倍加福水+污水处理方案

In addition to specific process areas of a waste water treatment facility where a wide range of intrinsically safe solutions are required, the water filtration equipment and the entire waste water treatment plant itself must be monitored to protect against corrosive, dusty, dirty, and explosive atmospheres, in addition to lightning protection and purge suppression. Pepperl+Fuchs has a wide range of protection methods that will keep the waste water treatment plant safe and operating effectively.

Lightning and surge protection
Sewage treatment plants are especially exposed to the risks of atmospherical discharges and lightning strike. In addition, lightning strike, static electricity and power surges can spread very easily due to the great expanses of networks and multiple grounds that exist in the sewage treatment plant.

There are two phenomena that can occur in the typical industrial sewage treatment plant that are induced by lightning, large electrical equipment, and welding equipment: lightning strike and power surges.

A lightning protection system consists of external protection, and internal lightning protection. External lightning protection minimizes fire risk by lightning strike and the realization of the Lightning Protection Zones Concept helps to optimize the availability of the installation to a maximum level. 

A part of the lightning current flows directly to grounding via the earth-termination system.  The other part flows via the external supply lines of the sewage treatment plant and could damage the installation. These external supply lines must be furnished with lightning current capable surge protective devices (SPDs). Surge arresters reliably protect the terminal equipment in the waste water treatment facility against conducted transient voltage.

Instrumentation in designated areas of the water treatment plant is susceptible to lightning strike or surge. To protect this equipment, water treatment plants install advanced controls using a DCS or PLC system. Damage to the water treatment equipment may result in draining polluted water into the local watersheds, rivers or lakes.  Pepperl+Fuchs offers signal conditioning applications that provide isolation and prevent ground loops, thus protecting the water treatment plant.

Intrinsic safety
Intrinsic safety is used where explosive gases like methane CH4 can collect. Our H-System and K-System isolators together with our RPI Remote I/O System provide the solution. The digestion area of a waste water treatment facility is where microscopic bacteria digest the sludge and break it down into methane gas. These digesters produce so much methane and carbon dioxide CO2, that it can actually be used to provide heat to the digester tank and operate electric generators or motor vehicles. 

Purge
Raw sewage, corrosive chemicals, and sludge in a waste water treatment facility can damage industrial instrumentation and equipment. Pepperl+Fuchs offers Enviro-Line pressurization systems (10E-WGS Series). This will purge panels, cabinets, and other equipment from corrosive, dusty, dirty, atmospheres.

Monitoring of oil, petrol, and gasoline separators

Monitoring of oil, petrol, and gasoline separators

Using oil separators and oil water separators to protect groundwater sources from oil, gasoline and petrol pollution is crucial. Water, especially groundwater sources used for drinking water and other human use, is a valuable resource that must be protected from pollution. Car repair shops, airport runways and industrial applications can produce oily water runoff that has the potential to cause groundwater contamination.
 
Oil separators and oil water separators prevent the discharge of these hazardous substances into the environment, thus preventing groundwater contamination.
 
Oil separators and oil water separators must comply with the requirements specified by the European Standard EN 858-1:2002. However, the installation of an oil separator alone does not fully protect groundwater sources. In order to ensure the reliable functioning of the oil water separation system, the installation has to be checked regularly and routinely monitored and verified. Without these safety and maintenance checks, environmental damage and the resulting risk of liability cannot be prevented.
 
Close monitoring of oil separators and oil water separators is provided with an electronic alarm system, featuring an early-warning mechanism that is able to recognize critical operating conditions of the separator early enough to prevent any discharge of pollutants into the environment.
 
In areas where no persons are present and where supply voltages are available, an alarm release system, operated via a GSM mobile network, can offer 24/7 protection.
 
The requirements for electronic alarm systems for oil separators are also specified in the European Standard EN 858-1:2002. It includes specific requirements involving an “installation that releases an alarm when excessively high light liquid or high/low sewage levels” are detected.