operational area | usage

Areas of use

• Municipal and industrial wastewater treatment
• Water treatment
• Sludge treatment

Application

• Minimisation of the phosphorus discharge values
• Improvement in sludge sedimentation and sludge dewatering properties
• Neutralisation
• pH adjustment
• Optimisation and levelling out of the nutrient balance
• Pretreatment through flocculation in the primary sedimentation
• Water treatment

Technology | Process

Chemical dosing requires a complete system consisting of storage tank sensors and dosing stations. Dosing stations ,their switches and control systems are housed in protective cabinets. The housing materials are carefully selected according to the chemicals used.

The pulsation damper is positioned downstream of each pump and ensures that there are no pressure peaks or low-pulsation flow. Overflow valves protect the pumps, which theoretically can build-up very high pressure. Pressure maintaining valves ensure a constant pressure within the dosing system.

The quantity of chemicals to be dosed can be measured using an optional MID or oval-gear meter. The control pumping system is activated by a means of a measuring device within the tank and ensures optimum addition of dosing chemicals depending on the wastewater level. The requirements for integration in a process
control system are fulfilled.

Chemicals used

• Acidic dosed chemicals such as: Iron chloride, iron chloride sulphate, aluminium sulphate, polyaluminium chloride (PAC), iron (II) sulphate, ammonium sulphate, phosphoric acid, hydrochloric acid, etc.
• Alkali dosed chemicals such as: Sodium aluminate, sodium hydroxide, lime water (CaCO3), magnesium hydroxide, sodium hypochlorite
• Urea
• Anionic and cationic polymers
• Defoaming agents
• Organic acids: Formic acid, citric acid, acetic acid
• Methanol, ethanol and other carbon sources
• Oxidants: Potassium permanganate

Process Engineering Components

• Storage tank and dosing station for outdoor and indoors
• Outdoor installation:
  • Storage tank with or without insulation / heating
  • Dosing station switches and control gears in weatherproof housing
• Indoor installation:
  • Storage tanks with and without exhaust air treatment
  • Supply and exhaust air routed to the outside
  • Dosing station with splash protection
• Lifting units for tanks
• Dosing station with dosing plate, switch and control cabinet as a preassembled unit
• Compact dosing station safety
• Module container with Intermediate Bulk Container (IBC) as chemical store
• Control systems for delivery rate adjustment
• Linkage to process control system possible