Small Package Sewage Treatment Plants

The WPL range of package sewage treatment plants is specifically designed for properties not connected to mains drainage.

Brief  Introduction:The WPL range of package sewage treatment plants is specifically designed for properties not connected to mains drainage.Our unique sewage treatment system includes innovative features that you will not find elsewhere, making them the first choice for thousands of customers around the world. Our commitment to the highest quality products, supported by our friendly, knowledgeable after sales service adds up to the best wastewater treatment solution on the market.In domestic applications the Diamond comes in a range of sizes and can provide treatment for domestic population equivalents of up to 55 persons, meeting consent standards of 20mg/l Biological Oxygen Demand, 30mg/l Suspended Solids and 20mg/l Ammoniacal Nitrogen.Typical domestic uses:Single housesSmall groups of houses, with maximum population equivalent of 55 personsTo replace existing septic tanksTypical commercial uses include:•Offices •Factories •Bed and breakfasts •Farm shops •Other rural businesses

Operation Principle: (Refer to attached picture)

A. The wastewater flows into the main tank and enters directly into the bio chamber (B) through this inlet pipe (A).B. This is where the biological process begins. the bio chamber (B) is an aerated zone where the solids circulate and are thereby biologically treated. Part of the solids settle in to area (C) only to be re circulated via the draft tube (D) and re treated.C. In this area, the settled solids from the bio chamber (B) and the clarifier (E) are drawn up through the draft tube again and released into the bio chamber for re treatment.D. The draft tube enables the solids to be drawn back up into central aeration chamber and re circulated through the treatment process.E. This is the clarifier. There is no aeration in this area. The fluid flows upwards through the clarifier as it is being displaced when more wastewater enters the tank. The remaining solids settle out again into area (C) and are re circulated via the draft tube (D) into the bio chamber(B).F. The clarified liquid then percolates through the holes in the bottom of scum board assembly and flows over the weir.G. The clarified fluid flows out over the weir, into the outlet pipe and is then discharged.

Parameter :

Model :                                            DMS2     DMS3      DMS4        DMS5        DMS6         DMS7         DMS8        DMS9

Population range(persons):       1 to 6      5 to 11    10 to 15    14 to 20     21 to 27     28 to 35      36 to 45     46 to 55

Maximum organic loading

BOD/day(Grams)                 :         360         660           900           1200         1620           2100           2700          3300

Blower Motor Sz (KW)*

Single phase rating             :         0.105      0.112       0.149        0.216        0.55            0.75            0.75            0.75

* Actual power consumption may vary (dependent on motor efficiency and nature of installation), size stated is the motor size NOT actual power consumption**For DMC7, DMC8 AND DMC9 models using 3 Phase electrics, blower motor is rated at 0.9 kwProcess performance is subject to strict adherence to WPL’s Installation Manual, User Guide/Operation & Maintenance Manual, and a start up period of 6 to 12 weeks depending on plant loadings and water temperature.The treats wastewater to a 95th percentile standard of:•20mg/l Biological Oxygen Demand (BOD)•30mg/l Suspended Solids (SS)•20mg/l Ammoniacal Nitrogen (AMM N)

Small Package Sewage Treatment Plants