The environmental commitment is a guiding principle in the operation of TPP AES Galabovo. After becoming operational in 2011, it works entirely with local lignite from Maritza Iztok Mines. The production process ensures optimal management of all environmental components in full compliance with all European environmental legislation and best practices including Directive 2001/80/EC on the limitation of emissions of certain pollutants into the air from large combustion plants and is ready to meet the more stringent requirements of Directive 2010/75/EU on industrial emissions (integrated pollution prevention and control). TPP AES Galabovo was designed and operates in compliance with emission standards for sulfur dioxide (SO2) not exceeding 400 mg/Nm3 and desulfurization efficiency rate over 95%, nitrogen oxides (NOx) not exceeding 200 mg/Nm3 and dust less than to 30mg/Nm3.
Continuous Emission Monitoring System (CEMS)
CEM system for monitoring of SO2, NOx, CO, dust, and process parameters is installed. Monthly and annual reports are submitted to the Regional Inspectorate of Environment and Water -Stara Zagora. The annual IPPC Permit Reports are publically available on the internet page of the Environment Executive Agency. See here.
Flue Gas Desulphurization (FGD) System
The FGD system installed in the plant is utilizing the wet limestone technology for the desulphurization. According to the technical process no possibility for bypass of Flue Gas Desulphurization system exists. The flue gas is discharged into the atmosphere only through the FGD system. Thus, if or when the desulphurization process fails, the production of electricity also interrupts automatically. This measure guarantees operation of the plant only with working FGDs, achieving 98% efficiency rate and ensures protection of the air from pollution with sulphur dioxide.
Automatic Measuring Station
AES constructed an automatic measuring station in Galabovo. In the beginning of August 2008 the station was put into operation and transmits data in real time to the Regional Inspectorate of Environment and Water - Stara Zagora and to the Executive Environment Agency - Sofia. The station monitors ambient air quality in the region by the levels of the main four air pollutants – sulfur dioxide, nitrogen dioxide, PM10 and PM2.5.
In addition to that, for becoming more transparant, AES installed information board at the entrance of the plant that displays again in real time the current load and FGD efficiency rate.
Early Warning System
The Early Warning System for ambient air pollution in the region, in case of unfavourable atmospheric conditions is a prognosis tool for the levels of SO2, NOx and dust in the ambient air 48 hours ahead. This program software for air quality modelling was developed and commissioned in the period 2007-2012 as a joint project of all power plants in the region, environmental authorities and in partnership with scientists from the National Institute for Meteorology and Hydrology (NIMH). Based on the prognosis the thermal power plants are able to undertake measures for reducing the load, and respectively their emissions. Thus, the exceedance of the emissions limit values is avoided.
Various systems and facilities are installed in TPP AES Galabovo to ensure closed working water cycle. Waste water from all streams is treated and reused, which reduces the total quantity of production water. We operate with zero waste water discharge. The modern water treatment technology with Reverse Osmosis enables efficient and safe operation with minimal chemical use and maximum cycles of concentration while no harmful chemicals are discharged to the environment.
The wastes generated by the operation of TPP AES Galabovo are collected, stored and treated, in compliance with European and Bulgarian regulations and permits.
The waste, formed in result of the combustion and desulphurization processes are bottom ash (slag), fly ash and gypsum. They are temporary stored in closed silos, equipped with dedusting systems. The wastes are disposed at a specially-constructed waste disposal facility, 7 km away from the plant, where they are transported through a tube belt conveyor and by trucks.