Enhanced anaerobic treatment of CSTR-digested effluent from chicken manure: The effect of ammonia inhibition

Journal Article · Sun Jan 15 00:00:00 EST 2012 · Waste Management

OSTI ID:21612932

Zhanguang, Liu; Xuefei, Zhou ^[1]; Hongguang, Zhu ^[2]

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1. Key Laboratory of Yangtze Water Environment of Ministry of Education, State Key Laboratory of Pollution and Resource Reuse, Tongji University, Shanghai 200092 (China)
2. Institute of Modern Agricultural Science and Engineering, National Engineering Research Center of Protected Agriculture, Tongji University, Shanghai 200092 (China)

Highlights: Black-Right-Pointing-Pointer Enhanced anaerobic treatment of CSTR-digested effluent from chicken manure. Black-Right-Pointing-Pointer The SCOD/TAN (soluble COD/total ammonia nitrogen) ratio was key controlling factor. Black-Right-Pointing-Pointer The threshold of the SCOD/TAN ratio was 2.4 at an influent pH of 8.5-9. - Abstract: The effect of ammonia inhibition was evaluated during the enhanced anaerobic treatment of digested effluent from a 700 m{sup 3} chicken-manure continuous stirred tank reactor (CSTR). A 12.3 L internal circulation (IC) reactor inoculated with an anaerobic granular sludge and operated at 35 {+-} 1 Degree-Sign C was employed for the investigation. With a corresponding organic loading rate of 1.5-3.5 kg-COD/m{sup 3} d over a hydraulic retention time of 1.5 d, a maximum volumetric biogas production rate of 1.2 m{sup 3}/m{sup 3} d and TCOD (total COD) removal efficiency ranging from 70% to 80% was achieved. However, the continual increase in the influent TAN content led to ammonia inhibition in the methanogenesis system. The SCOD/TAN (soluble COD/total ammonia nitrogen) ratio was presented to be the key controlling factor for the anaerobic treatment of semi-digested chicken manure, and further validation through shock loading and ammonia inhibition experiments was conducted. The threshold value of the SCOD/TAN ratio was determined to be 2.4 (corresponding to a TAN of 1250 mg/L) at an influent pH of 8.5-9.

• OSTI ID: 21612932
• Journal Information: Waste Management, Vol. 32, Issue 1; Other Information: DOI: 10.1016/j.wasman.2011.09.015; PII: S0956-053X(11)00396-5; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
AMMONIA
CHICKENS
EFFICIENCY
INHIBITION
MANURES
METHANE
NITROGEN
PH VALUE
RETENTION
SLUDGES
TANKS
AGRICULTURAL WASTES
ALKANES
ANIMALS
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BIRDS
CONTAINERS
ELEMENTS
FOWL
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
MATERIALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC WASTES
VERTEBRATES
WASTES