Synthetic household chemical products (HCP) are used in various household activities. An average urban household was estimated to consume ~ 3 kg HCP per month while discarding 212–387 mg/L HCP in sewage comprising > 265 different chemical compounds. The high sorption properties of HCP and their antimicrobial resistance lead to their long-term persistence in the environment. The intrusion of HCPs and their breakdown products into food chain causes detrimental effects on health and ecology. HCPs comprise mostly of a mixture of xenobiotics, organic and inorganic compounds resulting in an impaired biodegradation. Yet, the biodegradability of HCPs is seldom assessed. Therefore, this research proposes a modified Gompertz model approach to analyze BMP data in order to classify commercially available HCPs into seven groups based on the observed levels of recalcitrance and is in turn coined “Anaerobic Biodegradability Index” (ABI, beginning from ABI-VI to ABI-0 wherein ABI-VI represents the highest degradability and ABI-0 the least). This approach emulates “Energy-Star” ratings of electrical appliances classified based on electrical efficiency. Results of such a classification indicated that HCPs containing ≥ 10% anionic surfactants such as laundry detergents, handwash gel, dishwasher chemicals, and creosote surface cleaner, exhibit lowered anaerobic degradability and were therefore categorized between ABI-0 and ABI-II. Whereas the highly degradable HCP such as toothpaste, shower gel, and hair shampoo were categorized in ABI-V and ABI-VI categories. We perceive that the weightages and concentrations can be used in the future to define the capability of various wastewater treatment systems and their tolerance to various ABI classes.

合成家用化学产品（HCP）用于各种家庭活动。据估计，平均每个城市家庭每月消耗约3千克HCP，而在包含> 265种不同化合物的污水中丢弃212–387 mg / L HCP。HCP的高吸附性能及其抗微生物性导致它们在环境中长期存在。六氯苯酚及其分解产物侵入食物链会对健康和生态产生不利影响。六氯苯酚主要由异生物素，有机和无机化合物的混合物组成，导致生物降解受损。但是，很少评估HCP的生物降解性。因此，这项研究提出了一种改良的Gompertz模型方法来分析BMP数据，以便根据观察到的顽固性水平将市售HCP分为7组，并因此被称为“厌氧生物降解指数”（ABI，从ABI-VI到ABI- 0，其中ABI-VI代表最高的可降解性，而ABI-0代表最低的可降解性。这种方法模拟了根据电效率分类的电器的“能源之星”评级。这种分类的结果表明，含有≥10％阴离子表面活性剂（如洗衣粉，手洗凝胶，洗碗碟剂化学物质和杂酚油表面清洁剂）的HCP表现出较低的厌氧降解性，因此分类为ABI-0和ABI-II。而高度可降解的HCP（例如牙膏，沐浴露）和洗发水分类为ABI-V和ABI-VI。我们认为重量和浓度可以在将来用于定义各种废水处理系统的功能及其对各种ABI类的耐受性。