CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "waset.org",cType: 'non-interactive',cRay: '9134f7b5baf24709',cH: 'cAFktsNgTlSeW2.yJPutuCrwb_1GPzXV0xabxu.hsfw-1739786816-1.2.1.1-EjJto85GJDTNlUR94iCzmuduaWpA25of69LCCfreJrKH4Xmtv8sqnzuZFM9m2jwd',cUPMDTk: "\/wastewater-conference-in-april-2025-in-cancun?__cf_chl_tk=Q93jqRnJ.7HjuiUQWQZTDQQap8xXXF6kq4lq3XETr.4-1739786816-1.0.1.1-60x9oSpUmlyDDp4Q6Rf.nEhNMVVx7REmVFDZ0BtyjOs",cFPWv: 'b',cITimeS: '1739786816',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/wastewater-conference-in-april-2025-in-cancun?__cf_chl_f_tk=Q93jqRnJ.7HjuiUQWQZTDQQap8xXXF6kq4lq3XETr.4-1739786816-1.0.1.1-60x9oSpUmlyDDp4Q6Rf.nEhNMVVx7REmVFDZ0BtyjOs",md: "gD2ij9nLLYybsQrdtOBtjc24nyxe0QIkSuQUrSJsvI4-1739786816-1.2.1.1-RGX5BsZWcRRLRMJltn8CGWKwapnrv544neDh7wU_kcpZVJO4laQPCLVgADm0q91Pbfm9iSbUco8At_AFAUYRa5CB0DY8sGVg8iZfC3wNLxT6zO345BKgeak6N9BUFv_INisJBpm2RS4VctmVrQ94ubD3dm0k.f3f2eqRTDjKivKi2OXf1vH7._NeCQ2NRSoJII2XORJI2l1wPIIoHNaq6Genc_p8EgO861rBsjV11Qx3Pu7nMB3m.KfUn3ymuePjG.TFlOC8wMklGmPqgTdFz5YmHiE0TS_U2pH6Cm7mZWY7DxEzrmimKVsWMvprxIorvY.KVFQz0hdsZ9W7q0ts96VSpsxSrKGX0I1uUiUW_Dj4NHzF4PCW2UvcL2RXkp3fWIMoAlCtXOFtZZ.CzsE50uANHIcGD3hvBaj.6nWTqni6ZVAPbFBmBDsdAgaAQP9wRihcI_Fr4sv9eLEGK5RZ60cxwRJ7aWN_7QYiH5EhFq3N6hgZIuY6fULGzyuMXqmHndh.PY8K313MJ8c7S5fkRFHS5MAL0Y_Rjg1lfR_oBR1rAS8cpbFWPmEtTVnEi5dTxLvi4KB89pOw4Bt9vgTofp4nTMnMu_V8JjGc2yk8TLJD0iDzEdGygIqLaIPSgTIxzmOsGGgun4lkleN6ggc_gVXOWidwJHLcHOg0TuTR2jsR9emC1l2G963pU8OluOq0fCC8hg0UJ6lTUAYqxARoiueT_7pI7RVMPOGKCnDJYUmYB1cHLmepM.PgVP872pDN4AUKJyQRjifVh14N06mTqAaxtxRzX3iqK5sLKFKU.I2o.4TXzYGRScO172MmtkWGy_q.ysnI8Xik6UWeUBitpmCCcRMqCX7MhTMw3joFkDr9TeN.U9vVe353gIFwQ_zARIEdAa1WOuAx1hcXWmJOkaXbnnfda89AgPA0DykHsNBdH.fbYlWlKkYIP3JqUhD6neqXb41ipBvmP3ai1U2j_kliWQwClTYgu5SjQMtC4Muc_cYywAFUSlQ_cATBYPmGveW08tZTboWIrnJkA2EXiBoqjXFOsO3QIRXVQgJwClnN6IupoH2gG4Uhvj.78Cn65KQy4mV9IML4rHvlm7yLBdsiQ65_cJJOHeUxXeb6qisKogD59_IaO9.kGUIjMAbJOjvniZYacZM.UyiZy8_TIKGJtUwSY26u4iIiX8EwNlUWicq7g_U4mptuLXW3bMkNWDdxR6mEUxj4S1PuwqoEMl0Zo3xfBDAFabIpWhQFC0ps5y2XkLdy3L5WMXfIV5LUrF1A4P1wuYRetVd27Pj0dYH9AZn18t__cwNL7GMLZjipqJEI0jxiCGeljAfx_NWI0N_dlVummLdZQmNcDmmAin5ElDDhmqMLktNsrB97DFwbj0EXWQNphxFs_D9lXXpCBCIXv.fYUUhTjdzdzKT.v2w8EEq10LmaGc1VCWqsRZY72gA2Vaav8O0Vg7GW2mbxmAosgBlWkbMvGfraCQiDygiMLVGNz_UuXCMg_uQuxsyuMeail4OmHhXDerCEExhR0PnJT1z9TQdIzE1lmbxOjP6fOdToJza.IDYaQ5H1F8nkFdb9ndpNV5h9PTTUiBtl_48ag7YZgevKNl1tBxAmLRgAtPfzdmMdY.7J1GlherrlqRN79LXMrrdhevdpwBMXXBWBNUsZKb0LUc4m2fGKJf9FrMDc3ZcIH43KjVD5vgdsOAHEhnwW7WHf3RRvDQBetnXIwOaqSOcn1FW95WJJZb6wjDIU4A2Kyvu4.zrbLIkglcSlNXp8TMTRyxGHUrs_z40ujY_MdCUkUKAapkANDMmc7bXyN.2sNDGm0WaCpdjEhPtpEgG2jsJh5lFyxasyFP2CKdw27FJK7SgCDWhkiMjmDO4AcEkdF3.mnlmjEY7XlQglCoSXvDhfypDInbNKyi3FIAzCZafHaRjDfjIK3EHtlALTNUbrFEpg.zYV44w",mdrd: "8OGmQlNrFre.C.yE2NzQzJDcbE5Vl35BDahrpmlK4Ms-1739786816-1.2.1.1-08nGJ76CeUWKlwwIGzuixP6lBsuG08gc2EJ.8w8.Bts2qh0rBMIBbka7eyYrI1sQ0iot.o9vxFZOn7on3iWGI.G9NE0VPyLAoIJDnvdQEzOdJQ6w33kUHJ4oGWxicKdyVqONiPDSsTgnAmxQowOLVKk9PyGG_kdBSQ.nsVJBNCTHLjx4eoGLwAJNHkSZ2A58YoOzQ1KrvFaFvzIjKRtril1u3qzMFhY2HptNqmAExUW0fWEalIO7cV.p3_z6qcPlsYbAvQqLPiMHPK7U_gDF2flLejwdrtanpd8YttLqCjV_GYxunUdcT6OgyfZkq5B6pEjv8lufE2XPmWSunj9N..W9ZC1ZZtsi7aAYv7Ig8ZaJmRKy0bEpbMacg_242syWoSNfMzZZluhOn5O2nqSjjVyiTGFdRzTRnBk72TY.fWePK9wWs2aJKMEwZRCGNpCvLI5poF0kTsXP6r3UkHufmCMglx6ePHyg1hw4jvpNraJtAqfs7XR3Gh3NvQz3YSiwLDaW_TySEEoG6ZJlx.Or57GKGyWii16jreEKn5Npq_CNC4rFhx1F3reGy5XHGg7iuAZWSz215M1wHFlkDDVAEtuovtsP99870TNN4e5NGWTfCY3sdE7ag2p0H8B5UcoNe4D2NZpr59rxVdsxmGo_JizXhxCK5xpVKm4gdCnBG241_cye_N_0SIQG9BCabLVie_SCVSK57Hx5LT.r.iguVOVqmIioal_Fm7nXt_WquOkQaepXSXOa8dr9YsDvctAHb3mP4bfzPnd0K5V2XK3O3hn3GZ0zDqUC1fKeTSj00K1zFOtlh3Eu3tHBnV.pvNwRClXUQ.07e8wyYP_2fRousOVANtddbFp0V8GnseCFAJ9FoY.2Db2Czbbilfg3cevhXsb6kQzbCSV1YYHikMKthyP5oI8sqe8CqB3i4RBlsz4gqHxpi4m_cSq9iAhEUhNvvBcPywD5ft8ksOWq71yzy8EousoRjMtmgkzje71A1ndh_o3XPIA5U7D4rghkljywoFVczuEQb1Jd2UHUyaYpEBuddhMxi1n36SdqCWDmg93ohj8pG7meVGoC0od0OJYN8tA9MxpMim0EDi0KsL2n_BMGoK9PaS112mu6hXbbRfOTyPro1KUDxGYkj4OEBbqzPuoWma2t6Dnd.Mv6WfmoEi2seJU7LfiK2PEC74cQ1Q5PzJUd0ZSkLwtlViGqvlMZK6Psvflkf0behh39nG96.zMq8Fz4HYYkSt0vXG6NBfjt47iOPhoyVNCusBNR7hKE9JCb8n7TeMPKnyooDv7bASuFddIuXkGjWLLVzK.V1DuKe6fRD2jTEVjJo3haNYzORj3yOOJ2CckHEtlXli94orRrG81vYfmQE4sdMydjsX4nAXyhKFuH9Qjv_r7RgO6YgEZjAMUPT81GmO.VeGvvHbi7uaSsPNpfbQugi_YNA0r6r1OJKiIeuyBsHq0u0uyP77DYFXSF4.rLZfTd_iQR9nGKtpWK5Z6Bvqm5suUzgjqXgl5m80shhnPhzvnNNKw.Jh3KYwNlCKKZYfTlgoApv6UsyvaeSj_xEjQhd_uf0xkXESmSJcmsLLYL.h0kkclXeKF9jiNuQPbjbr00TfYvvH2UP_9FhdAgZKpsmTOLZ0ls3IaLLJVtx0f0.6x.VqGJTzsGZ9jaAeBbFn9JzGKDaafZwmC8RpuaVGuJWkItHQZWOkwvKAdkXP8a0jn42_.9VScbkDNW2D.QW06FdvDC5tvLUwdpHCOlEBy_oGSrp_BC.Kxr6atNDIoMifBVYiT3ETu0sdxrVf9nT_6YgMfx.gHg8SQBINynA8kocAR4d65tk36tRxCXEoFpdo.IzcdpBS4IPh6F2Wxh0jj9G8xtYI_434kduqCQucpIeoBK0GXVPHaHSLstnxtxmLXZ2lEX_h8K7Yor5VRtEWYgautFN4bdf9WtKdq4zhl6H4s_pD.U7y9se7tBb_16_ho6jUHl"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9134f7b5baf24709';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/wastewater-conference-in-april-2025-in-cancun?__cf_chl_rt_tk=Q93jqRnJ.7HjuiUQWQZTDQQap8xXXF6kq4lq3XETr.4-1739786816-1.0.1.1-60x9oSpUmlyDDp4Q6Rf.nEhNMVVx7REmVFDZ0BtyjOs" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>