NDLI: Purification effects of two eco-ditch systems on Chinese soft-shelled turtle greenhouse culture wastewater pollution

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Purification effects of two eco-ditch systems on Chinese soft-shelled turtle greenhouse culture wastewater pollution

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Purification effects of two eco-ditch systems on Chinese soft-shelled turtle greenhouse culture wastewater pollution

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Wu, Hao Wu, Xiang Ye, Jinyun
Spatial Coverage	China
Description	Country affiliation: China Author Affiliation: Wu X ( Key Laboratory of Aquatic Resources Conservation and Development, Huzhou University, Huzhou City, Zhejiang Province, 313000, China.)
Abstract	The present study used an eco-ditch system that employed Eichhornia crassipes, Bacillus subtilis, and Bellamya aeruginosa (E–B–B) during the summer and fall (high temperature) seasons and a second eco-ditch system that employed Elodea nuttallii, a compound microbial preparation called “EM bacteria”, and Hypophthalmichthys molitrix (E–E–H) during the winter and spring (low temperature) seasons successively to purify the discharged wastewater produced by Chinese soft-shelled turtle greenhouse cultivation. The wastewater was sampled, and the dynamic changes in the major nutrient pollutant indicators over several months were analysed. After the E–B–B and E–E–H eco-ditch purification systems were operated for nearly 140 days each, the following results were observed: the total nitrogen (TN) removal rates in the wastewater were 75 % and 69 %, respectively; the total phosphorus (TP) removal rates were 82 % and 86 %, respectively; the $NH_{4}^{+}-N$ removal rates were 91 % and 75 %, respectively; the chemical oxygen demand (CODcr) decreased 54 % and 44 %, respectively; the dissolved oxygen (DO) contents increased nearly 3 to 4 times; and the wastewater was maintained at neutral or alkaline pH values. The wastewater physical traits gradually changed from being yellow, brown, and muddy to being pale yellow, slightly turbid, and odourless. Both eco-ditch systems were observed to have a relatively favourable effect on the purification of Chinese soft-shelled turtle aquaculture wastewater. The continuous use of both eco-ditch systems could result in a year-round purification effect on Chinese soft-shelled turtle greenhouse aquaculture wastewater; therefore, this method has good prospects for promotion and application.
ISSN	09441344
Issue Number	8
Volume Number	21
e-ISSN	16147499
Journal	Environmental Science and Pollution Research
Language	English
Publisher	Springer
Publisher Date	2014-04-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Waste Water Chemistry Water Pollutants, Chemical Analysis Water Purification Methods Animal Husbandry Animals China Environmental Pollution Nitrogen Phosphorus Turtles Waste Disposal, Fluid Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine

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