Which of the Lianggong valves are used for wastewater and sewage treatment? With the continuous aggravation of water pollution in China, the sewage treatment and recycling industry has been attached great importance. In the sewage treatment pipeline system, valves play a very important role. Sewage treatment is widely used in construction, agriculture, transportation, energy, petrochemical, environmental protection, urban landscape, medical treatment, catering and other fields, and more and more people are entering the daily life.

現代污水處理技術按處理程度可分為一級處理、二級處理和三級處理。一般來說，污水處理的程度是根據水質和被處理水的去向來確定的。在良工閥門中每個級別使用的閥門也不同。主要去除污水中的懸浮固體污染物，大部分物理處理方法只能完成初級處理的要求。污水經一級處理后，BOD一般可去除30%左右，達不到排放標準。一級處理屬于二級處理的預處理。所用閥門及其管道附件：刀閘閥、三偏心蝶閥、過濾器等

Modern sewage treatment technology can be divided into primary treatment, secondary treatment and tertiary treatment according to the treatment degree. Generally speaking, the degree of sewage treatment is determined according to the water quality and the destination of the treated water. The valves used in each level of Lianggong valves are also different. It mainly removes suspended solid pollutants in sewage, and most physical treatment methods can only meet the requirements of primary treatment. After primary treatment, BOD can generally be removed by about 30%, which can not meet the discharge standard. The primary treatment belongs to the pretreatment of the secondary treatment. Valves and pipe accessories used: knife gate valve, three eccentric butterfly valve, filter, etc

主要去除污水中的膠體和溶解性有機污染物（BOD、COD物質），去除率可達90%以上，使有機污染物達到排放標準，懸浮物去除率可達95%，出水效果好。在良工閥門中所用閥門有軟密封蝶閥、閘閥、球閥、止回閥等進一步處理難降解有機物、氮磷等可導致水體富營養化的可溶性無機物。主要方法有生物反硝化除磷、混凝沉淀、砂濾、活性炭吸附、離子交換和電滲析。使用的閥門有對夾蝶閥、閘閥、球閥、止回閥、橡膠軟接頭等。

It mainly removes colloid and dissolved organic pollutants (BOD and COD substances) in the sewage, with a removal rate of more than 90%, so that the organic pollutants can meet the discharge standard, and the removal rate of suspended solids can reach 95%. The effluent effect is good. The valves used in Lianggong valve include soft sealing butterfly valve, gate valve, ball valve, check valve, etc. to further treat the refractory organic matter, nitrogen and phosphorus and other soluble inorganic matter that can lead to eutrophication of water body. The main methods are biological denitrification phosphorus removal, coagulation sedimentation, sand filtration, activated carbon adsorption, ion exchange and electrodialysis. The valves used include wafer butterfly valve, gate valve, ball valve, check valve, rubber soft joint, etc.

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