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Polystyrene microplastics and nanoplastics distinctively affect anaerobic sludge treatment for hydrogen and methane production

The Science of The Total Environment 2022 31 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Zhijie Chen, Zhijie Chen, Wei Wei, Wei Wei, Wei Wei, Zhijie Chen, Wei Wei, Wei Wei, Xueming Chen, Wei Wei, Wei Wei, Xueming Chen, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Zhijie Chen, Zhijie Chen, Zhijie Chen, Wei Wei, Wei Wei, Chen Wang, Chen Wang, Chen Wang, Wei Wei, Chen Wang, Wei Wei, Zhijie Chen, Zhijie Chen, Bing‐Jie Ni Zhijie Chen, Bing‐Jie Ni Xueming Chen, Xueming Chen, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Zhijie Chen, Zhijie Chen, Chen Wang, Zhijie Chen, Zhijie Chen, Zhijie Chen, Wei Wei, Wei Wei, Xueming Chen, Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Yun Wang, Yun Wang, Bing‐Jie Ni Zhijie Chen, Wei Wei, Wei Wei, Chen Wang, Wei Wei, Wei Wei, Zhijie Chen, Bing‐Jie Ni Zhijie Chen, Yun Wang, Bing‐Jie Ni Xueming Chen, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Yun Wang, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Wei Wei, Chen Wang, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Xueming Chen, Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Bing‐Jie Ni Yun Wang, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Wei Wei, Wei Wei, Xueming Chen, Zhijie Chen, Xueming Chen, Zhijie Chen, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Xueming Chen, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Xueming Chen, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni Zhijie Chen, Zhijie Chen, Bing‐Jie Ni Bing‐Jie Ni Bing‐Jie Ni Wei Wei, Bing‐Jie Ni

Summary

Researchers found that polystyrene microplastics and nanoplastics have distinct effects on anaerobic sludge treatment, with nanoplastics generally inhibiting both hydrogen and methane production while microplastics could actually promote hydrogen generation under certain conditions.

Polymers

Study Type Environmental

Microplastics and nanoplastics generally accumulated in waste activated sludge (WAS) after biological wastewater treatment. Currently, researches mainly focused on how plastics affected a particular sludge treatment method, without the comparison of different sludge systems. Herein, distinct responses of hydrogen-producing and methane-producing sludge systems were comprehensively evaluated with polystyrene microplastics (PS-MPs) and nanoplastics (PS-NPs) existence. Experimental results showed that PS particles would stimulate inhibition on anaerobic gas production except that PS-MPs were conducive to hydrogen accumulation, which was caused by the enhanced solubilization. Mechanistic investigation demonstrated that severe inhibition of PS-NPs to hydrogen production was derived from the excessively inhibitory hydrolysis despite of improving solubilization. Varying degrees of inhibition to acidification and methanation collectively contributed to reduced methane accumulation with exposure to PS-MPs and PS-NPs. Excessive oxidative stress would be generated in the presence of PS-MPs or PS-NPs, deteriorating microbial activities and richness of species responsible for hydrogen or methane production.

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