Facing water and sewage (waste) water treatment

Water and sewage treatment are closely related to the people's production and life. Therefore, it is required that the supplier of electrical instrument control system solutions has rich industry application experience. By virtue of its many years of application experience in the water industry, we have provided instrumentation and control equipment for our company. Computer and PLC/DCS), electric transmission equipment (converters and soft starters), system network communication equipment, and a solution package for water purification and wastewater treatment.

For large-scale distributed equipment, provide mature SCADA system solutions. Such as pumping houses, water pipelines, pressurized pumping stations, the use of reliable wireless data transmission or wired telecommunications network, to achieve all systems all equipment telemetry, remote control. This SCADA system can be independently applied to the emission detection of major pollution sources in the city, or the monitoring and scheduling of water source wells.

The task of the typical water supply process water treatment is to process the raw water so that the water quality meets the various requirements of living or industrial water. The common process of tap water is mainly divided into the following steps:

Raw water transport: The process of transporting water from rivers, lakes, or reservoirs to water treatment plants usually consists of several pump stations.

Coagulation and agitation: In the reaction tank, add chemicals (coagulants, coagulant aids) to mix and stir, so that the colloidal particles in the water are destabilized and flocculate with other particles.

Precipitate: Precipitate in the sedimentation tank to remove most of the suspended particulates and floes in the water.

Filtration: Filter through the filter to further remove suspended matter and floes. Backwash restores filtration capabilities of the filter layer. The filter tank has different sand filtration, coal filtration and carbon filtration processes depending on the filter media.

Disinfection: Add chlorine at the inlet, replenish chlorine at the outlet as needed, and mix and contact to kill pathogenic microorganisms in the residual water.

Other methods of disinfection are: ultraviolet light, chlorine dioxide and ozone.

Advanced treatment: In order to further improve the quality of effluent, the ozone and activated carbon filtration and disinfection methods are usually used to achieve the direct drinking water discharge indicator.

Storage: Clear water tank storage, adjust the water flow through the regulating valve.

Water delivery: Refers to the process of sending the processed water to the pipe network after being pressurized. It is usually composed of a pump booster pump station.
Common equipment in waterworks

Reaction tanks, clarification tanks, filter tanks, clear water tanks, chlorinators, blowers, dosing equipment, valves, pumps, mixing equipment, metering equipment, etc.

The commonly used monitoring data of the water plant include water temperature, turbidity (NTU), PH, COD, TOC, flow, pressure, and liquid.
control function:
a) Wired or wireless communication with the water company dispatch center
b) Plant level management information system management (Ethernet solution)
c) Lift pump station remote control station
d) Chloride dosing system distributed control station
e) Filter Control and Backwash System Distributed Control Station
f) Real-time detection of temperature, pressure, and water quality meters, dynamic display
g) Historical data collection, accident records, trend display
h) Automatic generation of running reports, real-time, scheduled printing

Typical sewage treatment process Urban sewage treatment is the use of various facilities and equipment and technology to separate and remove the pollutants contained in the sewage from the water, transform harmful substances into harmless substances and useful substances, and purify the water. And make full use of resources.

The sewage treatment process of a typical urban sewage treatment plant is mainly divided into:
Pretreatment process:
Including grid removal processing, pumping pumping and grit treatment.
• The purpose of the grid removal process is to retain large blocks of material to protect the normal operation of subsequent pumps, pipelines, and equipment.
• The purpose of the pumping pump is to increase the water head to ensure that the sewage can flow by gravity through the subsequent treatment buildings on the ground.
• The purpose of grit treatment is to remove sand, rocks, and large particles in the sewage, so as to reduce their settlement in the subsequent structures, prevent siltation of the facilities, affect efficiency, cause wear and blockage, and affect the normal operation of pipeline equipment.

First-level treatment process:
It is mainly the primary sedimentation tank. The purpose is to remove the suspended matter in the sewage as much as possible. A sedimentation tank can remove about 50 c/o of suspended matter and about 25 c/o of BOD5.

Secondary treatment process:
It is mainly composed of an aeration tank (biochemical pool) and a secondary sedimentation tank. The main purpose is to convert most of the wastewater into CO2 and H2O through microbial metabolism.

Reuse deep processing (reusing water):

In order to meet the high standards of receiving water requirements or for further processing for special applications such as industrial use, general-purpose processes include coagulation sedimentation and filtration. Deep processing ends often have chlorination requirements and contact pools. The advanced treatment can effectively solve the problem of water conservation and is reused after wastewater treatment. It is the future development trend.
Sludge treatment and sludge treatment equipment:

Mainly include sludge concentration (mechanical concentration and gravity concentration), digestion (anaerobic intermediate temperature), dewatering, and landfilling after composting for agriculture. (For sludge with heavy metals exceeding the standard, it should be disposed of carefully after dehydration, and generally it needs to be landfilled) .

Biogas utilization:

The biogas produced during the digestion process of the sludge must be purified, mainly desulfurization, dehumidification and filtration. Then store it properly. At present, the main utilization way of biogas is still to be comprehensively utilized in the treatment plant, mainly including biogas power generation, driving blowers or pumps, and directly using biogas boilers for sludge heating.