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- Title
Enhancement of anaerobic digestive efficiency by the use of exchange resin to remove cations in sewage sludge.
- Authors
Dai, Xiaohu; Ye, Ning; Luo, Fan; Dong, Bin
- Abstract
Hydrolysis is considered as the rate-limiting stage of anaerobic digestion which is one of the most applied stabilization processes in the disposition of sludge. It is urgent to accelerate the hydrolysis of the sludge particles and improve its biodegradability. This study utilized cation-exchange resin (CER) to adsorb divalent cations in the supernatant of activated sludge with the purpose of making the sludge floc disintegrated. The results showed that the biopolymers incorporated in the tightly bound extracellular polymeric substances can be released to the bulk using CER to remove cations. However, the lack of essential elements led to a much lower methane yield of treated sludge than that of activated sludge. The treated sludge got a higher methane production rate constants after added Fe2+. It is necessary to add Fe2+or regenerated liquid of resin-containing essential elements in order to maintain the activities of microbial life.
- Subjects
HYDROLYSIS; SEWAGE purification; CATIONS; SLUDGE management; SEWAGE disposal
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 14, p6202
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2015.1007171