Brine Treatment
Global Advantech’s process for the treatment of used/recovered completion brines removes sulphate cations, suspended solids, heavy metals, hydrocarbons and most other organic compounds, thus allowing their re-use and lowering completion costs. The process combines chemical treatment with electrocoagulation.
Global Advantech’s used/recovered brine treatment systems have a number of innovative advantages: Simultaneous removal of sulphate cations, suspended solids, heavy metals, hydrocarbons and most other organic compounds. Continuous flow operation. Lower capital, operation and maintenance costs compared with membrane filtration systems. No high pressure pumps, therefore much lower energy requirement than comparable throughput membrane system. No water pre-treatment required for the removal of suspended solids, heavy metals, hydrocarbons and most other organic compounds, biological material or scale-forming calcium salts. Depending upon conditioning chemistry selected for a particular brine/application, the main by-products from the process may be used to strengthen cement after being washed free of chloride ions.
Electrocoagulation is a proven and cost effective electrochemical process to remove most contaminants/pollutants from water: suspended solids, emulsified hydrocarbons and many dissolved organic compounds, heavy metals, arsenic, bacteria, algae, larvae, etc., from water for reuse/discharge. The electrocoagulation process is continuous flow and is low in energy consumption. Electrocoagulation cells consist of pairs of parallel metal plate electrodes separated by a few millimetres with a low voltage applied at high current densities. The current flowing between the electrodes destabilises electrical charges, which maintain suspensions of particulates, e.g. clays, and emulsions/micro-emulsions of hydrocarbons and insoluble organic compounds. The particulates coagulate together into flocs. The hydrocarbons and insoluble organic compounds coalesce into larger droplets and rise in the flotation/ sedimentation tanks. For more information, please refer to Technology Data Sheet: TDS801 Electrocoagulation and Advanced Electrochemical Oxidation.
Global Advantech’s systems contain a number of innovative design features and benefits to ensure effective and continuous operation: Compact single and full-size multi-cell systems, capable of handling from 1m3 per hour to more than 1,000m3 per hour water flow available. Cells use optimised electrochemistry, with a large number of parallel plate electrodes for efficient operation. Hydrodynamic design of cells ensures water flow is through the whole cell volume and electrodes are evenly consumed. Upward flow cells to prevent sediment build-up in the cells, with air injection to dilute hydrogen gas below lower explosion and flammability limits prior to flotation/sedimentation tanks. All systems are PLC controlled, programmed to prevent metal plate passivation (development of oxide layers of the surfaces of electrodes, which acts as insulation preventing cells from continuing to operate). Instrumentation options include plate consumption monitoring, telemetry for remote monitoring. The cell electrodes are mounted in carrier cartridges to facilitate rapid replacement. Multi-cell configurations enable a single cell to be taken off-line for maintenance. All cells are mounted inside safety cages with interlocks to prevent access during operation. Electrocoagulation systems are available configured for safe area operation and for operation in ATEX Zone 2.
