Resource Efficiency: The Company has been implementing technically and financially feasible and cost-effective measures for improving efficiency in its consumption of energy, water, raw materials, and other material inputs. Company monitors and reports its resource efficiency programs in its annual sustainability report. AILs energy sources include coal, diesel, natural gas, grid electricity, and purchased steam. At Jhagadia, a coal-based cogeneration (electricity and process steam) plant (CPP) of 8MW installed capacity has been operational and going forward (such as the new 4.5 MW CPP proposed at MPP Jhagadia), Company will install dual-fuel (coal or biomass) or natural gas-based boilers to reduce coal consumption in its energy basket. In addition to these, Plants also use energy generated from waste heat and process systems. In FY 21-22, the total energy consumed was 6.963 million giga joules (GJ) out of which coal alone contributed 84% to energy needs. The energy intensity has been showing a decreasing trend since last 3 years from 10.10 million GJ/ton of product in FY19-20 to 8.68 Million GJ/ton of product in FY21-22.
Water Consumption: AIL operations require water for wide variety of uses such as: chemical processing, heating, and cooling requirements, vacuum generation, steam production, solvent preparation, reaction media, product rinsing, distillation and washing. AIL sites in Jhagadia and Dahej source water from industrial water supply pipeline provided by Gujarat Industrial Development Corporation (GIDC). The water consumption is monitored through flow meters installed at main inlet and multiple areas within a Plant to get process-wise authentic water consumption data and plan & implement water conservation measures based on water auditing. Flow meter readings indicate that Jhagadia sites (Units 1 and 2) cumulatively consumes about 2600 cubic meters while Dahej Neo Division alone consumed about 300 cubic meters in the manufacturing operations, utilities, and domestic purposes. At the Corporate level, Company reports that its operations consumed about 2.3 million cubic meters in FY21-22 and recycled 1.03 million cubic meters of water (44% of total water consumption). AIL has established rooftop rainwater harvesting systems across all manufacturing units and has harvested about 6010 cubic meters of rainwater in FY2022. Water collected through the harvesting system is stored in a raw tank and is used in cooling towers.
To conserve water and increase water recycling opportunities, AIL has installed Zero liquid discharge (ZLD) based effluent treatment plant (ETP) systems in 10 out of its 16 Plants including at Jhagadia and Dahej. Installation of ZLD systems and 60-70% steam condensate recycling in boilers has caused reduction in freshwater consumption and increase in use of recycled water. Company uses advanced tertiary treatment technologies like RO Systems, Multiple effect evaporator (MEE), Agitated Thin Film Dryer (ATFD) and Sewage Treatment Plans (STP). Company monitors the specific water consumption which is around 2.68 cubic meters of water per ton of product.
GHG Emissions: AIL monitors and reports GHG emissions (Scope 1 and 2) as part of annual sustainability report. In FY21-22, the GHG emissions (Scope 1 and 2) reported is 0.704 million tCO2e in which coal contributed almost 80% of the emissions while purchased electricity (13%), process emissions (5%) and purchased steam (2%) are the other major contributors to GHG emission in company operations. GHG emission intensity has come down from 1.00 tCO2e/MT of product manufactured in 2019-2020 to 0.90 tCO2e/MT of product manufactured in 2020-2021 and further down to 0.88 tCO2e/MT of product manufactured in 2021-2022
The Company has signed up with SBTi (https://sciencebasedtargets.org/) in January 2023 for adhering to emissions reduction aligned with science-based targets, which are being developed and finalized. The key actions proposed include the following: partial coal replacement with biomass; increase the share of renewable power in energy mix; increase waste heat utilization and implementation of energy efficiency programs. This plan is expected to reduce total annual GHG emission (Scope 1 & 2) by approximately 0.74 million tCO2e (~16%) by FY27.
Pollution Prevention – Air and Noise: The sources of air emission from AIL operations include: (i) point sources of emission from the stacks attached to air pollution control devices for process reactors and vents attached to the process equipment, coal fired power plant and thermic fluid heater; (ii) fugitive emission from material storage and handling areas (coal, ash, powder charging, ATFD salt dispensing) and (iii) non-point source emissions from fugitive sources (pumps, valves, flanges) and non-routine activities (startup, maintenance, inspection).
For managing point source air emissions, the company has provided appropriate air pollution control devices, along with adequate height of stacks as per the permit conditions. Process scrubbers (acidic or alkali scrubbers, cyclone separators & wet scrubbers, falling film absorber, single stage 10% NaOH scrubbers) are installed to treat emission released from manufacturing processes. Company is in the process of replacing wet to dry scrubbers to eradicate the corrosion problems based on an evaluation and verification of process vent scrubbers for gaseous emission. Three stage, electrostatic precipitator (ESP) is attached as an air pollution control mechanism (APCM) to control particulate matter (PM) emissions from coal fired utilities (boilers and thermic fluid heaters). In the coal, lime is added to reduce SO2 emissions. For managing fugitive dust of coal and fly ash, storage areas is managed through fire water sprinklers. Above & Under Ground Storage Tanks are provided with PESO approved Tank-farms with nitrogen blanketing for controlling fugitive VOC emissions. Green belt has been developed to control fugitive emissions within plant premises.
For managing non-point source emissions, Company has formulated a Leak Detection and Repair (LDAR) Program as per local regulations applicable for the Petroleum Oil industry. As part of IFC investment and as per agreed ESAP#6, the Company will augment the EHS asset integrity management procedures by operationalizing the Leak Detection and Repair (LDAR) program in the Project. The LDAR program will be conducted across the whole of Jhagadia and Dahej plants including in all process units, utilities, storage tanks, ETP, WTPs, and loading/unloading area to control fugitive emissions to the atmosphere.
AIL has developed site specific environmental monitoring plan to monitor identified point sources of emission and workplace environmental quality in line with permit conditions. Air emissions monitoring program comprises of three systems: 1) Permanent ambient air monitoring stations installed to monitor ambient air (weekly twice) inside each facility to monitor ambient air quality twice a week as per national guidelines issued by CPCB in 2009; 2) Online Boiler and Process stack Continuous emission and effluent monitoring systems (OCEMS) has been installed and connected to Central Pollution Control Board (CPCB) portal as per regulator guidelines; and 3) engage external NABL accredited third party labs for monitoring boiler and process stack emission levels as per permit conditions. Ambient air quality monitoring is being conducted for 14 parameters including 12 parameters as per NAAQS, along with additional parameters of chlorine (Cl2) and volatile organic compound. Review of sample monitoring results indicate compliance to national legal requirements stipulated in environmental permits. Among the pollutants specified in Table 1 - Air Emissions in WBG EHS Guidelines for Large Volume Petroleum based Organic Chemicals Manufacturing, dated April 2007, Nitrogen oxide (NOx), Hydrochloric acid (HCl), Sulphur oxide (SOx), Benzene, Ammonia (NH3) and particulate matter (PM) were found applicable to Company operations at Jhagadia and Dahej. Review of air emission monitoring results with regards to above specified pollutants indicate compliance to WBG EHS Guideline values except for Ammonia in one of the plant stacks which was commissioned recently in 2023. As part of agreed ESAP#7, the Company will implement technical process improvements to comply with Ammonia WBG EHS air emission guideline levels and report the compliance annually to IFC through the annual monitoring report.
The sources of noise generation at AIL Jhagadia and Dahej sites include operation of equipment and machineries, such as blowers, pumps, motors etc from manufacturing operation and utilities. A noise pollution monitoring program comprising of fence line ambient noise, equipment operational noise and workplace noise monitoring is in place. The ambient noise levels comply with National Standards for industrial land use.
Pollution Prevention – Wastewater: AIL requires water in various chemical processes resulting in significant wastewater generation. The sources of wastewater from AIL operation consist of domestic wastewater, process wastewater, reject wastewater from scrubber, cooling tower, demineralization plant, and boiler blowdown. Domestic wastewater is treated in on-site sewage treatment plant (STP) and treated wastewater is utilized for gardening purpose.
AIL has installed ETP and MEE systems as part of ZLD at Jhagadia and Dahej sites. The ETP systems use advanced treatment methodologies like Fenton reaction for degradation of organic pollutants in effluent and uses ozonation system to treat recalcitrant chemical oxygen demand (COD) and enhance the biodegradability of the effluent. At Jhagadia and Dahej sites, AIL has also obtained membership of GIDCs Common Effluent Treatment Plant (CETP) for further treatment and deep-sea discharge infrastructure operated by M/s Narmada Clean Tech for discharge of 827 cubic meters treated wastewater. The GIDC CETP and marine outfall system is approved, regulated, and monitored by Gujarat State Pollution Control Board. However, AIL attempts to recycle most of its treated wastewater from its advanced tertiary treatment systems and discharges only the excess treated wastewater to CETP and marine outfall system. At Dahej, the treated wastewater is recycled and not sent to marine outfall for discharge. AIL conducts monthly wastewater monitoring through third party monitoring agency and the treated water quality meets permit conditions, CETP influent quality conditions and IFC EHS Industry Guideline values applicable for Company operations.
Stormwater management: Jhagadia and Dahej sites have provided stormwater drains to the peripheral areas of the site and individual buildings within the site in line with the AIL Corporate guidelines for environment management updated in Jan 2023. The stormwater drains are connected to stormwater retention tank provisioned with valve gates and pumping arrangement for collecting initial runoff. As per AIL standard operating procedure, if stormwater analysis indicates any contamination, the collected water is diverted to ETP for further treatment prior to discharging off-site. In case of no contamination, the collected stormwater is discharged to off-site GIDC stormwater drain, running parallel and adjacent to the Sites.
Wastes: Hazardous waste generation at AIL sites in Jhagadia and Dahej include ETP sludge, silica, used oil, empty barrels & HDPE bags, discarded containers /bags, process distillation residues & wastes, process residues, spent catalyst, Hydrochloric acid (HCl), Spent Sulphuric acid (H2SO4), Sodium Chloride (NaCl), & Ortho Nitro Phenol (ONP/ Para Nitro Phenol (PNP), Spent Carbon, PPE waste, and off-specification product. AIL has developed site specific hazardous waste management procedures for handling, storage, and disposal of hazardous waste, which includes guideline on segregation of hazardous waste at the source of generation, sending hazardous waste to hazardous waste storage areas, storage and disposal of hazardous waste as per Hazardous and Other Wastes (Management and Transboundary Movement) Rules, 2016. The management of hazardous wastes is assessed to be compliant to regulatory requirements and permit conditions. Company maintains membership in regulator approved Common HW disposal and incineration facility and holds online manifest system during transportation of HW. Like hazardous materials transport discussed below, the company monitors in real time transport of HW vehicles with enabled GPS systems.
As part of the waste management philosophy, AIL aims to reduce incineration of its waste by optimizing the use of the waste resources, reducing energy emissions and consuming raw materials. As a result, the Company reports that it has recycled or reused 85% of hazardous waste generated in FY22 and about 3,400 MT of waste has been sent for co-processing in other industries. Hazardous wastes are converted into valuable products to minimize waste generation and the initiatives includes Hydrochloric acid to Chlorosulfonic acid and Calcium chloride; spent acetic acid to sodium acetate; NOx converted to Nitrosyl sulphuric acid; Waste ammonium chloride to Calcium chloride solution; fly ash for road, brick making and cement industries; and diluted sulfuric acid converted to gypsum, fertilizer, animal feed and to concentrated acid.
Hazardous Material Management: AIL sites manage hazardous chemicals in very large volumes such as Hydrogen & Ethylene via pipeline; Chlorine via pipeline and one tonners; and Sulphur Trioxide, Dimethyl Sulphate, Nitric acid etc. Considering the significant risks and impacts, AIL has developed standard operating procedures for hazardous chemical management at its facilities. Each sites procure, transport, store and handle hazardous chemicals and materials in bulk in mild steel and stainless steel tanks, while non-bulk chemicals are stored in HDPE Carboys, HDPE bags etc. Gaseous raw materials (natural gas, hydrogen, ethylene) are received through overground or underground pipelines from neighbourhood industrial facilities while Chlorine is received through both pipelines and one tonner vehicles.
As part of hazardous chemical management measures every site has implemented control measures including: conduct leak detection and repair (LDAR) program to control emissions from equipment leaks; provided designated storage locations for raw material storage, with impervious layer, RCC roads and flooring to storage areas; dyke walls for bulk storage tanks; closed loops and secondary pellet containment systems to avoid leakage/ spillage; level transmitters/gauges provided to avoid overflow; breather valves/safety valves/flame arrestors installed as appropriate; loading and unloading monitored through the DCS panel; 80% of total capacity is the maximum allowable storage levels; and fencing and access restrictions. Transportation of hazardous chemicals to and from the sites are done in compliance to Motor Vehicle Act & Rules using a specialist third party. More discussions on transportation risks are presented under PS4 below.