{"id":1117,"date":"2021-08-24T00:00:39","date_gmt":"2021-08-24T00:00:39","guid":{"rendered":"https:\/\/saniwater.com\/?p=6795"},"modified":"2021-08-24T00:00:39","modified_gmt":"2021-08-24T00:00:39","slug":"residential-greywater-series-overview-of-treatment-technologies","status":"publish","type":"post","link":"https:\/\/saniservice.com\/blog\/residential-greywater-series-overview-of-treatment-technologies\/","title":{"rendered":"Residential Greywater Series: Overview Of Treatment Technologies"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Greywater is the domestic wastewater from all sources except the toilets or sewer. As per the U.S. EPA wastewater sources can include <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> from:\u00a0<\/span><\/p>\n<ul style=\"margin-left: 7%;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Laundry<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Shower\/bath\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Washing machines\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dishwasher\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Kitchen sinks<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6798 lazyload\" data-src=\"https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image3-1.png\" alt=\"\" width=\"679\" height=\"592\" data-srcset=\"https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image3-1.png 679w, https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image3-1-300x262.png 300w\" data-sizes=\"auto, (max-width: 679px) 100vw, 679px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 679px; --smush-placeholder-aspect-ratio: 679\/592;\" \/><\/p>\n<p><b>Figure 1 \u2013 Residential Greywater System<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Although both greywater and blackwater are types of wastewater, the primary difference between greywater and blackwater is that blackwater includes urine and fecal matter and is thus considered sewage <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a>. Black <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> is extremely difficult to filter at home to obtain clean <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> for reuse purposes as this sewage <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> contains harmful bacteria and disease-causing pathogens, since greywater does not contain fecal matter, it can be filtered and cleaned for reuse in garden or irrigation purposes. Due to the low levels of contaminating pathogens and nitrogen, reuse and recycling of greywater is receiving more and more attention.<\/span> <b>Greywater recycling is an economical method to help consumers reuse wastewater generated at home and thus facilitate <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> conservations.\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">This episode provides an overview to Residential Greywater Treatment Technologies for beneficial reuse thus demonstrating its significance as a sustainable solution to the emerging <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> crisis in UAE. It is the second part of a <\/span><b><i>series titled \u201cResidential Greywater Series\u201d by Sani <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">Water<\/a>. <\/i><\/b><span style=\"font-weight: 400;\">Sani <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">Water<\/a> has been at the forefront of providing their customers with the latest products and advanced <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> treatment technologies available in the drinking <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> industry. With <\/span><b><i>\u201cResidential Greywater Series\u201d, Sani <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">Water<\/a> aims to educate and inform their customers about the fundamentals of residential greywater, its environmental reuse benefits, and some of the most popular methods of residential greywater reuse available in the market today. <\/i><\/b><\/p>\n<p>&nbsp;<\/p>\n<p><b>REFLECTION POINTS <\/b><\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6796 lazyload\" data-src=\"https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image1-3.png\" alt=\"\" width=\"618\" height=\"491\" data-srcset=\"https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image1-3.png 618w, https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image1-3-300x238.png 300w\" data-sizes=\"auto, (max-width: 618px) 100vw, 618px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 618px; --smush-placeholder-aspect-ratio: 618\/491;\" \/><\/p>\n<p>&nbsp;<\/p>\n<p><b>IMPORTANCE OF GREYWATER TREATMENT<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The reclaimed or treated greywater should fulfill four primary criteria \u2013 hygienic safety, aesthetics, environmental tolerance, and economic feasibility. Although greywater is not odorous immediately after discharge, prolonged storage of greywater in tanks will result in development of anaerobic conditions. Once it reaches the septic state, greywater forms sludge that either sinks or floats depending on its gas content and density. Septic greywater can be as foul smelling as any sewage and will also contain anaerobic bacteria, some of which could include human pathogens. Consequently, the key to successful greywater treatment lies in its immediate processing and reuse before it reaches the anaerobic state. The simplest, most appropriate treatment consists of directly introducing freshly generated greywater. There are four reasons why greywater may need to be treated for the following purposes:<\/span><\/p>\n<ul style=\"margin-left: 7%;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Removal of substances that may be harmful to human health.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Removal of substances that may be harmful to plants and soil.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Removal of substances that may be harmful to the environment.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Removal of substances that may clog the irrigation system.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><b>TYPES OF TREATMENT TECHNOLOGIES\u00a0<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Greywater reuse treatment technologies can range from low-cost methods, such as primary treatment methods that coarsely screen oils\/grease and solids from the greywater before irrigation, to more expensive secondary treatment systems that treat and disinfect the greywater to a high standard before using it for irrigation spray systems, or for toilet flushing. The choice of system depends on a number of factors including:<\/span><\/p>\n<ul style=\"margin-left: 7%;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The owners\u2019 willingness to operate and maintain the facility;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The source of greywater to be recycled;<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The purpose of the greywater reuse (whether for subsurface irrigation or <\/span>sprinkler irrigation or for toilet flushing or waterfalls).<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">There are two main types of treatment systems \u2013 Primary Diversion Systems and Secondary Treatment Systems.<\/span><\/p>\n<p><b>Primary Diversion Systems<\/b><span style=\"font-weight: 400;\">: Primary diversion methods use coarse screen filters or sedimentation to remove oils\/grease and solids prior to discharge to the land application areas. These systems are likely to be considered the most economically attractive for greywater use because maintenance can usually be carried out by the homeowner, and they generally do not rely heavily on electricity or chemicals to operate. These include the <\/span><i><span style=\"font-weight: 400;\">gravity diversion system<\/span><\/i><span style=\"font-weight: 400;\"> and the <\/span><i><span style=\"font-weight: 400;\">pump diversion system<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6797 lazyload\" data-src=\"https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image2-1.png\" alt=\"\" width=\"534\" height=\"392\" data-srcset=\"https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image2-1.png 534w, https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image2-1-300x220.png 300w\" data-sizes=\"auto, (max-width: 534px) 100vw, 534px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 534px; --smush-placeholder-aspect-ratio: 534\/392;\" \/><\/p>\n<p><b>Figure 2. Gravity System with potable tanks\u00a0<\/b><\/p>\n<p>&nbsp;<\/p>\n<p><b>Secondary Treatment Systems<\/b><span style=\"font-weight: 400;\">: Secondary treatment systems further treat the greywater to remove more of the oils\/ grease, solids and organic material. This allows secondary treated greywater to be irrigated via micro-drip or surface irrigation methods. These systems are generally more expensive due to the initial establishment costs associated with the continuing treatment needs and ongoing maintenance costs. However, the treatment level enables a much more conventional surface irrigation system and presents less of a health risk in case of human contact. There are many types of secondary treatment systems, including: <\/span><i><span style=\"font-weight: 400;\">slow sand filter, activated sludge, constructed wetland, trickling filter and rotating biological contactor<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6801 lazyload\" data-src=\"https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image6.png\" alt=\"\" width=\"554\" height=\"367\" data-srcset=\"https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image6.png 554w, https:\/\/saniwater.com\/wp-content\/uploads\/2021\/08\/image6-300x199.png 300w\" data-sizes=\"auto, (max-width: 554px) 100vw, 554px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 554px; --smush-placeholder-aspect-ratio: 554\/367;\" \/><\/p>\n<p><b>Figure 3. Greywater collection, treatment and reuse for toilet flushing and outdoors<\/b><\/p>\n<p>&nbsp;<\/p>\n<p><b>REFERENCES<\/b><\/p>\n<ol style=\"margin-left: 7%;\">\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Li, F., Wichmann, K., &amp; Otterpohl, R. (2009). Review of the technological approaches for grey <a href=\"https:\/\/sanih2o.com\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"Water\">water<\/a> treatment and reuses.\u00a0<\/span><i><span style=\"font-weight: 400;\">Science of the total environment<\/span><\/i><span style=\"font-weight: 400;\">,\u00a0<\/span><i><span style=\"font-weight: 400;\">407<\/span><\/i><span style=\"font-weight: 400;\">(11), 3439-3449.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">World Health Organization. (2006).\u00a0<\/span><i><span style=\"font-weight: 400;\">Overview of greywater management health considerations<\/span><\/i><span style=\"font-weight: 400;\">\u00a0(No. WHO-EM\/CEH\/125\/E).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">https:\/\/energy.ces.ncsu.edu\/greywater-defined\/<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">https:\/\/greywateraction.org\/residential-greywater-system-study\/<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">https:\/\/waterwisegroup.com\/greywater-education\/what-is-greywater\/<\/span><\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>The post <a rel=\"nofollow noopener\" href=\"https:\/\/saniwater.com\/residential-greywater-series-overview-of-treatment-technologies\/\" target=\"_blank\">&lt;span style=&quot;color: #4690cd;&quot;&gt;R&lt;\/span&gt;esidential Greywater Series: Overview Of Treatment Technologies<\/a> appeared first on <a rel=\"nofollow noopener\" href=\"https:\/\/saniwater.com\" target=\"_blank\">SaniWater<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Greywater is the domestic wastewater from all sources except the toilets or sewer. As per the U.S. EPA wastewater sources can include water from:\u00a0 Laundry Shower\/bath\u00a0 Washing machines\u00a0 Dishwasher\u00a0 Kitchen<\/p>\n","protected":false},"author":1,"featured_media":1118,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[137],"tags":[],"class_list":["post-1117","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-water-disinfection"],"_links":{"self":[{"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/posts\/1117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/comments?post=1117"}],"version-history":[{"count":0,"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/posts\/1117\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/media\/1118"}],"wp:attachment":[{"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/media?parent=1117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/categories?post=1117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/saniservice.com\/blog\/wp-json\/wp\/v2\/tags?post=1117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}