Buraydah Main Water Treatment Plant

As per tender specifications a direct replacement of existing UF system is focused. The existing plant equipment as UF building, civil works, pumps, pipes and instrumentation need to be used. The new ceramic membrane system needs to be finally connected to existing PLC and SCADA system with required modification. • Implementation of CFM Systems into existing UF trains. • Implementation of sludge slope inside filtration tank. • Implementation sprinkler system. • Installation of CFM Systems Filtration Racks. • Filtration equipment. • Central backwash unit. • Chemical circulation unit. • Sprinkler unit. • Blower unit. • Connection with existing PLC and SCADA.

• CFM Systems (Ceramic Flat Membrane Systems) combines the advantages of an inorganic filter and submerged flat membrane filtration for the first time. Due to the superiority of the new membrane generation, CFM Systems offers the following advantages: • Resistance against high temperatures, chemicals and aggressive media • Resistant against high inflow concentrations of iron (Fe), manganese (Mn), suspended solids, SDI and turbidity • High permeate quality – free of suspended solids, lowest concentrations of iron and manganese and lowest levels of SDI and turbidity • Extremely high recovery rates due to simple and short backwash options • Long-term operation due to an extremely robust filtration material • Modular design and extremely compact filtration trains which require minimum tank civil works

The core target of the pre-treatment is the forming of suspended Fe and Mn compounds- Typically used pre-treatment steps are aeration followed by chemical oxidation. During aeration dissolved Fe compounds are oxidized. The subsequent chemical oxidation realizes a further oxidation of dissolved Fe and an oxidation of dissolved Mn compounds. Common used chemicals are therefore chlorine gas or NaOCl with the additional advantage of water disinfection-Depending on the ground water characteristic additional chemicals are required to realize an oxidation. The oxidation of Fe requires a pH value higher than 6.8. In case of lower pH values caustic solution or other pH increasing chemicals have to be dosed. The oxidation process of Fe and Mn will be finished during passing of the detention tank- After oxidation the coarse formed particles can be easily removed due to fast sedimentation- The non- settled micro particles will be removed due to filtration. The suspended solid free permeate (filtered water) of the filtration step will be pumped to the final treatment step – reverse osmosis (RO).

Typical characteristic of deep ground water is the extremely low concentration of organic compounds. To the contrary, high concentrations of inorganic compounds, e.g. Fe and Mn, are the major focus of the pre-treatment. These inorganic compounds are dissolved and require therewith an oxidation to form suspended solids which can be separated by subsequent filtration process.