filtration. Filtration equipment is part

of the module.

Module 3 – separation of phases

View of the screw pump and distribution box with

built-in frequency converter, which depending on the

pressure controls the screw pump

continuously during filtration to fill the

sludge press evenly.

From this tank (sludge tank),

filtration is carried out through a

sludge press under the pressure up to

10 bar.

View of the filtrate and sludge tank.

Down to the left is a pump that pumps water to dispatch

tank through control valve.

Module 4 – auxiliary operations

Module 4 is conceived as an auxiliary unit for modules 1 – 3.

It includes pumping technology, storage and

interoperation capacities, set of flexible connections, etc.

Top view of the from the tube setter where

gravitational separation of solid base takes place. At

the front – suspension prior to sedimentation, at the back

– clean water overflow.

Detail of suspension at the inlet of tube setter.

Detail of clean water overflow from tube

setter

Technological diagram of all modules interconnection

Raw mine water

Treated mine water

Process water

Lamella settler

Treated water distribution

tank

Raw water storage tank

Well