MicroWeb EPB Wastewater Treatment Packaged Equipment
User Manual

1. Introduction

MicroWeb EPB, based on conventional biochemical treatment, it applies our proprietary MicroWeb technology to strengthen the process and enhance the efficiency of the treatment.

MicroWeb EPB technology can be used in a wide range of wastewater treatment, such as the wastewater from restaurant, hotel, and clustered homes area etc. After the treatment, the rate of COD removal reaches a high level of 90%, and COD, BOD, SS, pH meet the discharge standard.

MicroWeb EPB has the advantages of high efficiency, easy operation, low operating and maintenance costs, less space occupation.

2. MicroWeb EPB model types

MicroWeb MWR model types are shown as below:

EPB-01

That is: EPB-Number

Where:
Number --- stands for the capacity per hour

Table 1 shows the model types of MicroWeb EPB. If the type you required is not listed in, contact us please.

Table 1. EFB model types
Model type Equipment Range Use case Estimated size (m2)
EPB-01 1. Oil interceptor
2. Buffer chamber
3. Mixer
4. Biochemical tank
5. Pulse device
10.2t/h Wastewater from restaurant, hotel, clustered homes, and beverage manufactory etc. 16
EPB-05 51t/h 26
EPB-15 153t/h 59
EPB-25 255t/h 73
EPB-50 5010t/h 183

3. The principle of MicroWeb EPB and the description of equipment

The flowchart of MicroWeb EPB is as follows. It consists of four or five parts: (1) Oil interceptor (used in treating the wastewater with high oil content) (2) Buffer chamber (3) Mixer (4) Biochemical tank (5) Pulse device.

3-1. Oil interceptor

Oil interceptor is necessary to treat the wastewater with high oil content, such as that come from restaurant, refinery etc. The sketch map is shown as figure 2.

Wastewater comes into the oil interceptor through A. As the wastewater flows to the effluent B, oil will separate from water and float up to the surface, and most of it stops at the area 1 and 2. The treated wastewater flows out through B. When the oil accumulated to the designed amount, take it out with a vacuum pulp.

3-2. Buffer chamber

The sketch of buffer chamber is as figure 3.

In the buffer chamber, the volume of wastewater is balanced and the quality is adjusted. Moreover, all those kinds of hard-degrading organic contaminants are broken up into small molecules; it benefits the following phase biologic process.

3-3. Mixer

The sketch of mixer is as figure 4.

The wastewater is mixed with air via mixer so that there are not needed to fix aerators in the bio-chemical tank. It reduces the consumption of power.

3-4. Biochemical tank

The sketch map of biochemical tank is as figure 5.

The biochemical tank consists of three areas. The first part is the area filled with moving fillers; the wastewater carrying with the air is distributed into the tank from the bottom. A net is fixed on the output channel to prevent the fillers move out. In the second area, the fixed fillers are loaded. The water, which comes from the first area, is distributed from the top, and after go through the fillers, the water and the sludge flow into the settling area. In there, the mixture of small flocs and water enters from the bottom and, as it raises, it will be filtered with the sludge blanket formed there before. As the flocs become large and heavy, they descend to the bottom of the area and are transferred back into the buffer chamber.

3-5. Pulse Device

The sketch map of pulse device is as figure 6.

After sludge is put into the pulse device, it will be discharged into the buffer chamber automatically as the designed time.

4. Bio-additive and chemicals

4-1.The addition and dosage of bio-additive

(1) Microcat

Microcat, which grows quickly and adapts outsider strongly, is used to start the biochemical system in MicroWeb EPB. After the microbe matures and the system goes smoothly, stop adding it, or to add it sometimes when it is necessary.
Microcat is a kind of solid powder. It can be add to the biochemical tank directly. The dosage is 2-5 gram per ton of wastewater.

4-2.The preparation and dosage of chemicals

(1) PolyWeb P30

In preparing P30 Standard Solution, disperse P30 solid powder in 2000 times its own weight of water. The P30 powder should be introduced gradually into clean water (15~45OC) and dispersed for approx. 0.5 ~ 1 hr. at a speed of between 20~80 RPM until a uniform dispersion is obtained. Normally the solution can be stored for 3 days. Two tanks for diluting are recommended, so that they can be alternatively operated.
The dosage of P30 should be 1.2~1.5ppm, that is, adding 2.4L~3L P30 solution (0.05%) into one ton wastewater.

5. MICROWEB EPB operations

The flowchart of MicroWeb EPB-XX is shown as figure 7.

(1) Process of oil interceptor

The high oil content wastewater is designed to stay in oil interceptor for about 40 minutes. When the thickness of oil reach the height of 10~20cm, pump out the oil with a pump.

(2) The process of buffer chamber

The wastewater stays in buffer chamber for two hours. With the volume balanced, the quality adjusted, and the organic degraded, the clear water on the upper layer flow over the cover and then are pumped into the mixer.

(3) The process of biochemical tank

The wastewater is mixed with air in mixer. The water carrying with the air enters the biochemical tank from the bottom. P30 is added in the first area of the tank. Reacting time allocated to the three areas of biochemical tank is even and one hour each. The sludge that settled down on the floor of area two and three are discharged to the pulse device. The clean water that from area three is discharged to outside.

6. MicroWeb EPB maintenance

1. The main joints and valves of EPB should be checked and cleaned periodically to prevent block up. When not in operation, these parts need to be cleaned up and get ready for the reuse.

2. Check the distributor located in biochemical tank regularly, in case of any block.

3. EPB should be installed inside to ensure the bio-bacterial effectively during the winter.

4. Pumps should not run without water.

7. MicroWeb EPB safety of operating

1. Make sure not touch the dangerous part when turn on or turn off the electricity power.

2. Always wear gloves when handling of bio-additive and P30. Wash with plenty of clean water and soap following any contact with these products.

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Updated October 18, 2002