To improve the ability of the rice husk to purify colored wastewater, effluent from the alkaline scouring of cotton yarn was used immediately after the scouring (without cooling and additionally added chemicals) in order to remove the non-cellulosic silicon-lignin shield from the rice husk’s surface. This rice husk, with 93.8 mg/g adsorption capacity, behaves similarly as the rice husk treated with an optimized alkaline scouring recipe consisting of 20 g/L NaOH, 2 mL/L Cotoblanc HTD-N and 1 mL/L Kemonecer NI at 70 °C for 30 min with an adsorption capacity of 88.9 mg/g of direct Congo red dye. Treating one form of waste (rice husk) with another (effluent from the alkaline scouring of cellulosic plant fibers), in an effort to produce a material able to purify colored effluent, is an elegant environment-friendly concept based on the circular economy strategy. This will result in a closed-loop energy-efficient process of the pre-treatment of cotton (alkaline scouring), modification of rice husk using effluent from the alkaline scouring, dyeing cotton fabrics and cleaning its colored effluents with modified rice husk without adding chemicals and energy for heating.

中文翻译：

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基于循环经济概念的碱性精练废水改良稻壳脱色能力的提高

为了提高稻壳净化有色废水的能力，在洗净后立即使用棉纱碱洗产生的废液（无需冷却和添加化学药品），以便从稻中去除非纤维素硅木质素保护层外壳表面。这种稻壳具有93.8 mg / g的吸附能力，其行为与采用优化的碱性精练配方（包括20 g / L NaOH，2 mL / L Cotoblanc HTD-N和1 mL / L Kemonecer NI）处理的稻壳相似（70）室温下30分钟，直接刚果红染料的吸附量为88.9 mg / g。努力将一种形式的废物（稻壳）与另一种形式的废物（纤维素植物纤维的碱性洗涤产生的废水）进行处理，以生产能够净化有色废水的材料，是基于循环经济战略的优雅环保概念。这将导致棉花预处理（碱精练），使用碱性精练废水处理稻壳，对棉织物染色以及用改性稻壳清洁其有色废水而不添加化学物质的闭环节能工艺。和加热能量。