{"id":19070,"date":"2025-08-20T14:57:05","date_gmt":"2025-08-20T06:57:05","guid":{"rendered":"https:\/\/stark-water.com\/?page_id=19070"},"modified":"2025-08-22T14:39:54","modified_gmt":"2025-08-22T06:39:54","slug":"waterzuiveringscalculators","status":"publish","type":"page","link":"https:\/\/stark-water.com\/nl\/waterzuiveringscalculators\/","title":{"rendered":"Stark Watergereedschap"},"content":{"rendered":"<style>\n\/* --- Stark Water Tools Hub (scoped) --- *\/\n#toolshub{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial,sans-serif;max-width:1100px;margin:0 auto;padding:8px 4px}\n#toolshub h1{font-size:28px;margin:6px 0 8px}\n#toolshub .sub{color:#64748b;font-size:14px;margin-bottom:14px}\n#toolshub .sticky{position:sticky;top:0;z-index:5;background:#fff;padding:8px 0;border-bottom:1px solid #eee}\n#toolshub .bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}\n#toolshub .hub-chip{padding:8px 12px;border:1px solid #cbd5e1;border-radius:999px;cursor:pointer;background:#fff;color:#0f172a;font-size:14px;line-height:1}\n#toolshub .hub-chip.active{background:#0f172a;color:#fff;border-color:#0f172a}\n#toolshub .search{margin-left:auto;display:flex;gap:8px;align-items:center}\n#toolshub .search input{padding:8px 10px;border:1px solid #cbd5e1;border-radius:10px;min-width:220px}\n#toolshub .grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:14px}\n#toolshub .card{border:1px solid #e5e7eb;border-radius:14px;padding:14px;background:#fff;display:flex;flex-direction:column}\n#toolshub .card h3{font-size:18px;margin:0 0 6px;color:#0f172a}\n#toolshub .card p{font-size:14px;color:#475569;margin:0 0 10px}\n#toolshub .meta{font-size:12px;color:#64748b;margin-top:auto}\n#toolshub .cta{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}\n#toolshub .btn{padding:8px 12px;border:1px solid #0f172a;border-radius:10px;background:#0f172a;color:#fff;text-align:center;text-decoration:none;display:inline-block}\n#toolshub .btn.alt{background:#fff;color:#0f172a}\n@media(max-width:1000px){#toolshub .grid{grid-template-columns:repeat(2,minmax(0,1fr))}}\n@media(max-width:640px){#toolshub .grid{grid-template-columns:1fr} #toolshub .search{width:100%;margin-left:0}}\n<\/style>\n\n<div id=\"toolshub\" aria-label=\"Stark Water Tools Hub\">\n  <h1>Stark Watergereedschap<\/h1>\n  <div class=\"sub\">Free, engineer-friendly calculators for sizing, OPEX and water quality. Filter by category or search by name.<\/div>\n\n  <div class=\"sticky\">\n    <div class=\"bar\">\n      <button class=\"hub-chip active\" data-filter=\"all\">All<\/button>\n      <button class=\"hub-chip\" data-filter=\"economics\">Economics<\/button>\n      <button class=\"hub-chip\" data-filter=\"sizing\">Sizing<\/button>\n      <button class=\"hub-chip\" data-filter=\"quality\">Water Quality<\/button>\n      <button class=\"hub-chip\" data-filter=\"process\">Proces<\/button>\n      <div class=\"search\">\n        <input id=\"toolSearch\" placeholder=\"Search tools\u2026 (e.g., OPEX, LSI, sizing)\" aria-label=\"Search tools\">\n      <\/div>\n    <\/div>\n  <\/div>\n\n  <div class=\"grid\" id=\"toolGrid\">\n    <!-- OPEX -->\n    <div class=\"card\" data-cat=\"economics\" data-name=\"ro opex calculator universal cost energy chemicals cip membrane\">\n      <h3>RO OPEX-calculator (Universeel)<\/h3>\n      <p>Estimate monthly OPEX for brackish, seawater or polishing RO. Profiles, CSV export and shareable URL.<\/p>\n      <div class=\"cta\">\n        <a class=\"btn\" href=\"https:\/\/stark-water.com\/nl\/waterzuiveringscalculators\/ro-opex-calculator\/\">Open calculator<\/a>\n        <a class=\"btn alt\" href=\"\/nl\/oplossing\/1000lph-ro-solution\/\">Related solution<\/a>\n      <\/div>\n      <div class=\"meta\">Category: Economics \u2022 Event: ro_opex_calculated<\/div>\n    <\/div>\n\n    <!-- RO Sizing -->\n    <div class=\"card\" data-cat=\"sizing\" data-name=\"ro sizing 4040 8040 flux elements selection\">\n      <h3>RO Sizing Wizard (4040\/8040)<\/h3>\n      <p>Quick estimate of elements and operating flux for small RO skids. 4040\/8040 with editable membrane area.<\/p>\n      <div class=\"cta\">\n        <a class=\"btn\" href=\"https:\/\/stark-water.com\/nl\/waterzuiveringscalculators\/ro-sizing\/\">Open calculator<\/a>\n        <a class=\"btn alt\" href=\"\/nl\/product\/1000l-omgekeerd-osmose-systeem\/\">Related product<\/a>\n      <\/div>\n      <div class=\"meta\">Category: Sizing \u2022 Event: ro_sizing_calculated<\/div>\n    <\/div>\n\n    <!-- LSI -->\n    <div class=\"card\" data-cat=\"quality\" data-name=\"lsi calculator scaling corrosion index\">\n      <h3>LSI-rekenmachine<\/h3>\n      <p>Compute Langelier Saturation Index from pH, temperature, TDS, calcium hardness and alkalinity.<\/p>\n      <div class=\"cta\">\n        <a class=\"btn\" href=\"https:\/\/stark-water.com\/nl\/waterzuiveringscalculators\/lsi-calculator\/\">Open calculator<\/a>\n        <a class=\"btn alt\" href=\"\/nl\/blog\/brakwater-ro-ontwerp-1000lph\/\">Related guide<\/a>\n      <\/div>\n      <div class=\"meta\">Category: Water Quality \u2022 Event: ro_lsi_calculated<\/div>\n    <\/div>\n\n    <!-- Blending -->\n    <div class=\"card\" data-cat=\"process\" data-name=\"blending permeate mix conductivity tds target\">\n      <h3>Berekenen van permeaatmenging<\/h3>\n      <p>Blend raw and permeate to a target conductivity\/TDS; returns permeate fraction and split flows.<\/p>\n      <div class=\"cta\">\n        <a class=\"btn\" href=\"https:\/\/stark-water.com\/nl\/waterzuiveringscalculators\/blending-calculator\/\">Open calculator<\/a>\n        <a class=\"btn alt\" href=\"\/nl\/oplossing\/1000lph-ro-solution\/\">Related solution<\/a>\n      <\/div>\n      <div class=\"meta\">Category: Process \u2022 Event: ro_blend_calculated<\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<script>\n(function(){\n  const hub=document.getElementById('toolshub');\n  if(!hub) return;\n  const chips=hub.querySelectorAll('.hub-chip');\n  const cards=hub.querySelectorAll('.card');\n  const search=document.getElementById('toolSearch');\n\n  function applyFilter(cat){\n    chips.forEach(c=>c.classList.toggle('active', c.dataset.filter===cat));\n    const q=(search.value||'').toLowerCase().trim();\n    cards.forEach(card=>{\n      const byCat=(cat==='all')||(card.dataset.cat===cat);\n      const bySearch= !q || (card.dataset.name||'').toLowerCase().includes(q);\n      card.style.display=(byCat && bySearch)?'':'none';\n    });\n  }\n  chips.forEach(c=>c.addEventListener('click',()=>applyFilter(c.dataset.filter)));\n  search.addEventListener('input',()=>applyFilter(hub.querySelector('.hub-chip.active').dataset.filter));\n  applyFilter('all');\n\n  \/\/ GA4 event (optional)\n  hub.querySelectorAll('.card .btn').forEach(btn=>{\n    btn.addEventListener('click',e=>{\n      const card=e.currentTarget.closest('.card');\n      window.dataLayer=window.dataLayer||[];\n      window.dataLayer.push({event:'tool_click', tool:card.querySelector('h3').textContent, href:e.currentTarget.href});\n    });\n  });\n})();\n<\/script>\n\n\n\n\n\n<script type=\"application\/ld+json\">\n{\n \"@context\":\"https:\/\/schema.org\",\n \"@type\":\"CollectionPage\",\n \"name\":\"Stark Water Tools\",\n \"description\":\"Free industrial water treatment calculators for sizing, OPEX and water quality.\",\n \"mainEntity\": {\n   \"@type\":\"ItemList\",\n   \"itemListElement\": [\n     {\"@type\":\"ListItem\",\"position\":1,\"url\":\"https:\/\/stark-water.com\/stark-water-tools\/ro-opex-calculator\/\"},\n     {\"@type\":\"ListItem\",\"position\":2,\"url\":\"https:\/\/stark-water.com\/stark-water-tools\/ro-sizing\/\"},\n     {\"@type\":\"ListItem\",\"position\":3,\"url\":\"https:\/\/stark-water.com\/stark-water-tools\/lsi-calculator\/\"},\n     {\"@type\":\"ListItem\",\"position\":4,\"url\":\"https:\/\/stark-water.com\/stark-water-tools\/blending-calculator\/\"}\n   ]\n }\n}\n<\/script>\n\n\n\n<script type=\"application\/ld+json\">\n{\n \"@context\":\"https:\/\/schema.org\",\n \"@type\":\"CollectionPage\",\n \"name\":\"Stark Water Tools\",\n \"description\":\"Free industrial water treatment calculators for sizing, OPEX and water quality.\",\n \"mainEntity\":{\n   \"@type\":\"ItemList\",\n   \"itemListElement\":[\n     {\"@type\":\"ListItem\",\"position\":1,\"url\":\"https:\/\/stark-water.com\/stark-water-tools\/stark-water-tools-ro-opex-calculator\/\"},\n     {\"@type\":\"ListItem\",\"position\":2,\"url\":\"https:\/\/stark-water.com\/stark-water-tools\/stark-water-tools-ro-sizing\/\"},\n     {\"@type\":\"ListItem\",\"position\":3,\"url\":\"https:\/\/stark-water.com\/stark-water-tools\/stark-water-tools-lsi-calculator\/\"},\n     {\"@type\":\"ListItem\",\"position\":4,\"url\":\"https:\/\/stark-water.com\/stark-water-tools\/blending-calculator\/\"}\n   ]\n }\n}\n<\/script>\n\n\n\n<section aria-label=\"About Stark Water Tools\">\n  <h2>Water treatment calculators you can use today<\/h2>\n  <p><strong>Water treatment calculators<\/strong> make early decisions fast and transparent. <strong>Stark Watergereedschap<\/strong> bundles four practical calculators you can open in one click: a universal <a href=\"https:\/\/stark-water.com\/nl\/stark-water-tools\/stark-water-tools-ro-opex-calculator\/\">RO OPEX calculator<\/a>, an <a href=\"https:\/\/stark-water.com\/nl\/stark-water-tools\/stark-water-tools-ro-sizing\/\">RO sizing wizard (4040\/8040)<\/a>, an <a href=\"https:\/\/stark-water.com\/nl\/stark-water-tools\/stark-water-tools-lsi-calculator\/\">LSI calculator<\/a>, and a <a href=\"https:\/\/stark-water.com\/nl\/stark-water-tools\/blending-calculator\/\">permeate blending calculator<\/a>. Each tool supports shareable links and CSV export so your team can review the same inputs and results.<\/p>\n\n  <h2>Who benefits from these water treatment calculators<\/h2>\n  <ul>\n    <li><strong>Process &#038; project engineers<\/strong> \u2013 compare options with clear assumptions and exportable numbers.<\/li>\n    <li><strong>Plant owners &#038; buyers<\/strong> \u2013 understand OPEX drivers (energy, chemicals, membranes, CIP) before RFQ.<\/li>\n    <li><strong>Operators<\/strong> \u2013 check scaling risk with LSI, set realistic recovery, and blend permeate to a target conductivity\/TDS.<\/li>\n  <\/ul>\n\n  <h2>How to use the calculators effectively<\/h2>\n  <ol>\n    <li><strong>Start with recent feed data<\/strong> (TDS\/SDI\/pH\/temperature). Seasonal changes matter.<\/li>\n    <li><strong>Document assumptions<\/strong> inside each calculator (hours\/day, days\/month, chemical dose, membrane life).<\/li>\n    <li><strong>Share and iterate<\/strong> with the built-in shareable URL and CSV export; decisions improve when assumptions are explicit.<\/li>\n  <\/ol>\n\n  <h2>Notes on LSI and good practice<\/h2>\n  <p>LSI is an empirical indicator of scaling\/corrosion tendency and is temperature-dependent. Use it together with antiscalant design and trend data. A concise reference is the Langelier Saturation Index overview (<a href=\"https:\/\/en.wikipedia.org\/wiki\/Langelier_saturation_index\" rel=\"nofollow noopener\" target=\"_blank\">background reading<\/a>).<\/p>\n\n  <h2>From calculators to configured packages<\/h2>\n  <p>If you need a configured reference to start from, see our <a href=\"\/nl\/oplossing\/1000lph-ro-solution\/\">1000 LPH RO water treatment solution<\/a> and the <a href=\"\/nl\/product\/1000l-omgekeerd-osmose-systeem\/\">1000 LPH RO system<\/a>. Use the results from the <em>waterzuiveringscalculators<\/em> to align on scope, then finalize with vendor datasheets and projection software.<\/p>\n<\/section>\n\n\n\n<section aria-label=\"About Stark Water Tools\">\n  <h2>What you can do here<\/h2>\n  <p><strong>Stark Watergereedschap<\/strong> is a compact library of <em>waterzuiveringscalculators<\/em> for engineers and buyers. It currently includes a universal <a href=\"\/nl\/stark-water-tools\/stark-water-tools-ro-opex-calculator\/\">RO OPEX calculator<\/a>, an <a href=\"\/nl\/stark-water-tools\/stark-water-tools-ro-sizing\/\">RO sizing wizard (4040\/8040)<\/a>, an <a href=\"\/nl\/stark-water-tools\/stark-water-tools-lsi-calculator\/\">LSI calculator<\/a>, and a <a href=\"\/nl\/stark-water-tools\/blending-calculator\/\">permeate blending calculator<\/a>. Each tool supports shareable links and CSV export.<\/p>\n\n  <h2>Who these calculators help<\/h2>\n  <ul>\n    <li><strong>Process &#038; project engineers<\/strong> \u2013 quick, transparent estimates to compare options and communicate assumptions.<\/li>\n    <li><strong>Plant owners &#038; buyers<\/strong> \u2013 understand cost drivers (energy, chemicals, membranes, CIP) before RFQ.<\/li>\n    <li><strong>Operators<\/strong> \u2013 check scaling risk (LSI), set realistic recovery and plan blending to hit a target conductivity\/TDS.<\/li>\n  <\/ul>\n\n  <h2>Assumptions and good practice<\/h2>\n  <ul>\n    <li>Results are <em>indicative<\/em>. Always validate with recent feed data (TDS\/SDI\/pH\/temp) and site utilities.<\/li>\n    <li>LSI is an empirical indicator. Combine with trend data, antiscalant design and seasonal operation windows.<\/li>\n    <li>Use the <a href=\"\/nl\/stark-water-tools\/stark-water-tools-ro-sizing\/\">RO sizing<\/a> output as a starting point, then refine with vendor datasheets and pilot results.<\/li>\n  <\/ul>\n\n  <p>Looking for a configured package? See our reference <a href=\"\/nl\/oplossing\/1000lph-ro-solution\/\">1000 LPH RO water treatment solution<\/a> en <a href=\"\/nl\/product\/1000l-omgekeerd-osmose-systeem\/\">1000 LPH RO system<\/a>.<\/p>\n<\/section>\n\n<section aria-label=\"FAQ\">\n  <h2>FAQ<\/h2>\n  <h3>Do I need brand-specific membrane data for the sizing wizard?<\/h3>\n  <p>No. The wizard gives a first-pass estimate (4040\/8040) using typical membrane areas and flux. Final design should use the selected vendor\u2019s projection software.<\/p>\n\n  <h3>Why does the OPEX calculator ask for CIP frequency and membrane lifetime?<\/h3>\n  <p>Because monthly cost is sensitive to cleanings and amortization. Enter realistic values based on SDI, seasonality and operating hours.<\/p>\n\n  <h3>How should I interpret LSI?<\/h3>\n  <p>LSI &gt; 0 indicates scaling tendency; LSI &lt; 0 indicates corrosive tendency. Keep in mind it is temperature-dependent and empirical\u2014use it with antiscalant design and trend data.<\/p>\n\n  <h3>Can I share my inputs with colleagues?<\/h3>\n  <p>Yes. Every calculator supports a shareable URL (we copy it to your clipboard) and a CSV download for records.<\/p>\n<\/section>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\":\"https:\/\/schema.org\",\n  \"@type\":\"FAQPage\",\n  \"mainEntity\":[\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Do I need brand-specific membrane data for the sizing wizard?\",\n      \"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. The wizard provides a first-pass estimate (4040\/8040) using typical membrane areas and flux. Final design should be verified with the selected vendor\u2019s projection software.\"}\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Why does the OPEX calculator ask for CIP frequency and membrane lifetime?\",\n      \"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Monthly OPEX is sensitive to cleanings and membrane amortization. Enter realistic values based on SDI, seasonality and operating hours.\"}\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"How should I interpret LSI?\",\n      \"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"LSI > 0 indicates scaling tendency; LSI < 0 indicates corrosive tendency. It is empirical and temperature-dependent, so combine with antiscalant design and trend data.\"}\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Can I share my calculator inputs?\",\n      \"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Each calculator supports a shareable URL and CSV export so you can compare and keep records.\"}\n    }\n  ]\n}\n<\/script>\n\n\n\n<script type=\"application\/ld+json\">\n{\n  \"@context\":\"https:\/\/schema.org\",\n  \"@type\":\"FAQPage\",\n  \"mainEntity\":[\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Do these water treatment calculators replace vendor projection software?\",\n      \"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No. They provide first-pass engineering estimates to align assumptions quickly. Final design should be validated with vendor datasheets and projection tools.\"}\n    },\n    {\n      \"@type\":\"Question\",\n      \"name\":\"Can I share inputs and results with my team?\",\n      \"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. 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All [&hellip;]<\/p>","protected":false},"author":1,"featured_media":19144,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_joinchat":[],"footnotes":""},"class_list":["post-19070","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/pages\/19070","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/comments?post=19070"}],"version-history":[{"count":10,"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/pages\/19070\/revisions"}],"predecessor-version":[{"id":20403,"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/pages\/19070\/revisions\/20403"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/media\/19144"}],"wp:attachment":[{"href":"https:\/\/stark-water.com\/nl\/wp-json\/wp\/v2\/media?parent=19070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}