title: A novel PSB-EDI system for high ammonia wastewater treatment, biomass production and nitrogen resource recovery: PSB system.
abstract: A novel process coupling photosynthetic bacteria (PSB) with electrodeionization (EDI) treatment was proposed to treat high ammonia wastewater and recover bio-resources and nitrogen. The first stage (PSB treatment) was used to degrade organic pollutants and accumulate biomass, while the second stage (EDI) was for nitrogen removal and recovery. The first stage was the focus in this study. The results showed that using PSB to transform organic pollutants in wastewater into biomass was practical. PSB could acclimatize to wastewater with a chemical oxygen demand (COD) of 2,300 mg/L and an ammonia nitrogen (NH4(+)-N) concentration of 288-4,600 mg/L. The suitable pH was 6.0-9.0, the average COD removal reached 80%, and the biomass increased by an average of 9.16 times. The wastewater COD removal was independent of the NH4(+)-N concentration. Moreover, the PSB functioned effectively when the inoculum size was only 10 mg/L. The PSB-treated wastewater was then further handled in an EDI system. More than 90% of the NH4(+)-N was removed from the wastewater and condensed in the concentrate, which could be used to produce nitrogen fertilizer. In the whole system, the average NH4(+)-N removal was 94%, and the average NH4(+)-N condensing ratio was 10.0.
authors: School of Environment and Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China E-mail: zgm@ruc.edu.cn.
authors: Hangyao
authors: H
authors: Wang
authors: Changjiang Water Resources Protection Institute, Wuhan, Hubei 430051, China.
authors: Qin
authors: Q
authors: Zhou
authors: School of Environment and Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China E-mail: zgm@ruc.edu.cn.
authors: Guangming
authors: G
authors: Zhang
authors: Beijing Key Laboratory for Source Control Technology of Water Pollution, Beijing Forestry University, Beijing 100083, China.
authors: Guokai
authors: G
authors: Yan
authors: College of Water Resource and Civil Engineering, China Agriculture University, Beijing 100083, China.
authors: Haifeng
authors: H
authors: Lu
authors: School of Environment and Natural Resource, Renmin University of China, 59 Zhongguancun Street, Beijing 100872, China E-mail: zgm@ruc.edu.cn.
authors: Liyan
authors: L
authors: Sun
mesh_terms: D000641:Ammonia / Q000737:chemistry / Q000378:metabolism*; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D009584:Nitrogen / Q000737:chemistry* / Q000378:metabolism; D010788:Photosynthesis; D012241:Rhodopseudomonas / Q000254:growth & development / Q000378:metabolism* / Q000528:radiation effects; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D000641:Ammonia; D009584:Nitrogen; D062065:Wastewater