Company News
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What to do if COD is high in wastewater?
Chemical oxygen demand, also known as chemical oxygen consumption, or COD for short, uses chemical oxidants (such as potassium dichromate) to oxidize and decompose oxidizable substances (such as organic matter, nitrite, ferrous salts, sulfides, etc.) in water, and then Oxygen consumption is calcu...Read more -
What are the advantages and disadvantages of the reflux titration method and the rapid method for COD determination?
Water quality testing COD testing standards: GB11914-89 “Determination of chemical oxygen demand in water quality by dichromate method” HJ/T399-2007 “Water Quality – Determination of Chemical Oxygen Demand – Rapid Digestion Spectrophotometry” ISO6060 “Det...Read more -
What should you pay attention to when using the BOD5 meter?
What should you pay attention to when using the BOD analyzer: 1. Preparation before experiment 1. Turn on the power supply of the biochemical incubator 8 hours before the experiment, and control the temperature to operate normally at 20°C. 2. Put the experimental dilution water, inoculation water...Read more -
New arrival:Optical dissolved oxygen demand meter LH-DO2M(V11)
LH-DO2M (V11) portable dissolved oxygen meter adopts fluorescence dissolved oxygen measurement technology, does not consume oxygen, and is not affected by factors such as sample flow speed, stirring environment, chemical substances, etc. It has strong anti-interference ability and is a multi-func...Read more -
Good news: Winning bid! Lianhua got an order of 40 sets of water quality analyzer from government departments
Good news: Winning bid! Lianhua won the bid for 40 sets of water quality measuring instruments for the ecological law enforcement equipment project in Zhengzhou City, Henan Province, China! New year, new atmosphere, good luck comes in the Year of the Dragon. Recently, good news came from Lianhua...Read more -
Effects of COD, ammonia nitrogen, total phosphorus and total nitrogen on water quality
COD, ammonia nitrogen, total phosphorus and total nitrogen are common major pollution indicators in water bodies. Their impact on water quality can be analyzed from many aspects. First of all, COD is an indicator of the content of organic matter in water, which can reflect the pollution of organi...Read more -
Measurement method of suspended solids: gravimetric method
1. Measurement method of suspended solids: gravimetric method 2. Measuring method principle Filter the water sample with a 0.45μm filter membrane, leave it on the filter material and dry it at 103-105°C to a constant weight solid, and obtain the suspended solids content after drying at 103-105°C....Read more -
Analytical China Exhibition
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Learn about the fast BOD tester
BOD (Biochemical Oxygen Demand), according to the national standard interpretation, BOD refers to biochemical Oxygen demand refers to the dissolved oxygen consumed by microorganisms in the biochemical Chemical process of decomposing some oxidizable substances in water under specified conditions. ...Read more -
New Product Launch: Dual block reactor LH-A220
LH-A220 presets 15 kinds of digestion modes, and supports custom mode, which can digest 2 indicators at the same time, with a transparent anti-splash cover, with voice broadcast and time reminder function. High-quality materials: the upper end of the digestion module is equipped with an aviation ...Read more -
Best Invitation: IE EXPO China 2023
Dear Customers, Our company Lianhua(F17, Hall E4, April 19-21) will participate in the IE expo China 2023. At this final grand event of environmental technology event in 2023, we will show our best and most cutting-edge products and technologies. We look forward to have conversations with industr...Read more -
Lianhua assists in water quality public interest litigation
Why is the Lianhua 5B-2H (V8) field portable measuring instrument favored by users everywhere? In 2019 alone, Chengdu procuratorial organs filed a total of 1,373 public interest litigation cases, an increase of 313% year-on-year. In order to further deepen the public int...Read more
