5 M3 industrial wastewater treatment project

Chapter 1 Overview

1.1 Project Overview
1.1.1 Project Name, Location
Project Name: Industrial Wastewater Treatment Project
Scale: 5m3/d

Chapter III Wastewater Treatment System Process

3.1 Analysis of wastewater properties and process route determination:
The sewage contains oil, binders, suspended solids, and the like.

1. The COD concentration is high and unstable, mainly caused by oil pollution;
2. It contains a large amount of suspended solids, mainly formed by production;

Sewage treatment process:

According to the characteristics of the wastewater and the requirements for the treatment of the effluent, the wastewater treatment process can be carried out by air flotation + filtration. In the characteristics of wastewater discharge, the properties of wastewater, the following processes are currently being developed.

3.2 Introduction to wastewater process:
The waste water is treated by an air flotation machine to dispose of the oil and suspended matter in the sewage, and then strongly adsorbed by the activated carbon filter and filters the refractory substances such as oil remaining in the water. Fully compliant emissions.

The sludge and oil generated by the air flotation machine enter the sludge pool for regular treatment. Customers can choose sludge drying or dewatering treatment of the stack filter.

Sludge drying is to dry the sludge in a site. The advantage is that the equipment is invested. The shortcoming is that the time is long and the site is large. The sludge can be directly transported away after being treated by dewatering. (Customer can choose)

3.3 Pollutant indicator removal measures and removal rate prediction:
The main pollutant removal measures in this program are as follows:
Removal of COD/BOD: The purpose of removing COD/BOD mainly by adsorption of air flotation device and filter.
Removal of SS: The purpose of removing SS is mainly achieved by an air flotation device and a filter.
Oil pollution: flotation of the air flotation machine and filtration and adsorption removal of the filter.
Other indicators: With the removal of COD and SS, oil pollution, the remaining indicators are also greatly reduced.

Chapter 4: Equipment Selection and Function
According to the characteristics of wastewater, in accordance with economic principles, it is determined to use a 5m3/d air-floating filter integrated machine. The air flotation filter integrated machine includes a dissolved air flotation machine and an activated carbon filter.

4.1 Air Floater:

The dissolved air flotation machine utilizes clean water or partially treated return water, and the air is sucked and mixed by the microbubble generator to form dissolved gas water, which is released under reduced pressure in the air floating tank, and the air dissolved in the water is formed by bubbles of 20-30 μm. Precipitation, with high surface area adsorption capacity, can be better removed for suspensions of different concentrations of sewage, part of the clean water after treatment (design index is 20-40%, usually 30%), air-floating circulation working pump The pressurized water-insoluble gas tank is mixed with air, and the air is dissolved in water, and the dissolved gas efficiency at this time reaches 80% or more. The air dissolved in the water is released from the water to form microbubbles having a particle diameter of 20-50 μm, and the microbubbles are combined with the suspended matter in the sewage, so that the specific gravity of the suspended matter in the sewage becomes small until it floats on the surface of the water body; The slag is then removed by a chain scraper installed on the air floatation tank to achieve the treatment effect.

JXW series dissolved air flotation machine is mainly used for solid-liquid or liquid-liquid separation. A large amount of fine bubbles are generated in the water by the dissolved gas and the release system, so that it adheres to the solid or liquid particles whose density is close to that of the water, causing the overall density to be lower than that of the water, and by buoyancy to rise to the surface of the water, thereby Achieve the purpose of solid-liquid or liquid-liquid helium.
The role of dissolved air flotation machine in the treatment of oily wastewater is very obvious. By adding 2-3 kinds of flocculants, the oil and the suspended matter in the sewage are flocculated, and under the action of dissolved air release, the water surface is installed on the upper part of the scraping residue. The machine scraped away, and the mine sewage became clear at this time, but it also contained some small SS and residual oil.

4.2 Activated carbon filter:

Filtration is one of the indispensable means in the sewage treatment process, especially the discharge of pollutants after sewage treatment, used to intercept impurities and fine SS in water, and to enhance water quality, save water resources or protect by adsorption of activated carbon. surroundings.

By using the adsorption adsorption and decolorization ability of the activated carbon itself in the feed water, different types of activated carbon are loaded to remove residual chlorine, organic matter, bacteria, color, odor, oil and the like in the water. In particular, loading activated carbon with different properties can achieve the corresponding treatment target. The water contains suspended matter condensed sheet, which is a kind of adhesive colloidal particles which cannot be removed by simple precipitation, air floatation, etc., and the activated carbon filter is used to separate and filter the water body. The effluent turbidity is generally below 5mg/I, which is in line with national first-class emission standards. It also has a good removal effect on suspended solids, solids, heavy metal ions, etc. in industrial wastewater.

This product has two kinds of filter material and activated carbon. The activated carbon filter is used in the deep treatment of water. It can remove the color, odor and micro particles in the water. As the filter material, the activated carbon should be selected according to the water demand. Granular activated carbon.

Features:

1) Compact structure and easy operation.
2) Cleaning is simple and does not incur additional costs.
3) The filtering area is large, the amount of dirt is high, and the adsorption is good.
4) The temperature of the water flowing through the medium is not limited.
5) The filter material has a long service life, strong maintainability, and easy installation and disassembly.
6) Small footprint and convenient transportation.