Displaying items by tag: Water

Pakistan: The Supreme Court has asked cement producers using water near the Katas Raj Temples in Punjab to submit recommendations for a policy on how they should pay for the resource. The court noted that the companies have used water worth ‘billions of rupees’ without any payment, according to the Pakistan Observer newspaper. Chief Justice Mian Saqib Nisar criticised a local government official, “for giving away everything for free.” The court has been investigating media reports that the pond at the Hindu heritage site was drying out due to water consumption by nearby cement plants.

India: Heidelberg Cement India has been certified as over six times net water positive by TOV SOD, an independent certifying agency. During the 2016 – 2017 financial year the company’s cement plants withdrew 1.09kL of water from various sources but they harvested 6.97kL of water. This implies that the company collected more water from sustainable sources, such as rainfall, than it used. The company's multidimensional approach includes diverting rainwater to
reservoirs, installing water harvesting systems, reviving of bore wells, controlling seepage and educating its staff on water conservation.

Water conservation is on the agenda this week with two water-related news stories from the multinational cement producers.

First came a story that Lafarge Canada is preparing to run a trial using waste water from hydraulic fracking at its Brookfield cement plant in Nova Scotia. Currently the plant uses 35ML/yr of fresh water from a nearby lake to control temperatures of its rotary cement kiln. Potentially some of this water could be replaced with water produced during the fracking process. This water would then evaporate and be emitted from the stack.

The background to this pilot project is that the Nova Scotia regional government introduced a two-year moratorium on fracking in 2012 while it reviews the situation. Given the high level of public debate on fracking, any process using waste products from it is going to receive a high level of attention. One of the major arguments against fracking concerns the toxicity of the fluids used. Hence Lafarge stressed in their statement how safe the waste water would be before it would even be used in the plant. Safe enough to drink apparently.

Focusing on the industrial aspects of the pilot for cement production, it will be fascinating to see what effects the fracking waste water might have even just as a coolant on plant equipment. Among other contaminants, fracking waste water often contains high levels of salt. Managing a transition from a fresh water coolant source to a saltier more corrosive one may pose the first of many challenges.

Later in the week Cemex announced the latest stage in its work on water conservation with the implementation of a corporate water policy. The policy aims to focus on resource availability, resource quality, and ecosystem integrity. It continues Cemex's Water Project, developed in partnership with the International Union for Conservation of Nature.

Notably Cemex's water policy aims to maximise efficiency by managing water consumption with increased captured recycled or captured water usage given as an example. How Cemex might use recycled water from a contentious industrial process such as hydraulic fracking is not specified. However, the policy does aim to actively reduce pollution and limit the effects of discharge upon water ecosystems from its operations.

Water policies such as a Cemex's are great for an industry that often has an image problem in the eyes of environmentalists. Linking cement production to fracking runoff will not improve this image. Yet placing science before lobbying is the way to go. Bring on the results of the pilot.

It's been a cold and rainy 'summer' so far in 2013 in the UK. So much so that crowds at the Glastonbury Music Festival watching the Rolling Stones this weekend were lucky they didn't get drenched during 'Jumpin' Jack Flash.' However, cement producers around the world are increasingly tackling the opposite problem as they concentrate on water conservation measures.

As we see this week, the Cement Manufacturers' Association of the Philippines (CeMAP) has started advocating the use of rainwater for cement production. According to figures put out by CeMAP, an average dry-process cement plant uses 100-200L of water per tonne of clinker produced. The Philippines uses around 3.2BnL/yr of water for its cement production capacity of 21Mt/yr, which operated at an 85% capacity utilisation rate in 2012. A simple calculation reveals a water usage rate of 179L/t of cement produced in the Philippines. Though close to the top of CeMAP's dry-process water use range, it is actually less than some of the multinational cement producers (see below).

Water conservation among multinational cement producers has become increasingly high-profile in recent years. In January 2013 Cemex announced that it had developed a methodology to standardise water measurement and management across all of the company's operations. This followed a three year partnership between Cemex and the International Union for Conservation of Nature (IUCN). In its 2012 Sustainability Report Cemex reported that 12% of its cement operations were in water-scarce or water-stressed locations. Its water consumption for cement was 305L/t. This compares to Holcim's water consumption for cement of 260L/t in 2012.

Other multinational cement producers have put into place similar measures. Lafarge started to assess its 'water risk' in 2011. It found that 25% of its cement production sites were located in areas of water scarcity or high water scarcity, based on 2025 projections of annual renewable water supplies per person. A follow-up with the WWF Water Risk Filter (WRF) continued the assessment, identifying 15 Lafarge cement sites as being located in 'high-risk' basins, with 10 particular sites identified in Pakistan, India, Algeria, Mexico, Jordan, China, South Africa, Iraq and Uganda.

It is worth noting here that most of these countries are currently growth areas for cement demand and so producers with plans to expand in these regions need to tread a careful line. Cement makers that use vast amounts of water in water-scarce regions will be less desirable neighbours for local populations than those that use less water. This, like consumer and regulatory pressures in developed markets, could turn into a major driving factor for improved environmental performance in developing regions. Investing in water conservation measures therefore appears to make sense socially, environmentally and (ultimately) economically.