Funding for this research was provided by:
China Scholarship Council (201508050090)
Japanese Ministry of Land, Infrastructure, Transport and Tourism (2015)
Japan Sewage Works Association (No. 28-16)
Article History
Received: 13 November 2017
Accepted: 21 February 2018
First Online: 30 March 2018
Compliance with Ethical Standards
:
: The authors declare that they have no competing interest.