Activated Filter Media – Cost Savings and Sustainability in Retrofit & Greenfield Media Filtration BWRO and SWRO Pretreatment

Activated Glass Filter Media – Cost Savings and Sustainability in Retrofit & Greenfield of BWRO & SWRO Media Filtration Pre-Treatment Jochen Kallenberg, Dryden Aqua – 06. Silica (SiO ) Based Filtration Technologies Silicon Carbid Glass Filter Media Silica Sand (SiC) Membranes 3 Manufacturing – Activated Glass Media Rainwater Collection 100% solar power Dryer Glass Media filters Spiral washer Metal, paper and plastics Maximum loose organic Decantatio Recycled are removed contamination less than n bottled 10g/ton Sludge sent to glass biogas company 4 PAFrMop® e- Brtioiefosu lAincgt irveasitsetadn tG &l ainscrse aMseedd siuarface area Water molecules and dissolved oxygen Transformed into free hydroxy radicals Biofouling Increased surface area Resistant Surface Superior mechanical No biofouling filtration 6 Properties Activated Glass Media AFM® – Negative (polar) & hydrophobic (non-polar) surface Hydrophobic Negative Charge Hydrocarbons Heavy metals Microplastics 4µm particles, 1µm particles, up to 95% removal up to 95% removal Negative Charged Non-polar Polar Hydrophobi Repels water Loves water c Likes other Likes other hydrophobic hydrophilic molecules molecules Negative charged 7 SWRO pressure media filter pretreatment Pressurized filtration (18 units, 13.4 m x 2,5 m diameter) 0.5-1.0 mm silica sand, 1000mm depth (UC 1.44 and ES 0.62mm) 10 cartridge filters (each 224 cartridge filters, 5 micron nominal) This actual media filtration doesn’t supply water with enough quality and quantity, so the plant can´t work at full capacity. 18 SWRO media filtration pretreatment validation MGD (65’000m3/d) SWRO in Spain plant receives water with very low quality, from high numbers of fine suspended inorganic solids, mainly clay and silt. Different media filtration pilot plants have been installed to determine the best pretreatment 19 Consequently, the media filtration pilot study focuses on fine particles removal. Conclusions High amounts of low size particles (bellow 1 micron) can be retained in a filter media that contains Activated Glass Media Activated Glass Media provides the best combined performance in terms of water quality by SDI-15 between 1-1.5 and higher particle retention percentage at filtration velocities up to 5 gpm/ft2 12 m/h. Conclusions – Media Testing In terms of filtration capacity, a filter media combination of sand, anthracite and garnet provides higher a filtration capacity, but at considerably lower filtration (SDI-15) Selection of the right size of media grains is crucial to get the best performance combination in terms of filtrated water quality and amount of filtrated water between backwashes. Sustainability Activated Glass Media Made from Re/Upcycled Bottled Glass  Waste to Value Manufacturing using 100% Solar Energy Use of Rainwater & Water Reuse (washing/cleaning process)  WaterPositive Used AFM can be returned to our factories and is recycled and reused  Circular Economy 28.