Tenders Are Invited For Construction Of Home Sewage Treatment Plants In The Promna Commune in Poland

Work Detail

1. The Subject Of The Contract Are Construction Works As Part Of The Task Entitled Construction Of Home Sewage Treatment Plants In The Promna Commune. The Scope Of Works Constituting The Subject Of The Contract Includes The Construction Of 100 Home Sewage Treatment Plants In Towns In The Promna Commune. Number Of Home Sewage Treatment Plants: 1-6 Rlm In An Amount Of 89, 7-8 Rlm In The Amount Of 11 Pcs. 3. Construction Of A Sewage Treatment Plant: The System Is Characterized By A Compact Construction And Consists Of: 1) A Tank Made Of Grp Material, In The Middle Of Which There Are Three Separated Purification Zones: • Preliminary Settler, • Biological Zone, • Secondary Settler. 2) Control, Used To Set Up Work And Signaling Possible Failures. 4. The Principle Of Operation: Biological And Mechanical Sewage Treatment Plant 1, 5, 6 And 8 Rlm Is Based On Rotational Biological Deposits. The Monolithic Tank Made Of Grp Material Contains Three Purification Zones In Which Domestic And Economic Wastewater Treatment Processes Occur. Raw Sewage Entering The Sewage Treatment Plant Tank Is Subjected To Mechanical Cleaning In The First Pre-Chamber. In This Zone, Mineral And Organic Solid Particles, And Fats, Which Should Be Periodically Exported By The Senazation Rolling Stock Are Mainly Retained. In The Next Phase, The Sewage Is Served By The System Of Mounted Bodies To The Biological-Oxygen Chamber, Where The Rotating Shaft Is Planted A Biological Deposit That Covers Biologically Active Membrane. Thanks To The Dairy, Sewage Flow Is Constant, Which Allows The Sewage Treatment To Be Immunized To Uneven Daily Tributaries. Thanks To The Rotational Movement, The Surface Of The Deposit Is Cyclically Immersed In Sewage, And Emerges With Contact With Air. Thanks To This Construction, The Biofilm Formed On Deposits Has Constant Access To Organic Compounds Compact In Sewage, And Oxygen From The Air, Which Is Why The Sewage Treatment Plant Is Full Nitrification. After This Zone, The Sewage Flows To The Last Chamber Of The Secondary Settlement Purification Chamber. The Role Of This Section Is The Final Sewage Clarification After Mechanical-Biological Processing And Partial Denitrification. From The Secondary Settler, The Sewage Gravitational Flows To The Receiver. 5. Disadging System: The Development Of Cleaned Sewage Will Take Place Through The Plot In The Ground. With Regard To Existing Soil And Water Conditions On The Plot, The Following Should Be Performed: At The Place Of The Launch Of Drainage Pipes, A Trench Should Be Performed - See Pzt, In Native Soil With A Depth Of 0.8 - 1.3 Depending On The Inheritances Obtained. The Minimum Distance Between The Draining Strings Is 0.5 M. In Such Prepared Ditches, The Filter Layer Of Rinsed Gravel With Granulation From 16 - 32 Mm, Whose Layer Should Have 0.36 M, Is In Such A Way That After Pouring The Above -Mentioned Material, The Slope Of The Substrate Intended For Laying The Pvc Pipes Should Be A Minimum Of 0.5 %. Pvc Pipes

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