Disclosed are a method and a system for comprehensive evaluation of organic compound and heavy metal pollution in water based on fish electro-cardio, and fish electro-cardio signals are acquired by a real-time and miniaturized fish electro-cardio acquisition system which includes a real-time and miniaturized fish electro-cardio acquisition device, then a change of the electro-cardio index in a QT interval is obtained for assessing the corresponding organic compound in water to be tested, and a change of the electro-cardio index in a QRS interval is obtained for assessing the corresponding heavy metal in water to be tested. Based on fish electro-cardio acquired continuously on-line in real-time while keeping fish swims in a normal state and the water quality parameters acquired by various water quality sensors, water quality is online analyzed and water sudden pollution is online monitored and assessed.

Disclosed are a method and a system for comprehensive evaluation of organic compound and heavy metal pollution in water based on fish electro-cardio, and fish electro-cardio signals are acquired by a real-time and miniaturized fish electro-cardio acquisition system which includes a real-time and miniaturized fish electro-cardio acquisition device, then a change of the electro-cardio index in a QT interval is obtained for assessing the corresponding organic compound in water to be tested, and a change of the electro-cardio index in a QRS interval is obtained for assessing the corresponding heavy metal in water to be tested. Based on fish electro-cardio acquired continuously on-line in real-time while keeping fish swims in a normal state and the water quality parameters acquired by various water quality sensors, water quality is online analyzed and water sudden pollution is online monitored and assessed.

A biological toxicity test method for evaluating an ecological safety of an advanced oxidation process comprising the following steps: (1) collecting (preparing) a waste water to be determined; (2) collecting the waste water and a tap water after the advanced oxidation process treatment; (3) subjecting Koi (Cyprinus carpio haematopterus) to the water after treatment for exposure to poison; (4) Determining an anti-oxidation enzyme activity of a liver of the Koi after exposure; (5) Data analyzing. By comparing the changes of liver enzyme activities in different water, the present method evaluates the toxicity changes of micro-pollutant containing water before and after treatment, which fills in the gap of the ecological risk assessment for advanced oxidation technology.

A method for testing ecotoxicity of disinfection by-products (DBPs) is disclosed, including the following steps: firstly, hatching and culturing a brine shrimp to obtain a second-instar brine shrimp larvae; secondly, putting the brine shrimp larvae into a water sample containing the DBPs, obtaining a survival rate through acute toxicity exposure and chronic toxicity exposure, respectively, to calculate the toxicity of the water sample to brine shrimp. The new method includes both acute and chronic toxicity tests. The test water sample can be either a single substance solution or an actual disinfection water sample. The brine shrimp has high sensitivity and is convenient to hatch and culture. The raw materials are inexpensive and easily available. The requirements for the culture environment are not high, and the toxicity end-point is clear. The new method is simple, sensitive and economical, and therefore, a popularization is feasible in sewage and reuse water plants.

The present invention provides methods for determining the toxicity of fresh-water and marine sediments and sediment pore water containing indigenous or introduced toxicants from each as a one-time analysis and/or for analysis over a period of time. The present invention further provides kits assembled for the afore-mentioned determination. The methods and kits of the present invention can be used for analyzing sediment and pore water samples from, among other locations, all environments where species having a dormant life stage may exist including, for example, natural zooplankton.

The invention simulation device and method for studying the influence of wetland plant litter decomposition on water quality, belongs to the ecological engineering field. The simulation device comprises a distributing reservoir, a planting pool and a discharge bay, and the three are connected successively through a first-level pipeline; the distributing reservoir is used to supply water to the planting pool; the discharge bay is used to collect wastewater discharged from the planting pool; the planting pool comprises a plurality of planting units; the planting unit is a container-like structure and used to hold the planting substrate and plant wetland plants on the planting substrate. By using the simulation device and/or simulation method of the invention, the whole process of the influence of plant litters especially wetland plants litters on water quality under natural state can be highly simulated and restored.

The present disclosure provides methods for determining the toxicity of fresh-water and marine sediments and sediment pore water containing indigenous or introduced toxicants from each as a one-time analysis and/or for analysis over a period of time. The present disclosure further provides kits assembled for the afore-mentioned determination. The methods and kits of the present disclosure can be used for analyzing sediment and pore water samples from, among other locations, all environments where species having a dormant life stage may exist including, for example, natural zooplankton.

Low or no disturbance sampling can be accomplished such as through a single-platform aquatic species and habitat sampling system with data integration and rapid processing capabilities that can address the need for sampling at variable depths over varied habitats, along with the simultaneous collection of linked physical and biological data. The platform may be based on a 24-36 foot boat, and may include a net mouth opener brace for an adjustable concentrator net and smaller drift net which may be attached to an adjustable sample chamber, perhaps containing variable mesh capture nets as well as cameras, water sampling equipment, and water quality sensors integrated with a fish finder, GPS, and other monitoring and data recording equipment. The depth of the net mouth opener brace and sample chamber may be adjustable using a depth control.

Aquatic organism monitoring devices and aquatic organism monitoring methods are described. According to one aspect, a monitoring device includes a housing configured to be physically associated with an aquatic organism, environmental circuitry configured to generate a first output indicative of at least one environmental parameter of an environment of the organism, behavioral circuitry coupled with the housing and configured to generate a second output indicative of at least one behavioral parameter of the organism, physiological circuitry coupled with the housing and configured to generate a third output indicative of at least one physiological parameter of the organism, and a transmitter configured to transmit an acoustic signal externally of the housing, and wherein the acoustic signal includes information regarding one or more of the at least one environmental parameter, the at least one behavioral parameter, and the at least one physiological parameter.

Provided is a small and simple automatic water quality surveillance apparatus that can automatically sense toxic substances, oil, mold, or the like contained in raw water. The apparatus includes an odor-sensing water tank through which the raw water circulates. The tank further includes an odor sensor sensing an odor, such as an oily odor, a mold odor, and so on. Upon having sensed the toxic substances, oil, mold, or the like, an alarm is automatically issued thereby.