Applied Research on the Resource Recovery of Formaldehyde in Pesticide Wastewater

Abstract

Applied research on the technology of resource recovery of formaldehyde in pesticide wastewater through compression distillation was accomplished intensively in this study. Vapor–liquid equilibrium data of the low-molar fraction formaldehyde aqueous solution were measured accurately in experiments. The results were in high accordance with the theoretical values through data association. It filled in a gap in data at the zone of low formaldehyde molar fraction (particularly below 0.006) and also provided theoretical basis for the distillation column design for recycling formaldehyde. Systematic experimental research investigated the recovery of formaldehyde in pesticide wastewater by compression distillation. The distillation column was operated under a top pressure of 0.2 to 0.4 MPa and with feed formaldehyde molar fraction range of approximately 0.006 to 0.03. The formaldehyde molar fractions at the top and bottom of column were 0.15 and 0.00072, respectively. Therefore, concentrated formaldehyde solution can be obtained for recycling, whereas the formaldehyde composition of residual wastewater reached the standard of biochemical treatment. Therefore, compression distillation was a feasible approach to the treatment of wastewater with low-molar fraction formaldehyde.

Activity‐Based Protein Profiling – Enabling Phenotyping of Host‐Associated and Environmental Microbiomes

“…Another example is the use of a chemiluminescent activity‐based probe for the identification of formaldehyde (FA). FA is a common environmental toxin that can be found in pesticides, naturally in food, and contaminated water due to industrial processes [44–46] . In addition to environmental exposure, FA is it is also naturally produced by the host and is involved in various metabolic and epigenetic processes.…”

“…FA is a common environmental toxin that can be found in pesticides, naturally in food, and contaminated water due to industrial processes. [44][45][46] In addition to environmental exposure, FA is it is also naturally produced by the host and is involved in various metabolic and epigenetic processes. Formaldehyde has also been implicated to play a critical role in Alzheimer's disease.…”

The preparation, characterization of FeC micro‐electrolysis materials using low‐cost biochar and the removal of ultra‐high COD pesticide wastewater

“…The pesticide wastewater contains a variety of organic compounds and various salts (Li et al . ), which is very difficult to treat (Schulmeyer et al . ).…”