It's the first fertilizer-making project in Jiangsu with a sewage zero-discharge system, chosen as one of the top ten cases of ecological & environmental tech achievements in 2023 for the green, low-carbon industry. Jingyu Environment took on Linggu Chemical's sewage zero-discharge project. Its system treats 470 cubic meters of wastewater per hour, yielding 20 tons of 98.5%-pure industrial salt (NaCl, Na₂SO₄) daily, achieving 100% wastewater reuse and adding 2.6 million tons of recycled water yearly.