Biocides

Wastewater & Effluent Treatment

Wastewater & Effluent Treatment

Reuse of water is key to preserving our natural resources and waste water treatment is an integral part of this. Waste water treatment plants are rarely at optimal performance and often money is literally going down the drain. The right products and approach can help you to help your customers improve the quality of their waste water discharge thus minimising environmental impact.

The particular challenges of waste water treatment vary from site to site and industry to industry. The challenges may include issues from both inorganic and organic contaminants which can be detrimental to the toxicity, pH, colour, odour and/or oxygen demand of receiving waters.

B & V Chemicals understands the complex chemical requirements of industrial wastewater treatment and has technical resources dedicated to support the needs of our customers operating in this area. We are committed to innovation in the solutions and technology we supply, and to providing the highest level of service to our customers. To support this ethos we have a broad range of chemistry solutions designed specifically for use in wastewater treatment.

pH adjustment

pH adjustment may be required for a number of reasons:

  • To directly precipitate out chemicals otherwise present as more soluble salts
  • To increase the efficacy of any coagulants used
  • To enable discharge limits to be met
  • To maximise the concentration of the most efficient chlorine containing species for disinfection (e.g. hypochlorous acid vs hypochlorite)

The most commonly used chemicals for pH adjustment in effluent plants are lime, sodium hydroxide and sodium bicarbonate.

 

Product code Composition Comments
NF-CEM 505
An aqueous solution of sodium hydroxide. Concentrated alkaline pH adjuster for many applications including adjusting the pH of waste water.
NF-CEM 507 Sulphuric acid Concentrated acidic pH adjuster for many applications including adjusting the pH of waste water.
NF-CEM 509 Lime suspension An alkali for use in pH control of potable water, effluent treatment and flue gas treatment.
NF-CEM 511 Phosphoric acid Concentrated acidic pH adjuster for many applications including adjusting the pH of waste water.
NF-CEM 513 Sodium Bicarbonate Powder product for neutralising acid solutions
NF-CEM 515 Sodium carbonate solution Liquid product used to increase the alkalinity of waste water.

Coagulants

Many of the solid particles in water are as suspended solids (a colloid). They are very small electrically charged particles which repel each other and will not settle out of suspension by gravity alone in a reasonable timeframe; hence the need for chemical treatment. This typically results in the removal of 80-90% of suspended solids by chemical precipitation.

Coagulants act by neutralising the charge which enables the particles to come together forming slightly larger particles or microflocs.

Traditional coagulants were inorganic compounds, and can have advantages over the inorganic coagulants in that the produced sludge volume is often less, sludge disposal costs can be lower and they are less pH dependent.

Product code Composition Comments
NF-CEM 517 Tannin based coagulant An aqueous solution of a complex organic polymer coagulant. Particularly appropriate for use in splitting oil- water emulsions. This product is also suitable for use in many applications such as the food industry, oil fields, petrochemical plants and metal working plants.
NF-CEM 519 An aqueous solution of polyaluminium chloride. A cost-effective primary coagulant product. Good insoluble organics removal giving effective BOD/COD reduction. Excellent phosphorous removal. Good colour removal.
NF-CEM 521 Aluminium hydroxide chloride Versatile product. Intrinsic buffering reduces pH swings. Good organics /colour removal. Also excellent phosphorous removal
NF-CEM 523 Polyaluminium chloride. A cost-effective primary coagulant product. Good insoluble organics removal giving effective BOD/COD reduction. Excellent phosphorous removal. Good colour removal.
NF-CEM 525 Trivalent aluminium enhanced by a powerful, highly charged cationic polymer. Effective BOD/COD removal with good organics/colour removal. An easy to feed liquid which produces lower sludge volumes. Excellent phosphorous removal,
NF-CEM 527 Ferric chloride Effective in clarification. Reduces phosphate levels. Reduces levels of heavy metals (e.g. lead, coper, cadmium and zinc)
NF-CEM 529 An aqueous solution of ferric ions Effective BOD/COD removal with good organics/colour removal. Excellent phosphorous removal