River Water Treatment Systems

Our river water treatment systems are ideal for the treatment of non-hygienic water that is murky, has a muddy sediment and reveals an unacceptable odour and taste, as is often the case with water coming from rivers, dams, canals, boreholes, etc. Systems of this nature are excellent at removing organic and bacterial contamination, iron and manganese and many have already been installed for clients all over South Africa, as well as in Lesotho, the Kongo and Angola.

 

Our river water treatment systems work as follows:

  • Water is pumped into a reservoir or tank
  • Pre-treatment takes place on the inlet side of the reservoir or tank.
  • A dispenser is installed in the pipeline just before the reservoir or tank
  • Dosing takes place while the reservoir or tank is being filled.
  • Dosing is done with chlorine and flocculent.
  • All bacteria and germs are destroyed by means of chlorine.
  • Chlorine tablets are supplied in containers of 10 tablets each (only 1 tablet and 100 ml of sudfloc will treat about 10 000 liter of water).
  • Sodium hypo chloride is needed when dosing pumps are used.
  • The maintenance cost for domestic purposes amounts to approximately R10.00 per week for the chemicals.
  • Larger installations and a higher flow rate use more chlorine tablets and flocculent.
  • It is advisable to give the water in the reservoir or tank at least one hour’s rest before use.
  • The reservoir or tank should preferably be filled in the evening.
  • Auto and manual, as well as high and low pressure systems are available.

The use of filters:

  • A combination of a silica sand filter and an activated carbon filter is installed on the outlet of the reservoir or tank in the pipeline that supplies the end user with water.
  • The sand filter prevents dirt from reaching and polluting the activated carbon filter.
  • The activated carbon filter not only improves clarity, but also removes undesirable odour and taste from the water, as well as excess chlorine.
  • Each manual filter is fitted with a multi-port valve that has a “backwash”, “rinse” and “filter” (service) position that can be set by positioning the handle on the valve.
  • Standard filters have 40mm delivery pipes and supply 9 000 litres per hour at a pressure of 1 Bar. Where the reservoir or tank is not high enough to render adequate pressure to backwash efficiently, a pressure booster pump can be installed before the filters to give the proper backwash results.
  • Where a large volume of water is required, filters can be adapted up to the required volume, while banks of filters are also supplied for large volumes.

Take note:

  • Murky water requires more flocculent to improve clarity.
  • Chlorine tablets to purifying drinking water are not the same type as those used in swimming pools. These tablets do not contain the detrimental “trichloroisocyanuric” acid stabilizer.
  • At least 1 Bar of water pressure is required to obtain sufficient backwash on filters, otherwise a pressure pump needs to be installed ahead of the filter. In such a case, high pressure filters should be used.

Our river water treatment systems can be used successfully by farmers, small towns, industries and mines.