New ways to improve volatile fatty acids accumulation in sludge alkaline fermentation system - 文章详情页

作者：

Li, X.-L. (Li, X.-L..) (学者：李晓理) | Peng, Y.-Z. (Peng, Y.-Z..) (学者：彭永臻) | Chai, T.-Z. (Chai, T.-Z..) | Zhu, J.-P. (Zhu, J.-P..) | Wang, S.-Y. (Wang, S.-Y..) (学者：王淑莹) 展开

收录：

Scopus PKU CSCD

摘要：

To　improve　the　hydrolysis　and　acidification　of　activated　sludge,　two　new　ways,　which　were　adding　fermented　sludge　or　sterilized　fermented　sludge　to　batch-mode　activated　sludge　alkaline　fermentation　system,　were　investigated　in　this　study.　Temperature　effect　was　also　studied(10℃　and　35℃).　Result　showed　that　mesophilic　condition　greatly　enhanced　sludge　hydrolysis　and　acidification,　which　resulted　in　an　obvious　volatile　fatty　acids　(VFAs)　accumulation　in　the　system.　These　two　new　ways　could　improve　both　sludge　hydrolysis　and　acidification.　The　hydrolysis　and　acidification　efficiencies　of　adding　sterilized　fermented　sludge　system　were　2　and　1.5　times　higher　than　those　of　adding　fermented　sludge　system,　respectively.　In　addition,　VFAs　content　was　nearly　constant　in　a　long　time　in　sterilized　fermented　sludge　addition　system　while　it　greatly　consumed　in　fermented　sludge　addition　system.　The　reason　for　this　enhancement　of　two　new　ways　were　different,　fermented　sludge　addition　increased　the　amount　of　hydrolytic　enzyme　and　acid-forming　bacteria,　while　sterilized　fermented　sludge　addition　increased　the　amount　of　degradable　substances,　and　the　result　also　demonstrated　that　strengthen　hydrolysis　was　more　important　than　acidification.　Therefore,　mesophilic　condition　together　with　sterilized　fermented　sludge　addition　was　a　more　effective　way　to　enhance　VFAs　accumulation　in　alkaline　sludge　fermentation　process.

关键词：

Alkaline sludge fermentation; Hydrolysis and acidification; Sterilization; Temperature; Volatile fatty acids (VFAs)

作者机构：

[ 1 ] [Li, X.-L.]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
[ 2 ] [Peng, Y.-Z.]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
[ 3 ] [Peng, Y.-Z.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Chai, T.-Z.]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
[ 5 ] [Zhu, J.-P.]State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
[ 6 ] [Wang, S.-Y.]Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, 100124, China