MPSR无污泥外排系统长期运行机制分析

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Abstract In response to the increasingly prominent problems of large residual sludge output and difficult disposal, the experiment used a micro-pressure swirl reactor (MPSR) to treat sewage in a sludge-free discharge mode. MPSR had an effective volume of 36L and ran in batch mode. The operating parameters were aeration rate of 0.14m³·h^-1, drainage ratio of 50%, operation period of 12h, and the inlet temperature was (20±1)℃, continuous operation for 225d. The experimental results showed that MPSR had a good pollutant removal effect, the average removal rates of COD, TP, NH₄⁺-N, and TN reached 85%, 95%, 95%, and 75%, respectively. During the operation, the stability of SVI, microscopic examination and the substantial reduction of EPS showed that the system did not have filamentous bacteria and extracellular polymer secretions, which ensured that the sludge still had high-efficiency settling viscosity conditions under the large increase of sludge-free MLSS. High-throughput sequencing analysis showed that the system had high stability and higher abundance of nitrogen and phosphorus removal in the stable period, which ensured the long term sequential batch operation of the sludge-free MPSR system and the high efficiency of pollutant degradation.

Key words： micro-press swirl reactor(MPSR) sludge-free discharge system pollutant removal rate high-throughput sequencing system stability

Received: 08 June 2020

PACS:

X703.1

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	Articles by authors
	LI Qing-zhe
	BIAN De-jun
	NIE Ze-bing
	ZHENG Shao-jie
	WANG Fan
	AI Sheng-shu
	ZHU Sui-yi

Cite this article:

LI Qing-zhe,BIAN De-jun,NIE Ze-bing等. Analysis of the long-term operation mechanism of MPSR sludge-free discharge system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(1): 169-176.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I1/169

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