Department of Environmental Engineering, Faculty of Civil, Environmental, and Geo Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia; Faculty of Engineering, Universitas Singaperbangsa Karawang, Teluk Jambe Timur, Karawang, 41361, Indonesia.
Department of Environmental Engineering, Faculty of Civil, Environmental, and Geo Engineering, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya, 60111, Indonesia.
J Environ Manage. 2018 Nov 1;225:356-363. doi: 10.1016/j.jenvman.2018.08.010. Epub 2018 Aug 6.
Biodecomposition of organic solid waste during composting process produces compost humic acid-like (cHAL), which is classified as biobased surfactant. The present study aimed to characterize the properties of cHAL substance which was formed during the composting process of crude oil contaminated soil, in terms of surface tension decline (ΔST) and emulsification activity (EA), and evaluate the ability to solubilize hydrocarbons. Crude oil contaminated soil from a public oilfield in Wonocolo Sub-district, Bojonegoro, Indonesia, was composted under aerobic condition with varied biodegradable waste (yard waste and rumen residue) in separate reactors. The cHAL compounds were isolated from composting products from yard waste (Y), rumen residue (R), control of contaminated soil (S), and mixed of contaminated soil and biodegradable waste (SYR). The results showed that ΔST of cHAL isolates were ranged from 6.65 to 21.50 mN/m. The EA of cHAL isolates were in the range of 7.35-38.01%. The cHAL isolates were capable to solubilize 99 to 10,710 μg/g of hydrocarbons. The cHAL isolates from R and SYR are potential as surface tension reducer and emulsifier for hydrocarbon with values of those isolates were close to 0.50% Tween 80 characteristics, and the abilities to solubilize hydrocarbon were comparable to 1.00% Tween 80. A composition of 50% crude oil contaminated soil and 50% of biodegradable waste (yard waste and rumen residue) is recommended for composting crude oil contaminated soil.
在堆肥过程中，有机固体废物的生物分解会产生堆肥腐殖酸样物质（cHAL），它被归类为生物基表面活性剂。本研究旨在从表面张力降低（ΔST）和乳化活性（EA）方面对在受污染土壤的堆肥过程中形成的 cHAL 物质的特性进行表征，并评估其溶解烃类物质的能力。从印度尼西亚武诺科洛区公共油田的受污染土壤中，在不同的可生物降解废物（庭院废物和瘤胃残渣）在单独的反应堆中进行好氧条件下的堆肥。从庭院废物（Y）、瘤胃残渣（R）、受污染土壤对照（S）和混合受污染土壤和可生物降解废物（SYR）的堆肥产物中分离出 cHAL 化合物。结果表明，cHAL 分离物的 ΔST 范围为 6.65 至 21.50 mN/m。cHAL 分离物的 EA 范围为 7.35-38.01%。cHAL 分离物能够溶解 99 至 10710μg/g 的烃类物质。R 和 SYR 中的 cHAL 分离物具有作为表面张力降低剂和乳化剂的潜力，用于烃类物质，其值接近 0.50%吐温 80 的特性，并且溶解烃类物质的能力与 1.00%吐温 80 相当。建议将 50%受污染土壤和 50%可生物降解废物（庭院废物和瘤胃残渣）的混合物用于堆肥受污染土壤。
