{"id":3661,"date":"2021-02-24T11:01:56","date_gmt":"2021-02-24T10:01:56","guid":{"rendered":"https:\/\/silgagalvanica.com\/watchword-eco-sustainability\/"},"modified":"2023-08-23T12:37:11","modified_gmt":"2023-08-23T10:37:11","slug":"watchword-eco-sustainability","status":"publish","type":"post","link":"https:\/\/silgagalvanica.com\/fr\/watchword-eco-sustainability\/","title":{"rendered":"Watchword: eco-sustainability"},"content":{"rendered":"<section class=\"wpb-content-wrapper\"><p>[vc_row][vc_column][vc_column_text]<\/p>\n<h2>Silga, almost the first in Europe to invest in biological wastewater treatment<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-2389 alignright\" src=\"https:\/\/silgagalvanica.com\/wp-content\/uploads\/foto-al-microscopio-del-fango-attivo.-Messa-a-fuoco-su-un-protozoo-2.png\" alt=\"\" width=\"360\" height=\"407\" \/>The biological industrial waste water treatment plant was necessary for the removal of nitrogenous compounds. The existing chemical-physical purification plant was indispensable for removal of heavy metals and toxic substances (such as cyanides), but it was unable to bring us within the legislative parameters for nitrogen compounds, such as ammoniacal nitrogen (the limit is 30ppm), nitric nitrogen (30ppm limit) and nitrous nitrogen (0.6ppm limit).<br \/>\nBiological plants have always been used for the treatment of municipal wastewater, or wastewater from the food industry, because they have a high input of organic substances, a fairly constant flow and pollutant load, and essentially no toxins.<br \/>\nThese conditions are important for the success of the nitrogen and phosphorus removal process, control parameters for areas defined as \u00ab\u00a0sensitive\u00a0\u00bb. These conditions are difficult to meet for an industrial metal treatment effluent. In fact, an excess of hypochlorite or sodium sulphide (used respectively for neutralising cyanides and precipitating metals) would be enough to annihilate or otherwise compromise the bacterial activity underlying the process. Not to mention the fluctuations in pH, temperature and flow rate to which galvanic industrial wastewater is naturally predisposed.<br \/>\nSilga spa has nevertheless decided to invest in this ambitious and innovative project and take the lead. The reasons repay the economic and, above all, technical effort: a final post-denitrogen treatment has been added to the classic anaerobic-aerobic sequence, molasses as a constant carbon source and a multitude of automatic controls for physical and chemical parameters (e.g. dissolved oxygen, nitrogen, TOC, pH, redox potential, chlorides&#8230;).<br \/>\nThe biological purifier allows us to almost totally break down nitrous and nitric nitrogen and considerably limit ammoniacal nitrogen, which are the basis of surfactants and other nitrogenous products essential for maintaining the high technical and aesthetic standards of galvanised products.<br \/>\nThis allows us to use them \u00ab\u00a0without care\u00a0\u00bb, and to maintain the wide range of finishes and solutions. That&rsquo;s not all: the quality of the wastewater treated downstream of the biological purifier is so high that it allows us to reuse much of it in the process, with considerable water savings, considering that the wastewater has an average daily flow rate of 60 mc\/h (maximum flow rate 120 mc\/h).<br \/>\nConsidering that the current percentage of recycling is 10%, the goal is to improve more and more this percentage.<\/p>\n<p><strong>Technical notes:<\/strong><br \/>\nEqualization tank: chemical-physical wastewater arrival<br \/>\nDenitro, oxidation and post-denitro tank: tot. 1500 mc<br \/>\nSettling tank: Tot 2000 mc[\/vc_column_text][vc_single_image image=\u00a0\u00bb3662&Prime; img_size=\u00a0\u00bbfull\u00a0\u00bb alignment=\u00a0\u00bbcenter\u00a0\u00bb onclick=\u00a0\u00bblink_image\u00a0\u00bb][vc_btn title=\u00a0\u00bbEnvironment and safety\u00a0\u00bb style=\u00a0\u00bbflat\u00a0\u00bb shape=\u00a0\u00bbsquare\u00a0\u00bb link=\u00a0\u00bburl:https%3A%2F%2Fsilgagalvanica.com%2Fen%2Fenvironment-and-safety%2F|title:Ambiente%20e%20sicurezza\u00a0\u00bb][\/vc_column][\/vc_row]<\/p>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_column_text] Silga, almost the first in Europe to invest in biological wastewater treatment The biological industrial waste water treatment plant was necessary for the removal of nitrogenous compounds. The existing chemical-physical purification plant was indispensable for removal of heavy metals and toxic substances (such as cyanides), but it was unable to bring us within the<\/p>\n","protected":false},"author":1,"featured_media":3663,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[116],"tags":[],"class_list":["post-3661","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-fr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Watchword: eco-sustainability - Silga Beyond Surfaces<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/silgagalvanica.com\/parola-dordine-ecosostenibilita\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Watchword: eco-sustainability - Silga Beyond Surfaces\" \/>\n<meta property=\"og:description\" content=\"[vc_row][vc_column][vc_column_text] Silga, almost the first in Europe to invest in biological wastewater treatment The biological industrial waste water treatment plant was necessary for the removal of nitrogenous compounds. 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