Feature:

1,Fully considering secondary pollution, equipment require low noise, no obvious peculiar smell, treatment facility should have seal measure, reduce the influence to surroundings; 

2,Simple system operation, convenient to maintenance and management;

3,Treatment system can automatic operate, low operate cost , save investment;

4,Few sludge yield, and guarantee sludge has reliable outlet

5,Treatment measure has bigger adaptability,emergency ,which can meet up water quality and volume variety;

Process Description

1,Manual Bar screen 1 pc

Main used to intercept big block floater in sewage, to guarantee follow-up processing structures normal operation and effective reduce load, supply guarantee for system long term normal operation, bar screen space is 5mm, size:500*300mm

2, Equalize tank

Due to each time water quality,volume is different, the peak flow rate of average flow rate 2~8 times, thus sewage treatment system steady operation, equalize water volume and homogenize water quality, build-in sewage pump and backflow measure, equip with aeration system to proceed pre-aeration, to guarantee certain rated flow rate lifting to integrated sewage treatment equipments and follow-up treatment steady, sewage lifting pump 2pcs .

3. Package sewage treatment plants

This technical process adopt integrated sewage treatment plants, such plants mainly aiming at domestic sewage and industrial organic sewage, mainly adopt the mature bio-chemical treatment contact oxidation manner, total composed of the following 6 parts:

(1)Anoxic tank

  In order to control the dissolved oxygen in A grade biochemical tank about 0.5mg/l, adopting interval aeration. The padding in A grade biochemical tank adopting new type elastic padding, height is 2.0m. such padding with the advantage of no easy blocking,light weight,big specific surface area, treatment effect steady etc, easy to maintenance and change , retention time >3.5hours.

(2)oxic tank

The O grade biochemical tank equip with columnar biology carrier padding, this padding specific surface area is big, is 16-20 times comparing with common biological padding, keep higher biomass, to reach the purpose of removing organic pollutant, aeration device adopting air blower and micropore aerator, the oxygen utilization rate is above 30, effective save operation cost. Retention time >7 hours, air water ratio about 12:1.

 (3)Settling tank

The sewage still contain large number of suspended solid after treated by O grade biochemical, in order to make the effluent water SS meet up discharge standard, adopting vertical settling tank to make solid liquid separation, 1 set , surface load 1.0m3/m2·hr. the settling tank sludge adopt air lifting device lift to sludge tank, at the same time, according to actual condition to make part of sludge lifting to A grade biochemical tank to proceed sludge backflow, increase the sludge concentration in O grade, improve removal efficiency.

(4)cleaning water tank

Used to storage cleaning water after treatment.

(5)Sludge tank

The supernate backflow to O grade biochemical tank to further treatment, few sludge after digestion. clearing manner can sucking and transport out from sludge tank bottom using dung-cart.

(6)Air blower room

Air blower set in the air blower room, equip with silencer.

STEP ONE - The first step for the raw sewage when it reaches the Wastewater Treatment Plant is the removal of heavy particles from the liquid. This happens in the Grit and Screen Building. Here, the sewage passes through a screen system to remove any material greater that 12.5 mm in size.    This material is removed and transported to the landfill.  The wastewater then passes through a centrifical grit removal system. 

STEP TWO - The wastewater then travels to the Primary Sedimentation Basins where its speed is reduced even further. This allows fine particles to settle. The settling process divides the materials into settled material at the bottom of the basins, called sludge, and wastewater.

The sludge is moved to hoppers at the ends of the tanks by scrapers and is sent to the Fermenters (large, closed tanks with mixing mechanisms). Here, Volatile Fatty Acids (VFAs) are created through fermentation (a chemical process that breaks down organic matter). These VFAs are then used in the next stage of treatment.  Small amounts of fermenter sludge is periodically wasted to the Digesters to ensure the continued success of the fermentation process.

As the wastewater leaves these basins, any floating grease or scum is skimmed from its surface and sent to the Digesters. The wastewater, now called primary effluent, is pumped to the Bioreactors.

STEP THREE - The bioreactors are a state-of-the-art Biological Nutrient Removal (BNR) facility. The wastewater is treated by using micro-organisms instead of traditional chemical methods to break down the unsettled particles and nutrients. The micro-organisms do this by using the nutrients in the wastewater as a food source. VFAs created by the fermenters are used in this process by some of the micro-organisms. The process of BNR is environmentally friendly and helps ensure a cleaner, more natural final product.

STEP FOUR - After nine hours in the Bioreactors, the effluent flows by gravity to the Secondary Clarifiers. Here the micro-organisms in the wastewater settle to the bottom and are returned to the Bioreactors.

STEP FIVE - The clear effluent from the Secondary Clarifiers flows through the UV Disinfection system. Finally the treated effluent flows over a weir and into the South Saskatchewan River.

STEP SIX - The sludge and/or scum removed from the Primary Sedimentation Basins, Fermenters and Secondary Clarifiers will remain in the Digester at 35 degrees Celsius for approximately 20 days. Because there is no oxygen present in the Digesters, it is an anaerobic process and the bacteria begin to produce methane as they break down the sludge. The methane is used as a fuel for the boilers in the Heating Building that heat the Wastewater Treatment Plant.

STEP SEVEN - Stabilized sludge, the end product from the digestion process, is pumped 12 kilometres north of the Plant and is stored in deep ponds. Twice a year the sludge is pumped out and spread on farmers' fields by a process called liquid injection. The sludge is an excellent soil conditioner adding nutrients and moisture.

Highly trained Plant operators in the control room closely monitor all aspects of the Wastewater Treatment Plant, twenty-four hours a day, seven days a week. The on-site laboratory continuously tests the processes to ensure that the water going back into the river meets or exceeds environmental criteria.